A nonprofit Certificate Authority providing TLS certificates to 225 million websites.

Read our 2020 Annual Report

From our blog

  • The Next Gen Database Servers Powering Let's Encrypt

    Database performance is the single most critical factor in our ability to scale while meeting service level objectives. In late 2020, we upgraded our database servers and we’ve been very happy with the results.

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  • A Year-End Letter from the Executive Director of Let's Encrypt and ISRG

    ISRG’s first project, Let’s Encrypt, has been wildly successful. We’re now helping to secure more than 225 million websites and the Web is making great progress towards 100% HTTPS. We’ve put in a lot of hard work and dealt with some challenges along the way, but at a high level the outlook is quite sunny. I’m incredibly proud to share some of what our organization has accomplished in 2020.

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  • Extending Android Device Compatibility for Let's Encrypt Certificates

    We’re happy to announce that we have developed a way for older Android devices to retain their ability to visit sites that use Let’s Encrypt certificates after our cross-signed intermediates expire. We are no longer planning any changes in January that may cause compatibility issues for Let’s Encrypt subscribers.

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