Slack raised $200M round at a valuation of $3.8B, now has 2.7M daily active users, of which 800K are paid
Slack just raised another $200 million round, and it's now worth $3.8 billion — Slack just confirmed that it's raised $200 million at a $3.8 billion valuation, confirming what Business Insider had previously reported.
Context & Ripple Effects
Business Insider's confirmation closes a loop on its own March sourcing of a Thrive Capital-led round: Slack has now banked $200M at a $3.8B valuation, with 2.7M daily active users of which 800K pay — roughly a third of daily usage converting to revenue-bearing accounts.
The round is an early marker in a steepening private-market climb for the company: within eighteen months Slack would raise again at $5.1B largely from SoftBank's Vision Fund (the September 2017 round), then a $427M Series H above $7.1B by August 2018.
First-order effects
- Slack exits the round with a $200M war chest and a disclosed conversion baseline — 800K paid users against 2.7M daily actives — that investors will now use as the yardstick for every subsequent raise.
Second-order effects
- The valuation jump from $3.8B toward $5.1B drew in SoftBank's Vision Fund, signaling that mega-funds were willing to write large checks into fast-growing enterprise SaaS before any exit event, compressing the interval between rounds.
Third-order effects
- If the pattern holds — repeated nine-figure raises at step-function valuations with no liquidity event — Slack becomes a case study in the widening gap between private marks and realizable value, where each new round validates the last one rather than testing it against public markets.
The trend: Enterprise collaboration software is being repriced through successive mega-rounds on private markets, with each raise setting the floor for the next.