Rebuff AI Defense Pricing 2026: Plans, Costs & Free Options
Last Updated: May 2026
Open-source self-hardening prompt injection detection framework with multi-layer defense. This page breaks down Rebuff AI Defense's Free/OSS pricing model, what it includes, and how it compares to free alternatives in the AI Security & LLM Safety category.
Pricing Overview
Pricing Model
Free/OSS
This means the tool is free to use and typically open-source — you self-host it, customize it, and pay nothing for the software itself.
Is Rebuff AI Defense Free?
Yes, Rebuff AI Defense is completely free and open-source. You can download, use, and modify it without paying any license fees.
Is Rebuff AI Defense Worth It?
Rebuff AI Defense is rated 4.1/5 in our AI Security & LLM Safety directory and is completely free, which makes it an easy recommendation for any team that can self-host and manage their own deployment. You get full functionality without licensing costs, though you trade vendor support for community forums and documentation. For AI Security & LLM Safety workflows, Rebuff AI Defense delivers strong value, especially for individuals, students, and budget-conscious teams. The main consideration is operational overhead — you own the install, updates, and tuning. If your team has the technical capacity, Rebuff AI Defense is well worth adopting.
Cheaper Alternatives
If Rebuff AI Defense's pricing is out of budget, these AI Security & LLM Safety tools offer free or freemium options:
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Lakera Guard
Freemium
Lakera Guard protects LLMs from prompt injection, jailbreaks, and data leaks in real time via a simple API. Free tier available. Full review with pricing and alternatives.
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Nightfall AI for LLMs
Freemium
AI-native DLP for ChatGPT, Copilot and LLM apps preventing sensitive data leakage in prompts.
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Garak LLM Scanner
Free/OSS
Open-source LLM vulnerability scanner testing for prompt injection jailbreaks and safety failures.
Frequently Asked Questions
How much does Rebuff AI Defense cost?
Rebuff AI Defense uses a Free/OSS pricing model. This means the tool is free to use and typically open-source — you self-host it, customize it, and pay nothing for the software itself. For exact current pricing, visit the Rebuff AI Defense website directly — vendors update tiers and quotas regularly.
Is there a free version of Rebuff AI Defense?
Yes, Rebuff AI Defense is completely free and open-source. You can download, use, and modify it without paying any license fees.
What are cheaper alternatives to Rebuff AI Defense?
In the AI Security & LLM Safety category, the most popular free or freemium alternatives are Lakera Guard, Nightfall AI for LLMs, Garak LLM Scanner. Each offers a comparable feature set at lower or zero cost — see our /alternatives page for full breakdowns.