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Celery

C
C tier on Task Queue SoftwareScore 6.9 · #6 of 37
Android app
Not listed
Free plan
Yes
Runs on
api, Linux, Mac, self-hosted
docs.celeryq.dev
The Celery homepage
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Summary

Celery is a free, open-source distributed task queue for real-time processing that also supports scheduled work. It sends task messages through a broker to worker processes for execution; systems can use multiple workers and brokers for high availability and horizontal scaling. Celery Beat starts tasks at regular intervals for available worker nodes. Documented transports include RabbitMQ, Redis, Amazon SQS, Kafka, and Google Pub/Sub, with different capability notes: RabbitMQ and Redis are stable, SQS is stable without monitoring or remote control, and Kafka is experimental without those capabilities. Celery documents integrations for Django, Pyramid, Pylons, Flask, web2py, Tornado, and FastAPI. Commands can inspect and manage worker nodes, and monitoring options include Flower and event utilities. Celery 5.6 supports Python 3.9 through 3.13 and PyPy 3.9 or newer. It is self-hosted under the New BSD License. The project advises restricting broker access because Celery should be treated as unsafe; supported broker backends can use SSL encryption and authentication. Windows is not officially supported, though it may work.

Who it is for

Celery suits developers who need a self-hosted task queue for real-time processing or scheduled jobs, particularly those using its documented broker or web framework integrations. It may suit teams prepared to manage broker access and worker infrastructure.

What is good

  • Supports real-time processing and scheduled tasks
  • Multiple workers and brokers enable scaling
  • Documents several broker transports
  • Worker inspection and monitoring options are available
  • Free and open source under New BSD License

What to know first

  • Windows is not officially supported
  • Kafka is experimental without monitoring or remote control
  • SQS lacks monitoring and remote control

Verdict

Celery provides task execution and scheduling through brokers and worker processes, with documented integrations and monitoring options. Check broker-specific limitations and plan for secure, self-hosted operation.

Celery plans and pricing

All plans
Celery Free Open-source distributed task queue · install via PyPI or from source docs.celeryq.dev · 4 Oct 2026

Compared on task queue software

Deployment model
self_hosteddocs.celeryq.dev
Custom retry policy
Yesdocs.celeryq.dev
Scheduled jobs
Yesdocs.celeryq.dev
Dead-letter queue
Yesdocs.celeryq.dev
Official SDK languages
Pythondocs.celeryq.dev

Facts

Purpose
Celery is a distributed task queue focused on real-time processing that also supports task scheduling.docs.celeryq.dev · 4 Oct 2026
Task processing
Celery sends task messages through a broker, which delivers them to worker processes for execution.docs.celeryq.dev · 4 Oct 2026
Scaling
A Celery system can use multiple workers and brokers to support high availability and horizontal scaling.docs.celeryq.dev · 4 Oct 2026
Scheduling
Celery Beat starts tasks at regular intervals for execution by available worker nodes.docs.celeryq.dev · 4 Oct 2026
Broker integrations
Documented message transports include RabbitMQ, Redis, Amazon SQS, Kafka, and Google Pub/Sub.docs.celeryq.dev · 4 Oct 2026
Broker limits
The documentation marks RabbitMQ and Redis stable, SQS stable without monitoring or remote control, and Kafka experimental without either capability.docs.celeryq.dev · 4 Oct 2026
Web framework integrations
Celery documents integrations for Django, Pyramid, Pylons, Flask, web2py, Tornado, and FastAPI.github.com · 4 Oct 2026
Monitoring
Celery provides commands to inspect and manage worker nodes and documents monitoring tools including Flower and event utilities.docs.celeryq.dev · 4 Oct 2026
Security
Celery advises treating it as an unsafe component and recommends restricting broker access; supported broker backends can use SSL encryption and authentication.docs.celeryq.dev · 4 Oct 2026
Supported runtime
Celery 5.6 runs on Python 3.9 through 3.13 and PyPy 3.9 or newer.github.com · 4 Oct 2026
Windows support
The project says Windows is not officially supported, although it may work.github.com · 4 Oct 2026
Support channels
The project points users to its mailing list, IRC channel, issue tracker, and community resources for help.github.com · 4 Oct 2026
License
Celery is open source and licensed under the New BSD License.docs.celeryq.dev · 4 Oct 2026

Best Celery alternatives

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Btier IronWorker #1 7.2 $169/moBtier Faktory #2 7.1 $99/moBtier Hangfire #3 7.1 $41.67/moBtier pg-boss #4 7.1 FreeBtier Inngest #5 7.0 $99/moCtier JobRunr #7 6.9 €100/mo

Where it ranks on Everything Xiaomi

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