For an alternative to airplane.dev, you can checkout Windmill.

https://github.com/windmill-labs/windmill

"Open-source developer infrastructure for internal tools (APIs, background jobs, workflows and UIs). Self-hostable alternative to Airplane, Pipedream, Superblocks and a simplified Temporal with autogenerated UIsm and custom UIs to trigger workflows and scripts as internal apps.

Scripts are turned into sharable UIs automatically, and can be composed together into flows or used into richer apps built with low-code. Supported script languages supported are: Python, TypeScript, Go, Bash, SQL, and GraphQL. "

If you search HN, you'll find the creator of Windmill comment on comparisons to airplane.dev:

https://hn.algolia.com/?dateRange=all&page=0&prefix=false&qu...