While we're at it, a bunch of YC companies are headquartered or have an office there like Appcanary, Upverter, PagerDuty. Big tech companies have offices there

While we're at it, a bunch of YC companies are headquartered or have an office there like Appcanary, Upverter, PagerDuty. Big tech companies have offices there too, like Mozilla and Google (mostly sales in Toronto for now, eng in Waterloo). Lots of small bootstrapped tech startups, consultancies, and agencies, too—like the famous Teehan+Lax agency that got bought by Facebook. This is just from the top of my head, I'd love to see a more comprehensive list.