{"data":{"slug":"celery","name":"Celery","tagline":"BSD-3-Clause distributed task queue for Python, on RabbitMQ or Redis","category":"python","categoryName":"Python","url":"https://docs.celeryq.dev","github":"https://github.com/celery/celery","pricing":"open-source","hook":"Celery runs Python functions as background jobs on worker processes, with retries, scheduled (beat) tasks and chains of tasks, using RabbitMQ or Redis as the broker.","whatsGood":"BSD-3-Clause (celery/celery), stable 5.6.3 (2026-03-26), 5.7.0rc1 (2026-10-18), commit on 2026-10-20. ★~29k, developed since 2009. Useful for the classic web-app jobs, such as emails, reports and image processing, especially next to Django.","theCatch":"You run and tune a broker, and the delivery settings (acks, prefetch, visibility timeout on Redis) are a common cause of duplicated or lost tasks. Windows is not officially supported. For long multi-step workflows a durable engine like Temporal or Hatchet fits better. GitHub shows NOASSERTION only because the LICENSE file has extra text; it is BSD-3-Clause.","verdict":"The default Python job queue; read the delivery docs before going to production.","addedAt":"2026-10-21","featured":false,"domain":"Python","subSpecialty":"Python","subcategory":"Jobs","tags":["self-host","workflows","active"],"capabilities":[],"surfaces":["Self-host"],"ecosystem":["Python"],"licenseModel":"BSD-3-Clause","githubStars":29027,"starsPerWeek":32,"access":"free","archived":false,"repo":{"createdAt":"2009-04-24","pushedAt":"2026-10-20","license":"NOASSERTION","archived":false,"checkedAt":"2026-10-21"}},"related":[{"slug":"fastapi","name":"FastAPI","tagline":"Modern Python APIs at startup speed"},{"slug":"pydantic","name":"Pydantic","tagline":"Data validation using Python type hints"},{"slug":"uv","name":"uv","tagline":"Python packaging at Rust speed"},{"slug":"ruff","name":"Ruff","tagline":"Python linter faster than your test suite"},{"slug":"polars","name":"Polars","tagline":"DataFrames that respect your CPU"}],"links":{"self":"/api/gems/celery","html":"/gems/celery","markdown":"/gems/celery.md","category":"/api/gems?category=python","categoryPage":"/stacks/python"}}