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Tesseral

Scalable API‑first auth platform for B2B SaaS

Tesseral's cloud‑native, multi‑tenant authentication service offers customizable login pages, SSO, MFA, API keys and RBAC, with SDKs for popular frameworks and a managed console.

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Overview

Overview

Tesseral is a cloud‑native, API‑first authentication service built for B2B SaaS applications. It delivers a complete set of identity features—hosted, brandable login pages, social and enterprise SSO (Google, GitHub, Microsoft, SAML, OIDC), magic links, MFA, passkeys, API key management, RBAC, audit logs, webhooks, user invitations, SCIM directory sync, and real‑time webhook delivery—without writing authentication code. The platform is multi‑tenant, giving each customer its own admin console to manage users, login methods, permissions, and compliance settings.

Deployment

Developers can start instantly with Tesseral’s managed service at console.tesseral.com, obtaining a publishable key and integrating via the provided SDKs for React, Next.js, Express, Flask, FastAPI, Django, Go and Rust. For teams that require full control, the solution can be self‑hosted following the documentation, running on any cloud provider. Because the service is API‑first, any backend language can verify tokens via simple HTTP calls, fitting microservices architectures. The SDKs handle token refresh, request signing, and login gating, while the backend SDK validates tokens and supplies claim helpers. This lets product teams focus on core functionality while Tesseral handles secure, compliant authentication at scale.

Highlights

Hosted, brandable login pages with click‑to‑add authentication methods
Built‑in B2B multitenancy and self‑service admin UI for each customer
Zero‑code integration of SSO, MFA, Passkeys, API keys and RBAC
Extensive SDKs for frontend and backend frameworks

Pros

  • API‑first design works with any tech stack
  • Managed service removes infrastructure overhead
  • Rich set of authentication methods out‑of‑the‑box
  • Granular RBAC and audit logs for compliance

Considerations

  • Self‑hosting requires own cloud resources and ops
  • Feature set may be overkill for simple apps
  • Custom UI limited to provided templates unless self‑hosted
  • Enterprise SSO protocols need proper configuration

Managed products teams compare with

When teams consider Tesseral, these hosted platforms usually appear on the same shortlist.

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Looking for a hosted option? These are the services engineering teams benchmark against before choosing open source.

Fit guide

Great for

  • B2B SaaS products needing tenant‑level auth management
  • Teams that want a ready‑made login UI and SSO integrations
  • Developers seeking SDKs for React, Next.js, Flask, Go, Rust
  • Companies requiring audit logs, MFA and API key support

Not ideal when

  • Single‑tenant consumer apps with minimal auth needs
  • Projects that prefer a lightweight library over a full service
  • Organizations without capacity to manage self‑hosted infrastructure
  • Products that need deep custom UI beyond provided templates

How teams use it

Enterprise customer onboarding

Admins invite users, configure SSO and enforce MFA from a self‑service console.

Social login integration

Enable Google, GitHub, or Microsoft login with a single configuration step, no code changes.

API‑driven service authentication

Issue scoped API keys with permissions and audit logging for programmatic access.

Support debugging via impersonation

Support engineers log in as a user to reproduce issues instantly.

Tech snapshot

TypeScript51%
Go48%
CSS1%
JavaScript1%
Shell1%
Dockerfile1%

Frequently asked questions

Do I need to run my own servers?

You can use Tesseral’s managed service at console.tesseral.com, or self‑host following the documentation.

Which programming languages are supported?

SDKs are provided for JavaScript/React, Next.js, Express, Python (Flask, FastAPI, Django), Go, and Rust (Axum).

Can I customize the login page branding?

Yes, the hosted login pages are fully brandable via the Tesseral Console.

How does multitenancy work?

Each tenant has its own admin UI where customer admins manage users, login methods, and permissions.

Is MFA optional for my customers?

MFA can be enabled per tenant; users can opt‑in or admins can require it.

Project at a glance

Active
Stars
1,104
Watchers
1,104
Forks
51
LicenseMIT
Repo age1 year old
Last commit4 days ago
Primary languageTypeScript

Last synced 3 hours ago