Microsoft Teams is replacing Skype for Business to put more pressure on Slack
Microsoft Teams isn't even a year old, but it's about to replace Skype for Business. At Microsoft's Ignite conference in Orlando, Florida today, the software giant is revealing that it plans to kill off Skype for Business in favor of Microsoft Teams.
Context & Ripple Effects
Microsoft built Teams explicitly as a Slack competitor from the start — launched in November 2016 bundled with Office 365 and wired into SharePoint and PowerBI — then made it a free, on-by-default feature for every Office 365 business user in March 2017. The Ignite announcement is the next step: instead of running Teams alongside its legacy enterprise messaging product, Microsoft is collapsing the two into one.
That matters because it converts Teams from an add-on into the default communications layer of the Office 365 suite, putting Slack up against a rival that ships pre-installed on millions of corporate seats.
First-order effects
- Skype for Business customers get a forced migration path to Teams, consolidating their messaging, video, and meetings on one Microsoft platform.
- Slack now competes against a product that reaches enterprises through Office 365 defaults rather than through separate procurement decisions.
Second-order effects
- With Teams included in Office 365 subscriptions, Slack's per-seat pricing becomes the visible cost of choosing a standalone tool, pressuring it to justify premium features like integrations and search that Microsoft bundles by default.
- Enterprise IT departments face fewer vendor choices for chat-plus-video, shifting leverage toward Microsoft in renewals and suite negotiations.
Third-order effects
- If the pattern holds, workplace communication consolidates into productivity suites, and the later arc confirms it: Microsoft went on to set a hard retirement date for Skype for Business Online and eventually shut down consumer Skype entirely, migrating users to Teams.
- Suite-default distribution becomes the decisive competitive weapon in collaboration software, disadvantaging point products that must be bought separately.
The trend: Workplace chat is consolidating into productivity-suite bundles, where default distribution inside Office 365 outweighs standalone product quality.