It was mentioned elsewhere, but Bluehost requires purchasing a dedicated IP for any personalized SSL/TLS support. There is no direct support for Let's Encrypt, as far a I am aware.
Do you know Nitrado? Would be cool if Nitrado also support Let's Encrypt.nitrado.net
GearHost has this planned and in the works right now. Our proposed release date will be 2nd QTR 2017 so in a few months.
We offer Let's Encrypt on all of our servers (Shared, and Managed Cloud).
8ackProtect supports automated requests and renewal of LE-Certificates sind 2017-01-10. It's completely tested and already activated for various Clients
Here is the News-Link (in german)
Here is the documentation-link (in german)
GoogieHost has support for LE, now! https://googiehost.com
JV Internet Solutions just got support for LE, available for all shared hosting plans.
News link in Dutch
A host that use LE is Intel planet
Vimexx supports LE with shared hosting via a DirectAdmin plugin.
Just an FYI, HoartPapa supports LE.
Fornex.com is also supports Let's Encrypt.
I didn't see it in the list so I figured I would add it myself.
Glowhost.com supports Let's Encrypt but it appears to only be via support requests. They said they will automatically renew as well.
Please note, hostpapa.ca now supports Lets Encrypt. I contacted HP support yesterday, Jan. 30, 2017, and they set it up for me. My main site and all subdomains have valid SSL certs that expire in 64 days...
XpresServers.com and XpresServers.pk now offers Let's Encrypt certificate through cPanel's automated system and Plesk's extension based system.
https://www.redhost.dk also supportsThere is no statement, but this websitehttps://www.lungemedicin.dkHas it through them.
Hosting Ergonet now provides full Let's Encrypt SSL generation and automatic updating on shared and dedicated hosting.
In Brazil, InVettor Hospedagem de Sites Provider already offers the plugin in the Cpanelhttp://blog.invettor.com.br/como-gerar-um-certificado-ssl-gratuito-no-cpanel/
ASPIFY.com -> ASP.NET webhostnig -> https://www.aspify.com provides full support for Let's Encrypt SSL certificates on shared webhosting, virtual private servers and dedicated server.
NationalNet provides full support for LetsEncrypt and have for months. http://nationalnet.com