Spooled is a high-performance, multi-tenant job queue system designed for reliability, observability, and horizontal scalability.
Cost / License
- Free
- Open Source (Apache-2.0)
Platforms
- Self-Hosted
- Docker

Zeplo is described as 'Lets developers add retry, delay, queue and schedule to HTTP endpoints without setting up Redis, RabbitMQ or SQS. Just prefix any HTTP endpoint with zeplo.to/ and the request is queued' and is an app in the development category. There are more than 10 alternatives to Zeplo for a variety of platforms, including Linux, Windows, Mac, Self-Hosted and Web-based apps. The best Zeplo alternative is Intent Bus, which is both free and Open Source. Other great apps like Zeplo are RabbitMQ, Apache Pulsar, Zenaton and Amazon Simple Queue Service.
Spooled is a high-performance, multi-tenant job queue system designed for reliability, observability, and horizontal scalability.

Celery is an asynchronous task queue/job queue based on distributed message passing. It is focused on real-time operation, but supports scheduling as well.