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.

Ready to build?

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

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