Real-Time Delivery
Zero-Latency Streaming
Reviewed by Shalabh Agarwal · OTT & StreamingLast updated: 2026-07-01
Zero-latency streaming aims for near-instant, sub-second delay between a live event and the viewer — the lowest-latency tier, typically achieved with WebRTC. It enables truly real-time use cases like betting, auctions, and interactive live.
Enveu take
'Zero latency' is really sub-second latency — WebRTC-class delivery for genuinely interactive live, traded against the scale and cost efficiency of HLS/DASH, so you use it only where real-time is the product.
LiveLatencyReal-time
Where it fits in the OTT stack
Encoder→WebRTC/Real-time Server→Edge→Player (tiny buffer)
How it works
- The stream is delivered over a real-time transport (WebRTC).
- Media flows with minimal buffering to the player.
- The player holds a tiny buffer to stay at the live edge.
- Delay drops to sub-second for real-time interaction.
Key components
- WebRTC or ultra-low-latency transport
- Minimal player buffering
- Real-time signaling infrastructure
- Scale/cost trade-offs vs HLS/DASH
Performance impact
- Sub-second glass-to-glass latency
- Enables real-time interactivity
- Higher cost/complexity than HLS/DASH at scale
Common issues
- Rebuffering risk with tiny buffers
- Scaling WebRTC to large audiences
- Fallback needed for unsupported clients
When to use it
- Betting, auctions, and gaming
- Interactive and two-way live
Signals to monitor
- Glass-to-glass latency
- Real-time session stability
- Concurrency at peak
Real-world example
Real-time interactive live
A betting product needed instant live.
Challenge
- Even low-latency HLS lagged bets
- Standard delivery wasn't real-time
Action taken
- Used WebRTC for sub-second delivery
- Kept an HLS fallback for scale and reach
Outcome
Live interaction became viable in real time where it mattered most.
Frequently asked questions
What is zero-latency streaming?
Zero-latency streaming aims for near-instant, sub-second delay between a live event and the viewer — the lowest-latency tier, typically achieved with WebRTC.
How is zero latency achieved?
Primarily with real-time transports like WebRTC and minimal player buffering, which cut glass-to-glass delay to sub-second for interactive use cases.
When do you need zero-latency streaming?
For truly real-time interaction — betting, auctions, gaming, and two-way live — where even a few seconds of delay breaks the experience. Otherwise low-latency HLS/DASH suffices.
Is truly zero latency possible?
No — encoding, network transit and decoding always add delay. 'Zero latency' in practice means sub-second, typically via WebRTC, which is low enough that conversation and interaction feel immediate.
When is sub-second latency actually required?
Interactive cases where delay breaks the experience: live betting and auctions, watch-parties, two-way Q&A and synchronized second-screen. For ordinary live sports or events, low-latency HLS/DASH at a few seconds is sufficient and far cheaper to run.
Build it with Enveu
Stream in real time
Enveu delivers low- and ultra-low-latency live with adaptive fallback for scale.