--- title: "openfirma vs prismor" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/firma-ai-openfirma-vs-prismorsec-prismor" tools: ["firma-ai-openfirma", "prismorsec-prismor"] --- # openfirma vs prismor *GraphCanon updated Sep 20, 2026* ## Verdict Pick openfirma if openfirma is a policy-enforcing sidecar for AI agents that uses Cedar policies to gate outbound calls, built in Rust under the GPL-3.0 license; pick prismor if prismor is a runtime firewall that safeguards AI frameworks against security breaches like prompt injection attacks and secret leaks. It supports Claude Code and Codex. [openfirma](https://firma-ai.github.io/openfirma/) reports 135 GitHub stars, 9 forks, and 8 open issues, last pushed Sep 11, 2026. [prismor](https://prismor.dev) has 343 stars, 35 forks, and 46 open issues, last pushed Sep 11, 2026. Figures are from public GitHub metadata via [openfirma's repository](https://github.com/Firma-AI/openfirma) and [prismor's repository](https://github.com/PrismorSec/prismor). | | [openfirma](/tools/firma-ai-openfirma.md) | [prismor](/tools/prismorsec-prismor.md) | | --- | --- | --- | | Tagline | Runtime enforcement boundary for AI agents with local sidecar | Runtime firewall for AI agents to prevent rogue tool calls and security breaches | | Stars | 135 | 343 | | Forks | 9 | 35 | | Open issues | 8 | 46 | | Language | Rust | Python | | Adopt for | Openfirma is a policy-enforcing sidecar for AI agents that uses Cedar policies to gate outbound calls, built in Rust under the GPL-3.0 license. | Prismor is a runtime firewall that safeguards AI frameworks against security breaches like prompt injection attacks and secret leaks. It supports Claude Code and Codex. | | Persona | - | - | | Runtime | - | - | | License | GPL-3.0 | Apache-2.0, permissive open-source license allowing free use and distribution under certain conditions. | | Categories | AI Agents, Evaluation & Observability | AI Agents, Evaluation & Observability | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [openfirma](/tools/firma-ai-openfirma.md) | [prismor](/tools/prismorsec-prismor.md) | | --- | --- | --- | | Open issues (now) | 8 | 46 | | Stars delta | +29 (30d) | +63 (30d) | | Open issues delta | -9 (30d) | +34 (30d) | | Full report | [trust report](/tools/firma-ai-openfirma/trust.md) | [trust report](/tools/prismorsec-prismor/trust.md) | ## Decision facts: openfirma - **Adopt for:** Openfirma is a policy-enforcing sidecar for AI agents that uses Cedar policies to gate outbound calls, built in Rust under the GPL-3.0 license. ## Decision facts: prismor - **Pricing:** freemium - Free with a commercial license for advanced features. - **Requirements:** Min 1 GB RAM - **Adopt for:** Prismor is a runtime firewall that safeguards AI frameworks against security breaches like prompt injection attacks and secret leaks. It supports Claude Code and Codex. - **License detail:** Apache-2.0, permissive open-source license allowing free use and distribution under certain conditions. ## Choose when ### Choose openfirma if… - openfirma is primarily Rust; prismor is Python. - License: openfirma is GPL-3.0, prismor is Apache-2.0. - Tags unique to openfirma: access-control, agentic-ai, authorization, cedar-policy. - When you need deterministic and call-level runtime enforcement that specifically leverages Cedar policies tailored for your needs. ### Choose prismor if… - prismor is primarily Python; openfirma is Rust. - License: prismor is Apache-2.0, openfirma is GPL-3.0. - Pricing: Free with a commercial license for advanced features.. - Requirements: Min 1 GB RAM. - Tags unique to prismor: agent-security, llm-security, prompt-injection, security-tools. - When you need a dedicated firewall for AI tools to block unauthorized calls. ## When NOT to use openfirma - Avoid if you prefer a solution not tightly coupled to Cedar policies, as Openfirma exclusively supports this policy framework. - Do not use if licensing is critical and you need permissive licenses, since Openfirma uses the GPL-3.0 license. ## When NOT to use prismor - Avoid if you do not use supported frameworks like Claude Code or Codex, as it might lack coverage. - Not suitable if you prioritize open-source contributions over runtime protection. ## Common questions ### What is the difference between openfirma and prismor? openfirma: Runtime enforcement boundary for AI agents with local sidecar. prismor: Runtime firewall for AI agents to prevent rogue tool calls and security breaches. See the comparison table for live GitHub stats and shared categories. ### When should I choose openfirma over prismor? Choose openfirma over prismor when openfirma is primarily Rust; prismor is Python; License: openfirma is GPL-3.0, prismor is Apache-2.0; Tags unique to openfirma: access-control, agentic-ai, authorization, cedar-policy; When you need deterministic and call-level runtime enforcement that specifically leverages Cedar policies tailored for your needs. ### When should I choose prismor over openfirma? Choose prismor over openfirma when prismor is primarily Python; openfirma is Rust; License: prismor is Apache-2.0, openfirma is GPL-3.0; Pricing: Free with a commercial license for advanced features.; Requirements: Min 1 GB RAM; Tags unique to prismor: agent-security, llm-security, prompt-injection, security-tools; When you need a dedicated firewall for AI tools to block unauthorized calls. ### When should I avoid openfirma? Avoid if you prefer a solution not tightly coupled to Cedar policies, as Openfirma exclusively supports this policy framework. Do not use if licensing is critical and you need permissive licenses, since Openfirma uses the GPL-3.0 license. ### When should I avoid prismor? Avoid if you do not use supported frameworks like Claude Code or Codex, as it might lack coverage. Not suitable if you prioritize open-source contributions over runtime protection. ### Is openfirma or prismor more popular on GitHub? prismor has more GitHub stars (343 vs 135). Stars measure visibility, not whether either tool fits your constraints. ### Are openfirma and prismor open source? Yes - both are open-source projects on GitHub (openfirma: GPL-3.0, prismor: Apache-2.0). ### Where can I find alternatives to openfirma or prismor? GraphCanon lists graph-backed alternatives at [openfirma alternatives](/tools/firma-ai-openfirma/alternatives) and [prismor alternatives](/tools/prismorsec-prismor/alternatives) ([openfirma markdown twin](/tools/firma-ai-openfirma/alternatives.md), [prismor markdown twin](/tools/prismorsec-prismor/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/firma-ai-openfirma-vs-prismorsec-prismor.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, openfirma or prismor? openfirma: Very active. prismor: Very active. 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 openfirma and prismor? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [openfirma trust report](/tools/firma-ai-openfirma/trust); [prismor trust report](/tools/prismorsec-prismor/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=firma-ai-openfirma`](/api/graphcanon/graph?tool=firma-ai-openfirma) - 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/_