Companies that use ChatGPT Business Hub

Source: Analysis of tech stacks from 4,232 companies that use ChatGPT Business Hub

I noticed that companies using ChatGPT Business Hub look like young, technical, developer-centric startups. Resend, Mintlify, MCP, and Plain are all tools built by and for engineering-led teams, and Ashby is the recruiting platform of choice for fast-growing startups. My analysis shows this is a company that sells software, probably to other technical buyers, and moves quickly with a small team that adopts new tools early.

A few pairings stood out. Resend and Cold Email Infrastructure suggest a two-sided email motion: transactional email for the product and outbound email for pipeline. These companies appear to build their product and their sales engine at the same time. Mintlify and MCP point to a strong developer audience, since polished documentation and Model Context Protocol support mean the product is meant to be integrated with and used by other builders, often in AI workflows. Plain is the most striking signal at 323 times more likely. It is a support tool built for technical B2B teams, which tells me customer conversations are handled with the same engineering rigor as the product itself.

Taken together, the stack suggests a product-led company with a founder-led or lightly staffed sales motion layered on top. Documentation, APIs, and transactional email drive adoption, while cold outreach fills the top of the funnel. The presence of Ashby tells me they are hiring actively, which usually means seed to Series B. These teams are small, but they are growing and have money to spend.