Many for a while.
Almost none forever.
Yes, Atlassian has almost no “direct” sales team. But it has a very large channel that sells its product into the enterprise, and a lot of internal resources that support the channel. Those channel salespeople aren’t employees, so yes, leaning so heavily on the channel is unique. But it’s just third party selling instead of first party.
Yes, Slack started off with no “outside” sales team. Now, as it’s gone more and more enterprise, it’s staffed up with a deep and strong one.
Yes, Dropbox started off with no traditional sales team. Then to sell Dropbox Enterprise, it added several. And Box’s revenues are now 99% through the sales team, from 0–1% when it started as a pure freemium product.
You don’t need 100% sales-driven revenue to Go Big. Hybrid models can be great. Many of Twilio’s bigger customers go through sales, but then a huge amount of the downstream revenue is “automatic” as customers use more. Hence, Twilio has a very high level of sales efficiency (and relatively small headcount). But there’s still a real sales team there. They just only need to directly touch a subset of the total revenue.
It’s just hard to get past $100m ARR without going upmarket a bit, and closing larger deals. It’s the law of large numbers. And larger deals require a human touch. That can be done without sales. But if it’s only done with support and Happiness Officers … you close less revenue. More on the math here: Why You Need 50 Million Active Users for Freemium to Actually Work and why salespeople increase revenue here: Curse of the ‘Middlers’: Why Happiness Officers Can’t Stand In for True Sales Professionals
So convergent evolution says anyone trying to cross $100m in ARR or so will eventually add a true sales team. Maybe on Day 0. Maybe on Day 3650.