I've been following this lot for a while, but recently we took the plunge and are using them on our corporate sites - they are great and FREE.
So, anyone (assuming you're on a sensible ISP) can have free SSL/TLS/SSH certificates. I'm also having them used to provide proper, rather than self-signed, certificates for all our SSH kit, i.e. routers/firewalls/internal servers etc.
What Nick sent to his web team wrote: Guys,
Interesting initiative by the Linux Foundation – free certificates… see https://letsencrypt.org/ & https://letsencrypt.org/docs/faq/
They’ve been running since 2016 are and a global CA recognised by all major browsers. Next year they’ll be offering wildcard certificates too.
Means we can have proper certs for SSH etc. internally, not just self-signed ones which are pretty rubbish.
People have managed to use these certs on GoDaddy and others – there is a list of ISPs who actively support Lets Encrypt too, however a lot of ISPs rely on charging silly money for certs when you can get them for free now – 100,000,000+ so far have been issued – they’re issuing about 500,000 per day… https://letsencrypt.org/stats/