Head to head
Cognism vs Seamless.AI
As a data enrichment API, Seamless.AI rates higher on the APIbenchmarks Index, 68.3 to 60, a 8.3-point gap. Here is how they compare on each criterion.
Criterion by criterion
| Criterion | Cognism | Seamless.AI |
|---|---|---|
| Documentation & DX | ||
| Reliability | ||
| Ecosystem & SDKs | ||
| Accessibility | ||
| APIbenchmarks Index | 60.0 | 68.3 |
Specifications
| Cognism | Seamless.AI | |
|---|---|---|
| Best for | GDPR-compliant EMEA contact data for sales teams | Prospecting teams wanting UI plus API and MCP |
| Free tier | No | Free plan (50 lifetime credits per third party; API eligibility unconfirmed) |
| Pricing | Annual platform contract + search tokens/credits | Per credit; sales-led Pro/Enterprise |
| Official SDKs | 3 languages | 6 languages |
Is Cognism better than Seamless.AI?
On the APIbenchmarks Index, Seamless.AI rates higher (68.3 vs 60). It leads on the four weighted criteria, but price is reported separately, so the best choice still depends on your budget.
Verdict in one line
Seamless.AI leads by 8.3 points (68.3 vs 60) and wins 4 of 4 criteria.
Winner by criterion
| Criterion | Winner | ||
|---|---|---|---|
| Documentation & DX | 72 | 76 | |
| Reliability | 66 | 74 | |
| Ecosystem & SDKs | 62 | 68 | |
| Accessibility | 32 | 50 |
Choose Cognism if… / choose Seamless.AI if…
- →your use case matches its focus: gdpr-compliant emea contact data for sales teams
- →documentation & dx matters most to you (76 vs 72)
- →reliability matters most to you (74 vs 66)
- →ecosystem & sdks matters most to you (68 vs 62)
- →accessibility matters most to you (50 vs 32)
- →you want a free tier to start (Free plan (50 lifetime credits per third party; API eligibility unconfirmed))
- →you need broad SDK coverage (6 official SDKs vs 3)
- →your use case matches its focus: prospecting teams wanting ui plus api and mcp
Pricing side by side
- Model
- Annual platform contract + search tokens/credits
- Free tier
- No
- FreeNone
- Platform plansCustom (third-party: about $15k-$25k/yr entry)
- Enterprise / Diamond dataCustom (third-party: $40k-$100k+/yr)
- Model
- Per credit; sales-led Pro/Enterprise
- Free tier
- Free plan (50 lifetime credits per third party; API eligibility unconfirmed)
- Free$0
- ProContact sales (third-party: about $4,740-$9,000/yr for 5 users)
- EnterpriseCustom
Vendor-published pricing, verified 2026-10-07 (Cognism) and 2026-10-07 (Seamless.AI).
SDK and language coverage
Both · 2
REST API (OAuth 2.0)MCP server
Only Cognism · 1
No official SDKs found
Only Seamless.AI · 4
OpenAPI YAML/JSONPostman collectioncurl, Python and Node examplesNo official language SDKs found
Strengths and weaknesses
- +Clear OAuth 2.0 client-credentials auth with documented 20-minute tokens
- +Published rate limits (500 req/min per operation) with standard RateLimit headers
- +Separate search-token and credit metering visible in response headers
- –API requires a subscription entitlement and org-level enablement
- –No public pricing or free tier; contracts commonly $15k-$100k+/yr per third-party estimates
- –No official SDKs or changelog found
- +Modern async API with webhooks or polling plus OpenAPI YAML/JSON specs
- +MCP server with 57 tools documented for Claude, Cursor, VS Code and ChatGPT
- +Published rate limits and simple credit rules (search 1 credit per 10 results; polling free)
- –Plan eligibility for the API is unclear and sources conflict
- –60 requests/min per endpoint, restrictive for bulk jobs
- –Pro and Enterprise pricing is sales-led
Cognism vs Seamless.AI: questions
- Which has better documentation, Cognism or Seamless.AI?
- Seamless.AI scores higher on documentation and developer experience: 76 vs 72 out of 100.
- Which is more reliable, Cognism or Seamless.AI?
- Seamless.AI scores higher on reliability: 74 vs 66 out of 100.
- Do Cognism and Seamless.AI have a free tier?
- Cognism: no free tier. Seamless.AI: yes (Free plan (50 lifetime credits per third party; API eligibility unconfirmed)).
- How are Cognism and Seamless.AI priced?
- Cognism: Annual platform contract + search tokens/credits. Seamless.AI: Per credit; sales-led Pro/Enterprise.
- Which has more official SDKs?
- Seamless.AI lists 6 official SDKs, Cognism lists 3.