
Helicone AI
LangSmith
LangChain
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.

Rectangle
yabai
Boop
Alfred
BTT Remote
Contexts
Hookshot
Quick and streamlined execution of your scripts from a custom menu bar icon, or via keyboard shortcut.

Which is more popular?
Based on our record, Langfuse should be more popular than FastScripts. 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 | redsweater.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 FastScripts yet.
What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
Walkthroughs and reviews on video.
Langfuse in two minutes
FastScripts Delay
More videos
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Langfuse and FastScripts. 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 FastScripts 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 / 11 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 / 17 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 / 26 days ago
And as far as running that AppleScript, one option is https://redsweater.com/fastscripts/, and another is https://www.keysmith.app/ (disclaimer: I wrote that second one, Keysmith). Source: over 3 years ago
FastScripts[1] might be worth a look. I've been meaning to check it out myself though so I can't offer any personal experience with it. [1] https://redsweater.com/fastscripts/. - Source: Hacker News / over 3 years ago
Pressing . Will mark a photo as Favorite (or unmark it if already a Favorite). I also use the following AppleScript (open Script Editor, paste the code, then save the script as "Flag Photo.applescript") to add the keyword "flagged" to... Source: over 4 years ago
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A scriptable scratchpad for developers. Free & open source!
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