
Marvel
Invision
Figma
UXpin
Axure RP
Adobe XD
Moqups
Proto.io
Langfuse
Helicone AI
LangSmith
LangChain
Openlayer
Braintrust.dev
Portkey
LastMile AI
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. By integrating seamlessly into existing workflows, Langfuse streamlines the process of monitoring, debugging, and optimizing LLM applications. Our platform's robust documentation and active community support make it easy for developers to leverage Langfuse for enhancing their LLM projects efficiently. Whether you're troubleshooting interactions or iterating on new features, Langfuse is committed to simplifying your LLM development journey.
Marvel
LangfuseBased on our record, Langfuse should be more popular than Marvel. It has been mentiond 28 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Marvelapp.com โ Design, prototyping, and collaboration, free plan limited to one user and project. - Source: dev.to / over 2 years ago
At this stage your main goal should be to prototype it and test it with people to validate the idea. Or at the very least have something people can look at and respond to. Donโt worry about building a coded and working version yet. Start with a clickable prototype which can be built using design tools. Most people use Figma these days but if youโre just starting out you could use something like Marvel, which is... Source: over 3 years ago
Marvelapp.com โ Design, prototyping and collaboration, free plan limited to one user and one project. - Source: dev.to / over 3 years ago
Hi, I am doing research on some of the user testing tools out there like lookback.io, Marvelapp.com, maze.design, usabilityhub.com, userbrain.net, usertesting.com, userzoom.com. I would like to know about your experience. Source: almost 4 years ago
As far as I can remember, I saw https://marvelapp.com/ doing it to add a prototype to the homescreen. Source: about 4 years ago
In this project we will build a Python banking assistant agent using Strands Agents and make it observable and continuously evaluated using Langfuse โ step by step. - Source: dev.to / 16 days ago
Langfuse is the open-source standard for LLM observability. It traces every LLM interaction โ prompts, completions, latency, token usage, cost โ and provides the tooling to debug, evaluate, and optimize LLM applications in production. Think of it as "Datadog for LLM calls" with a focus on prompt engineering workflows. - Source: dev.to / about 1 month ago
You're monitoring production traffic. You need Langfuse / Phoenix / Helicone / Braintrust for that. Online eval is a different problem class: implicit feedback, drift detection, hallucination rates on your data, not on HellaSwag. - Source: dev.to / about 2 months ago
Gateway or proxy attribution. A reverse proxy in front of the model-provider API records the request, computes the cost, and exposes per-customer breakdowns. Open-source options include Helicone, LiteLLM, Langfuse, and OpenLLMetry. Hosted equivalents serve as the AI cost observability layer for teams that want centralized visibility: LangSmith, Datadog LLM Observability, Arize Phoenix. Adds a network hop.... - Source: dev.to / about 2 months ago
Same approach works with Langfuse, Phoenix, Braintrust, or your existing OTel pipeline โ the metadata.userId pattern is the universal part. - Source: dev.to / about 2 months ago
Invision - Prototyping and collaboration for design teams
Helicone AI - Open-source LLM Observability for Developers
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
LangSmith - Build and deploy LLM applications with confidence
UXpin - Design is really about solving problems. UXPin is the UX Design Platform that gets that right.
LangChain - Framework for building applications with LLMs through composability