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Head to head · Identity verification · October 2026 research run

Alloy vs Plaid Identity Verification

Plaid Identity Verification scores 67.1 (B) on agent readiness against Alloy's 52.4 (D), and leads in every scored category. Both do identity verification.

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

AlloyFirst Mile Group, Inc. (Alloy) · HTTP API D52.4/100#782 of 1076 Plaid Identity VerificationPlaid Inc. · HTTP API B67.1/100#278 of 1076

Which one, for what

Alloy D

Best for Banks and fintechs that already run onboarding through Alloy and want an agent to submit journey applications, read decisions and work investigations.

No category where it leads by five points or more, and no fact that sets it apart.

Watch for

No public prices, trial or self-serve sign-up. Access starts with a demo request

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

  • Reliability, 68 against 59
  • Schema & documentation, 91 against 73
  • Agent ergonomics, 75 against 52
  • Security & auth, 61 against 49
  • Payments & pricing, 15 against 0
  • Maintenance & community, 83 against 72
  • Transparency & trust, 77 against 62

Watch for

No public prices. Rates appear only after a Production application

Score by category

CategoryWeight this runAlloyPlaid Identity VerificationEdge
Reliability16%205968Plaid Identity Verification +9
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27391Plaid Identity Verification +18
Agent ergonomics13%16.25275Plaid Identity Verification +23
Security & auth14%17.54961Plaid Identity Verification +12
Payments & pricing10%12.5015Plaid Identity Verification +15
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.87283Plaid Identity Verification +11
Transparency & trust7%8.86277Plaid Identity Verification +15
Negative events≤1500
TotalD 52.4/100B 67.1/100

Facts side by side

FactAlloyPlaid Identity Verification
KindHTTP APIHTTP API
VendorFirst Mile Group, Inc. (Alloy)Plaid Inc.
Hosted endpointno (local only)no (local only)
TransportsHTTPHTTP
AuthOAuth or keyAPI key
PricingPaidPaid
x402nono
LicenceProprietary service under Alloy's terms of service. The @alloyidentity/web-sdk capture package is MITProprietary service under Plaid's developer policy and end-user terms. The OpenAPI file and client libraries are MIT
Read-only variant documentednono
llms.txtyesyes
Last release2026-10-052026-10-13
Terms last updated2026-03-122025-12-01
Privacy policy last updatedno date given2025-12-01
Customer content may train modelsnot found in the textnot found in the text
Terms restrict automated accessyesnot found in the text
Terms restrict benchmarkingnot found in the textyes
Terms or service can change without noticenot found in the textnot found in the text
Arbitration or class-action waiveryesnot found in the text
Popularity21k npm/wk1.2M npm/wk, 656k PyPI/wk

Verdicts

Alloy

Alloy's public docs cover journeys, evaluations, entities, documents, cases and investigations, with llms.txt, Markdown pages, OpenAPI fragments and rate-limit headers with retry-after. Access is sales-led with no public price or trial, credentials have no scopes, there is no idempotency key or server SDK, and inputs vary by each customer's workflow.

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.

Before you call either

Alloy

  1. Get the account's base URL from the customer. Defaults are api.alloy.co and sandbox.alloy.co, and some accounts have their own hosts
  2. Use unique, prefixed external IDs in sandbox. Sandbox and Production share one data store
  3. Read alloy-ratelimit-remaining, and on 429 or 5xx wait for retry-after with exponential backoff and jitter
  4. Expect running after about 25 seconds on journey applications and wait for the webhook instead of resubmitting
  5. Send the workflow header with account-level keys, since inputs depend on the workflow configured

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

Questions

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

Plaid Identity Verification scores 67.1 (B) on agent readiness against Alloy's 52.4 (D), and leads in every scored category.

Do Alloy and Plaid Identity Verification need an API key?

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

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

No hosted endpoint is listed for Alloy. No hosted endpoint is listed for Plaid Identity Verification.

Other comparisons with Alloy or Plaid Identity Verification

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