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

Buildrs
CodeImage
Moodle
Codementor
Canvas by Instructure
Chamilo
Twitch
The home of developers to code & learn faster

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.
|
|
|
|
|---|---|---|
| Website | langfuse.com | stack-stream.com |
| Pricing | — | |
| Company | Startup from the United States | — |
| 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....
No description of stackstream yet.
What each product offers, as listed by its team.


Possible disadvantages
No features have been listed yet.
Walkthroughs and reviews on video.
Langfuse in two minutes
No stackstream videos yet. You could help us improve this page by suggesting one.
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Langfuse and stackstream. 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...
We have no reviews of stackstream yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


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 / 17 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 / 20 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 / 25 days ago
Tracking stackstream since Apr 2023.
When comparing Langfuse and stackstream, you can also consider the following products.

Open-source LLM Observability for Developers
Compare Helicone AI to Langfuse or stackstream:


Build and deploy LLM applications with confidence
Compare LangSmith to Langfuse or stackstream:

A tool for manage and beautify your code screenshots
Compare CodeImage to Langfuse or stackstream:

Framework for building applications with LLMs through composability
Compare LangChain to Langfuse or stackstream:

Moodle is the world's most popular learning management system. Start creating your online learning site in minutes!
Compare Moodle to Langfuse or stackstream: