Business · case study October 16

ChatGPT tripled Stack Overflow sign-ups; it's self-reported

In an OpenAI customer story, Stack Overflow product VP Alexandra Lato says registrations for Stack Overflow for Agents "tripled overnight" after it built a ChatGPT plugin. Lato says: "We built a ChatGPT plugin for Stack Overflow for Agents, and our registrations tripled overnight." (OpenAI, 2026-10-16) Stack Overflow for Agents is a new product that makes Stack Overflow's knowledge available to AI agents. The baseline and time window for the tripling aren't given. On October 7 OpenAI also published a plugin case study from Radisson hotels. Visitors arriving through the ChatGPT plugin converted to bookings at about 1.5 times the rate of Radisson's organic-search visitors, over July and August (OpenAI, 2026-10-07). Both cases come from the same publisher, and both sets of numbers are the customer's own account with no base figures. How we checked →

Concept illustration on a beige background: at upper left, a cream sign lettered CHATGPT with a green interlaced-loop symbol beside the text, and below it a grey laptop whose screen shows a chat window with grey message bubbles and, in the left sidebar, a red tile with a white puzzle piece. At right, a large cream speech bubble with its tail pointing down to a cream sign lettered STACK OVERFLOW, which has an icon of orange slanted bars over a grey tray; inside the bubble, one card with grey bars and a blue button is followed by a grey arrow pointing right to three identical cards.

Source and checks

This item ran in the brief of Oct 17, 2026, alongside 15 other items. How we checked it, the quote checks and what was still missing that day are on that issue's How we checked page.

Cite this item

SecondSource (2026). "ChatGPT tripled Stack Overflow sign-ups; it's self-reported." https://secondsource.io/en/product/2026-10-17-1/. Accessed access date.