# Didit vs Sumsub

> Didit scores 75 (BB) on agent readiness against Sumsub's 68.5 (B), and leads in 4 of 7 scored categories. Sumsub leads on transparency & trust. Both do kyc identity. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/didit-vs-sumsub
- Markdown: https://www.anchorterminal.com/compare/didit-vs-sumsub.md (~2,200 tokens)
- Slim: https://www.anchorterminal.com/compare/didit-vs-sumsub.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/didit-vs-sumsub.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-08

Didit scores 75 (BB) on agent readiness against Sumsub's 68.5 (B), and leads in 4 of 7 scored categories. Sumsub leads on transparency & trust. Both do kyc identity.

- Didit: grade BB, 75/100, rank #54 of 722. Markdown https://www.anchorterminal.com/tools/didit.md · JSON https://www.anchorterminal.com/api/v1/tools/didit.json
- Sumsub: grade B, 68.5/100, rank #177 of 722. Markdown https://www.anchorterminal.com/tools/sumsub.md · JSON https://www.anchorterminal.com/api/v1/tools/sumsub.json

## Which one, for what

### Didit (BB)

Good for: A team that wants document, liveness, screening and business registry checks from one API with public prices and no sales step, and an agent that has to set itself up.

Ahead on:
- Schema & documentation, 88 against 78
- Agent ergonomics, 69 against 60
- Payments & pricing, 60 against 25
- Maintenance & community, 82 against 74

Also in its favour:
- Agent-ready, a grade of BB or better
- Runs on your own machine
- Free to start without a card

Watch for: Three incidents marked major on status.didit.me from 22 July to 4 September 2026, each a partial outage of the core APIs traced to the primary database

### Sumsub (B)

Good 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:
- Transparency & trust, 74 against 63

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


## Score by category

| Category | Weight | Didit | Sumsub | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 80 | 80 | even |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 88 | 78 | Didit +10 |
| Agent ergonomics | 13% (16.2 this run) | 69 | 60 | Didit +9 |
| Security & auth | 14% (17.5 this run) | 76 | 80 | Sumsub +4 |
| Payments & pricing | 10% (12.5 this run) | 60 | 25 | Didit +35 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 82 | 74 | Didit +8 |
| Transparency & trust | 7% (8.8 this run) | 63 | 74 | Sumsub +11 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **75 · BB** | **68.5 · B** | |

## Facts side by side

| Fact | Didit | Sumsub |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Didit Identity Spain, S.L. | Sum and Substance Ltd |
| Hosted endpoint | `https://verification.didit.me` | `https://api.sumsub.com` |
| Transports | HTTP, Streamable HTTP, stdio | HTTP |
| Auth | OAuth or key | OAuth or key |
| Pricing | Pay per use | Pay per use |
| x402 | no | no |
| Licence | Proprietary service under Didit's Business Terms and Conditions. The MCP server in didit-protocol/mcp is MIT | Proprietary service under Sumsub's terms and conditions. The agent skills repository and the @sumsub/websdk npm package are MIT |
| Tools exposed | 156 | none |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| MCP registry | `me.didit/mcp` | not listed |
| Last release | 2026-10-08 | 2026-10-03 |
| Terms last updated | 2026-09-23 | 2026-05-21 |
| Privacy policy last updated | 2026-10-07 | 2026-03-19 |
| Customer content may train models | yes, with an opt-out | yes |
| Terms restrict automated access | not found in the text | not found in the text |
| Terms restrict benchmarking | yes | not found in the text |
| Terms or service can change without notice | not found in the text | yes |
| Arbitration or class-action waiver | not found in the text | yes |
| Popularity | 0 stars, 27k npm/wk | 172k npm/wk |

## Verdicts

**Didit.** A self-serve verification API with public per-check prices, key registration by API, scoped keys and a 365-day audit log. The status page shows three incidents marked major between 22 July and 4 September 2026, each a partial outage of the core APIs, and the sub-processor list isn't public.

**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

### Didit

1. Register with `POST https://apx.didit.me/auth/v2/programmatic/register/`, then `verify-email` with the emailed 6-character code. Use a real inbox, because reserved test domains return 500.
2. Send the key as `x-api-key` to `https://verification.didit.me/v3/`. The JWT from registration works only on `apx.didit.me`.
3. Create a workflow before `POST /v3/session/`. `workflow_id` is the only required field, and an unfinished session with the same `vendor_data` is returned again.
4. Read results from webhooks and use `GET /v3/session/{sessionId}/decision/` for back-fill. Every per-feature result is a plural array.
5. The MCP server at `https://mcp.didit.me/mcp` takes OAuth sign-in only, never an API key. Approve `didit:verification` alone when the task doesn't change workflows or keys.

### 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, Didit or Sumsub?

Didit scores 75 (BB) on agent readiness against Sumsub's 68.5 (B), and leads in 4 of 7 scored categories. Sumsub leads on transparency & trust.

### Do Didit and Sumsub need an API key?

Both take an API key or an OAuth sign-in.

### Can an agent call Didit and Sumsub without installing anything?

Yes. Didit has a hosted endpoint at https://verification.didit.me and Sumsub at https://api.sumsub.com.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/didit-vs-sumsub.json, and with the fewest tokens: https://www.anchorterminal.com/compare/didit-vs-sumsub.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "didit", "b": "sumsub"}`. From a terminal: `anchor compare didit sumsub`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/didit.json and https://www.anchorterminal.com/api/v1/tools/sumsub.json

## Other comparisons with Didit or Sumsub

- [ComplyCube vs Didit](https://www.anchorterminal.com/compare/complycube-vs-didit.md)
- [ComplyCube vs Sumsub](https://www.anchorterminal.com/compare/complycube-vs-sumsub.md)
- [Didit vs Jumio](https://www.anchorterminal.com/compare/didit-vs-jumio.md)
- [Didit vs Middesk](https://www.anchorterminal.com/compare/didit-vs-middesk.md)
- [Didit vs Persona](https://www.anchorterminal.com/compare/didit-vs-persona.md)
- [Didit vs Trulioo](https://www.anchorterminal.com/compare/didit-vs-trulioo.md)
- [Didit vs Veriff](https://www.anchorterminal.com/compare/didit-vs-veriff.md)
- [Jumio vs Sumsub](https://www.anchorterminal.com/compare/jumio-vs-sumsub.md)
- [Persona vs Sumsub](https://www.anchorterminal.com/compare/persona-vs-sumsub.md)
- [Sumsub vs Trulioo](https://www.anchorterminal.com/compare/sumsub-vs-trulioo.md)
- [Sumsub vs Veriff](https://www.anchorterminal.com/compare/sumsub-vs-veriff.md)
- [ComplyAdvantage vs Didit](https://www.anchorterminal.com/compare/complyadvantage-vs-didit.md)
- [ComplyAdvantage vs Sumsub](https://www.anchorterminal.com/compare/complyadvantage-vs-sumsub.md)
- [Middesk vs Sumsub](https://www.anchorterminal.com/compare/middesk-vs-sumsub.md)