Tesseral
DefunctYC W24San Francisco, US · Founded 2023 · 5 employees · 1 known investors
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490 people in our graph share verified history with the Tesseral team — schools, employers, funds. One of them is your warm intro.
Yi Min Lohunlockedknows Ned O'Leary · together at The London School of Economics and Political Science (LSE) (overlapped)
knows the team · via Gem
×5knows the team · via The London School of Economics and Political Science (LSE)
×3knows the team · via Yelp
×2knows the team · via UC Berkeley College of Engineering
Tesseral is an open source platform that provides identity and access management for business software, with features including single sign-on, user provisioning, role-based access control, and audit logging. It serves organizations managing access for employees, customers, services, and AI agents.
Also known as Codomain Data · Okapi · SSO Ready · ssoReady · SSOReady
Developer ToolsEnterprise SoftwareSaaSSecurityOpen SourceAPIUnited States of AmericaAmerica / Canada
Founders & leadership· Y Combinator alumni (W24)
Tesseral was founded in 2023 by Ned O'Leary and Ulysse Carion.
NO
Ned O'Learyin𝕏Cofounder & CEO2023–2026Ned O'Leary is cofounder and CEO of Tesseral, an open source identity and access management platform for business software.
UC
Ulysse Carionin𝕏Cofounder, CTOHe previously worked at Segment, where he developed permissions and identity resolution systems, and at Gem. Carion has contributed to IETF standards, including RFC 8927.
Investors · 1
Funding
SEC filings, press & company announcements- Undisclosed amountSeed RoundMay 2025 · 2 sourcesSource ↗
Source: company announcements and press reports — follow each round's link for the claim.
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Competitors · 10
by search overlap
Auth028 shared keywordsAuth0 is an authentication and authorization platform that secures applications, AI agents, and internal tools by providing identity management, single sign-on, multi-factor authentication, and fine-grained access control capabilities.
WorkOS27 shared keywordsWorkOS provides an API platform that enables SaaS companies to build enterprise-ready features including user management, single sign-on, directory sync, and admin portals. The platform helps developers quickly implement complex infrastructure requirements needed for adoption in large organizations.
Okta26 shared keywordsOkta provides identity and access management products designed to protect the identities of workforce and customer users. The company serves enterprises and organizations that need to manage identity authentication and authorization across digital environments.
Teleport25 shared keywordsTeleport is an infrastructure identity platform that modernizes identity, access, and policy for computing environments. The company helps engineering teams reduce complexity and attack surface by simplifying trusted computing for critical infrastructure.
Cloudflare Turnstile25 shared keywordsCloudflare provides a global cloud network platform delivering security, performance, and development services through sixty-plus integrated services including SASE, application security, and full-stack development infrastructure.
Permit.io list view23 shared keywordsPermit.io provides a full-stack authorization framework that lets developers add access control and Identity Access Management to their products, with low-code tools for the rest of the organization. It offers an open-source, end-to-end solution covering permissions across applications, AI agents, tools, APIs, and data.
Authentik23 shared keywordsauthentik is an open-source identity management platform that provides single sign-on, multi-factor authentication, and zero trust security capabilities for organizations. It serves enterprises, SaaS companies, and teams managing both human and non-human identities across internal applications and customer portals.
SuperTokens20 shared keywordsSuperTokens is an open-source user authentication platform that enables developers to add authentication infrastructure to their products within 15 minutes. The company provides robust user management and authentication services to engineering teams building applications, following an open core model with free base features and paid enterprise capabilities.
Netezza19 shared keywordsIBM is a global technology company whose business spans enterprise software (including Red Hat, HashiCorp, and Confluent), IT infrastructure such as mainframes, servers, and storage, and IT consulting services. The company is also investing heavily in quantum computing and AI-based enterprise offerings, including its Lightwell open-source software security clearinghouse and the Anderon quantum wafer foundry.
Oso19 shared keywordsOso provides visibility and controls for AI agent adoption within enterprises, enabling discovery, monitoring, and enforcement of agent access and behavior. The platform detects policy violations and generates audit logs for agent actions across engineering, product, finance, and sales teams.
Companies competing with Tesseral for the same Google search keywords, organic and paid, via search-intersection analysis.
In the news
Frequently asked questions
- What does Tesseral do?
- Tesseral is an open source platform that provides identity and access management for business software, with features including single sign-on, user provisioning, role-based access control, and audit logging. It serves organizations managing access for employees, customers, services, and AI agents.
- Who founded Tesseral?
- Tesseral was founded by Ned O'Leary, Ulysse Carion in 2023.
- Who are Tesseral's investors?
- Tesseral's investors include Y Combinator.
- Where is Tesseral headquartered?
- Tesseral is headquartered in San Francisco, US.