runsonwhat

OpenAI's tech stack

What does OpenAI use?

OpenAI (openai.com) uses at least 62 tools we can see from public records, including Vercel for hosting, Microsoft 365 for email and documents, HubSpot for sales and Intercom for customer support. Last checked .

Industry
Artificial Intelligence
Size
1,001–5,000 employees
Based in
United States
Founded
2015
LinkedIn
Company page
Re-check liveVisit openai.com
Tools found
62
Categories
20
Oldest proven tool
Feb 2025
Last checked
Oct 2026

OpenAI's stack, layer by layer

Each tool links to the other companies we've found using it. The label says what kind of public trace gave it away.

Edge & Hosting

3 tools, where the bytes are served from

Hosting & Cloud

CDN & Edge

Application

6 tools, what the product is built with

Frontend

Auth & Identity

Backend & Database

Payments & Billing

Media & UI

Data & Observability

2 tools, what they measure and store

Analytics

Flags & Experiments

Go-to-market

13 tools, how they find and keep customers

Website & CMS

Marketing

Sales & CRM

Support & Docs

Company Ops

38 tools, what the team runs on day to day

Email Delivery

Workspace

Collaboration

Dev Tools

Finance & Legal

Security & Compliance

Other traces

What changed at OpenAI

Using since

Dates come from the first certificate of the subdomain that points at the tool.

  1. Gradual

Companies like OpenAI also use

Tools common among companies with a similar stack that we haven't found at OpenAI.

Companies with a stack like OpenAI's

Ranked by shared tools, with rare tools counting more.

OpenAI tech stack FAQ

What tools does OpenAI use?

We've found 62 tools at OpenAI (openai.com). Edge & Hosting: Cloudflare, Vercel and Microsoft Azure. Application: Next.js, Stripe and Twilio. Data & Observability: Segment and Statsig. Go-to-market: HubSpot, Salesforce and Marketo. Company Ops: Microsoft 365, Google Workspace and SendGrid. Last checked October 2, 2026.

What cloud does OpenAI run on?

OpenAI uses Vercel and Microsoft Azure for hosting. We found Vercel through custom domain, DNS verification records and website code.

What CRM does OpenAI use?

OpenAI uses HubSpot, Salesforce and Calendly for sales and CRM, among 4 tools in this category. We found HubSpot through email records.

What email provider does OpenAI use?

OpenAI uses Microsoft 365, Google Workspace and Apple Business for email and documents. We found Microsoft 365 through DNS verification records and email records.

What does OpenAI use for customer support?

OpenAI uses Intercom, Discord and Discourse for customer support, among 5 tools in this category. We found Intercom through email records.

What payment provider does OpenAI use?

OpenAI uses Stripe for payments. We found Stripe through DNS verification records and custom domain.

Does OpenAI use Microsoft 365?

Yes. We found Microsoft 365 at OpenAI through DNS verification records and email records. Microsoft 365 is used by 245,233 companies we track.

How does runsonwhat know what OpenAI uses?

We read public traces only: OpenAI's DNS and email records, certificate logs, the code its website loads, and published subprocessor lists. A tool is listed only when a direct record backs it up. DNS is rechecked weekly and the website monthly.

We read public traces only: DNS and email records, certificate logs, website code and published subprocessor lists. A tool is listed when a direct record backs it up, and dropped when a recheck no longer finds it. Is this your company? See how to opt out.