Terms & Conditions
Effective date: 1 May 2025
Please read these Terms and Conditions carefully before using the Grepsi Security Threat Modelling tool at grepsi-sec.com/threat-model (the “Tool”).
By accessing or using the Tool you agree to be bound by these Terms. If you do not agree, do not use the Tool.
1. About the Tool
The Tool is a free, open-source, browser-based application for performing structured security threat analysis. All data you enter is stored locally in your browser and is never transmitted to Grepsi Security or any third party (subject to clause 5 regarding hosting infrastructure).
Contact: info@grepsi-sec.com
2. Licence and Permitted Use
The Tool and its source code are made available under the MIT Licence (see clause 8). You may use, copy, modify, and distribute the Tool in accordance with the MIT Licence.
You agree not to:
- Use the Tool for any unlawful purpose
- Attempt to compromise, disrupt, or attack the hosting infrastructure
- Represent the Tool or its outputs as certified, audited, or guaranteed threat intelligence
3. No Warranties — Informational Use Only
The Tool and all content on this site are provided “as is” and “as available”, without warranty of any kind, express or implied.
This includes, without limitation, no warranty of:
- Merchantability or fitness for a particular purpose
- Accuracy, completeness, or currency of threat modelling guidance
- Freedom from errors, bugs, or interruptions
Threat modelling is a professional discipline. The outputs of this Tool represent a starting point for analysis, not a substitute for qualified security expertise. Do not rely solely on this Tool to assess the security of production systems, critical infrastructure, or regulated environments.
4. Limitation of Liability
To the fullest extent permitted by applicable law, Grepsi Security shall not be liable for any:
- Direct, indirect, incidental, or consequential damages
- Loss of data, revenue, profit, or business opportunity
- Security breaches or incidents arising from reliance on Tool outputs
- Damages arising from use of exported threat model data
Your use of the Tool and any reliance on its outputs is entirely at your own risk.
5. Data and Privacy
Your threat model data never leaves your browser. Grepsi Security does not collect, store, or process your threat model content.
Our hosting provider Cloudflare, Inc. processes connection metadata (IP address, browser type, request timestamps) in the course of delivering pages. See our Privacy Policy for details.
6. Intellectual Property
The Grepsi Security name, logo, and brand elements are the property of Grepsi Security. The underlying open-source tool is licensed under the MIT Licence.
7. Changes to These Terms
We may update these Terms from time to time. Material changes will be reflected in a new effective date at the top of this page. Continued use of the Tool after changes constitutes acceptance of the revised Terms.
8. Source Code Licences
Grepsi Security Threat Modelling Tool
The MIT License (MIT)
Copyright (c) 2025 Grepsi Security
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.Astrogon Template (Derivative Work)
This site is built on the Astrogon template by Reed Nelson.
The MIT License (MIT)
Copyright (c) 2025 Reed Nelson
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.9. Governing Law
These Terms are governed by the laws of England and Wales. Any disputes shall be subject to the exclusive jurisdiction of the courts of England and Wales.