I'm looking for RPC Providers that has a Free tier and has some good limits (daily limits, and requests per second). For Polygon's mainnet. I'm aware of Quicknode, Alchemy, Infura and Ankr. I know there are some public ones too like drpc and allnodes, but looking for other ones.
Try Crouton Digital. Been using their RPC for Polygon lately. Pretty solid. Not sure about the exact RPS on free tier, but I haven't been throttled yet. Dashboard is simple, easy to track stuff. They support a ton of other chains too. Worth a quick test.