ChromeWinner vs. Langfa.st
ChromeWinner
🏅 ChromeWinner is "ahrefs for extensions". Analyze the competition, learn from the best and promote your extension. Receive daily updates on how your extensions perform and what competitors do. Grow your user base organically in Chrome Web Store by learning from already successful extensions. Subscribe to daily email digest and receive detailed updates: 📈 SERP for Chrome Store: monitor search results in the Chrome Web Store 👤 daily user growth: know which extensions acquire users faster ⚠️ get alerts when there are new players in the market (new competitors) ✍️ new reviews and rating changes - use competitors' feedback for your own profit ✨ get notified when competitors release new versions
Langfa.st
Langfa.st is a fast and minimal playground for testing and refining AI prompts. It supports over 50 large language models, including OpenAI, Anthropic, Mistral, Cohere, Google, and others — all available instantly without setup. You can insert variables, use Jinja2 templating, and compare outputs across models. There’s no need to sign up or bring your own API keys — it works out of the box. Langfa.st was built to eliminate the friction of existing tools: complicated UIs, required credentials, or overpriced subscriptions. It gives AI teams and prompt engineers a clean, disposable space to experiment, debug, and iterate — all in one tab. Free to use. You only pay if you need more volume or power features.
Reviews
Reviews
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Works without login or API key | 1 | |
Supports 50+ models out of the box | 1 | |
Built-in support for variables and Jinja2 templating | 1 | |
Instant response, no setup required | 1 | |
Clean and distraction-free UI | 1 |
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No custom API key support (yet) | 1 | |
Not ideal for running complex multi-turn chats | 1 |
Frequently Asked Questions
ChromeWinner is designed for analyzing and promoting Chrome extensions, providing insights into user growth and competitor performance. In contrast, Langfa.st focuses on testing and refining AI prompts across multiple language models without the need for login or API keys. If your goal is to analyze AI prompts specifically, Langfa.st would be more suitable, while ChromeWinner is better for extension market analysis.
Langfa.st is designed with a clean and distraction-free UI, allowing users to test AI prompts instantly without any setup or login requirements. ChromeWinner, while useful for extension analysis, may involve more complexity due to its focus on competitive insights and performance tracking. Therefore, Langfa.st is generally considered more user-friendly for quick testing and experimentation.
Yes, ChromeWinner provides features specifically tailored for Chrome extension developers, such as monitoring search results in the Chrome Web Store, tracking daily user growth, and receiving alerts about new competitors. Langfa.st, on the other hand, is focused on AI prompt testing and does not offer these competitive analysis features, making ChromeWinner more suitable for extension promotion.
Langfa.st is not ideal for running complex multi-turn chats, as it is primarily designed for quick testing of AI prompts. ChromeWinner does not focus on chat functionalities either, as it is aimed at analyzing Chrome extensions. Therefore, neither tool is particularly suited for complex multi-turn chat scenarios.
ChromeWinner is a tool designed for analyzing Chrome extensions, similar to how Ahrefs is used for website analysis. It helps users analyze the competition, learn from successful extensions, and promote their own extensions. It provides daily updates on extension performance, monitors search results in the Chrome Web Store, tracks daily user growth, alerts users about new market competitors, and notifies about reviews, rating changes, and new version releases.
ChromeWinner offers several features, including monitoring SERP for the Chrome Web Store, tracking daily user growth, providing alerts for new competitors, updating on new reviews and rating changes, and notifying users about new version releases of competitor extensions. These features are designed to help grow a user base organically in the Chrome Web Store by learning from successful extensions.
Langfa.st is a fast and minimal playground for testing and refining AI prompts. It supports over 50 large language models, including OpenAI, Anthropic, Mistral, Cohere, Google, and others — all available instantly without setup. Users can insert variables, use Jinja2 templating, and compare outputs across models without needing to sign up or provide API keys.
Pros of Langfa.st include: it works without login or API key, supports over 50 models out of the box, has built-in support for variables and Jinja2 templating, provides instant responses with no setup required, and features a clean and distraction-free user interface.
Cons of Langfa.st include the lack of custom API key support at this time and it may not be ideal for running complex multi-turn chats.
Langfa.st is particularly beneficial for AI teams and prompt engineers who need a clean, disposable space to experiment, debug, and iterate on AI prompts without the friction of complicated UIs or required credentials.
Yes, Langfa.st is free to use. Users only pay if they need more volume or access to power features.