I think "HyperDev" actually - just found it: https://www.joelonsoftware.com/2016/05/31/introducing-hyperd...
- HyperDev [ First public branding / early launch ]
- GoMix [ First major relaunch, now with Anil as CEO ]
- Glitch [ After acquiring the sweet glitch.com domain from the kind folks at Slack ]
Source: I helped work on it