Can I revoke a buyer's access to a data room if I stop trusting them?

Generally, yes — a data room is typically controlled by the seller, and access is usually granted at the seller's discretion rather than as an unconditional right the buyer has earned simply by starting due diligence. If you've become genuinely uncomfortable with a buyer, revoking or narrowing their access is usually within your rights, especially before any binding agreement locking in a defined diligence period has been signed.

Check first whether you've signed anything — a letter of intent or a separate exclusivity or access agreement — that specifically commits you to providing continued access for a defined period. If so, cutting access early could itself raise a breach question on your side, even if your concerns about the buyer are legitimate. Where no such commitment exists, you're generally free to pause, narrow, or end access as your comfort with the buyer changes, and doing so is a reasonable response to a real concern rather than something that needs extensive justification. A Treadstone business lawyer can check what you've already committed to before you act.