The code is available for free and you can host it on your own Cloudflare account. Cloudflare provides a free plan (up to 100k daily requests across all your Workers), and paid plan ($0.50 per 1m requests)
Launched Widgetery.com (A Product Hunt-like widget for lead capturing) yesterday. Still have to learn a lot of things on making such kind of widgets, however it was really fun to build. By the way, any feedback is appreciated!