Chai
OPEN SOURCE
Assertion library for Node.js and browsers
About
Chai is an assertion library for Node.js and browsers that provides a simple and expressive way to write tests. It offers various assertion styles and plugins for different testing needs.
Pricing
Pricing Type
Open Source
Free tier available
Billing
One-time payment
Last checked: February 17, 2026
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Key Facts
Categories
Platforms
Web
Company
Chai
Founded
Founded in 2011
Country
Global
Language
English