13 / AI communication controls
ZeroDrift
The useful moment to catch a bad message is before it leaves.

A check in the send path
ZeroDrift checks AI-generated communications against regulations and company policies. Its Anchor system combines a small language model with a rules engine. The possible decisions are to pass, rewrite, block or escalate a message.
Its published architecture says rewritten messages are checked again and decisions cite the relevant rule. An API lets other applications request a decision before releasing an output.
Where the technical value sits
I would test the difference between an exact rule and a judgment call. A restricted product name can be matched directly. A misleading promise may depend on the audience, context and wording. Combining both approaches makes sense, provided the final decision is explainable.
Rewriting creates a second responsibility. The new message needs to satisfy the rule without changing the sender’s intended meaning. I would compare the original and corrected versions and test whether an uncertain case reaches a person.
Because the check sits before sending, failure behaviour matters. If the service is unavailable, does the application wait, block or allow the message through? The customer should choose that policy deliberately. It should not be an accidental timeout setting.
The business model and moat
The buyer is trying to use AI communications without creating a larger review burden. The commercial value is a dependable decision at the moment it is needed, with evidence that a reviewer can follow.
The potential moat is maintained policy knowledge, well-tested decisions and integrations across the places messages leave a business. A generic prompt can ask an AI to be careful. A dependable control needs much more specific behaviour.
I would examine the cost and delay per check, alongside . Frequent unnecessary blocks can push users away from the control. Reliable handling of exceptions is part of the economics as well as the user experience.
My take
I like the focus on a clear moment in the workflow. It is easy to explain why the product exists. I would want its direction to remain grounded in specific, testable rules and good evidence, with people deciding the cases where context is uncertain.
Public financing
a16z speedrun publicly lists ZeroDrift as a portfolio company.
- a16z speedrun
Gold marks my selection of established, tier-one VC backers. It is a personal classification.
There’s more to talk about.
Contact me to discuss ZeroDrift and explore these ideas in more depth.
Talk to Matthias