VS Code
CodePen
GitHub
Node.js
RegExr
JSFiddle
CodeSandbox
Free ebook for the JS Beginners

Braintrust
Poe
nexos.ai
Humanloop
ChatGPT
Portkey
Claude AI
The low-code platform for testing AI apps
Which is more popular?
Based on our record, Eloquent JavaScript seems to be a lot more popular than Langtail. While we know about 218 links to Eloquent JavaScript, we've tracked only 2 mentions of Langtail.
Website, pricing, platforms and company facts side by side.
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EJS
Eloquent JavaScript
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|---|---|---|
| Website | eloquentjavascript.net | langtail.com |
| Pricing | ||
| Company | — | Startup from the Czech Republic · 1 - 9 employees · 2024 |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of Eloquent JavaScript yet.
Langtail is a comprehensive low-code platform designed for testing and debugging AI applications powered by Large Language Models (LLMs). Our solution enables teams to build more predictable and secure AI-powered applications while reducing development time and catching potential issues before...
What each product offers, as listed by its team.

Possible disadvantages
An editorial look at what each product does well and who it suits.

Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Eloquent JavaScript A Modern Introduction to Programming 3rd Edition by Marijn Haverbeke review
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How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using Eloquent JavaScript and Langtail. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

If you haven’t read Eloquent JavaScript , go check it out. It’s one of my all-time favourite programming books — hands down. - Source: dev.to / about 1 year ago
Videos, blogs, text-based teachings, YouTube project-based learning, books, and the like are all examples of various methods and mediums of acquiring skills, especially in the software engineering industry. As I continue to navigate... - Source: dev.to / almost 2 years ago
Seconded. I won't recommend it and no one I know has recommended it for a decade. It's hard for someone who doesn't know JS to know which parts has changed and is no longer the way to do things. https://github.com/getify/You-Dont-Know-JS... - Source: Hacker News / about 2 years ago
Use specialized tools like Langtail and Deepchecks for LLM debugging. - Source: dev.to / almost 2 years ago
Tools: Platforms like LangChain, Kern AI Refinery, and Langtail simplify testing, debugging, and optimizing prompts. - Source: dev.to / almost 2 years ago
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Originally founded as a project to simplify sharing code, GitHub has grown into an application used by over a million people to store over two million code repositories, making GitHub the largest code host in the world.
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nexos.ai is an all-in-one AI platform that helps drive secure organization-wide AI adoption. Leaders set policies & guardrails and oversee AI usage, while business teams build no-code AI Agents and use top models like ChatGPT, Claude, and Gemini.
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