Is there a significant difference between this and nginx proxy manager?
They're both reverse proxies built on nginx, but the whole point of BunkerWeb is that it's a WAF, which NPM is not, so that's a significant difference.
In short, NPM doesn't do any of the stuff listed under Security Features here: https://docs.bunkerweb.io/latest/#security-features
NPM will automate Let's Encrypt certificate generation but you're right about the other listed features.
They're both reverse proxies built on nginx, but the whole point of BunkerWeb is that it's a WAF, which NPM is not, so that's a significant difference.
In short, NPM doesn't do any of the stuff listed under Security Features here: https://docs.bunkerweb.io/latest/#security-features
NPM will automate Let's Encrypt certificate generation but you're right about the other listed features.