If I think about it, I find it awful. The fact that we need to put junk in our own stuff just for crawlers does not sit well with me.

First time seeing that, but yes, seems similar in concept. Iocaine can be self-hosted and put in as a "middleware" in your reverse proxy with a few lines of config, cloudflare's seems tied to their services. Cloudflares also generates garbage with generative models, while iocaine uses much simpler (and surely more "crude") methods of generating its garbage. Using LLMs to feed junk to LLMs just makes me cry, so much wasted compute.

Is iocaine actually newer though? Its first commit dates to 2025-01, while the blog post is from 2025-03. I couldn't find info on when Cloudflare started theirs. There's also Nepenthes, which had its first release in 2025-01 too.