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

Mixpanel
Plausible.io
Amplitude
Google Analytics
Hotjar
Fathom Analytics
Microsoft Clarity
An open source suite of product and data tools including product analytics, feature flags, session replay, A/B testing, surveys, and more.

Which is more popular?
Based on our record, PostHog should be more popular than Langfuse. It has been mentioned 76 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | langfuse.com | posthog.com |
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| Company | Startup from the United States | Startup from the United States · 20 - 49 employees · 2020 |
| Listed in |
In their own words, as submitted to SaaSHub.


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....
For developers just starting out, PostHog is a free way to understand how your product is being used, without having to send any data to 3rd parties. For enterprise customers, one data security becomes a key concern, or B2C businesses where using a SaaS solution is unaffordable, it's typical to...
What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


No analysis of Langfuse yet.
Overall verdict
Why this product is good
Recommended for
PostHog is particularly well-suited for product teams, developers, and startups that require deep insights into user interactions and need the flexibility of a self-hosted solution. It is also a good fit for organizations that prioritize data privacy and want to maintain full control over their data.
Walkthroughs and reviews on video.
Langfuse in two minutes
PostHog Walk Through
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How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Langfuse and PostHog. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Ten free AI prompt tools in 2026 across four categories: prompt generators (SurePrompts, Anthropic Console, OpenAI Playground), libraries (AIPRM, PromptHero, FlowGPT, Awesome ChatGPT Prompts), open-source workflow...
According to BuiltWith, as of February 2024, PostHog is used on 5,169 (0.52%) of the top 1 million websites. Hotjar is used by 72,048 of the top 1 million websites. Typical PostHog users are engineers and product...
BlogBackSign inBlogThe 8 best free and open-source feature flag servicesPosted byThe best open-source feature flag tools1. PostHogWhat is PostHog?Supported librariesHow much does it cost?2. UnleashWhat is...
Recommendations tracked on public social media and blogs since March 2021.


Langfuse is an open-source LLM engineering platform specialized for AI applications. It provides:. - Source: dev.to / 12 days ago
Langfuse is an open-source observability and analytics platform for LLM applications. Its open-source nature is a significant draw for companies that prefer to self-host or want to avoid vendor lock-in. - Source: dev.to / 18 days ago
We have researched and experimented with several AI evaluation platforms, including Arize Phoenix, Microsoft Foundry, and Langfuse. After evaluating them against our requirements and roadmap, we shortlisted Microsoft Foundry and Langfuse... - Source: dev.to / 27 days ago
Start-here: Will Google show the URL → Search Console (free). Who visited → GA4 (free standard). Product/errors → PostHog or Sentry. Is it up → UptimeRobot or Better Stack. - Source: dev.to / 6 days ago
Run eas integrations:posthog:connect and EAS CLI creates or links your PostHog project, installs the SDK and config plugin, and writes environment variables to your project and EAS. Every event PostHog captures now carries eas/update_id,... - Source: dev.to / about 1 month ago
That setup is now one command. It creates your PostHog org and project, installs the SDK, adds the config plugin, and writes your keys into .env.local and your EAS environment variables for Production, Preview, and Development. You pick... - Source: dev.to / about 1 month ago
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