Head to head
Coresignal vs Seamless.AI
As a data enrichment API, Coresignal rates higher on the APIbenchmarks Index, 75.2 to 68.3, a 6.9-point gap. Here is how they compare on each criterion.
Criterion by criterion
| Criterion | Coresignal | Seamless.AI |
|---|---|---|
| Documentation & DX | ||
| Reliability | ||
| Ecosystem & SDKs | ||
| Accessibility | ||
| APIbenchmarks Index | 75.2 | 68.3 |
Specifications
| Coresignal | Seamless.AI | |
|---|---|---|
| Best for | Raw professional and jobs data for engineering teams | Prospecting teams wanting UI plus API and MCP |
| Free tier | No | Free plan (50 lifetime credits per third party; API eligibility unconfirmed) |
| Pricing | Monthly credit subscription (Collect + Search credits) | Per credit; sales-led Pro/Enterprise |
| Official SDKs | 5 languages | 6 languages |
Is Coresignal better than Seamless.AI?
On the APIbenchmarks Index, Coresignal rates higher (75.2 vs 68.3). 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
Coresignal leads by 6.9 points (75.2 vs 68.3) and wins 3 of 4 criteria; Seamless.AI wins 1.
Winner by criterion
| Criterion | Winner | ||
|---|---|---|---|
| Documentation & DX | 80 | 76 | |
| Reliability | 78 | 74 | |
| Ecosystem & SDKs | 66 | 68 | |
| Accessibility | 76 | 50 |
Choose Coresignal if… / choose Seamless.AI if…
- →documentation & dx matters most to you (80 vs 76)
- →reliability matters most to you (78 vs 74)
- →accessibility matters most to you (76 vs 50)
- →your use case matches its focus: raw professional and jobs data for engineering teams
- →ecosystem & sdks matters most to you (68 vs 66)
- →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 5)
- →your use case matches its focus: prospecting teams wanting ui plus api and mcp
Pricing side by side
- Model
- Monthly credit subscription (Collect + Search credits)
- Free tier
- No
- Free trial$0
- Mini$49/mo
- Starter$199/mo
- Pro$499/mo
- Growth to Elite$1,000 to $5,000/mo
- DatasetsFrom $1,000+
- 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 (Coresignal) and 2026-10-07 (Seamless.AI).
SDK and language coverage
Both · 2
REST API (HTTPS / JSON)No official language SDKs found
Only Coresignal · 3
Coresignal MCP server (Node.js via mcp-remote)API playgrounds (web)llms.txt / llms-full.txt documentation exports
Only Seamless.AI · 4
OpenAPI YAML/JSONPostman collectionMCP servercurl, Python and Node examples
Strengths and weaknesses
- +Transparent self-serve credit plans from $49/month, no sales call to start
- +Quickstart, API playgrounds, rate-limit reference and llms.txt/llms-full.txt exports in the docs
- +Official MCP server for Claude, Cursor and other MCP clients
- –No official language SDKs, OpenAPI spec page or Postman collection found in the docs index
- –Free access is a 7-day trial only, not a recurring free tier
- –Company data refreshes roughly monthly per third-party reviews; no direct-dial phone numbers
- +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
Coresignal vs Seamless.AI: questions
- Which has better documentation, Coresignal or Seamless.AI?
- Coresignal scores higher on documentation and developer experience: 80 vs 76 out of 100.
- Which is more reliable, Coresignal or Seamless.AI?
- Coresignal scores higher on reliability: 78 vs 74 out of 100.
- Do Coresignal and Seamless.AI have a free tier?
- Coresignal: no free tier. Seamless.AI: yes (Free plan (50 lifetime credits per third party; API eligibility unconfirmed)).
- How are Coresignal and Seamless.AI priced?
- Coresignal: Monthly credit subscription (Collect + Search credits). Seamless.AI: Per credit; sales-led Pro/Enterprise.
- Which has more official SDKs?
- Seamless.AI lists 6 official SDKs, Coresignal lists 5.