Doesn't ZeroSSL do this? acme.sh has been using it as the default for the last few years. As I understand it, it basically offers the same as Let's Encrypt.

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ZeroConcerns 27 minutes ago | parent [-]

https://zerossl.com/pricing/ suggests a 3-cert limit on the free tier, as well as a huge influx of expected spam...

	▲	arp242 23 minutes ago \| parent [-]
		I think that refers to something else (manual non-acme certificates)? Many other pages says it's unlimited. E.g. https://zerossl.com/documentation/acme