Slack raised $120M at $1.12B valuation in a round led by Kleiner and Google Ventures, all previous backers participated too
Slack's One-Year-Old Software Business Valued at $1.12 Billion — Workplace collaboration tool Slack didn't exist two years ago.
Context & Ripple Effects
Six months after a $43 million round at a $250 million valuation (April's raise), Slack has quadrupled-plus its private mark to $1.12 billion on $120 million more — with every earlier backer re-upping rather than taking an exit. Kleiner Perkins and Google Ventures led as new leads, and the pickup was unusually wide: Fortune, NYT, TechCrunch, The Verge and others all chased it, with Fortune landing a Butterfield Q&A on the valuation itself.
The round lands weeks after Slack made its first acquisition — the two-person document-editing startup Spaces — in a move framed at the time as preparation to compete directly with Google and Microsoft. Taking money from Google Ventures while positioning against Google gives that rivalry an extra layer.
First-order effects
- Slack now holds roughly $163 million raised inside 2014 alone, capital sized for head-on product competition with Microsoft and Google rather than niche growth.
- Kleiner Perkins and Google Ventures convert from observers to lead investors with all previous backers participating, signaling insider conviction rather than a rescue round.
Second-order effects
- Microsoft and Google face a well-capitalized challenger whose acquisition pace (Spaces) suggests platform ambitions beyond chat, forcing product responses in their own collaboration lines.
- Rival enterprise-software startups now compete against a company whose valuation benchmark moved from $250 million to $1.12 billion in six months, raising the fundraising bar for anyone selling into workplace communication.
Third-order effects
- If the step-up cadence holds — the corpus shows subsequent rounds at $2.8B, $3.8B, $5.1B and over $7.1B — Slack becomes a template for how fast a SaaS company can compound private marks before any liquidity event.
- The pattern points toward workplace software consolidating around heavily capitalized platforms, where distribution and integration acquisitions like Spaces matter more than point tools.
The trend: Enterprise collaboration is entering a venture-funded land-grab phase in which private valuations compound in months, not years, ahead of any public-market reckoning.