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 the institute's published studies. Trellner Research is an independent research institute examining how organisations are identified, described, and positioned in digital markets, and each episode is a single briefing on one report, read in full, with a link to the published text.