How Resend transformed email collaboration with real-time multiplayer editing

Challenge

Email creation has long been a solitary process, with team members working in isolation and struggling to collaborate. Resend recognized that email marketing is fundamentally a team effort, but existing tools failed to provide a truly collaborative experience. To break down these barriers, the Resend team developed a multiplayer editor that would:

• Enable real-time collaboration
• Provide instant visual feedback
• Eliminate version conflicts
• Improve team productivity and creativity

Solution

Resend partnered with Liveblocks to create a revolutionary multiplayer email editor that transforms how teams create and refine email broadcasts.

“Email is not a single-player game. We wanted to create an editor that feels like a live, collaborative workspace where teams can work together seamlessly.”

Zeno RochaFounder and CEO at Resend

The team implemented these key collaborative features powered by Liveblocks:

Presence indicators

Team members can see who is currently viewing and editing an email in real time, providing instant visibility into team activities and eliminating collaboration guesswork.

Live cursors

Real-time cursor tracking shows exactly where colleagues are working in the editor, creating an intuitive, connected experience that helps teams coordinate edits and provide instant feedback.

Collaborative styling

Every design change is instantly visible to all team members—from font sizes and background colors to custom CSS updates.

Real-time field updates

Beyond content and design, all editor fields update simultaneously.

More information

You can find a more detailed video of each feature on Resend’s X account.

Results

The multiplayer editor transforms email creation from a fragmented process into a collaborative, intuitive experience. Through real-time interaction, Resend eliminates traditional barriers between team members, enabling seamless collaboration, instant feedback, and more cohesive email design.

If you’d like to build something similar, you can explore our text editors and live cursors open-source examples.