# SeaSponge

SeaSponge is a Threat Modeling product. It runs in the cloud. Pricing is free.

SeaSponge is an accessible web-based threat modeling tool with a focus on accessibility, aesthetics, and intuitive user experience.

Checked October 2026.

## What is SeaSponge?

SeaSponge is an accessible web-based threat modeling tool developed for Mozilla Winter of Security 2014. This web-based application is being developed with three characteristics in mind: Accessibility: We want everyone to be able to map out their infrastructures and generate security reports on any operating-system and on any browser. Aesthetics: We're tired of clunky, boring interfaces - we want to bring the pizazz into threat-modeling. Intuitive User-Experience: We hate manuals, and we want you to be able to use this software without one. Please see http://mozilla.github.io/seasponge/ for a live demo of the application. There is also a video on Air Mozilla available at https://air.mozilla.org/mozilla-winter-of-security-seasponge-a-tool-for-easy-threat-modeling/ Example Threat Model developed with SeaSponge Here is a share link for the SeaSponge threat model we developed in our Air Mozilla demo video: http://goo.gl/Q8mt0T Usage See our Usage page in our Wiki for more details. Authors Mathew Kallada Glavin Wiechert Joel Kuntz Sarah MacDonald With Mozilla Advisor Curtis Koenig and Professor Dr. Pawan Lingras Contributing Please see our Contributing Guidelines

Tags: Security Reporting, Threat Modeling

## Where it fits in your security program (NIST CSF 2.0)

- [Identify](https://cybersectools.com/guides/building-identify-program-small-team): helps you know your assets and your risks.

## Quick facts

- Category: [Application Security](https://cybersectools.com/categories/application-security) · [Threat Modeling](https://cybersectools.com/categories/threat-modeling)
- Deployment: Cloud
- Company size fit: Startup, SMB, Mid-Market
- Pricing model: Free
- GitHub stars: 281
- Website: github.com

## Where it ranks

No shortlist covers this product's category yet. The closest is [Best Application Security Solutions for Business](https://cybersectools.com/shortlists/best-application-security-solutions).

## SeaSponge FAQ

### What is SeaSponge?

SeaSponge is a product in the Threat Modeling category. It covers Security Reporting and Threat Modeling.

### What is the pricing for SeaSponge?

SeaSponge is free. Download and setup instructions are at https://github.com/mozilla/seasponge/.

### What are alternatives to SeaSponge?

Alternatives to SeaSponge listed on CybersecTools:

1. [TTModeler Pro](https://cybersectools.com/tools/ttmodeler-pro) - Threat modeling & risk assessment tool for embedded systems and IoT. (Commercial)
2. [Apiiro AI-Powered Risk Detection](https://cybersectools.com/tools/apiiro-ai-powered-risk-detection) - AI-powered pre-development risk detection for secure-by-design software (Commercial)
3. [Heeler Runtime Threat Modeling](https://cybersectools.com/tools/heeler-runtime-threat-modeling) - AI-powered continuous threat modeling for cloud applications in runtime (Commercial)
4. [GrammaTech ConfINE](https://cybersectools.com/tools/grammatech-confine) - Framework for modeling access control and attack graphs in networked systems (Commercial)
5. [Avertro Threat Modeling and Simulation](https://cybersectools.com/tools/avertro-threat-modeling-and-simulation) - AI-driven threat modeling & simulation platform using MITRE ATT&CK framework (Commercial)

Compare all SeaSponge alternatives at [https://cybersectools.com/alternatives/seasponge](https://cybersectools.com/alternatives/seasponge)

### What deployment and organization size does SeaSponge fit?

SeaSponge is available as a cloud service. It is listed for startups, small businesses and mid-market companies. It is free.

## Compare SeaSponge with similar solutions

- [SeaSponge vs TTModeler Pro](https://cybersectools.com/compare/seasponge-vs-ttmodeler-pro)
- [SeaSponge vs Apiiro AI-Powered Risk Detection](https://cybersectools.com/compare/apiiro-ai-powered-risk-detection-vs-seasponge)
- [SeaSponge vs Heeler Runtime Threat Modeling](https://cybersectools.com/compare/heeler-runtime-threat-modeling-vs-seasponge)

All alternatives to SeaSponge: [/alternatives/seasponge](https://cybersectools.com/alternatives/seasponge)

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Source: https://cybersectools.com/tools/seasponge

For AI agents: every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md, and any compare page has a Markdown copy too (add .md to its URL).

More on SeaSponge: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=product-md