The best Kafka tool for Aiven’s standalone Kafka Connect service is one that reaches the service’s REST API alongside the Aiven brokers and Karapace, shows each connector’s tasks and the stack trace of the one that failed, restarts the right thing, keeps the secrets in connector configurations out of view, decides per person who may create or change a connector and records who did, and runs as one container in your own environment, out of the data path. Kpow, the Aiven Console, Kafbat UI, AKHQ, the Connect REST API itself and Conduktor were each checked against their own documentation and Aiven’s. Scored on the six weighted criteria explained below the rankings, Kpow ranks first with 99 out of 110, ahead of the Aiven Console at 75 and Kafbat UI at 72.
Tools compared
| Rank | Tool | Total (out of 110) | Out of the data path | Production access on request | Audit trail per person | Connector operations | Directory and Kafka sign-in | Many teams, shared clusters | Cost a year, one cluster (modelled) |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Kpow | 99 | One container, no external database, not a proxy | Temporary policies, staged approvals, redacted config values | Every action and data read, by user | Task state and traces, capped auto-restart; standalone service only | SAML, OpenID, LDAP; SCRAM, PEM mTLS or OIDC to Aiven | Tenants per team, connectors included | $7,380 |
| 2 | Aiven Console | 75 | Nothing to deploy | Configs need data access; no expiring grant | Project event log | Both Connect types; auto-restart restarts the whole connector | Aiven login and identity provider | Per project or per service | $0 |
| 3 | Kafbat UI | 72 | One container, no database | RBAC, no expiring grant | Topic or log, no view | Status, edit, restart failed tasks; no auto-restart | OAuth2, OIDC, LDAP | Roles per resource | $8,640 |
| 4 | AKHQ | 62 | One container, no database | Regex groups, off by default | Opt-in topic, no reads | Status, restart connector or task | LDAP, OIDC | Regex groups | $8,640 |
| 5 | The Connect REST API and scripts | 53 | Nothing beyond the service | Whoever holds the credentials | No record by person | Every operation, nothing automatic | Basic authentication only | None | $11,520 |
| 6 | Conduktor | 69 | Console on PostgreSQL; Gateway, a proxy, for data-level controls | Masking exemptions, owner approval | 70+ event types in the UI | Failed-task auto-restart with history, alerts | LDAP, OIDC | Groups; Virtual Clusters need Gateway | $32,880; $122,880 with Gateway Core and Protect |
The tools, ranked for Aiven Kafka Connect
Rank 1 Kpow
99 out of 110 Total
Try Kpow in the live demo No signup needed.
- Cost a year
- $4,500 per Kafka cluster with 100 users included, plus about $2,880 in operator time, so $7,380 on one cluster (modelled)
- On Aiven Connect
- The standalone Connect service by REST URL and basic authentication, beside the Aiven brokers and Karapace
- Deployment
- One container or JAR, no external database
- Out of the data path ×3 weight, this criterion counts 3 times toward the total
- 9 out of 10
- Production access on request ×2 weight, this criterion counts 2 times toward the total
- 9 out of 10
- Audit trail per person ×2 weight, this criterion counts 2 times toward the total
- 9 out of 10
- Connector operations ×2 weight, this criterion counts 2 times toward the total
- 9 out of 10
- Directory and Kafka sign-in
- 9 out of 10
- Many teams, shared clusters
- 9 out of 10
Why these scores for Kpow
- Out of the data path 9 out of 10
- It is one container or JAR whose snapshots, metrics and audit log live in topics on your own Aiven Kafka service, and it reaches Connect through the Connect REST API and Kafka as an ordinary client, so nothing sits between your connectors and the brokers.
- Production access on request 9 out of 10
- Temporary policies grant time-boxed access that an admin or a change system calling the Kpow API can create, staged mutations hold any action for approval, sensitive connector config values are redacted when a config is edited, and data policies mask fields in inspection, though masking is per resource rather than per viewer.
- Audit trail per person 9 out of 10
- Every action is recorded with the user from the identity provider and the policy that allowed it, including data inspect queries, with a seven-day view in the product, the record written to an audit topic on your own cluster, and webhooks that send it to a SIEM for long-term retention.
- Connector operations 9 out of 10
- Connector and task state sit side by side with task stack traces, individual tasks restart from the task table, and auto-restart of named or wildcard connectors runs on a one-minute interval with a 10-minute window and a cap of 50 restarts per interval, each restart written to the audit log; it is held below 10 because Conduktor restarts only the failed tasks automatically and keeps a restart history, and it does not reach Connect running on the Aiven Kafka service itself.
