Microsoft Teams vs. Slack: Teams is a part of Microsoft's vision to build an OS for the cloud whereas Slack is building an enterprise social network via Connect
On November 2, 2016, Microsoft announced Teams at a special event in New York City. Slack decided to mark the occasion: Tweets: @ldignan , @glennsolomon , @npshah , @mdudas , and @scottehartley Tweets: Larry Dignan / @ldignan : Latest from Ben on Slack vs. Teams. The Slack Social Network. Note key point about Microsoft's “superior ground game” and how basic blocking and tackling often underrated. Basic getting shit done always underrated. https://stratechery.com/... via @stratechery Glenn Solomon / @glennsolomon : As usualy, @benthompson dispassionately nails it: The Slack Social Network https://stratechery.com/... Neil / @npshah : Somewhere at Google a few PM are crying just a little bit. “[Google] has never learned how to listen to customers, how to sell, or how to build an ecosystem.” https://stratechery.com/... Mike Dudas / @mdudas : Teams is particularly effective as a way to prevent a Microsoft customer from even trying Slack. And, in that case, it doesn't matter how much “love” Slack put into its product: said love was not simply unrequited, but unexperienced. https://stratechery.com/... https://twitter.com/... Scott Hartley / @scottehartley : On one side of the universe is @Microsoft. On the other side of universe @googledocs @Dropbox @NotionHQ @airtable, @SlackHQ and the future. I'd rather bet on the future all day every day @stratechery https://stratechery.com/...
Context & Ripple Effects
This Stratechery piece reframes a rivalry that began with Slack's defensive posture at Teams' launch — the New York Times ad that made the upstart look rattled by Microsoft's arrival. Since then the two companies have taken opposite roads to the same buyer: Microsoft folded Teams into its Office bundle and later shipped a free tier capped at 10GB of storage to seed adoption, while Slack scaled upward through Enterprise Grid workspaces and now positions Connect as an enterprise social network rather than a bundled feature.
The framing matters because the scoreboard is split: Kruze Consulting found 60% of funded startups paid for Slack versus 12% for the Office bundle containing Teams, yet by 2023 analysts observed Salesforce's customers were not swayed by Slack and its revenue growth had cooled from 11.7% to 6.9%. Ben Thompson's 'superior ground game' argument says bundling and basic execution beat product affection over time.
First-order effects
- Microsoft's distribution advantage compounds immediately: every organization already paying for Microsoft 365 gets Teams at no marginal cost, forcing Slack to justify a separate line item against a free default.
- Slack's pivot to Connect as an enterprise social network repositions the product away from head-to-head feature competition it cannot win on price alone.
Second-order effects
- Under Salesforce ownership, Slack's standalone value proposition gets tested against its acquirer's customer base — and the declining growth rate suggests bundling inside Salesforce has not yet replicated Microsoft's ground game.
- Suite vendors gain pricing leverage across the whole office stack: once messaging is bundled, competitors must either build full suites or concede the collaboration layer and compete on specialized products.
Third-order effects
- If the pattern holds, enterprise software consolidates around cloud-OS platforms where chat is an attachment to infrastructure rather than a category — leaving room only for product-focused challengers attacking problems the suites underserve, the disruption thesis articulated later in coverage of Microsoft's vulnerabilities.
- The long-run contest becomes network effects versus lock-in: Connect's cross-company network is Slack's structural moat, but bundle-driven defaults have historically decided platform wars.
The trend: Enterprise collaboration is consolidating from standalone tools into bundled cloud-platform suites, with distribution and bundling beating product-led networks unless those networks span company boundaries.