What happens to the client data in that contract when you paste it into ChatGPT? For most people using AI assistants for professional work, that question doesn't have a clean answer.
MAIsk is a web tool designed to give it one. Before text reaches any AI service, MAIsk scans it for identifying information - names, email addresses, phone numbers, financial details - and replaces each with an anonymous placeholder. "Sarah Johnson at sarah@company.com" becomes "PERSON_1 at EMAIL_1". The AI sees and processes the anonymized version. When the response comes back, MAIsk swaps the placeholders in, so you read real names in the output.
The target use cases are obvious: legal teams summarizing contracts, HR staff reviewing performance notes, healthcare admins working with patient records. These are professionals who want AI assistance but can't pipe raw sensitive data through a consumer service without creating GDPR or HIPAA exposure.
The anonymization appears to run client-side in the browser, which is the right architecture - the original data shouldn't touch MAIsk's servers if privacy is the entire value proposition. The site doesn't list pricing as of this writing, suggesting early-access status.
Two things worth verifying before relying on this professionally. First, the coverage rate - does it catch all the identifiers it claims to catch, consistently? A tool that misses one in fifty emails is worse than not using it, because it creates false confidence. Second, whether client-side anonymization actually satisfies your specific compliance requirements - in regulated industries, "we used a browser tool" won't be a sufficient answer without documentation.
Enterprise-grade alternatives like Microsoft Presidio (open-source) and Nightfall AI handle this problem at the infrastructure level. MAIsk is pitched at individual professionals who need something they can use today without an IT procurement process.