We evaluated many possible solutions for our in-app chat project, including building our own. Ultimately we went with Sendbird because they have a mature feature set, competetive pricing, and a solid stability track record. Working with them on our build process has been a joy and since launching about a month ago everything is working as expected. Bottomline is that they have delivered on what they promised, and that's all I want from my 3rd party solutions. Review collected by and hosted on G2.com.
So far it's been overwhelmingly positive, but if I had to point to something, their mobile UIkit could be better. It's serviceable, but eventually we plan to use their API and build our own UIkit. Review collected by and hosted on G2.com.
