Datacircle lists all the GTM APIsFind phone API benchmark
We called each provider once on the same 10 people, on 20 October 2026. Time is each call minus a baseline, so the distance to the provider's servers drops out.
| API | Score | Numbers found | Time per person | The phone call | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Provider | Data score | Performance score | Right number | Another number | No number | Median | 10th percentile | 90th percentile | Fastest | Slowest | Baseline | Call | Input | Charged per person |
| LeadMagic | 10 | 100 | 1 of 10 | 4 of 10 | 5 of 10 | 0.67 s | 0.37 s | 1.39 s | 0.25 s | 1.50 s | 0.39 s | POST api.leadmagic.io/v1/people/mobile-finder | Work email, LinkedIn URL | 5 credits, nothing when not found |