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Head to head · Identity verification · October 2026 research run

Plaid Identity Verification vs Sumsub

Sumsub scores 68.5 (B) on agent readiness against Plaid Identity Verification's 67.1 (B), and leads in 3 of 7 scored categories. Plaid Identity Verification leads on schema & documentation, agent ergonomics and maintenance & community. Both do identity verification.

Best identity and business verification APIs for AI agents · All 119 verification comparisons

Plaid Identity VerificationPlaid Inc. · HTTP API B67.1/100#278 of 1076 SumsubSum and Substance Ltd · HTTP API B68.5/100#220 of 1076

Which one, for what

Plaid Identity Verification B

Best for US, Canadian and UK companies that want KYC with data source checks, documents and selfies, especially those already on Plaid or wanting Monitor screening in the same flow.

Ahead on

  • Schema & documentation, 91 against 78
  • Agent ergonomics, 75 against 60
  • Maintenance & community, 83 against 74

Watch for

No public prices. Rates appear only after a Production application

Sumsub B

Best for An agent that starts verifications, sends links, reads results and AML cases, and works case queues for a regulated business, with one token limited to those permissions.

Ahead on

  • Reliability, 80 against 68
  • Security & auth, 80 against 61
  • Payments & pricing, 25 against 15

Also in its favour

  • A hosted endpoint, with nothing to install

Watch for

No idempotency keys and no Retry-After or backoff guidance found in the reviewed documentation

Score by category

CategoryWeight this runPlaid Identity VerificationSumsubEdge
Reliability16%206880Sumsub +12
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.29178Plaid Identity Verification +13
Agent ergonomics13%16.27560Plaid Identity Verification +15
Security & auth14%17.56180Sumsub +19
Payments & pricing10%12.51525Sumsub +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88374Plaid Identity Verification +9
Transparency & trust7%8.87774Plaid Identity Verification +3
Negative events≤1500
TotalB 67.1/100B 68.5/100

Facts side by side

FactPlaid Identity VerificationSumsub
KindHTTP APIHTTP API
VendorPlaid Inc.Sum and Substance Ltd
Hosted endpointno (local only)https://api.sumsub.com
TransportsHTTPHTTP
AuthAPI keyOAuth or key
PricingPaidPay per use
x402nono
LicenceProprietary service under Plaid's developer policy and end-user terms. The OpenAPI file and client libraries are MITProprietary service under Sumsub's terms and conditions. The agent skills repository and the @sumsub/websdk npm package are MIT
Read-only variant documentednono
llms.txtyesyes
Last release2026-10-132026-10-03
Terms last updated2025-12-012026-05-21
Privacy policy last updated2025-12-012026-03-19
Customer content may train modelsnot found in the textyes
Terms restrict automated accessnot found in the textnot found in the text
Terms restrict benchmarkingyesnot found in the text
Terms or service can change without noticenot found in the textyes
Arbitration or class-action waivernot found in the textyes
Popularity1.2M npm/wk, 656k PyPI/wk172k npm/wk

Verdicts

Plaid Identity Verification

Plaid Identity Verification has four typed endpoints in Plaid's public OpenAPI file, an idempotent create, a backend-only flow for data source checks and frequent changelog entries. Prices appear only after applying for Production, the secret has no scopes, and the rate-limit and error pages are disallowed to crawlers.

Sumsub

Per-token permissions, an IP allowlist, HMAC-signed requests and a public OpenAPI spec with Markdown docs suit an agent working on verification cases. No idempotency keys or Retry-After guidance were found, there is no server SDK, and production access needs a browser signup, a bank card and Sumsub's review of the integration.

Before you call either

Plaid Identity Verification

  1. Pass is_idempotent: true to /identity_verification/create so a retry returns the existing session
  2. Use the backend-only flow (data source template, gave_consent: true) when you already hold the user's details. Documents and selfies need the person in Link
  3. Wait for the STATUS_UPDATED webhook or poll /identity_verification/get. Link's onSuccess doesn't mean the user passed
  4. Don't issue retries casually. Each retry is a new session billed again
  5. Enable Sandbox for Identity Verification on the Dashboard Products page before the first call

Sumsub

  1. Sign every request. X-App-Access-Sig is the lowercase hex HMAC-SHA256 of timestamp, uppercase method, path with query and raw body, and the timestamp must be within one minute of server time
  2. Use a sandbox token (prefix sbx) for agent work. Sandbox and production tokens are separate, and Sumsub's own skills refuse any other prefix
  3. Stay under 300 GET and 50 POST requests per 5 seconds, and under 500 new applicants per 24 hours in Sandbox
  4. Token permissions can't be edited after creation. Generate a new token with the narrower set and delete the old one
  5. Subscribe to the applicantReviewed webhook for results and verify x-payload-digest against the raw body before trusting it

Questions

Which is better for AI agents, Plaid Identity Verification or Sumsub?

Sumsub scores 68.5 (B) on agent readiness against Plaid Identity Verification's 67.1 (B), and leads in 3 of 7 scored categories. Plaid Identity Verification leads on schema & documentation, agent ergonomics and maintenance & community.

Do Plaid Identity Verification and Sumsub need an API key?

Plaid Identity Verification needs an API key. Sumsub takes an API key or an OAuth sign-in.

Can an agent call Plaid Identity Verification and Sumsub without installing anything?

No hosted endpoint is listed for Plaid Identity Verification. Sumsub has a hosted endpoint at https://api.sumsub.com.

Other comparisons with Plaid Identity Verification or Sumsub

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