- Directory and Kafka sign-in 9 out of 10
- People sign in with SAML, OpenID or LDAP, and Kpow connects to Aiven with SASL/SCRAM, mutual TLS from the PEM files Aiven issues or OAuth/OIDC, and to the standalone Connect service’s REST API with its basic authentication credentials.
- Many teams, shared clusters 9 out of 10
- Tenants scope each team to its own topics, consumer groups and connectors on a shared cluster, and RBAC adds Allow, Deny or Stage per action.
On Aiven Kafka Connect. Kpow’s Aiven documentation covers the brokers, Karapace and the standalone Aiven Connect service from one instance. The Connect service is added with CONNECT_NAME, CONNECT_REST_URL, CONNECT_AUTH=BASIC and the service’s username and password, and the same Kafka Connect configuration lists several Connect clusters with CONNECT_RESOURCE_IDS, so Aiven Connect and a self-managed Connect cluster can sit side by side. The Kafka Connect management page covers creating connectors from a form, editing configs with sensitive values redacted, and restarting individual tasks or reading their stack traces.
Where it falls short. Connect running on the Kafka service itself is not supported, because Aiven exposes no REST API for it, and Kpow’s documentation covers Aiven’s Classic Kafka service, so a team on Standard Kafka should test before relying on it. On plans that cap topic retention, the __oprtr_audit_log topic has to be created with a finite retention before the first start. Alert rules on connector state go through Prometheus and Alertmanager rather than being built in. Kpow governs people working through Kpow, so the Connect REST API stays open to anyone holding the service’s credentials. RBAC, masking, staged mutations and the full audit log need Kpow Enterprise; Community Edition is free for 3 clusters and 10 users.
Compare Kpow vs Kafbat UIKpow vs AKHQ
Rank 2 Aiven Console
aiven.io
75 out of 110 Total
- Cost a year
- $0 licence and nothing to run (modelled)
- On Aiven Connect
- Connectors on both the Kafka service and a standalone Connect service, plus the avn CLI and Terraform
- Deployment
- Nothing to deploy
- Out of the data path ×3 weight, this criterion counts 3 times toward the total
- 10 out of 10
- Production access on request ×2 weight, this criterion counts 2 times toward the total
- 3 out of 10
- Audit trail per person ×2 weight, this criterion counts 2 times toward the total
- 5 out of 10
- Connector operations ×2 weight, this criterion counts 2 times toward the total
- 8 out of 10
- Directory and Kafka sign-in
- 8 out of 10
- Many teams, shared clusters
- 5 out of 10
Why these scores for Aiven Console
- Out of the data path 10 out of 10
- There is nothing to deploy and nothing between clients and brokers, since this is Aiven’s own control plane, which makes it the best on this criterion.
- Production access on request 3 out of 10
- Aiven’s roles and permissions documentation keeps connector configurations from the read-only role and requires the service:data:write permission to view them, because they can contain secrets in plain text, but it describes no time-boxed grant, no approval step and no redaction of single config values.
- Audit trail per person 5 out of 10
- The project event log records changes to the project and its services, and the documentation read for this page does not say that it records each connector edit, pause or restart against the person who made it.
- Connector operations 8 out of 10
- The Connectors page creates, edits, pauses and restarts connectors on both kinds of Aiven Connect, the avn CLI adds a restart for a single task, and an automatic restart option is a per-connector setting, but by Aiven’s own description that option restarts the entire connector rather than only the failed tasks, and it is not recommended for recurring failures.
- Directory and Kafka sign-in 8 out of 10
- People use their Aiven login, with the organization’s identity provider where one is set up, and the console needs no Kafka or Connect credentials of its own.
- Many teams, shared clusters 5 out of 10
- Roles and permissions are granted per project or per service, so a team can be given its own Connect service, but the documentation read for this page describes no permission per connector inside a shared one.
What it covers. The console’s Manage stream, Connectors page lists the connectors on an Aiven for Apache Kafka service or a standalone Aiven for Apache Kafka Connect service, and each connector has an Aiven tab where automatic restart is switched on. The avn service connector commands in Aiven’s CLI documentation cover create, update, pause, resume, restart, restart-task and status, and the Aiven Terraform provider’s connector resource manages connectors as code. Aiven’s troubleshooting page notes that Terraform and the console share the same backend API.
