01 / Product A
Chai is a BDD / TDD assertion library for [node](http://nodejs.org) and the browser that can be delightfully paired with any javascript testing framework.
Visit Chai[ PRODUCT_COMPARISON / SIDE_BY_SIDE ]
> Chai and Percy are both Testing options. Compare their stated focus, directory signals, and current offers before opening each product for a hands-on evaluation.
01 / Product A
Chai is a BDD / TDD assertion library for [node](http://nodejs.org) and the browser that can be delightfully paired with any javascript testing framework.
Visit Chai02 / Product B

The new way to design, develop, and deliver software with confidence.
Visit Percy| Signal | Chai | Percy |
|---|---|---|
| Primary category | Testing | Testing |
| Directory rating | Not rated | Not rated |
| Recorded engagement | 165 | 176 |
| Listing tier | Standard | Standard |
| Current deal | None listed | None listed |
| Website | chaijs.com | percy.io |
/ Choose Chai if
Its stated focus matches what you need: Chai is a BDD / TDD assertion library for [node](http://nodejs.org) and the browser that can be delightfully paired with any javascript testing framework.
/ Choose Percy if
Its stated focus is closer to your workflow: The new way to design, develop, and deliver software with confidence.
Both products are listed in Testing. Chai is described as “Chai is a BDD / TDD assertion library for [node](http://nodejs.org) and the browser that can be delightfully paired with any javascript testing framework.” while Percy is described as “The new way to design, develop, and deliver software with confidence.”.
Percy currently has more recorded engagement on EpicTools (176 versus 165).
EpicTools does not currently list an active deal for either Chai or Percy.
Data note: this comparison uses current EpicTools directory records. Product capabilities and offers may change; confirm details on each vendor website before deciding.