PasteProof

PasteProof is a data loss prevention (DLP) platform designed to prevent accidental leaks of sensitive information across browsers, APIs, Slack, and AI workflows. The platform addresses the risk of users unintentionally pasting or sharing confidential data such as credit card numbers, API keys, personal data, and social security numbers in the wrong context or application. PasteProof aims to stop these leaks before they happen, providing real-time detection and alerts to safeguard sensitive information at the point of egress.

The tool offers a browser extension for Chrome and Firefox that monitors form inputs as users type or paste data, alerting them instantly if sensitive information is detected before submission. The extension can identify a variety of data types, including credit card details and personal identifiers, and provides options to anonymize or cancel the submission. PasteProof employs AI-driven, context-aware detection to distinguish between legitimate and risky data sharing, reducing false positives by understanding whether data is test information, debugging output, or production secrets.

Beyond browser protection, PasteProof extends its DLP capabilities through REST API endpoints and integrations with Slack. The Slack integration, available as a free installation for all Slack plans, monitors messages in real-time, scanning for sensitive content and issuing immediate alerts when potential data leaks are detected. The platform also provides an LLM gateway to govern prompts and completions in AI workflows, ensuring that secrets do not reach language models and that risky content is not returned unchecked. Policies can be extended across these multiple surfaces, allowing teams to maintain a consistent approach to data protection.

PasteProof is available with a free forever tier and does not require a credit card to get started. Subscriptions are optional, and the platform is free for everyone until July 1st, 2027. For organizations with data residency requirements, PasteProof offers on-premise deployment. The service emphasizes privacy by minimizing data retention, anonymizing personally identifiable information before storage, and committing not to sell user data.