Slack updates screen sharing feature to allow collaborative editing, marking up of docs, more and says Screenhero to be shuttered in December
Matthew Lynley / TechCrunch :
Context & Ripple Effects
Slack bought Screenhero in early 2015 to pull screen sharing and voice chat into its messaging platform, then waited two years before shipping native screen sharing in its Mac and Windows apps. This update completes the absorption: the built-in feature gains collaborative editing and document markup, and the standalone Screenhero app gets a December shutdown date.
The significance is directional: screen sharing stops being a passive 'look at my screen' tool and becomes a place where documents get edited together inside the chat client — consistent with Slack's broader push to keep work in-app rather than forcing switches to other software.
First-order effects
- Screenhero users have until December to migrate to Slack's native screen sharing, which now supports live editing and markup instead of view-only broadcasts.
- Slack's Mac and Windows apps become direct collaborators on documents during calls, changing screen sharing from presentation to joint work.
Second-order effects
- Power users who pushed back over Slack's WYSIWYG editor rewrite give the company little margin for error as editing moves directly into the chat interface.
- Retiring the acquired brand consolidates all screen-sharing usage and feedback into one native product loop, freeing Slack's roadmap from maintaining a separate app.
Third-order effects
- If the pattern holds, chat platforms absorb adjacent collaboration categories wholesale — the same arc later runs through Slack Huddles for audio and Canvas for in-channel documents.
- Acquired point solutions increasingly end up as features: buy, integrate, retire the brand — Screenhero's shutdown closes the loop opened by the 2015 deal.
The trend: Work-chat platforms are folding standalone collaboration tools into their own clients, turning messengers into shared work surfaces.