Besides trystero which is great but depends on things I cannot get into our company, anything open source? I cannot get this into our company either as it's vit

Besides trystero which is great but depends on things I cannot get into our company, anything open source? I cannot get this into our company either as it's vital infra and as such needs to be replaceable with open source at will. We have that as a rule. The only things that are exceptions are necessary evil; payments & cloudflare (bot-fight specifically).