How many companies use Underscore.js vs YUI?

3,680 companies use Underscore.js and 93 companies use YUI in our database. Underscore.js is more widely adopted with 39.6x more companies than YUI.

Can I get a list of companies using both Underscore.js and YUI?

Yes. AgentData tracks companies using both tools. Sign up free to access the full list with emails, tech stacks, and contacts via CSV or API.

Underscore.js is used by 3,680companies — 39.6x more than YUI (93).

3,680 use Underscore.js93 use YUI

	Underscore.js	YUI
Companies	3,680	93
Category	JavaScript libraries	JavaScript libraries

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3,773 companies with emails, tech stacks, and contacts

1,000 lookups · API access · CSV exports

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GET /api/v1/tech?name=underscore-js

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