Saerskriven

Saerskriven is an open-source threat modelling tool for developers to draw diagrams and document threats.

Saerskriven is an open-source threat modelling tool designed specifically for developers. It provides a browser editor and a command line interface with Model Context Protocol support. Users can draw data-flow diagrams, document threats and mitigations, and keep the resulting model directly with their source code. The product focuses on developer-friendly threat modelling workflows. It runs as a browser editor and a CLI.

Saerskriven at a glance

Best for: Software engineer
Runs on: Web, CLI
Pricing: Free
Released: October 2026
Category: AI coding tool
Website: saerskriven.com

Key features

Browser editor for diagrams
Command line interface
Model Context Protocol support
Data-flow diagram drawing
Threat and mitigation documentation
Code repository integration

Use it for

Draw data-flow diagrams
Document security threats
Record mitigation strategies
Keep threat models with code

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