Step up sensitive flows with a sub-2-second face match against the enrolled portrait. Phishing-resistant. SIM-swap-proof. $0.10 per authentication. 500 verifications free every month.
Robinhood Ventures
Trusted by 2,000+ organizations worldwide.
Phishing-resistant · SIM-swap-proof
The second factor is the user's face, matched 1:1 against the portrait they enrolled at sign-up. Liveness blocks the print / replay / mask / Generative Adversarial Network (GAN) attack on the same frame. Sub-2-second verdict on entry-level Android. $0.10 per authentication. 500 verifications free every month.
Pick the checks you want, ID, liveness, face match, sanctions, address, age, phone, email, custom questions. Drag them into a flow in the dashboard, or post the same flow to our API. Branch on conditions, run A/B tests, no code required.
Embed natively with our Web, iOS, Android, React Native, or Flutter SDK. Redirect to a hosted page. Or just send your user a link, by email, SMS, WhatsApp, anywhere. Pick what fits your stack.
Didit hosts the camera, the lighting cues, the mobile hand-off, and accessibility. While the user is in the flow, we score 200+ fraud signals in real time and verify every field against authoritative data sources. Result in under two seconds.
Real-time signed webhooks keep your database in sync the moment a user is approved, declined, or sent to review. Poll the API on demand. Or open the console to inspect every session, every signal, and manage cases your way.
Didit · Biometric Authentication
Confirm transfer
Show your face to authorise
Didit · Face Match 1:1
Enrolled
Similarity
0.96
MatchLive
Didit · Attack matrix
Didit · Step-up triggers
Didit · Webhook · X-Signature-V2
Payload
{
"session_id": "<uuid>",
"vendor_data": "user-42",
"status": "Approved",
"face": {
"status": "Approved",
"similarity_score": 0.96
}
}Didit · Economics
$ curl -X POST https://verification.didit.me/v3/session/ \
-H "x-api-key: $DIDIT_API_KEY" \
-d '{
"workflow_id": "wf_bio_2fa",
"workflow_type": "biometric_authentication",
"vendor_data": "user-42",
// base64 reference selfie, ≤ 1MB (omit for liveness-only)
"portrait_image": "/9j/4AAQSkZJRgABAQE..."
}'LIVENESS + FACE_MATCH against the supplied portrait_image.docs →$ curl -X POST https://verification.didit.me/v3/face-match/ \
-H "x-api-key: $DIDIT_API_KEY" \
-F "image_a=@live.jpg" \
-F "image_b=@enrolled.jpg"You are integrating Didit's Biometric 2FA into <my_stack>. Replace SMS one-time-password (OTP) on sensitive flows — login from a new device, large-value transfer, settings change, account recovery — with a sub-2-second face match against the user's enrolled portrait. Cheaper than SMS. Phishing-resistant. SIM-swap-proof.
1. Enrol the user's portrait ONCE at sign-up via the standard Know Your Customer (KYC) session.
2. On every sensitive action, open a Biometric Authentication session that runs Passive Liveness + Face Match 1:1 against the stored portrait. Verdict in sub-2-seconds.
Pricing (public):
- Biometric Authentication: $0.10 per authentication (Sessions API)
- Standalone Face Match 1:1: $0.05 per match (server-to-server)
- First 500 verifications free every month, forever
PRE-REQUISITES
- Production API key from https://business.didit.me (sandbox key in 60s, no card).
- Webhook endpoint with Hash-based Message Authentication Code (HMAC) SHA-256 verification using the X-Signature-V2 header.
- The user has previously enrolled — either via a full KYC session (recommended; the portrait is stored automatically and never leaves Didit) or via a portrait you supply on each re-auth.
- A workflow_id from the Workflow Builder. The workflow MUST contain LIVENESS, and the session must be opened with workflow_type = "biometric_authentication" (or use a workflow that has FACE_MATCH and pass a portrait_image at session creation).
STEP 1 — Enrolment (one-time, at user sign-up)
Run a standard KYC session at sign-up. Didit stores the portrait (the face captured during the liveness step) as the user's enrolled template, bound to vendor_data.
POST https://verification.didit.me/v3/session/
Body:
{
"workflow_id": "<your KYC workflow>",
"vendor_data": "<your user id>"
}
No additional code — once the user passes KYC, their enrolled portrait is ready for every future re-auth.
