Zenity
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Cytrusst GRC
Sentinel SCA
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VerifyWise.ai
Runtime security and governance for AI agents. Block threats, enforce policies, require human approval, control spending, and generate one-click SOC 2/GDPR/OWASP compliance reports. Free forever for one agent.

Helicone AI
LangSmith
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PromptLayer
Portkey
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Openlayer
Langfuse is an open-source LLM engineering platform that helps teams collaboratively debug, analyze, and iterate on their LLM applications.

Which is more popular?
Based on our record, Langfuse seems to be more popular. It has been mentioned 32 times since March 2021.
Website, pricing, platforms and company facts side by side.
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Polaxis
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| Website | polaxis.io | langfuse.com |
| Pricing | — | |
| Company | — | Startup from the United States |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of Polaxis yet.
Langfuse is an open-source LLM engineering platform designed to empower developers by providing insights into user interactions with their LLM applications. We offer tools that help developers understand usage patterns, diagnose issues, and improve application performance based on real user data....
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No analysis of Langfuse yet.
Walkthroughs and reviews on video.
Polaxis Speech Synthesizer Eurorack Modules | Superbooth 2018 (english)
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Langfuse in two minutes
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Recommendations tracked on public social media and blogs since March 2021.

Tracking Polaxis since May 2026.
Langfuse is the other serious option in this category if you also want observability, evals and traces bundled with prompt management. Different scope, more setup, worth comparing honestly. - Source: dev.to / 11 days ago
Langfuse with Microsoft.Extensions.AI has an appealing story: update prompts without redeploying. A prompt fetches its config blob—model, tokens, temperature—which the code passes straight to the LLM. - Source: dev.to / 14 days ago
Langfuse is not a replacement for OpenTelemetry; it is a specialization layer built on top of it. Langfuse was engineered specifically for the unique telemetry needs of LLM applications. It acts as the semantic layer that OTel lacks. - Source: dev.to / 19 days ago
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Build and deploy LLM applications with confidence
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