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 Userlook 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

Watch people talk honestly about your mobile app or website while they use itπ±π₯.
Visit Userlook| Signal | Chai | Userlook |
|---|---|---|
| Primary category | Testing | Testing |
| Directory rating | Not rated | Not rated |
| Recorded engagement | 165 | 106 |
| Listing tier | Standard | Standard |
| Current deal | None listed | None listed |
| Website | chaijs.com | userlook.co |
/ 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 Userlook if
Its stated focus is closer to your workflow: Watch people talk honestly about your mobile app or website while they use itπ±π₯.
Both products are listed in Testing. Chai is described as βChai is a BDD / TDD assertion library for [node](http://nodejs.org) and the browser that can be delightfully paired with any javascript testing framework.β while Userlook is described as βWatch people talk honestly about your mobile app or website while they use itπ±π₯.β.
Chai currently has more recorded engagement on EpicTools (165 versus 106).
EpicTools does not currently list an active deal for either Chai or Userlook.
Data note: this comparison uses current EpicTools directory records. Product capabilities and offers may change; confirm details on each vendor website before deciding.