Companies using OpenAI API: 116 startups hiring for it (Oct 2026)

116 of 412 venture-backed and growth companies mention OpenAI API in at least one currently open job post. Below are the 25 with the most roles mentioning it, each with a public job post as evidence. Companies that hire for a tool are investing in that stack now, which makes this list useful for account targeting, competitive displacement and partner sourcing.

Get the full list: all 412 companies × 93 tools, with role counts and the public job post that evidences each mention (CSV). One-time snapshot, $49 · Weekly refresh, $99/mo (new roles every Monday; add up to 50 companies and 10 tools of your choice). 7-day refund.
CompanyRoles mentioning OpenAI APIOpen rolesExample job post
OpenAI806806Technical Program Manager, Compute Infrastructure
Sierra187187Enterprise Sales Engineer
Cerebras123123FPGA Engineer
Zip122122Senior / Principal Product Manager
Vercel9090Account Executive, Commercial
Chainguard7777Commercial Account Executive - Benelux
Endor Labs3333Backend Software Engineer (Mid-Senior)
Linear3030Senior / Staff Fullstack Engineer
WorkOS2929Site Reliability Engineer
LiveKit2829Software Engineer, Agents
Braintrust2727Sales Development Representative
Ashby2263Mid Market Account Executive - EMEA (French Speaking)
Grafana Labs22114Engineering Manager - Observability | Germany | Remote
Anyscale2020Enterprise Account Executive
Databricks13894AI Automation Engineer
Persona1313Associate Commercial Counsel
Stripe12724Account Executive, AI Sales
Descript1111Account Executive
Elastic9376Agentic AI Engineer
Samsara9248AI Architect - GTM Systems
ClickUp750Senior AI Engineer - Multi-Agent Frameworks
Hopper720Senior Full Stack Engineer (Realtime & Voice) Customer Experience Plat
Okta7372Principal Machine Learning Engineer, SecureAI
Scale AI6183Frontier Agent Engineering Manager, Enterprise
MongoDB5405Application Engineer

91 more companies mention OpenAI API; they are in the full CSV.

Get the full list: all 412 companies × 93 tools, with role counts and the public job post that evidences each mention (CSV). One-time snapshot, $49 · Weekly refresh, $99/mo (new roles every Monday; add up to 50 companies and 10 tools of your choice). 7-day refund.