--- title: "AgentGuard vs rebuff" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/dipampaul17-agentguard-vs-protectai-rebuff" tools: ["dipampaul17-agentguard", "protectai-rebuff"] --- # AgentGuard vs rebuff *GraphCanon updated Aug 9, 2026* ## Verdict Pick AgentGuard if agentGuard is a budget-conscious observer for real-time token spending by AI agents and LLMs, integrating with major providers like OpenAI and Anthropic; pick rebuff if rebuff is a detector for prompt injection attacks on large language models and operates in TypeScript under an Apache-2.0 license. [AgentGuard](https://github.com/dipampaul17/AgentGuard) reports 171 GitHub stars, 10 forks, and 1 open issues, last pushed Jul 31, 2025. [rebuff](https://playground.rebuff.ai) has 1.5k stars, 141 forks, and 33 open issues, last pushed Aug 7, 2024. Figures are from public GitHub metadata via [AgentGuard's repository](https://github.com/dipampaul17/AgentGuard) and [rebuff's repository](https://github.com/protectai/rebuff). | | [AgentGuard](/tools/dipampaul17-agentguard.md) | [rebuff](/tools/protectai-rebuff.md) | | --- | --- | --- | | Tagline | Real-time guardrail that monitors token spend and manages LLM/agent loops in real time | LLM Prompt Injection Detector | | Stars | 171 | 1,516 | | Forks | 10 | 141 | | Open issues | 1 | 33 | | Language | JavaScript | TypeScript | | Adopt for | AgentGuard is a budget-conscious observer for real-time token spending by AI agents and LLMs, integrating with major providers like OpenAI and Anthropic. | Rebuff is a detector for prompt injection attacks on large language models and operates in TypeScript under an Apache-2.0 license. | | Persona | - | - | | Runtime | - | - | | License | MIT | Apache-2.0 | | Categories | Evaluation & Observability, Inference & Serving | Evaluation & Observability | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [AgentGuard](/tools/dipampaul17-agentguard.md) | [rebuff](/tools/protectai-rebuff.md) | | --- | --- | --- | | Maintenance | Dormant (18%) | Archived (8%) | | Days since push | 373d | 727d | | Archived on GitHub | No | Yes | | Open issues (now) | 1 | 33 | | Owner type | User | Organization | | Full report | [trust report](/tools/dipampaul17-agentguard/trust.md) | [trust report](/tools/protectai-rebuff/trust.md) | ## Shared compatibility - **Node.js**: [AgentGuard](/tools/dipampaul17-agentguard.md) - Node.js runtime; [rebuff](/tools/protectai-rebuff.md) - Node.js runtime ## Decision facts: AgentGuard - **Adopt for:** AgentGuard is a budget-conscious observer for real-time token spending by AI agents and LLMs, integrating with major providers like OpenAI and Anthropic. ## Decision facts: rebuff - **Adopt for:** Rebuff is a detector for prompt injection attacks on large language models and operates in TypeScript under an Apache-2.0 license. ## Choose when ### Choose AgentGuard if… - AgentGuard is primarily JavaScript; rebuff is TypeScript. - License: AgentGuard is MIT, rebuff is Apache-2.0. - Tags unique to AgentGuard: ai-agents, anthropic, cost-monitoring, observability. - Also covers Inference & Serving. - When you need precise control over spend and want live updates on token prices ### Choose rebuff if… - rebuff is primarily TypeScript; AgentGuard is JavaScript. - License: rebuff is Apache-2.0, AgentGuard is MIT. - Tags unique to rebuff: llm, llmops, prompt-engineering, prompt-injection. - Use Rebuff when you need precise detection of prompt injection vulnerabilities specific to your deployment, especially if it relies heavily on interactions with large language models. ## When NOT to use AgentGuard - If you prioritize a different language for your project and cannot use JavaScript - In cases requiring more elaborate fallback mechanisms than what AgentGuard offers ## When NOT to use rebuff - Do not use Rebuff if setting up and managing multiple provider services like Supabase, OpenAI, Pinecone, or Chroma is inconvenient or infeasible for your project requirements. ## Common questions ### What is the difference between AgentGuard and rebuff? AgentGuard: Real-time guardrail that monitors token spend and manages LLM/agent loops in real time. rebuff: LLM Prompt Injection Detector. See the comparison table for live GitHub stats and shared categories. ### When should I choose AgentGuard over rebuff? Choose AgentGuard over rebuff when AgentGuard is primarily JavaScript; rebuff is TypeScript; License: AgentGuard is MIT, rebuff is Apache-2.0; Tags unique to AgentGuard: ai-agents, anthropic, cost-monitoring, observability; Also covers Inference & Serving; When you need precise control over spend and want live updates on token prices. ### When should I choose rebuff over AgentGuard? Choose rebuff over AgentGuard when rebuff is primarily TypeScript; AgentGuard is JavaScript; License: rebuff is Apache-2.0, AgentGuard is MIT; Tags unique to rebuff: llm, llmops, prompt-engineering, prompt-injection; Use Rebuff when you need precise detection of prompt injection vulnerabilities specific to your deployment, especially if it relies heavily on interactions with large language models. ### When should I avoid AgentGuard? If you prioritize a different language for your project and cannot use JavaScript In cases requiring more elaborate fallback mechanisms than what AgentGuard offers ### When should I avoid rebuff? Do not use Rebuff if setting up and managing multiple provider services like Supabase, OpenAI, Pinecone, or Chroma is inconvenient or infeasible for your project requirements. ### Is AgentGuard or rebuff more popular on GitHub? rebuff has more GitHub stars (1,516 vs 171). Stars measure visibility, not whether either tool fits your constraints. ### Are AgentGuard and rebuff open source? Yes - both are open-source projects on GitHub (AgentGuard: MIT, rebuff: Apache-2.0). ### Where can I find alternatives to AgentGuard or rebuff? GraphCanon lists graph-backed alternatives at [AgentGuard alternatives](/tools/dipampaul17-agentguard/alternatives) and [rebuff alternatives](/tools/protectai-rebuff/alternatives) ([AgentGuard markdown twin](/tools/dipampaul17-agentguard/alternatives.md), [rebuff markdown twin](/tools/protectai-rebuff/alternatives.md)), ranked by typed relationship edges rather than popularity votes. ### Is there a machine-readable version of this comparison? Yes. The markdown twin at [this comparison](/compare/dipampaul17-agentguard-vs-protectai-rebuff.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, AgentGuard or rebuff? AgentGuard: Dormant. rebuff: Archived. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance. ### Where are the full trust reports for AgentGuard and rebuff? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [AgentGuard trust report](/tools/dipampaul17-agentguard/trust); [rebuff trust report](/tools/protectai-rebuff/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=dipampaul17-agentguard`](/api/graphcanon/graph?tool=dipampaul17-agentguard) - LLM index: [/llms.txt](/llms.txt) - Full corpus: [/llms-full.txt](/llms-full.txt) _GraphCanon - The knowledge graph for AI development. https://www.graphcanon.com/_