[inshadows]

Hopefully, LetsEncrypt is and will always be incorruptible organization. There was never a case of a community project being taken over by greedy capitalists. Oh wait...

[johnnyapol]

I personally have put a lot of faith in them but there's also a lot of alternatives in case they were to flop or become corrupted:

1.https://zerossl.com/letsencrypt-alternative/

2. Cloudflare will issue you free TLS certs (assuming you're okay with them doing TLS termination). I assume other CDNs / caching proxies with free plans will also do this.

3. https://www.buypass.com/ssl/products/acme

4. https://www.sslforfree.com/

I'm sure there's more, but that's just what I could quickly find.

[remram]

There are a lot of safeguards like certificate transparency logs. They would be caught.