Is there a service that provides something like Heroku’s PR deployments in a free tier (for open source development)?

While Heroku was out I took a look at Fly.io and Render.com but neither one quite fits the same use case.

Fly does not have automated PR builds and Render does have them but they all use the same database instance and you can’t have more than one active free database (so multiple PRs affecting the database are not possible).

I actually switched to Render before realizing that limitation. It was easy to do and works well but now that Heroku has their integration working again I’m thinking I’m just going to switch back…