Head to head
People Data Labs vs Seamless.AI
As a data enrichment API, People Data Labs rates higher on the APIbenchmarks Index, 84.9 to 68.3, a 16.6-point gap. Here is how they compare on each criterion.
Criterion by criterion
| Criterion | People Data Labs | Seamless.AI |
|---|---|---|
| Documentation & DX | ||
| Reliability | ||
| Ecosystem & SDKs | ||
| Accessibility | ||
| APIbenchmarks Index | 84.9 | 68.3 |
Specifications
| People Data Labs | Seamless.AI | |
|---|---|---|
| Best for | Bulk person/company data for builders | Prospecting teams wanting UI plus API and MCP |
| Free tier | 100 person/company lookups/mo (emails/phones obfuscated) | Free plan (50 lifetime credits per third party; API eligibility unconfirmed) |
| Pricing | Per enrichment credit | Per credit; sales-led Pro/Enterprise |
| Official SDKs | 7 languages | 6 languages |
Is People Data Labs better than Seamless.AI?
On the APIbenchmarks Index, People Data Labs rates higher (84.9 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
People Data Labs leads by 16.6 points (84.9 vs 68.3) and wins 4 of 4 criteria.
Winner by criterion
| Criterion | Winner | ||
|---|---|---|---|
| Documentation & DX | 88 | 76 | |
| Reliability | 82 | 74 | |
| Ecosystem & SDKs | 80 | 68 | |
| Accessibility | 90 | 50 |
Choose People Data Labs if… / choose Seamless.AI if…
- →documentation & dx matters most to you (88 vs 76)
- →reliability matters most to you (82 vs 74)
- →ecosystem & sdks matters most to you (80 vs 68)
- →accessibility matters most to you (90 vs 50)
- →you need broad SDK coverage (7 official SDKs vs 6)
- →your use case matches its focus: bulk person/company data for builders
- →your use case matches its focus: prospecting teams wanting ui plus api and mcp
Pricing side by side
- Model
- Per enrichment credit
- Free tier
- 100 person/company lookups/mo (emails/phones obfuscated)
- Free$0/mo
- ProFrom ~$98/mo
- EnterpriseCustom (commonly $20k-$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 2026-06-27 (People Data Labs) and 2026-10-07 (Seamless.AI).
SDK and language coverage
Both · 0
None
Only People Data Labs · 7
PythonJavaScript / TypeScript (Node + browser)GoRubyRustcURL / RESTOpenAPI (Swagger) specification
Only Seamless.AI · 6
REST API (v1/v2)OpenAPI YAML/JSONPostman collectionMCP servercurl, Python and Node examplesNo official language SDKs found
Strengths and weaknesses
- +Pay only for successful matches (HTTP 200), missed lookups are not billed
- +Very large breadth: 3B+ person profiles across 200+ countries and ~70M company profiles
- +Developer-first REST API with Elasticsearch-style search queries praised as flexible and well-documented
- –Data refreshes roughly monthly, so job titles and employers can be weeks-to-months stale
- –Heavy reliance on LinkedIn means non-LinkedIn people are under-represented and some self-reported titles leak through
- –Verified emails and direct-dial phones often require extra Person Identify calls at higher per-match cost
- +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
People Data Labs vs Seamless.AI: questions
- Which has better documentation, People Data Labs or Seamless.AI?
- People Data Labs scores higher on documentation and developer experience: 88 vs 76 out of 100.
- Which is more reliable, People Data Labs or Seamless.AI?
- People Data Labs scores higher on reliability: 82 vs 74 out of 100.
- Do People Data Labs and Seamless.AI have a free tier?
- People Data Labs: yes (100 person/company lookups/mo (emails/phones obfuscated)). Seamless.AI: yes (Free plan (50 lifetime credits per third party; API eligibility unconfirmed)).
- How are People Data Labs and Seamless.AI priced?
- People Data Labs: Per enrichment credit. Seamless.AI: Per credit; sales-led Pro/Enterprise.
- Which has more official SDKs?
- People Data Labs lists 7 official SDKs, Seamless.AI lists 6.