[Sanzig]

Bunny.net? Doesn't have near the same feature set as Cloudflare, but the essentials are there and you can easily pay as you go with a credit card.

[slothsarecool]

Their WAF isn't there yet, the moment it can build the expressions you can build with CF (and allows you to have as much visibility into the traffic as CF does), then it might be a solid option, assuming they have the compute/network capacity.