It'd be quite difficult to find a truly equally feature-rich alternative. Not many, if any, exist. Fastly, Sucuri, Imperva, etc all suck and Akamai is too expensive for average indie dev. 

Fortunately, their CEO seems fairly rational compared to others in big tech. Worth a read.

https://www.theverge.com/24121399/cloudflare-matthew-prince-internet-free-speech-8chan-ukraine-aristotle-decoder-interview