Rupt vs. Stytch
Stytch sells device fingerprinting as an add-on to its auth platform. Rupt is a standalone fraud engine for any auth stack.
The short version
Updated August 2026
- Stytch is an auth platform whose Device Fingerprinting product adds fraud signals and deterministic allow, block, or challenge verdicts to your flows, tightest inside Stytch's own auth.
- The surface is deliberately simple and stops at the auth gate: no rules engine beyond fingerprint lists, no hosted challenges, no email or phone intelligence, and no account sharing detection. Enforcement outside Stytch auth is yours to build.
- Rupt is a full fraud engine. It includes fingerprinting, email and phone intelligence, a rules engine, hosted challenges, and an AI agent that investigates accounts and monitors for new patterns.
- Both charge $0.005 per call past included volume. Stytch advertises 10,000 free lookups a month, but enabling the product means contacting sales and a minimum commitment of 200,000 lookups a month. Rupt's $99 plan includes 20,000 evaluations and a 7-day trial.
Capabilities.
Checked against both products' public pricing pages and docs, August 2026.
Why choose Rupt.
Account-centric by design
Every device, IP, and action rolls up to the user behind it. You investigate accounts, not anonymous requests, and the full history is already assembled when you get there.
Continuous monitoring
Every signup, login, and sensitive action is evaluated, so an account's risk is tracked across its lifetime and new patterns surface as they form, not after the damage.
Automated challenges
Risky actions trigger hosted email or SMS challenges automatically. Legitimate users clear them in seconds, attackers don't, and nobody on your team had to send anything.
A force multiplier for risk teams
Detection, decisioning, and enforcement run continuously without headcount. A team of one gets real coverage, and an established team spends its hours on judgment calls instead of triage.
AI-driven investigations
The AI agent digs into flagged accounts and watches for emerging abuse patterns around the clock, so your team reviews conclusions instead of assembling evidence.
Coverage across the whole journey
Evaluations are priced to run everywhere, from signup to checkout to content access, so you see the account's behavior end to end instead of a snapshot at the login gate.
Support that isn't gated behind Enterprise
Integration setup help, developer meetings, and direct Slack and email access with replies in hours come with every plan. Most vendors reserve that level of support for their top tier; with Rupt it's just how support works.
Single-vendor pricing
Fingerprinting, email and phone intelligence, rules, and challenges usually mean a vendor and an invoice each. Because Rupt ships them together, the bundle costs less than the sum of the point tools.
Migrating from Stytch.
- 01
Swap the client snippet. Load the Rupt SDK and call evaluate() on login, signup, and the actions you care about. The shape is familiar: a client call that returns an ID, then a server-side lookup. If Protected Auth was collecting for you invisibly, this is the one new piece.
- 02
Read evaluations server-side. One GET request returns the verdict, risks, fingerprint, and device ID where you used to read the fingerprint lookup response.
- 03
Run both vendors for two to four weeks. Stytch visitor IDs don't map one to one to Rupt device IDs, so let returning users fill in the mapping before you cut over.
- 04
Turn on policies in observe mode, watch the verdicts against real traffic, then enforce. Keeping Stytch as your auth provider is fine: Rupt doesn't care who handles your logins.
Frequently asked questions.
Further reading
See Rupt on your traffic.
Book a demo and we'll walk through your use case, show you the signals on real evaluations, and price out your volume.
- A walkthrough tailored to your use case.
- How detection, the rules engine, and challenges fit your stack.
- Pricing and a rollout plan for your volume.