ChatGPT Business (OpenAI) vs Microsoft 365 Copilot Business
Side-by-side from the Top 11 ranking of ChatGPT vs Microsoft Copilot vs Zapier Agents: 11 Best AI Agents for Small Business 2026. Last verified September 12, 2026.
The short answer
ChatGPT Business (OpenAI) ranks higher on Top 11 (#1 vs #4) for Owners, founders and operations leads at United States companies under 500 people who have decided to buy an AI agent, have no engineer on staff, and want to know which one to pay for, what it costs at five or fifty people, and which of them is wrong for their business.. The shortest distance from a problem in plain English to an agent doing something about it. $20 a seat.
At a glance
| ChatGPT Business (OpenAI) | Microsoft 365 Copilot Business | |
|---|---|---|
| Top 11 rank | #1 / ChatGPT vs Microsoft Copilot vs Zapier Agents: 11 Best AI Agents for Small Business 2026 | #4 / ChatGPT vs Microsoft Copilot vs Zapier Agents: 11 Best AI Agents for Small Business 2026 |
| Score (out of 9.4) | 8.6 | 7.6 |
| Best for | Small teams that want a working agent today and have nobody to build one | Companies already on Microsoft 365 whose work lives in Outlook, Excel and Teams |
| Pricing | $$ (Standard seat $20 per user per month billed annually, $25 billed monthly; Premium seat $100 annually, $125 monthly; minimum two seats) | $$ (Microsoft 365 Copilot Business $18.00 per user per month paid yearly, promotional against a standard $21.00, or $25.20 month to month; the full Microsoft 365 Copilot is $30.00 per user per month paid yearly; Copilot Studio credit packs $200.00 for 25,000 credits a month) |
| HQ | San Francisco, California | Redmond, Washington |
| Founded | — | — |
ChatGPT Business (OpenAI)
The shortest distance from a problem in plain English to an agent doing something about it. $20 a seat.
openai.com/business/Microsoft 365 Copilot Business
Cheapest agent to deploy if you already run Microsoft, because deployment is a licence change.
www.microsoft.com/en-us/microsoft-365-copilot/businessMethodology and scoring weights live at /methodology. No vendor pays for placement — see about.