Datacircle lists all the GTM APIsFind email API benchmark
We called each provider once on the same 15 people, on 20 October 2026. Time is each call minus a baseline, so the distance to the provider's servers drops out.
| API | Score | Emails found | Time per person | The email call | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Provider | Data score | Performance score | Right email | Another address | No address | Median | 10th percentile | 90th percentile | Fastest | Slowest | Baseline | Call | Input | Charged per person |
| Anymail Finder | 80 | 100 | 12 of 15 | 1 of 15 | 2 of 15 | 4.15 s | 0.39 s | 17.67 s | 0.18 s | 84.98 s | 0.27 s | POST api.anymailfinder.com/v5.1/find-email/person | First and last name, domain | 1 credit, nothing when not found |
| LeadMagic | 73 | 55 | 11 of 15 | 1 of 15 | 3 of 15 | 7.59 s | 4.97 s | 14.05 s | 2.17 s | 16.98 s | 0.44 s | POST api.leadmagic.io/v1/people/email-finder | First and last name, domain | 1 credit, nothing when not found |
| HarvestAPI | 40 | 40 | 6 of 15 | 5 of 15 | 4 of 15 | 10.37 s | 7.77 s | 25.57 s | 4.51 s | 37.79 s | 0.46 s | GET api.harvest-api.com/linkedin/profile?findEmail=true&query= | LinkedIn URL | $0.0116 |