# tesseral-labs/tesseral

Open source auth infrastructure for B2B SaaS

Repository: https://github.com/tesseral-labs/tesseral
Canonical: https://ross.abutalabs.com/products/tesseral
Homepage: https://tesseral.com
Language: TypeScript
License: MIT
License Family: permissive
Last push: 2026-02-14T10:24:45+00:00

## Health v2 (maintenance only)
Score: 43/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 67, release rhythm 9, longevity 48
- inputs: {"age_days": 675, "days_push": 200, "days_rel": 398, "gap_med": null, "n_releases_24m": 1}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1138, forks 55 (observed 2026-08-28T04:03:44.010906+00:00)

## What it is
Tesseral is open-source, multi-tenant authentication infrastructure designed for B2B SaaS applications, runnable as a cloud service or self-hosted. It provides hosted customizable login pages, tenant-level admin controls, user impersonation, and works with any tech stack via an API-first design.

## Use cases
- add authentication to a b2b saas product
- manage multi-tenant users with customer admin controls
- self-host an auth service instead of using auth0
- implement sso and scim for enterprise customers
- impersonate users for debugging and support
- customize hosted login pages to match my brand

## When to choose
- you're building B2B SaaS and need multitenant auth out of the box
- you want an API-first auth service that works with any stack
- you need enterprise features like SSO, SCIM, and user impersonation
- you want the option to self-host rather than depend on a closed managed service

## When to avoid
- you need a lightweight auth library embedded directly in your app
- your product is consumer-facing with no tenant/organization model
- you want a fully managed service and never intend to self-host
- you need deep customization beyond what hosted login pages allow

## Facets
- artifact type: service
- maturity: active
- function: auth, authorization, api-framework, self-hosted
- domain: security, web-development, backend, developer-tools, apis
- platform: self-hosted, cloud
- tags: b2b-saas, multitenancy, identity-management, sso, user-impersonation, managed-auth, docker, web-server, typescript

## Member repositories
- tesseral-labs/tesseral (main) score 43

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:44.010906+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:36:10.946123+00:00, confidence not recorded.
  - readme: https://github.com/tesseral-labs/tesseral (fetched 2026-08-28T04:03:44.010906+00:00, sha bcb6951f1b4c)
- Data as of 2026-08-30T08:39:29.467469+00:00.