CAIRIS vs OWASP Threat Dragon

CAIRIS is an open-source platform for specifying and checking systems with security and usability requirements in view. It brings together design information such as assets, countermeasures, factoids, personas, requirements, and architectural components. As a design develops, it can generate 12 views covering perspectives such as people, risks, requirements, architecture, and physical location, as well as threat models including Data Flow Diagrams. Its security analysis uses attack and architectural patterns to assess attack surface and check for known security problems and potential GDPR compliance issues. CAIRIS can produce Volere-compliant requirement specifications and GDPR DPIA documents. Its API supports design apps and connections to existing toolchains. It is free under the Apache Software License. Deployment options include Docker, Vagrant, or source installation on supported platforms; Ubuntu is the most tested. The web app supports modern browsers other than Internet Explorer, including Edge. A Chrome extension can turn highlighted webpage text into references linked to a CAIRIS server. The live demo is rebuilt nightly, and its data is visible to everyone.

OWASP Threat Dragon creates threat-model diagrams and records threats associated with diagram elements as part of a secure development lifecycle. Diagrams can represent processes, data stores, actors, data flows and trust boundaries. It supports STRIDE, LINDDUN, CIA, CIA-DIE, DIE and PLOT4ai threat categories. A rule engine can propose threats and mitigations based on properties of diagram elements. Threat Dragon can run as a containerized, self-hosted web application or as a desktop app with installers for Windows, macOS and Linux. The web app supports local file storage and configurable access to GitHub, GitHub Enterprise, Google Drive, Bitbucket, Bitbucket Enterprise and GitLab; the desktop app saves models locally. The project lists Apache License 2.0. Analytics are disabled by default and require server configuration. The project is volunteer-maintained and notes that immediate investigation or response to incidents is not always possible. Threat Dragon is listed at free, with no paid plans or usage limits stated.