STEP 2 — Re-authentication (on every sensitive action)
POST https://verification.didit.me/v3/session/
Headers:
x-api-key: <your api key>
Content-Type: application/json
Body:
{
"workflow_id": "<your biometric_authentication workflow>",
"workflow_type": "biometric_authentication",
"vendor_data": "<the same user id used at enrolment>",
"callback": "https://<your-app>/2fa/callback",
"metadata": {
"reason": "<login_new_device | high_value_txn | settings_change | account_recovery>",
"amount": "<optional, for large-value transfers>"
},
"portrait_image": "<base64 JPEG of the user's enrolment selfie, ≤ 1 MB — REQUIRED when the workflow has FACE_MATCH active; OMIT for liveness-only mode>"
}
Response: 201 Created with the hosted session_url. Redirect the user to it. The hosted UI:
- Opens the front camera
- Captures one passive frame
- Runs Liveness + Face Match 1:1 against the user's enrolled portrait
- Returns the verdict in sub-2-seconds
STEP 3 — Read the signed verdict on the webhook
Body (excerpted for a passing re-auth):
{
"session_id": "<uuid>",
"vendor_data": "<your user id>",
"status": "Approved",
"liveness": { "status": "Approved", "method": "PASSIVE", "score": 96 },
"face": {
"status": "Approved",
"similarity_score": 0.96
}
}
Verify X-Signature-V2 BEFORE trusting the body — HMAC SHA-256 of the raw bytes with your webhook secret.
Session status enum (exact case): Approved | Declined | In Review | Resubmitted | Expired | Not Finished | Kyc Expired | Abandoned.
Branch your application:
Approved → execute the action (sign in, release the transfer, save settings).
Declined → block the action, re-prompt with a higher-friction recovery path (support contact / KYC re-do).
In Review → hold; route to your operations queue.
Not Finished → user abandoned the capture; safe to re-prompt or fall back.
STEP 4 — Alternate path (server-to-server, when you already have the selfie)
If you already captured the selfie locally (native mobile SDK, in-app camera):
POST https://verification.didit.me/v3/face-match/
Headers:
x-api-key: <your api key>
Body (multipart/form-data):
image_a <the live selfie>
image_b <the enrolled portrait>
Response: similarity_score (0-1), status (Approved | Declined | In Review).
Use the standalone path only when you trust your client-side capture pipeline. For browser flows or any surface where the SDK is not embedded, always prefer the hosted session — Didit's liveness check is harder to defeat than a raw camera grab.
WEBHOOK EVENT NAMES
- Sessions: status changes flow through the standard session webhook.
- Always verify X-Signature-V2 on every payload.
CONSTRAINTS
- Base URL for /v3/* endpoints is verification.didit.me (NOT apx.didit.me).
- Feature enum is UPPERCASE: LIVENESS, FACE_MATCH, ID_VERIFICATION, AML, IP_ANALYSIS, AGE_ESTIMATION.
- Method enum is UPPERCASE: PASSIVE, FLASHING, ACTIVE_3D.
- Auth header is x-api-key (lowercase, hyphenated).
- Webhook signature header is X-Signature-V2 (NOT X-Signature).
- Status casing matches exactly: Approved, Declined, In Review, Expired, Not Finished, Resubmitted, Kyc Expired, Abandoned.
- The biometric template is irreversible (a one-way hash) and stored on Didit's infrastructure. You never receive the raw template. Standard data-subject-deletion rules apply.
PRO TIPS
- Pair Biometric 2FA with Device & IP Analysis (bundled into the 200+ fraud-signal stack). A re-auth that originates from a brand-new device + a brand-new IP should always step up to face.
- For the strongest possible surface, swap method PASSIVE for ACTIVE_3D — a short motion challenge — on transfers above your operational risk threshold.
Read the docs:
- https://docs.didit.me/core-technology/biometric-auth/overview
- https://docs.didit.me/sessions-api/create-session
- https://docs.didit.me/integration/webhooks
Start free at https://business.didit.me — sandbox key in 60 seconds, 500 verifications free every month, no credit card.$0 / month. No credit card required.
Pay only for what you use. 25+ modules. Public per-module pricing, no monthly minimum fee.
Custom MSA & SLA. For large volumes and regulated programs.
Start free → pay only when a check runs → unlock Enterprise for a custom contract, SLA, or data residency.
Didit is infrastructure for identity and fraud, the platform we wished existed when we were building products ourselves: open, flexible, and developer-friendly, so it works as a real part of your stack instead of a black box you integrate around.
One API covers verifying people (KYC, know your customer), verifying businesses (KYB, know your business), screening crypto wallets (KYT, know your transaction), and monitoring transactions in real time, on a stack built to be:
The footprint underneath: 14,000+ document types in 48+ languages, 1,000+ data sources, and 200+ fraud signals on every session. The Didit infrastructure dynamically learns from every session and gets better every day.
