At OpenAI’s DevDay 2025 opening keynote, CEO Sam Altman showcased a slide featuring the names of developers present at the event whose platforms have processed extraordinary volumes of tokens — in some cases exceeding 1 trillion. While the official slide only displayed participant names and not their companies or actual token counts, online communities quickly began piecing together which organizations these developers likely represent, resulting in a viral “Top 30 OpenAI Customers” list. (Source: X)
The reconstructed list, shared widely in tech circles, pairs the names from Altman’s slide with their affiliated companies. However, the order does not reflect actual usage or rankings, and OpenAI has not disclosed specific customer token volumes. Altman himself noted that these names are those physically at DevDay, meaning other major token-consuming OpenAI customers may not have been present.
This grassroots reconstruction has fueled industry chatter, with tech watchers highlighting the mix of enterprise giants, developer platforms, AI-powered SaaS tools, and consumer-facing apps known for heavy AI integration. While speculative, many of these companies have public partnerships or documented large-scale use of OpenAI APIs, making them plausible heavy token users.
The Reconstructed “Top 30” OpenAI Customers List
(Based on attendee names matched to companies; order not indicative of token usage)
- Duolingo
- OpenRouter
- Indeed
- Salesforce
- CodeRabbit
- iSolutionsAI
- Outtake
- Uber
- Ramp
- Abridge
- Sider AI
- Warp.dev
- Shopify
- Notion
- WHOOP
- HubSpot / Dashworks
- JetBrains
- Delphi
- Decagon
- Rox
- T-Mobile
- Zendesk
- Harvey
- Read AI
- Canva
- Cognition
- Datadog
- Perplexity
- Mercado Libre
- Genspark AI
Public Proxy List of Likely Large Token Users
So we ask ChatGPT about it, and it answers that “I can compile a speculative list of 30 companies that are publicly known to integrate heavily with OpenAI”. No token count. So here it goes:
(Speculative, based on public announcements and product needs; not an official ranking)
Enterprise / Cloud / Platform: Microsoft, Salesforce, AWS/Amazon, Google
Developer Tools / Productivity: Notion, Figma, GitHub, Atlassian
Communications / CRM: Zendesk, HubSpot
Search / Knowledge / Social: Reddit, Quora, Wikimedia projects
E-Commerce / Marketplaces: Shopify, Etsy, Instacart
Media / Content / Streaming: Spotify, Netflix, major publishers
Education: Duolingo, Coursera, Khan Academy
Design / Creativity: Canva, Adobe
Retail & Travel: Booking.com, Zillow
Finance & Professional: Morgan Stanley, Bloomberg
Other SaaS / Infrastructure: Datadog, Stripe
OpenAI has not confirmed this list, and token usage data remains confidential. The viral chart nonetheless offers a snapshot of the breadth of industries — from education to enterprise software — integrating large-scale AI capabilities into their products.
