Head to head
FullContact vs Seamless.AI
As a data enrichment API, FullContact rates higher on the APIbenchmarks Index, 68.4 to 68.3, a 0.1-point gap. Here is how they compare on each criterion.
Criterion by criterion
| Criterion | FullContact | Seamless.AI |
|---|---|---|
| Documentation & DX | ||
| Reliability | ||
| Ecosystem & SDKs | ||
| Accessibility | ||
| APIbenchmarks Index | 68.4 | 68.3 |
Specifications
| FullContact | Seamless.AI | |
|---|---|---|
| Best for | Identity resolution / Identity Graph | Prospecting teams wanting UI plus API and MCP |
| Free tier | 100 API calls/mo (Developer plan) | Free plan (50 lifetime credits per third party; API eligibility unconfirmed) |
| Pricing | Per matched API call | Per credit; sales-led Pro/Enterprise |
| Official SDKs | 7 languages | 6 languages |
Is FullContact better than Seamless.AI?
On the APIbenchmarks Index, FullContact rates higher (68.4 vs 68.3). It leads on the four weighted criteria, but price is reported separately, so the best choice still depends on your budget.