--- title: "PROMPTPurify vs gateway" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/securelayer7-promptpurify-vs-trylonai-gateway" tools: ["securelayer7-promptpurify", "trylonai-gateway"] --- # PROMPTPurify vs gateway *GraphCanon updated Sep 20, 2026* ## Verdict Pick PROMPTPurify if pROMPTPurify, licensed under MIT, provides an ai-safety solution with a focus on jailbreak-detection and prompt-injection-protection for LLM applications without relying on regex or signatures; pick gateway if self-hosted firewall for securing AI applications with guardrails and content moderation. [PROMPTPurify](https://anton.securelayer7.net) reports 79 GitHub stars, 20 forks, and 0 open issues, last pushed May 31, 2026. [gateway](https://www.trylon.ai) has 131 stars, 12 forks, and 0 open issues, last pushed Jun 25, 2025. Figures are from public GitHub metadata via [PROMPTPurify's repository](https://github.com/securelayer7/PROMPTPurify) and [gateway's repository](https://github.com/trylonai/gateway). | | [PROMPTPurify](/tools/securelayer7-promptpurify.md) | [gateway](/tools/trylonai-gateway.md) | | --- | --- | --- | | Tagline | Prompt-injection guardrail for LLM applications | Self-hosted firewall for securing AI applications with guardrails and content moderation. | | Stars | 79 | 131 | | Forks | 20 | 12 | | Open issues | 0 | 0 | | Language | TypeScript | Python | | Adopt for | PROMPTPurify, licensed under MIT, provides an ai-safety solution with a focus on jailbreak-detection and prompt-injection-protection for LLM applications without relying on regex or signatures. | Self-hosted firewall for securing AI applications with guardrails and content moderation. | | Persona | - | - | | Runtime | - | - | | License | MIT | Other | | Categories | Evaluation & Observability, LLM Frameworks | Evaluation & Observability, LLM Frameworks | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [PROMPTPurify](/tools/securelayer7-promptpurify.md) | [gateway](/tools/trylonai-gateway.md) | | --- | --- | --- | | Maintenance | Slowing (36%) | Dormant (18%) | | Days since push | 104d | 445d | | Full report | [trust report](/tools/securelayer7-promptpurify/trust.md) | [trust report](/tools/trylonai-gateway/trust.md) | ## Decision facts: PROMPTPurify - **Pricing:** freemium - The SDK and model weights of PROMPTPurify come under the MIT license, allowing free usage. However, the full extent of features or services might require a premium setup. - **Requirements:** - This tool is built with TypeScript.; - Ensure familiarity with TypeScript for efficient integration. - **Adopt for:** PROMPTPurify, licensed under MIT, provides an ai-safety solution with a focus on jailbreak-detection and prompt-injection-protection for LLM applications without relying on regex or signatures. ## Decision facts: gateway - **Pricing:** freemium - Open-source with no explicit monetary cost, but requires users to handle infrastructure costs associated with local Docker deployment - **Requirements:** Min 4 GB RAM; Requires Docker; Docker and Docker Compose are required for deployment; Initial launch takes several minutes due to downloading machine learning models (~1.5GB+) for the first time - **Adopt for:** Self-hosted firewall for securing AI applications with guardrails and content moderation. ## Choose when ### Choose PROMPTPurify if… - PROMPTPurify is primarily TypeScript; gateway is Python. - License: PROMPTPurify is MIT, gateway is Other. - Pricing: The SDK and model weights of PROMPTPurify come under the MIT license, allowing free usage. However, the full extent of features or services might require a premium setup.. - Requirements: - This tool is built with TypeScript.; - Ensure familiarity with TypeScript for efficient integration.. - Tags unique to PROMPTPurify: ai-firewall, ai-safety, ai-security, application-security. - - When you require compact model solutions that outperform larger open-source guards. ### Choose gateway if… - gateway is primarily Python; PROMPTPurify is TypeScript. - License: gateway is Other, PROMPTPurify is MIT. - Pricing: Open-source with no explicit monetary cost, but requires users to handle infrastructure costs associated with local Docker deployment. - Requirements: Min 4 GB RAM; Requires Docker; Docker and Docker Compose are required for deployment; Initial launch takes several minutes due to downloading machine learning models (~1.5GB+) for the first time. - Tags unique to gateway: content-moderation, docker-compose, pii-redaction, prompt-injection. - gateway ships Docker