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Vercel•June 22, 2026
Vercel WebSocket
Free
WebSocket
Vercel Functions
Real-time applications
Public beta
### TL;DR
Vercel Functions now supports WebSocket connections, enabling bidirectional communication between clients and server-side code. This feature facilitates real-time applications like interactive AI streaming, chat, and collaborative apps. WebSocket connections utilize Fluid compute and adhere to the same limits and pricing as other Function invocations, with billing based on active CPU usage during message processing.
Key Insights & Metrics
Pricing
Available on all plans (including the free Hobby tier); billed based on active CPU usage during message processing
Cost structure
Version
Public Beta
Current release version
Hardware
No hardware requirements
Compute requirements
Category
Free
Licensing model
Region
United States
Primary region
Key Features
- Bidirectional communication between clients and server-side code
- Facilitates real-time applications like interactive AI streaming, chat, and collaborative apps
- Operates on Fluid compute with the same limits and pricing as other Function invocations
- Billing based on active CPU usage during message processing
- Supports standard Node.js libraries and higher-level libraries like Socket.IO
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