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

Dialogflow
Intercom
Quidget AI
ChatBot
Landbot
Tidio
ManyChat
Build AI agents that train on your content, automate workflows, integrate with tools like Stripe & Calendly, and deploy instantly to boost leads, sales, and 24/7 customer support.

Which is more popular?
Based on our record, Langfuse seems to be more popular. It has been mentioned 35 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | langfuse.com | widgetstack.ai |
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| Company | Startup from the United States | β |
| 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....
WidgetStack is a no-code platform that lets businesses create and deploy AI agents (chatbots) trained on their own content, automate workflows, and integrate with business toolsβall in minutes. βΈ» π Core Functions 1. AI Agent Creation β’ Build intelligent chatbots/agents without coding. β’ Train...
What each product offers, as listed by its team.


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
Walkthroughs and reviews on video.
Langfuse in two minutes
Widgetstack Demo
How often each product is chosen within a category, 0β100% relative to the other.


Share your experience with using Langfuse and WidgetStack.ai. 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 WidgetStack.ai yet. Be the first one to post
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 / 13 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 / 19 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 / 28 days ago
Tracking WidgetStack.ai since Aug 2025.
When comparing Langfuse and WidgetStack.ai, you can also consider the following products.

Open-source LLM Observability for Developers
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Conversational UX Platform. (ex API.ai)
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Build and deploy LLM applications with confidence
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Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
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Framework for building applications with LLMs through composability
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Build AI agents that actually help β not just chat. Quidget handles support, sales, or internal questions 24/7, speaks 45+ languages, and hands off to your team when needed. Train it on your content β no code, live in 2 minutes.
Compare Quidget AI to Langfuse or WidgetStack.ai: