Stytch
Developer-first passwordless authentication and fraud APIs, now part of Twilio.
Acquired — still operating
Twilio to acquire $104.1M Oct 2025
About
Stytch built an API-first authentication platform around passwordless login: magic links, one-time passcodes, WebAuthn passkeys, and device fingerprinting for fraud, with B2B organization modeling, SSO, and SCIM for SaaS products. Its developer experience and transparent pricing made it a favorite alternative to widget-centric auth vendors.
The company raised a $90M Series B in November 2021 led by Coatue at a $1B valuation after developer adoption grew roughly 10x in four months. In October 2025 Twilio announced it would acquire Stytch for $104.1M in cash, closing mid-November 2025, to build what the companies call the intelligent identity layer for the internet. The site remains Stytch-branded post-acquisition, but it is no longer an independent company.
Stytch also pivoted toward AI-agent identity before the acquisition: letting an app act as an OAuth provider for agents and MCP servers, issuing scoped revocable tokens and detecting agentic traffic. Buyers should weigh acquisition uncertainty around future product direction and pricing against the platform's strong developer experience.
What it can do
- Passwordless login: magic links, OTPs, WebAuthn passkeys
- B2B organization modeling with SSO and SCIM
- Device fingerprinting fraud detection
- Scoped OAuth tokens for AI agents and MCP servers
Setup
Sign up at stytch.com, pick Consumer or B2B products, integrate the SDKs and APIs.
Prerequisites
A web or mobile app; no credit card needed for the free tier.
Use cases
Works with
Trust score — 8/10
Scored 8/10 (verified tier, metrics-v1). Evidence: Verified via vendor site/docs/GitHub and reputable coverage, wave 87; Trending score 78/100 from researcher assessment.
Sources
Every fact above was checked against these sources. Where a claim comes from the provider and couldn't be independently verified, the text says so.