Where it falls short. Access is set through Aiven’s organization, project and service roles, which decide who can manage a service rather than who may change which connector, and reading any connector’s configuration needs the same service:data:write permission as writing to the service’s data. Connectors are installed from Aiven’s pre-approved list, and others are requested through support. Clusters and Connect workers that are not on Aiven are outside it.
Rank 3 Kafbat UI
72 out of 110 Total
- Cost a year
- $0 licence, about $8,640 in operator time (modelled)
- On Aiven Connect
- The standalone service by REST URL, free; not Connect on the Kafka service
- Sign-in
- OAuth2, OIDC and LDAP, free
- Out of the data path ×3 weight, this criterion counts 3 times toward the total
- 9 out of 10
- Production access on request ×2 weight, this criterion counts 2 times toward the total
- 4 out of 10
- Audit trail per person ×2 weight, this criterion counts 2 times toward the total
- 6 out of 10
- Connector operations ×2 weight, this criterion counts 2 times toward the total
- 6 out of 10
- Directory and Kafka sign-in
- 7 out of 10
- Many teams, shared clusters
- 6 out of 10
Why these scores for Kafbat UI
- Out of the data path 9 out of 10
- It is one stateless container with no database and no proxy, the same pass as Kpow.
- Production access on request 4 out of 10
- RBAC grants actions per resource and a cluster can be set read-only, but there is no approval step, no time-boxed grant, and its masking applies the same way to every viewer.
- Audit trail per person 6 out of 10
- Its audit log names the logged-in user and records reads when the level is set to ALL, but it writes to a topic or the console with no view in the product, so reading the trail is something you build.
- Connector operations 6 out of 10
- It shows connector and task status, creates and edits connectors, and restarts a connector or its failed tasks, across several Connect clusters with free RBAC, but documents no auto-restart.
- Directory and Kafka sign-in 7 out of 10
- It supports OAuth2 and OIDC, including Microsoft Entra ID, and LDAP or Active Directory, and its documentation does not list SAML.
- Many teams, shared clusters 6 out of 10
- Roles scope permissions per resource and list the clusters they apply to, with no tenant view of a team’s own resources.
On Aiven Kafka Connect. Kafbat UI lists Connect clusters beside each Kafka cluster in its configuration, each with a URL and optional credentials, so the standalone Aiven service is one more entry, and its feature list covers Kafka Connect next to topic browsing, consumer groups and schemas. The Kafbat UI review covers its RBAC and release history in detail.
Where it falls short. Its main Restart button restarts the connector instance only, and failed tasks are restarted through a separate action. Nothing restarts a failed connector automatically, and there is no way to grant production access for an hour and have it expire or to hold a change for approval. Its modelled running cost on one cluster is 6 engineer-hours a month, $8,640 a year at $120 an hour.
Rank 4 AKHQ
62 out of 110 Total
- Cost a year
- $0 licence, about $8,640 in operator time (modelled)
- On Aiven Connect
- A list of Connect clusters per connection, with basic authentication
- Security default
- Disabled until you enable it
- Out of the data path ×3 weight, this criterion counts 3 times toward the total
- 9 out of 10
- Production access on request ×2 weight, this criterion counts 2 times toward the total
- 3 out of 10
- Audit trail per person ×2 weight, this criterion counts 2 times toward the total
- 4 out of 10
- Connector operations ×2 weight, this criterion counts 2 times toward the total
- 5 out of 10
- Directory and Kafka sign-in
- 6 out of 10
- Many teams, shared clusters
- 5 out of 10
Why these scores for AKHQ
- Out of the data path 9 out of 10
- It is one stateless container with no database and no proxy, the same pass as Kpow.
- Production access on request 3 out of 10
- Groups bind actions to resources by regex, but there is no approval step or time-boxed grant, masking is global, and without the JWT signing secret the restriction is in the UI only.
- Audit trail per person 4 out of 10
- Audit events are opt-in to a Kafka topic, reads are not recorded, and there is no view for the trail.
- Connector operations 5 out of 10
- It lists connector and task status and restarts a connector or a single task, with no failed-tasks-only restart and no auto-restart.
- Directory and Kafka sign-in 6 out of 10
- It supports LDAP, OIDC and header authentication from a proxy, does not list SAML, and ships with security disabled until you enable it.
- Many teams, shared clusters 5 out of 10
- Groups combine resource types with regex patterns on names and clusters, which limits what a role can reach, but there is no tenant view of a team’s own resources.
