Microsoft to end support for all third-party Cortana skills on September 7 and drop support for the dedicated Cortana apps on iOS and Android in early 2021
Microsoft is continuing to focus its Cortana digital assistant on productivity scenarios by phasing out Cortana Skills starting …
Context & Ripple Effects
This announcement sits mid-retreat in Microsoft's multi-year wind-down of Cortana as a consumer assistant. In late 2019 the company had already begun cutting country support for the mobile apps (eight countries including the UK lost support from January 31), and by the spring 2020 Windows 10 update it had pivoted Cortana to productivity features while stripping out music, connected-home, and other consumer skills.
Ending third-party skills and setting a date for the iOS and Android apps completes that pivot: skills were the consumer-ecosystem play modeled on Alexa, and without them Cortana survives only inside Microsoft's own productivity surfaces. The endpoint was already visible in later coverage — the mobile apps were formally discontinued in April 2021, and by 2023 Microsoft planned to remove Cortana from Windows entirely, positioning its newer AI efforts as the replacement.
First-order effects
- Third-party Cortana skill developers lose their entire distribution channel on September 7, and any user relying on skills-based content loses that functionality immediately.
- iOS and Android users are put on notice that the dedicated Cortana apps end in early 2021, forcing migration to Cortana's remaining touchpoints or rival assistants.
Second-order effects
- Skill developers who built for Cortana must port their work to Alexa or Google Assistant, concentrating the third-party voice ecosystem further around the two rivals who kept consumer programs open.
- With consumer surfaces gone, Cortana's remaining value collapses into Microsoft's own stack — email, calendar, Teams — making the assistant dependent on Microsoft 365 engagement rather than standalone usage.
Third-order effects
- The pattern points toward voice assistants surviving only where they are bundled into a broader software subscription or hardware lock-in, not as open third-party platforms — and ultimately toward Cortana's own replacement by Microsoft's newer AI assistant efforts, as the 2023 Windows removal plan makes explicit.
- For the industry, Microsoft's exit signals that assistant platforms without massive consumer install bases cannot sustain developer ecosystems, leaving a de facto two-player market for open voice skills.
The trend: Consumer voice assistants are retreating from open third-party ecosystems into productivity-bundled features, with Microsoft's Cortana dismantled stepwise ahead of replacement by newer AI assistants.