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Chai is a BDD / TDD assertion library for node and the browser that can be delightfully paired with any javascript testing framework.

Which is more popular?
Based on our record, Chai seems to be more popular. It has been mentioned 4 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | chaijs.com | feeedback.dev |
| Company | — | Startup from France · 2024 |
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In their own words, as submitted to SaaSHub.


No description of Chai yet.
Decode customer Feeedback and build what matters ! Understanding your customers is the key to growth, but collecting and analyzing feedback can be overwhelming. Feeedback is your AI-powered solution to gather real-time user reviews, track churn, and uncover actionable insights to shape the future...
What each product offers, as listed by its team.


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Overall verdict
Why this product is good
Recommended for
Developers working with JavaScript or Node.js who require a versatile and easy-to-use assertion library. It's particularly beneficial for those utilizing frameworks like Mocha or Jasmine and those who appreciate a choice between BDD and TDD styles in their testing approach.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
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Recommendations tracked on public social media and blogs since March 2021.


Mocha as the test runner, Chai as the assertion library, and the Hardhat Chai Matchers to extend Chai with contracts-related functionality. - Source: dev.to / about 4 years ago
Assertion library we used: Chai (comes with a lot of plugins worth exploring). - Source: dev.to / over 4 years ago
While this is fine and I could have perfectly moved all my tests to use said assertion style, I like the descriptive way Jest tests look like. As a quick way to maintain certain similarity I reached for ChaiJS, an assertion library that... - Source: dev.to / over 4 years ago
Tracking Feeedback.dev since Feb 2025.
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Engage in open-ended conversations and collaborations with AI-based characters and create your own characters for yourself and others to enjoy. Character.ai is a social platform for creating and interacting with advanced AI chatbots.
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Online survey software that allows anyone to create engaging surveys that display perfectly on smartphones, tablets, and browsers. View your results in real-time. Who said online surveys can’t be fun?
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Standalone test spies, stubs and mocks for JavaScript.
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