Launch HN: Alter (YC S25) – Access control for multi-user agents
A new startup called Alter, part of Y Combinator’s S25 batch, announced its product on Hacker News. The service offers access‑control mechanisms designed for AI agents that are used by multiple users, allowing teams to define and enforce permissions for each participant. By managing who can invoke or modify agent actions, Alter aims to improve security and collaboration in multi‑user AI workflows.