Tesseral – Open-Source Auth
Hi folks! I'm Ulysse, and Tesseral (https://github.com/tesseral-labs/tesseral) is open-source auth for B2B SaaS. Early in my career, I worked on enterprise auth and security features at Segment. I've been obsessed with the subtle details of enterprise software ever since. For example, I wrote an implementation of SAML in the early days of the COVID pandemic because I thought it was fun. Over the years, I've felt frustrated that too few people have seemed interested in making auth obvious for developers of business software. Auth really doesn't need to be so confusing. We…
Tesseral – Open-Source Auth launched on May 28, 2025 with 193 votes, #177 of 7,905 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 1 year on.
In plain words
Tesseral is an open-source authentication system designed for B2B SaaS applications. It allows developers to implement user login, authentication, and access management without the complexity typically associated with enterprise auth. Built by someone with experience in enterprise security at Segment, Tesseral provides an alternative to commercial services like Auth0 or Clerk, letting software engineers handle authentication details efficiently so they can focus on building product features.
written from the facts on this page · September 2026
From the sources
A full-stack, open source authentication platform for B2B software. Tesseral eliminates the complexities of authentication, so developers can focus on core product features without compromising on security.
Open source auth infrastructure for B2B SaaS. Contribute to tesseral-labs/tesseral development by creating an account on GitHub.
In the maker’s words, at launch
Hi folks! I'm Ulysse, and Tesseral (https://github.com/tesseral-labs/tesseral) is open-source auth for B2B SaaS. Early in my career, I worked on enterprise auth and security features at Segment. I've been obsessed with the subtle details of enterprise software ever since. For example, I wrote an…
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