Calimai

Calimai was created after several months of internal development and instead of using it privately, we chose to open the yielding benefits to wider audiences. A point worth mentioning is that the permissiveness of decentralized exchanges was a fundamental feature for the evaluation and testing of our trading algorithms.

A free tier will definitely increase your user base. For example, 1 template and 1 AI-contract review/month along side API rate limits.

The site says "Start free, scale as you grow" but doesn't state the pricing of paid services without registration.