support for self-hosted deployment. - When you need to self-host a secure gateway for LLM-based AI applications that requires local deployment via Docker ## When NOT to use PROMPTPurify - - Avoid using PROMPTPurify if your project requires regex or signature-based methods for security purposes, as this tool does not support them. - - Do not use it if you are looking for comprehensive AI-security solutions that extend beyond prompt injection and jailbreak detection. ## When NOT to use gateway - Avoid if you are looking for cloud-managed services, as this tool is designed solely for local or self-hosted environments - Not suitable if you require extensive customization beyond the provided policies.yaml file and predefined guardrails for content moderation and security ## Common questions ### What is the difference between PROMPTPurify and gateway? PROMPTPurify: Prompt-injection guardrail for LLM applications. gateway: Self-hosted firewall for securing AI applications with guardrails and content moderation.. See the comparison table for live GitHub stats and shared categories. ### When should I choose PROMPTPurify over gateway? Choose PROMPTPurify over gateway when PROMPTPurify is primarily TypeScript; gateway is Python; License: PROMPTPurify is MIT, gateway is Other; Pricing: The SDK and model weights of PROMPTPurify come under the MIT license, allowing free usage. However, the full extent of features or services might require a premium setup.; Requirements: - This tool is built with TypeScript.; - Ensure familiarity with TypeScript for efficient integration.; Tags unique to PROMPTPurify: ai-firewall, ai-safety, ai-security, application-security; - When you require compact model solutions that outperform larger open-source guards. ### When should I choose gateway over PROMPTPurify? Choose gateway over PROMPTPurify when gateway is primarily Python; PROMPTPurify is TypeScript; License: gateway is Other, PROMPTPurify is MIT; Pricing: Open-source with no explicit monetary cost, but requires users to handle infrastructure costs associated with local Docker deployment; Requirements: Min 4 GB RAM; Requires Docker; Docker and Docker Compose are required for deployment; Initial launch takes several minutes due to downloading machine learning models (~1.5GB+) for the first time; Tags unique to gateway: content-moderation, docker-compose, pii-redaction, prompt-injection; gateway ships Docker support for self-hosted deployment; When you need to self-host a secure gateway for LLM-based AI applications that requires local deployment via Docker. ### When should I avoid PROMPTPurify? - Avoid using PROMPTPurify if your project requires regex or signature-based methods for security purposes, as this tool does not support them. - Do not use it if you are looking for comprehensive AI-security solutions that extend beyond prompt injection and jailbreak detection. ### When should I avoid gateway? Avoid if you are looking for cloud-managed services, as this tool is designed solely for local or self-hosted environments Not suitable if you require extensive customization beyond the provided policies.yaml file and predefined guardrails for content moderation and security ### Is PROMPTPurify or gateway more popular on GitHub? gateway has more GitHub stars (131 vs 79). Stars measure visibility, not whether either tool fits your constraints. ### Are PROMPTPurify and gateway open source? Yes - both are open-source projects on GitHub (PROMPTPurify: MIT, gateway: Other). ### Where can I find alternatives to PROMPTPurify or gateway? GraphCanon lists graph-backed alternatives at [PROMPTPurify alternatives](/tools/securelayer7-promptpurify/alternatives) and [gateway alternatives](/tools/trylonai-gateway/alternatives) ([PROMPTPurify markdown twin](/tools/securelayer7-promptpurify/alternatives.md), [gateway markdown twin](/tools/trylonai-gateway/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/securelayer7-promptpurify-vs-trylonai-gateway.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, PROMPTPurify or gateway? PROMPTPurify: Slowing. gateway: Dormant. 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 PROMPTPurify and gateway? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [PROMPTPurify trust report](/tools/securelayer7-promptpurify/trust); [gateway trust report](/tools/trylonai-gateway/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=securelayer7-promptpurify`](/api/graphcanon/graph?tool=securelayer7-promptpurify) - 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/_