I'm trying to switch from Heroku to Render but it is awfully slow compared to Heroku, my Rails project takes something like 1 minute to start after it has been shut down gratefully. Moreover, it breaks the CSS assets and uses the older assets instead of the latest ones. I do not why, it is a really small project and I have none of these issue on Heroku
Sorry about that. It sounds like you're on the free plan which is somewhat underpowered vs Heroku right now. Still, definitely not the experience we hope to provide and I'd love to learn more. Email in profile.
I recently moved some apps over to Render and I've been loving it so far. Ease of use with Heroku with some "infrastructure as code" style YAMLs (they're called blueprints). Performance is about the same and cost nearly halved.
I can only speak about render.com as I use for a mix of 10 static websites / Go webapps + cloudflare for DNS and caching proxy.
It sounds prosaic but "it just works".
Specifically compared to Digital Ocean Apps (which I used before render):
* the dashboard UI is better designed and faster
* the builds and deployments happen faster
* similar price (to Digital Ocean, much cheaper than Heroku)
* similar capabilities (attached disks, hosted Postgres, hosted redis) but the velocity seems better i.e. render.com seems to implement features faster than DO
You would think that "well designed dashboard that displays instantly" would be a table stakes in an offering like that, but sadly it isn't.