API driven authentication

Reduce complexity and heavy lifting. Drop-in flexible auth challenges and account controls with Authsignal’s APIs, SDKs, and Pre-built flows.

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Transform your post-login workflow experience with Authsignal. From enrollment to account recovery.

Drop-in passkeys, biometric auth, magic links, OTPs, push auth, and adaptive MFA. With lightning-fast APIs and full native SDKs, the pathway to uplift security and user experience has never been so fast.

Integrates with your stack
Start integrating in minutes — no credit card required
Handles the hard parts
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How Authsignal fits into your stack

3-Step Flow: Where Authsignal fits in

Client Side SDKs
Server SDK
Add auth anywhere
Post-login, sensitive actions, recovery
Connects to your existing user model
We don’t replace your IdP

Why developers love Authsignal

Skip the boilerplate

No need to write brittle auth logic

Real-time auth flows

Configure and update authentication rules instantly without code changes

Secure by default

Enterprise-grade security with risk scoring, fraud prevention, and compliance built-in

Fits your stack

Integrates with your existing tech through hosted UI components, or SDKs

Deploying passkeys has enhanced our security and accelerated our transition to a passwordless login experience, streamlining the customer journey.

CTO - Simplicity

The Rules Engine — Flexible, Code-Free Control

Adapt your auth logic without touching production code.

Use Authsignal’s built-in Rules Engine to define when and how users are challenged — based on risk, behavior, or custom events.

What you can do:

Dynamically challenge based on IP, device, geo, or event type
Escalate based on risk (e.g. require passkey for recovery)
Make changes in real time — no deploys, no waiting
It’s like feature flags, but for authentication.
See Rules Engine in Action

AI Explanation

Let AI untangle your auth logic

AI-Powered Rule Insights

Instantly understand what’s going on — without diving into code.
Summarize complex rules in plain English — instantly know what a rule is doing
Diagnose why a rule was triggered — without scanning logs or code
Understand triggered actions at a glance — so you can debug or optimize faster

Synchronize User Profile Data Across Multiple Sources

Aggregate distributed data into a single user profile. Enable real-time decisions with synchronized data and intelligent rule execution.

What We Are - and What We Are Not

Drop-in authentication orchestration
Hosted MFA and account recovery UX
Passkeys and modern auth standards ready
We integrate with your login provider (Auth0, Cognito, custom)
We don’t store your primary credentials

Developer Resources

Read Our Docs
SDKs and Quickstarts

Ready to Build?

No more brittle auth logic. No more reinventing flows. Start building secure, native-feeling auth in minutes.

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