Seamless Auth
The facts below are what the maker publishes about Seamless Auth, checked and dated. Our editors have not written about it yet.
Plans and prices
From Seamless Auth's own pricing page, checked 9 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free trial | Free | Full managed auth instance · Passkeys, magic links, email and phone OTP, TOTP MFA · One trial per account · $0 for 14 days |
| MVP | $49 a month | Unlimited users · Dedicated auth service and database · Authentication events · 1 day log retention · $49 per month |
| Business | $149 a month | Unlimited users · Dedicated auth service and database · Authentication audit logs · Configurable rate limits and TTLs · 7 day log retention · $149 per month |
| Enterprise | Priced on request | Advanced compliance requirements · Higher scale · Custom infrastructure needs · Tailored deployments and support; contact for details |
The facts
Each one read from Seamless Auth's own pages, with the date it was checked.
What it does
- Audit logs
- Business includes authentication audit logs and seven-day log retention; MVP includes authentication events and one-day log retention.checked 9 Oct 2026
- Authentication methods
- The product supports passkeys, magic links, email and phone OTP, and TOTP MFA.checked 9 Oct 2026
- Framework support
- The authentication core is framework agnostic and uses adapters to integrate with server frameworks.checked 9 Oct 2026
- Frontend integration
- The React SDK exposes authenticated session state without redirects, hosted login pages, or client-side token handling.checked 9 Oct 2026
- Integrations
- The maker documents React, Express, Fastify, and Next.js integrations, with a framework-agnostic core for other runtimes.checked 9 Oct 2026
- Managed isolation
- Each managed instance runs its auth service and its own database in dedicated, isolated containers on a shared network backbone.checked 9 Oct 2026
- Notable limitation
- TOTP routes exist in the auth API, but the maker says they are not yet wrapped by the React SDK or mounted by the Express adapter.checked 9 Oct 2026
- OAuth
- The auth API supports OAuth provider discovery, authorization start, callback validation, and account linking.checked 9 Oct 2026
- Open source
- The core is released under AGPL-3.0 and can be inspected, modified, and self-hosted at no cost.checked 9 Oct 2026
- Product
- Seamless Auth is open-source passwordless authentication infrastructure that can be self-hosted or used as a managed service.checked 9 Oct 2026
- Security boundary
- The maker says sessions are validated in the customer’s application against a signed token, so normal authenticated traffic does not round-trip to Seamless Auth.checked 9 Oct 2026
- Self-hosting setup
- The maker’s homepage says one CLI command scaffolds a web app, API, auth server, and database wired together for local operation.checked 9 Oct 2026
- Who it is for
- The managed MVP plan is described for early products and prototypes, while Business covers the majority of production application use cases.checked 9 Oct 2026
Money
- Trial terms
- The trial is a full managed auth instance, requires no credit card, is limited to one per account, and is removed at the end unless upgraded.checked 9 Oct 2026
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