[enraged_camel]

Well, there are many reasons to use React (the large ecosystem means you can find libraries and tutorials easily, for example) but yes, the license is a deal breaker for many, especially larger companies with legal teams who actually understand the ramifications.

[atoko]

It depends on how many software patents the company owns. In most cases it's 0

[seangrogg]

It could also matter if you're in violation of a patent held by Facebook or any of its subsidiaries.

[YCode]

Microsoft has no problem using React -- what are the ramifications?

[dfrsol]

Microsoft, Netflix, and Twitter most likely have agreements in place with Facebook regarding the use license.

Source: I worked for a large company that had banned the use of React for all external facing projects, recently Facebook and their lawyers came to an agreement and now it's widely used.

[travmatt]

Doesn't Netflix as well?

[altotrees]

Yep, and Palantir also. I wish my company would be more open to using it, but the patent issue makes it a non-starter for us.

[xiaoma]

If you're MS, there are no ramifications.