On Aiven Kafka Connect. AKHQ takes a list of Connect clusters under each Kafka connection, each with its own URL and optional basic authentication, which fits the standalone Aiven service, and shows connectors, their tasks and their configuration. The AKHQ review covers the rest.
Where it falls short. Security is off until you configure it, the audit trail is an opt-in topic that does not record reads, and a failed connector stays failed until someone restarts it. Its modelled running cost on one cluster is 6 engineer-hours a month, $8,640 a year at $120 an hour.
Compare Kpow vs AKHQAKHQ review
Rank 5 The Connect REST API and scripts
53 out of 110 Total
- Cost a year
- $0 licence, about $11,520 in operator time (modelled)
- On Aiven Connect
- The API the standalone service exposes and every tool here calls
- Security
- HTTPS with the service's basic authentication credentials
- Out of the data path ×3 weight, this criterion counts 3 times toward the total
- 10 out of 10
- Production access on request ×2 weight, this criterion counts 2 times toward the total
- 1 out of 10
- Audit trail per person ×2 weight, this criterion counts 2 times toward the total
- 2 out of 10
- Connector operations ×2 weight, this criterion counts 2 times toward the total
- 6 out of 10
- Directory and Kafka sign-in
- 3 out of 10
- Many teams, shared clusters
- 2 out of 10
Why these scores for The Connect REST API and scripts
- Out of the data path 10 out of 10
- There is nothing to deploy beyond the Connect service itself, which is the only option here besides the Aiven Console that scores 10.
- Production access on request 1 out of 10
- Anyone holding the service’s REST credentials can create, change or delete any connector, with no approval step, no expiring grant and no masking.
- Audit trail per person 2 out of 10
- Nothing ties a call to a person in the directory, because every script uses the same service credential.
- Connector operations 6 out of 10
- It has every operation, including restarting only the failed tasks and validating a config before it is submitted, but nothing watches the state, nothing restarts automatically, and each Connect service is a separate script target.
- Directory and Kafka sign-in 3 out of 10
- The standalone service serves the API over HTTPS with basic authentication, but there is no directory sign-in.
- Many teams, shared clusters 2 out of 10
- One URL reaches one Connect service with no notion of which team owns which connector.
On Aiven Kafka Connect. The Kafka Connect user guide lists the REST endpoints: connector and task status, POST /connectors/{name}/restart?includeTasks=true&onlyFailed=true to restart a connector’s failed tasks, a restart for an individual task, and PUT /connector-plugins/{type}/config/validate to check a config against the plugin’s definition. Aiven’s own guide to Connect logging levels uses the same API.
Where it falls short. It is a toolkit, not a tool: status has to be polled, failures noticed and restarts scripted, and the REST API grants all of it to whoever holds the service’s credentials. Its modelled running cost is 8 engineer-hours a month, $11,520 a year at $120 an hour.
Compare How to diagnose and fix a failed Kafka Connect connector
Rank 6 Conduktor
conduktor.io
69 out of 110 Total
- Cost a year
- 25 Console seats at $1,200 is $30,000 plus $2,880 operator time, so $32,880; Gateway Core adds $60,000 and Gateway Protect, which carries encryption and masking, a further $30,000 (modelled)
- On Aiven Connect
- Connect clusters by REST URL, task-level auto-restart with history, connector alerts
- Deployment
- Console on PostgreSQL 13+; data-level controls through Gateway, a proxy
- Out of the data path ×3 weight, this criterion counts 3 times toward the total
- 3 out of 10
- Production access on request ×2 weight, this criterion counts 2 times toward the total
- 6 out of 10
- Audit trail per person ×2 weight, this criterion counts 2 times toward the total
- 8 out of 10
- Connector operations ×2 weight, this criterion counts 2 times toward the total
- 9 out of 10
- Directory and Kafka sign-in
- 7 out of 10
- Many teams, shared clusters
- 7 out of 10
Why these scores for Conduktor
- Out of the data path 3 out of 10
- Console needs PostgreSQL 13 or later, and its encryption, data-level masking and Virtual Clusters only work when client traffic goes through Gateway, a proxy in the data path.
- Production access on request 6 out of 10
- Masking can exempt users or groups, which beats every other tool here on who sees unmasked data, and cross-team access requests are approved by the owning team, but no expiring grant is described and topic creation that passes policy is a direct API call.