Second-factor authentication using the user's face, not a code sent over a network. The first factor is what the user knows (password, passkey, magic link). The second factor is what the user is, a live selfie matched 1:1 against a portrait the user enrolled earlier.
It sits in the same place as SMS one-time-password (OTP) in your application flow, but with a different cost, security, and conversion profile.
Four well-documented attack classes defeat it. The US Federal Bureau of Investigation (FBI) and UK National Cyber Security Centre (NCSC) have both published guidance steering organisations away from SMS for sensitive flows.
The full flow normally takes under 30 seconds end-to-end, pick up the ID, snap the document, snap the selfie, done. That is the fastest in the market. Legacy KYC providers usually take more than 90 seconds for the same flow.
On the back end, Didit returns the result in under two seconds at p99, measured from the moment the user finishes the selfie to the moment your webhook fires. Mobile capture is tuned for slow phones and slow networks: progressive image compression, lazy software development kit load, and a one-tap hand-off from desktop to phone via QR code if the user starts on web.
Most teams enrol during the user's original Know Your Customer (KYC) session. The portrait captured by the liveness step is stored bound to your vendor_data and used as the template for every subsequent re-authentication.
If you don't run KYC at sign-up, you can run a one-time enrolment session against a Didit workflow that contains only LIVENESS + FACE_MATCH. Either path costs $0.10 once, and the resulting template is reusable for every future authentication.
Every session lands on one of seven clear statuses, so your code always knows what to do:
Approved, every check passed. Move the user forward.Declined, one or more checks failed. You can allow the user to resubmit the specific failed step (for example, re-take the selfie) without re-running the whole flow.In Review, flagged for compliance review. Open the case in the console, see every signal, decide approve or decline.In Progress, user is mid-flow.Not Started, link sent, user has not opened it yet. Send a reminder if it sits too long.Abandoned, user opened the link but did not finish in time. Re-engage or expire.Expired, the session link aged out. Create a new session.A signed webhook fires on every status change, so your database always stays in sync. Abandoned and declined sessions are free.
Production data is processed and stored in the European Union by default, on Amazon Web Services. Enterprise contracts can request alternative regions for jurisdictions whose regulators require it.
Encryption everywhere. AES-256 at rest across every database, object store, and backup. Transport Layer Security 1.3 in transit on every API call, webhook, and Business Console session. Biometric data is encrypted under a separate Customer Master Key.
Retention is yours to control. Default retention is indefinite (unlimited) unless you configure shorter, between 30 days and 10 years per application, and you can delete any individual session at any time from the dashboard or the API.
Certifications: SOC 2 Type 1 (Type 2 audit in progress), ISO/IEC 27001:2022, iBeta Level 1 PAD, and a public attestation from Spain''s Tesoro / SEPBLAC / CNMV that Didit''s remote identity verification is safer than verifying someone in person. Full report at /security-compliance.
Didit ships compliant by default for the regulators that matter to identity infrastructure:
Detailed memo, every certificate, every regulator letter: /security-compliance.
Three integration paths, pick whichever fits your stack:
Same dashboard, same billing, same pay-per-success price for all three. Step-by-step guide at docs.didit.me/integration/integration-prompt.
It's a drop-in for your existing one-time-password callback contract.
POST /v3/session/ with workflow_type: "biometric_authentication" and the same vendor_data you used at enrolment.session_url.X-Signature-V2 header on the webhook before trusting the body.status, Approved (execute the action), Declined (block), In Review (queue), Not Finished (re-prompt).Most teams swap SMS for face in a weekend. Full agent-pastable prompt is above; Model Context Protocol (MCP) server speaks both surfaces.
Face Match 1:1 is resilient to moderate appearance change, facial hair, glasses, hair colour, lighting. The similarity score returned per authentication reflects how confident the model is.
For users who drift outside the auto-approve threshold (typical case: dramatic weight change, surgery, ageing over many years), the verdict returns In Review and routes to your operations queue. The standard recovery path is a re-enrolment session, one KYC call refreshes the portrait, and the next authentication uses the new template.
Yes for the inherence category. The European Banking Authority Regulatory Technical Standards on Strong Customer Authentication recognise biometric attributes (something you are) as a valid second factor when paired with one of the other two categories (knowledge or possession).
For a full PSD2 strong-customer-authentication flow, pair biometric 2FA with the user's password (knowledge) or a device-bound session (possession). The signed Didit verdict is the audit-pack evidence of the inherence factor.
One API for KYC, KYB, Transaction Monitoring, and Wallet Screening. Integrate in 5 minutes.