Zoom [1], Cloudflare [2], and Datadog [3] had a fairly warm reception on HN and they're solid companies with high gross margins.

[1] https://news.ycombinator.com/item?id=19465860

[2] https://news.ycombinator.com/item?id=20706702

[3] https://news.ycombinator.com/item?id=20781610