Head to head
ContactOut vs Seamless.AI
As a data enrichment API, Seamless.AI rates higher on the APIbenchmarks Index, 68.3 to 55, a 13.3-point gap. Here is how they compare on each criterion.
Criterion by criterion
| Criterion | ContactOut | Seamless.AI |
|---|---|---|
| Documentation & DX | ||
| Reliability | ||
| Ecosystem & SDKs | ||
| Accessibility | ||
| APIbenchmarks Index | 55.0 | 68.3 |
Specifications
| ContactOut | Seamless.AI | |
|---|---|---|
| Best for | LinkedIn-based email and phone lookup for recruiters and sales | Prospecting teams wanting UI plus API and MCP |
| Free tier | 5 emails, 5 phones, 5 exports/day in the app; API not included | Free plan (50 lifetime credits per third party; API eligibility unconfirmed) |
| Pricing | Credits (search, email, phone) on a quoted API plan | Per credit; sales-led Pro/Enterprise |
| Official SDKs | 4 languages | 6 languages |
Is ContactOut better than Seamless.AI?
On the APIbenchmarks Index, Seamless.AI rates higher (68.3 vs 55). It leads on the four weighted criteria, but price is reported separately, so the best choice still depends on your budget.