The Companies API
What ChatGPT, Claude, Gemini & Grok actually say · September 2026
The verdict
The Companies API appears in 1 AI-ranked category.
Purpose-built for exactly the domain/company enrichment a signup flow needs — real-time company lookup from email domain, developer-friendly REST with usage-based pricing and no enterprise contract, good international company coverage where US-centric incumbents thin out.
Where The Companies API falls short, per the models
- Claude Company-only (no person/contact enrichment) and a younger dataset with less battle-tested accuracy — you'll pair it with another source for people data or deep US firmographics.
Top alternatives per the models: Clearbit · People Data Labs · Apollo.io · ZoomInfo
Watch The Companies API
Boards re-poll weekly and the models change their minds. One short email only when The Companies API's standing moves — a rank change, a rival overtaking, or new reasoning from the models. Nothing otherwise.
Embed your ranking badge
The Companies API ranks #6 for best company enrichment apis for routing product-led growth signups by AI-model consensus. Put the badge in your README, docs or site — it updates automatically as the models re-rank.
[](https://modelsagree.com/best/best-company-enrichment-apis-for-routing-product-led-growth-signups?utm_source=badge&utm_medium=embed&utm_campaign=badge-the-companies-api)<a href="https://modelsagree.com/best/best-company-enrichment-apis-for-routing-product-led-growth-signups?utm_source=badge&utm_medium=embed&utm_campaign=badge-the-companies-api"><img src="https://modelsagree.com/badge/the-companies-api.svg" alt="The Companies API — ranked #6 for Best company enrichment APIs for routing product-led growth signups by AI models on ModelsAgree" height="28"></a>Rankings are computed from what the models answer, re-polled on demand · raw reasoning shown verbatim · methodology