- Audit trail per person 8 out of 10
- Console logs produce, consume and admin requests across more than 70 event types with user, IP and timestamp, browsable in the UI and exported as CloudEvents.
- Connector operations 9 out of 10
- Conduktor’s Kafka Connect documentation describes connector and task views, an offsets tab, built-in connector alerts, and an auto-restart that checks every minute and, for self-managed connectors, restarts only the failed tasks with a 10-minute window and a history of each restart, level with Kpow on this criterion.
- Directory and Kafka sign-in 7 out of 10
- Its SSO configuration covers LDAP and OIDC, with guides for Okta, Entra ID and Keycloak, and does not describe SAML.
- Many teams, shared clusters 7 out of 10
- Permissions are set per user or group across clusters, but a user in several groups inherits the most permissive grant, and Virtual Clusters for multi-tenancy need Gateway.
On Aiven Kafka Connect. Conduktor’s Console manages Connect clusters from its Kafka Connect page: create connectors from the installed plugin classes, pause, resume, stop, restart or delete one connector or several at once, view committed offsets, set alerts, and enable auto-restart, which captures each failed task’s error message before restarting it. Aiven’s guide for Conduktor covers the Kafka connection. The Conduktor review covers the rest.
Where it falls short. Console needs PostgreSQL. Conduktor’s data-level controls, such as encryption, masking of the data itself and virtual clusters for multi-tenancy, run in Gateway, a Kafka proxy that client applications connect through, and Connect workers are Kafka clients too, so routing them through Gateway puts it in front of every connector’s reads and writes. On AWS Marketplace, Conduktor Enterprise lists Console at $1,200 a seat for the first 100 seats, Gateway Core, which carries virtual clusters, at $60,000 a year, and Gateway Protect, the add-on for encryption and masking, at a further $30,000.
Compare Conduktor review
What teams on Aiven Kafka Connect need
This page is about tools that sit beside Aiven for Apache Kafka Connect, Aiven’s managed Kafka Connect, and specifically the standalone Connect service rather than Connect running on the Kafka nodes. Aiven’s documentation presents Connect on the Kafka nodes as a low-cost way to start, and a standalone service as the way to take load off the Kafka nodes and scale Connect on its own; on Aiven’s Standard Kafka services, Connect has to run as a dedicated service, as Aiven’s Connect setup guide notes. The standalone service is also the one that exposes the standard Kafka Connect REST API, which is what every third-party tool on this page calls. For the brokers, Karapace and the rest of the Aiven service, the companion page is best Kafka tools for Aiven for Apache Kafka, and for Connect on any distribution, best Kafka tools for Apache Kafka Connect.
Out of the data path. Every Connect task is an ordinary Kafka producer or consumer, and the worker configuration passes producer. and consumer. settings through to those clients, as the Kafka Connect configuration reference shows. On Aiven those clients are the standalone service’s nodes, one on a Startup plan, three on Business and six on Premium according to Aiven’s logging guide, and they reach the Kafka service through Aiven’s own service integration. A tool whose controls work only when client traffic passes through a proxy would have to sit in front of those connections too, while a tool that reads the REST API and Kafka as an ordinary client changes nothing about how the connectors run.
Production access on request. Connector configurations are where the credentials live: database passwords, cloud keys and the Karapace credentials a converter needs. The improvement proposal that added config providers to Kafka Connect, KIP-297, states that connector configurations hold plaintext passwords, that Connect stores them in cleartext in its internal topics, and that the REST API exposes them over unsecured connections. Aiven draws the same line in its roles and permissions documentation: the read-only role cannot view Kafka Connect connector configurations, and viewing them needs the data access permission, because they can contain secrets in plain text. Granting someone the right to read a connector’s configuration on Aiven is therefore a grant of data access, which is why it belongs behind an expiring grant or an approval, and why a tool that redacts sensitive values while a config is edited, as Kpow’s Kafka Connect management does, narrows what that access shows. Aiven’s secret providers, for AWS Secrets Manager, Azure Key Vault, HashiCorp Vault and environment variables, take the secrets out of the configuration altogether, and are the stronger fix where the connector supports them.
Audit trail per person. A tool calls the standalone service’s REST API with one set of basic authentication credentials, so the service cannot tell the engineers working through it apart, and the record of who restarted a connector or changed its config has to come from the tool. On Aiven that record also has a retention question: plans that cap topic retention reject a topic kept forever, which is why Kpow’s Aiven documentation has teams create its __oprtr_audit_log topic with a finite retention on those plans. The trail on the cluster then lasts as long as the plan allows, and Kpow’s webhooks send each event to a SIEM or chat channel for anything longer. The options are compared in Kafka audit logging tools.
