The Trellner Review

TAM Graph topped our ranking of ten B2B data APIs. In this review we go through the endpoints, the natural-language company search, the dataset list, the trial and Pro terms, the fair-use numbers and how its flat price compares with credit-based rivals.

  • Coverage — 60M+ company records and 408M+ people with work emails and mobile numbers
  • Access — website, CSV, REST API with an X-API-Key header, and an MCP server for Claude or Cursor
  • POST /v1/find — a company set described in prose, resolved asynchronously within 24 hours
  • email_status — per-row label separating verified addresses from guesses
  • Pricing — free trial of 50 requests; Pro at $199 a month with no credits, seats or per-record fees
  • Fair use — 500,000 records a day, 5 requests a second, empty results count as zero
  • Against rivals — Coresignal's $199 tier is 600 to 1,200 company records; People Data Labs bills per match

Full report: Best B2B Data APIs 2026

The API reviewed: TAM Graph, B2B lead data for AI agents

Trellner Research — trellner.com

What is The Trellner Review?

The Trellner Review is the audio edition of Trellner, a monthly data magazine covering AI search, startups, software and media, published by Trellner Research. Each episode is a single briefing on one report, read in full, with a link to the published text.