Company Overview
Tesseral is a US-based open source identity management company that builds B2B authentication infrastructure, enabling developers to integrate SAML and SCIM protocols with existing identity providers. Founded by Ned O'Leary and Ulysse Carion, the company raised $3.3M in seed funding in May 2025 from Y Combinator and notable angels including Jessica Livingston and Paul Graham. Tesseral democratizes enterprise authentication standards previously accessible only to large organizations, having gained early traction with SSOReady, their open source enterprise SSO tool.
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Emerging Innovator
Tesseral is an emerging player bringing innovative solutions to the Security market.
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