Connector operations. Aiven’s automatic restart is a per-connector setting, and Aiven’s own guide to it warns that it restarts the entire connector, not only the failed tasks, and is not recommended for recurring failures because the connector may keep failing until the cause is fixed. Restarting only what failed is part of the Connect API since KIP-745, which added the includeTasks and onlyFailed options, so a tool that reads task state and calls those options does less damage to the healthy tasks than a whole-connector restart. Debugging on a multi-node service has its own catch: Aiven’s logging guide warns that a log level changed through the REST API applies only to the node that received the request, so on a three-node Business plan the change has to be repeated on each node; Apache Kafka later added a cluster-wide scope to that endpoint in KIP-976, so the behaviour a team sees depends on its Connect version. Aiven also installs connectors from a pre-approved list and evaluates others on request for licence, implementation and maintenance, so a create form that lists the plugins actually installed on the service saves a failed submission.
Directory and Kafka sign-in. A tool for Aiven Connect holds two connections: to the Kafka service with SASL/SCRAM, OAuth/OIDC or the client certificate files Aiven issues, and to the Connect service’s REST API over HTTPS with its own basic authentication user. Java clients long needed keytool to turn those PEM files into a keystore, until KIP-651 added PEM support, and Kpow reads the files as downloaded. People then sign in through the company directory over SAML, OpenID Connect or LDAP, so a connector change is tied to a named person rather than to the service credential.
Many teams, shared clusters. Aiven grants roles and permissions per organization, project or service, so one standalone Connect service is one permission boundary: a team can have a Connect service of its own, but inside a shared one the documentation describes no permission per connector. Aiven’s open-source connectors, such as the cloud storage connectors for S3, GCS and Azure Blob Storage and the JDBC connector, are Apache 2.0 projects that also run on self-managed Connect, so a team can end up with the same connector on Aiven and on its own workers. A tool that gives each team its own view of its own connectors, usually by name prefix, and reaches more than one Connect cluster from one deployment covers both.
No tool here leads on every point. The Aiven Console needs nothing deployed and is the only option that manages connectors on both kinds of Aiven Connect, and Conduktor is level with Kpow on connector operations, restarting only the failed tasks automatically and keeping a restart history. Kpow does not reach Connect running on the Kafka service, documents Aiven’s Classic Kafka service only, and governs people working through Kpow, so the REST API remains open to anyone holding the service’s credentials, and keeping those credentials close stays a job for the team.
Quality innovation coming to [open source] Apache Kafka from the team at Aiven recently. Firstly Diskless Topics with KIP-1150 and now Iceberg Topics introduced via Kafka's Tiered Storage Path, avoiding the need for a KIP entirely. These are big features, they are also analogous to ones provided by managed service providers like Confluent.
Derek Troy-West, Co-founder and CEO of Factor House
How a team runs Aiven Kafka Connect with Kpow
Choosing the service type. Kpow needs the standard Kafka Connect REST API, which only Aiven’s standalone Connect service exposes, so connectors that Kpow should manage run on a standalone service rather than on the Kafka nodes (Kpow’s Aiven documentation). Aiven’s own documentation lists a guide, “Use Kpow with Aiven for Apache Kafka”, among its tools for the service, describing Kpow as supporting the managed Kafka service, Karapace and the standalone Connect service.
Linking the service before the first start. Creating a standalone Connect service is not enough: it has to be linked to the Kafka service in the Aiven Console under Manage Integrations, or Aiven answers the REST API with 503 Service Unavailable. Kpow validates each Connect cluster at startup by default (CONNECT_STARTUP_VALIDATION, in the Kafka Connect configuration), so a missing integration shows up as a failed start rather than as an empty Connect view.
Installing it beside the service. Kpow runs as one Docker container, a Java JAR or from the Helm charts, in your own cloud account or data centre. It needs no external database, because its snapshots, metrics and audit log live in topics on the Aiven Kafka service, and on plans that cap retention the audit topic is created first with a finite retention.
