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

CodeTray.dev
DevsBox
DevToolKit.site
FreeToolkit
WebToolKit.tech
Webtools.takendrabam.com.np
29 free browser-based developer tools — JWT, regex, cron, timestamp converters, CSS generators, security checkers, and content generators. No sign-up required.
Which is more popular?
Based on our record, Langfuse seems to be a lot more popular than SamToolkit. While we know about 36 links to Langfuse, we've tracked only 1 mention of SamToolkit.
Website, pricing, platforms and company facts side by side.
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| Website | langfuse.com | samtoolkit.com |
| Pricing | ||
| Platforms | — | |
| Company | Startup from the United States | 2026 |
| 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....
SamToolkit is a free collection of 29 small, focused developer utilities across 7 categories — converters, debuggers, generators and reference tools. Everything runs client-side in your browser, so nothing you paste or type is ever sent to a server. There is no account, no sign-up and no paywall,...
What each product offers, as listed by its team.


Possible disadvantages
Walkthroughs and reviews on video.
Langfuse in two minutes
No SamToolkit 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 SamToolkit. 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 SamToolkit yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Your agent gave a wrong answer, and every span in the trace is green. Both TraceRoot and Langfuse will show you that trace. This post compares what each one does next, from tracing and detection to a root cause and a fix. - Source: dev.to / 13 days ago
Langfuse is an open-source LLM engineering platform specialized for AI applications. It provides:. - Source: dev.to / about 1 month 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 / about 2 months ago
So I built my own PDF Merge and PDF Split tools on SamToolkit. They're free for 10 pages a day, and if you need more, you can buy a $5 weekly pass: a one-time payment that never renews automatically, so there's no subscription to forget... - Source: dev.to / 18 days ago
When comparing Langfuse and SamToolkit, you can also consider the following products.

Open-source LLM Observability for Developers
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Fast, free developer tools. JSON formatter, Base64, JWT, Regex and more. Runs 100% in your browser.
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Build and deploy LLM applications with confidence
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Developer tools: JSON/JWT/base64, hash, regex tester, UUID, cron, timestamp, color.
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Framework for building applications with LLMs through composability
Compare LangChain to Langfuse or SamToolkit:

19 free browser-based developer tools — no signup, no tracking, everything runs client-side.
Compare DevToolKit.site to Langfuse or SamToolkit: