Let's Encrypt (@letsencrypt) — Twitter Score 19 out of 1000

Let's Encrypt is a free, automated, nonprofit Certificate Authority operated by the Internet Security Research Group that issues trusted TLS certificates enabling HTTPS at no cost. Let's Encrypt's Twitter Score is 19 out of 1000 as of August 2026, ranking #51,409 among 483,944 tracked accounts.

Let's Encrypt was founded by Josh Aas, Eric Rescorla, J. Alex Halderman, and Peter Eckersley, and is backed by Mozilla, the Electronic Frontier Foundation, Cisco, Akamai, and IdenTrust. As a Section 501(c)(3) nonprofit, it is funded entirely by contributions from organizations and individuals. Its certificate-authority software, Boulder, is written primarily in Go.

Let's Encrypt issued its first certificate in September 2015 and reached one billion certificates issued in February 2020. As of December 2025, it described itself as the world's largest certificate authority by certificates issued and said it was approaching protection of one billion websites. Let's Encrypt also played a central role in developing the ACME protocol, which became an IETF standard in March 2019. Looking ahead, Let's Encrypt has announced a transition that will reduce its default certificate lifetime from 90 days to 64 days and eventually to 45 days.

Let's Encrypt maintains an active presence on Twitter with 84,089 followers as of August 2026 and 4,967 posts. It has been mentioned by 150 accounts a total of 621 times.

Who follows Let's Encrypt on X?

The accounts that follow Let's Encrypt include 111 founders, 21 angel investors and 22 influencers. Among them are Balaji, Udi Wertheimer, Matthew Graham, Zmanian, Albert Wenger and Juan Benet.