Connecting Kafka, Karapace and Connect. The Kafka service is reached with SASL/SCRAM, mutual TLS from ca.pem, service.cert and service.key with the key and certificate combined into one file, or OAuth/OIDC; Karapace with its URL and basic authentication; and the Connect service with CONNECT_NAME, CONNECT_REST_URL, CONNECT_AUTH=BASIC, CONNECT_BASIC_AUTH_USER and CONNECT_BASIC_AUTH_PASS (Kpow’s Aiven documentation). A self-managed Connect cluster running the same Aiven connectors is added beside it with CONNECT_RESOURCE_IDS.
Creating and editing connectors. The create form lists the plugins installed on the service, shows each plugin’s documentation beside its fields and displays form errors as the config is entered, and the finished connector can be deployed directly or exported as a REST call for a deployment pipeline. When a config is edited, sensitive values appear redacted and are not sent in plain text, and without CONNECT_EDIT the form is read-only (Kafka Connect management).
Triage when a connector fails. The connector page shows connector and task state side by side; a failed task’s latest stack trace opens from the task table and the task restarts from the same row, so only the failed task is restarted rather than the whole connector. For a sink connector the view links to the consumer group it reads through, so lag and task state are read together.
Restarting failed connectors automatically. With CONNECT_AUTO_RESTART set to a list of connector names or wildcards, Kpow restarts failed connectors and their failing tasks, waits 10 minutes by default before trying the same connector again (CONNECT_AUTO_RESTART_WINDOW_MS) and restarts at most 50 connectors per one-minute interval (CONNECT_AUTO_RESTART_LIMIT). Each automatic restart is written to the audit log, so a connector that was revived overnight shows up as such the next morning. Leaving Aiven’s own automatic restart off for those connectors keeps one mechanism, and one record, in charge.
Deciding who may do what. Kpow’s authorization actions split Connect into CONNECT_CREATE, CONNECT_ALTER_STATE (pause, stop, resume and restart), CONNECT_EDIT_CONFIG, CONNECT_DELETE and CONNECT_INSPECT, and RBAC sets Allow, Deny or Stage per action on resources matched by pattern, so the on-call engineer can restart a connector while a config change waits for a second person. Temporary policies give production access for a fixed window, staged mutations hold a change for approval, and tenants give each team its own connectors on a shared service.
Signing people in and keeping the record. Engineers sign in through SAML, OpenID Connect or LDAP, so every connector action carries a person from the company directory. Kpow exports connector state counts, including connect_connector_failed_total and connect_connector_task_failed_total, to Prometheus, so a failed task is one Alertmanager rule, and Aiven exposes its own Connect worker metrics to Prometheus beside them.
Kpow live demo
See the Kpow UI before you connect your Aiven Connect service
The live Kpow demo runs on two Amazon MSK clusters rather than Aiven, and shows the views a team gets on Aiven too: brokers, topics, consumer groups, a Kafka Connect cluster and schema registries, with no signup. Connecting your own standalone Aiven Connect service is the step to try next.
For platform teams choosing a tool for Aiven Kafka Connect.
Try the Kpow demoFAQ
What is the best tool for Aiven Kafka Connect?
On this page’s rubric, Kpow, with 99 of 110 points: it reaches Aiven’s standalone Connect service alongside the brokers and Karapace, shows connector and task state with stack traces, restarts single tasks and auto-restarts failed connectors with a cap and an audit entry, redacts sensitive config values, splits connector permissions per action and per team, and runs as one container with no external database. The Aiven Console is next at 75 with nothing to deploy, and Kafbat UI is the highest-scoring free tool you run yourself, at 72.
Does Kpow support Aiven Kafka Connect?
Yes, the standalone Aiven Connect service. Kpow connects to it through the Connect REST API with CONNECT_REST_URL and basic authentication, as Kpow’s Aiven documentation shows. Connect running on the Kafka service itself is not supported, because Aiven does not expose a REST URL for it.
Why does Kpow fail to start against Aiven Connect?
The usual cause is a standalone Connect service that has not been linked to the Kafka service under Manage Integrations in the Aiven Console, in which case Aiven returns 503 Service Unavailable and Kpow’s startup check fails. On plans that cap retention, a second cause is the audit topic, which has to be created with a finite retention before the first start.
Should I turn on Aiven’s automatic restart?
Aiven describes it as a help for rare transient failures, such as an out-of-memory error during a sudden surge, and warns that it restarts the entire connector and is not recommended for recurring failures. If Kpow’s auto-restart is used for the same connectors, keeping only one of the two avoids two mechanisms restarting the same connector.
Who can see connector passwords on Aiven?
