Stytch API vs Warrant API

Two free Authentication & Authorization APIs compared on access, reliability and developer ratings, using data from our daily health checks.

The verdict

Choose Stytch API if its data fits your use case better; on access and reliability it's level with Warrant API.
Choose Warrant API if you want to call it from browser JavaScript, faster responses.

	Stytch API	Warrant API
What it does	User infrastructure for modern applications.	APIs for authorization and access control.
Provider	Stytch	Warrant —> Now WorkOS FGA
API key	Required	Required
HTTPS	Yes	Yes
CORS (browser calls)	No	Yes
Status today	Online · 1903 ms	Online · 926 ms
Uptime (30 days)	Up	Up
Developer rating	Not rated yet	Not rated yet
Price	Free / free tier	Free / free tier

User infrastructure for modern applications.

APIs and SDKs to integrate authentication and security into your app.

Strengths

APIs for authorization and access control.

Warrant has been deprecated and is now WorkOS FGA (Fine-Grained Authorization).

Strengths

Prototyping or a tutorial? Pick the one that needs no API key (neither does, so compare their free tiers).
Calling from a web page? You need CORS. Otherwise route requests through your own server or a serverless function.
Going to production? Favour HTTPS, a strong uptime record and a provider with clear rate limits and terms. Check each API's docs before you commit.
Still unsure? Both are free to try: send one request to each and compare the data you get back.

Both require authentication (apiKey and apiKey).

Warrant API supports CORS, so front-end JavaScript can call it directly. Call the other from a server.