I only chose teams to put on the website that really use it regularly. We have a bunch more logos of the type others here describe that I could have chosen but that's dumb.

Two teams at Slack currently use Grain.

Behzod runs research and has been tweeting about his use of Grain a decent amount lately: https://twitter.com/beh_zod/status/1250900606073442305 https://twitter.com/beh_zod/status/1248740029901332481

Here's Jason from Podium: https://twitter.com/jregb/status/1250995517724585985

Here's Dustin from Lambda School (not one of the logos): https://twitter.com/dustint314/status/1250948975202426880

But the actual answer to your question of how is that it took a long time to build something they wanted to use. We've been building a version of Grain for about 15 months now, about 6 months on the product we just released and 9 months on a version we threw away.

Eventually we built up word or mouth of happy users that refer other teams. It's a grind to get real teams to adopt anything but it is possible with continued effort.