Aiven’s roles and permissions documentation says the read-only role cannot view connector configurations, and that viewing them needs the service:data:write permission because they can contain secrets in plain text. Secret providers keep the secrets out of the configuration, and Kpow redacts sensitive values when a config is edited.
Is there a free Kafka UI for Aiven Kafka Connect?
Kpow Community Edition is free on up to 3 clusters and 10 users. Kafbat UI and AKHQ are open source and both manage Connect clusters by REST URL, which covers the standalone Aiven service. RBAC, masking, staged approvals and the full audit log need Kpow Enterprise. More free options are compared in the best free Kafka UI tools.
How these tools were scored
The six criteria are the ones on best Kafka tools for Apache Kafka Connect, with the same weights, and every tool that page also ranks keeps its score there on each criterion. They are listed here in order of weight. Each criterion is scored 0 to 10: 10 where a tool is the only one here doing it or clearly the best, 8 for a clean documented pass, 5 or 6 for partial support or support that needs work the reader must verify, 1 to 4 for a weak or indirect form, and 0 where it is missing. The total is each score times its weight, out of 110.
1. Out of the data path (counts three times). The tool should run in your own environment, reach Kafka as an ordinary client and Connect through its REST API, and keep no data outside your own cluster. Scored lower: tools that need an external database of their own, and tools whose controls work only when application or connector traffic passes through a vendor’s proxy. A self-hosted container with no external database and no proxy scores 9; the Aiven Console and the REST API, with nothing to deploy, score 10.
2. Production access on request (counts twice). Whether an engineer can be granted access to production for one task and have it expire, whether a destructive change can be held for a second person’s approval, and whether sensitive fields and config values can be kept from people who do not need them.
3. Audit trail per person (counts twice). Whether the tool records each action, reads included, against the person from the identity provider, and whether that record can be read in the product and sent to the systems that keep it long term.
4. Connector operations (counts twice). Whether the tool shows task state with stack traces, restarts a connector, a task or only the failed tasks, restarts failed connectors automatically with a limit, creates and validates connectors, and reaches several Connect clusters.
5. Directory and Kafka sign-in (counts once). Whether people sign in through SAML, OpenID Connect or LDAP, and whether the tool connects to Aiven Kafka with the methods the service enables and to the Connect REST API over HTTPS with authentication.
6. Many teams, shared clusters (counts once). Whether each team can be given its own view of its own topics, consumer groups and connectors on a shared service, and whether one deployment reaches several clusters.
Costs are modelled for one production Kafka cluster with its Connect service and 25 engineers at $120 per engineer hour, using the same hours per tool class as Factor House’s other comparison pages. The Aiven Connect service itself is billed by Aiven whichever tool is used, so it is left out. Tools with a licence carry the published price plus 2 hours a month to run. The open-source UIs carry 6 hours a month, $8,640 a year, to run, secure and keep current, scripts against the REST API carry 8 hours a month, $11,520, and the Aiven Console carries nothing. Kpow’s $7,380 uses the published price of $4,500 per Kafka cluster a year with 100 users included.
The criteria map onto how Aiven runs Kafka Connect in the figure below.
Every option is scored from 0 to 10 on each criterion, from the evidence and sources this page cites, and the reason for each score is on its card. The criteria are weighted: Out of the data path counts three times, Production access on request counts twice, Audit trail per person counts twice, Connector operations counts twice, Directory and Kafka sign-in counts once and Many teams, shared clusters counts once, for a total out of 110. Out of the data path counts three times. Every Connect task on an Aiven Connect service is itself a Kafka producer or consumer, so a tool whose controls work through a proxy sits in front of every connector's reads and writes as well as the applications', and a tool that needs a database of its own is one more stateful service to run beside a managed one. Production access on request, the per-person audit trail and connector operations count twice: Aiven's own roles treat a connector's configuration as data because it can hold secrets in plain text, so who may read or change it, and who did, decide whether a shared tool can be pointed at production Connect at all, and a tool that cannot read task state and restart the right thing leaves the team on the console or curl. Directory and Kafka sign-in, and shared clusters, count once. This page is published by Factor House, which makes Kpow. Every option is scored on the same rubric and the same sources: Kpow's per-criterion scores are set the same way as every other option's and are not adjusted, and the weights apply to every option alike. Kpow ranks first on its total of 99 out of 110. The other options follow by total. Conduktor is listed last whatever its total; on its total of 69 it would place fourth.