Oak, a Free and Open Certificate Transparency Log

“Sectigo is proud to sponsor the Let’s Encrypt CT Log. Finally, Let’s Encrypt often issues more than 1M certificates each day, so we wanted to design a CT log that is optimized for high volume. We’d like to thank Google, Sectigo, Cloudflare, and DigiCert for also running open logs, and we look forward to contributing to better transparency in Web security!

Source: letsencrypt.org