--- title: "ai-gateway vs julius" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/ferro-labs-ai-gateway-vs-praetorian-inc-julius" tools: ["ferro-labs-ai-gateway", "praetorian-inc-julius"] --- # ai-gateway vs julius *GraphCanon updated Sep 20, 2026* ## Verdict Pick ai-gateway if ai-gateway from Ferro Labs supports over 30 LLMs with integrated caching, guardrails, A/B testing, and cost controls, making it ideal for managing multiple language models in a production environment; pick julius if julius identifies over 60 AI services via IP:Port detection in seconds using Go. [ai-gateway](https://docs.ferrolabs.ai) reports 256 GitHub stars, 35 forks, and 68 open issues, last pushed Sep 10, 2026. [julius](https://www.praetorian.com/blog/introducing-julius-open-source-llm-service-fingerprinting/) has 233 stars, 31 forks, and 16 open issues, last pushed Sep 8, 2026. Figures are from public GitHub metadata via [ai-gateway's repository](https://github.com/ferro-labs/ai-gateway) and [julius's repository](https://github.com/praetorian-inc/julius). | | [ai-gateway](/tools/ferro-labs-ai-gateway.md) | [julius](/tools/praetorian-inc-julius.md) | | --- | --- | --- | | Tagline | Unified AI Gateway for multiple LLMs with caching, guardrails, A/B testing, and cost controls | LLM service identification tool | | Stars | 256 | 233 | | Forks | 35 | 31 | | Open issues | 68 | 16 | | Language | Go | Go | | Adopt for | ai-gateway from Ferro Labs supports over 30 LLMs with integrated caching, guardrails, A/B testing, and cost controls, making it ideal for managing multiple language models in a production environment. | Julius identifies over 60 AI services via IP:Port detection in seconds using Go. | | Persona | - | - | | Runtime | - | - | | License | Apache-2.0 - a permissive free software license | Apache-2.0 | | Categories | Inference & Serving, Model Training | AI Agents | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [ai-gateway](/tools/ferro-labs-ai-gateway.md) | [julius](/tools/praetorian-inc-julius.md) | | --- | --- | --- | | Days since push | 2d | 1d | | Open issues (now) | 68 | 16 | | Stars delta | +37 (30d) | +58 (30d) | | Open issues delta | +5 (30d) | 0 (30d) | | Full report | [trust report](/tools/ferro-labs-ai-gateway/trust.md) | [trust report](/tools/praetorian-inc-julius/trust.md) | ## Decision facts: ai-gateway - **Adopt for:** ai-gateway from Ferro Labs supports over 30 LLMs with integrated caching, guardrails, A/B testing, and cost controls, making it ideal for managing multiple language models in a production environment. - **License detail:** Apache-2.0 - a permissive free software license ## Decision facts: julius - **Adopt for:** Julius identifies over 60 AI services via IP:Port detection in seconds using Go. ## Choose when ### Choose ai-gateway if… - Tags unique to ai-gateway: ai-gateway, litellm, llm-cost, llm-proxy. - Also covers Inference & Serving, Model Training. - When you need to integrate more than 30 different LLM services including OpenAI and Anthropic ### Choose julius if… - Tags unique to julius: ai-security, attack-surface, capability, golang. - Also covers AI Agents. - Need quick identification of specific AI service types like Ollama, vLLM among others for security or reconnaissance. ## When NOT to use ai-gateway - If your project only involves one or two LLMs which does not necessitate the gateway's broad compatibility features - For small-scale projects that do not require comprehensive cost analysis tools - When custom integration for specific guardrails is required, as ai-gateway offers generalized settings ## When NOT to use julius - Requiring more detailed analysis beyond service detection, as Julius focuses solely on identification. - Seeking a tool under an open-source license other than Apache-2.0, given Julius's specific licensing terms. ## Common questions ### What is the difference between ai-gateway and julius? ai-gateway: Unified AI Gateway for multiple LLMs with caching, guardrails, A/B testing, and cost controls. julius: LLM service identification tool. See the comparison table for live GitHub stats and shared categories. ### When should I choose ai-gateway over julius? Choose ai-gateway over julius when Tags unique to ai-gateway: ai-gateway, litellm, llm-cost, llm-proxy; Also covers Inference & Serving, Model Training; When you need to integrate more than 30 different LLM services including OpenAI and Anthropic. ### When should I choose julius over ai-gateway? Choose julius over ai-gateway when Tags unique to julius: ai-security, attack-surface, capability, golang; Also covers AI Agents; Need quick identification of specific AI service types like Ollama, vLLM among others for security or reconnaissance. ### When should I avoid ai-gateway? If your project only involves one or two LLMs which does not necessitate the gateway's broad compatibility features For small-scale projects that do not require comprehensive cost analysis tools When custom integration for specific guardrails is required, as ai-gateway offers generalized settings ### When should I avoid julius? Requiring more detailed analysis beyond service detection, as Julius focuses solely on identification. Seeking a tool under an open-source license other than Apache-2.0, given Julius's specific licensing terms. ### Is ai-gateway or julius more popular on GitHub? ai-gateway has more GitHub stars (256 vs 233). Stars measure visibility, not whether either tool fits your constraints. ### Are ai-gateway and julius open source? Yes - both are open-source projects on GitHub (ai-gateway: Apache-2.0, julius: Apache-2.0). ### Where can I find alternatives to ai-gateway or julius? GraphCanon lists graph-backed alternatives at [ai-gateway alternatives](/tools/ferro-labs-ai-gateway/alternatives) and [julius alternatives](/tools/praetorian-inc-julius/alternatives) ([ai-gateway markdown twin](/tools/ferro-labs-ai-gateway/alternatives.md), [julius markdown twin](/tools/praetorian-inc-julius/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/ferro-labs-ai-gateway-vs-praetorian-inc-julius.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, ai-gateway or julius? ai-gateway: Very active. julius: 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 ai-gateway and julius? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [ai-gateway trust report](/tools/ferro-labs-ai-gateway/trust); [julius trust report](/tools/praetorian-inc-julius/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=ferro-labs-ai-gateway`](/api/graphcanon/graph?tool=ferro-labs-ai-gateway) - 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/_