I recommend [Celery](https://docs.celeryq.dev/en/stable/). Celery is a simple, flexible, and reliable distributed system to process vast amounts of messages, while providing operations with the tools required to maintain such a system.
BTW its free.
I believe the OSS part of this oban library covers a lot of the celery feature set and is free as well. You can run multiple nodes and knock yourself out without needing more infra than the existing postgres.
Oban has been a free and OSS project in Elixir for ages. There are some more advanced bits that are paid and that sustains the people that make it.
If you like Celery. Great. This is a different take. I didn't enjoy celery last I needed it but never got super familiar.
How many people tried to pitch their own tool in this thread? We love that the article, discussions and the process has taught us more about what might need to be incorporated into the OSS version for Py. Once a feature is out there you can't retract it. It's v0.5 for this reason!
Free is good. We choose better. Free waits or competes with initial work priorities. We strive for zero open issues and real humans responding when you can't ship.