About Replay
Replay is a time travel debugger that records and replays web applications using familiar browser dev tools. Trusted by engineering teams, Replay’s Nut API captures and analyzes app behavior to identify root causes of bugs, making bug-fixing more efficient and reliable.

Key Features
Key capabilities enabling rapid debugging and root-cause analysis include:
Deterministic Recorder
Chromium-based browser recorder captures exact, replayable app behavior for reliable analysis.
Time-Travel Debugger with DevTools
Replay sessions and state changes can be stepped through in browser dev tools to locate root causes.
Nut API Analytics
Analyzes recordings to surface causal relationships and actionable debugging insights.
Nut.new No-Code Builder
No-code tool to build apps from AI prompts and access Nut API for guidance.
Summary
For software engineers and QA teams, the primary value lies in reproducible, end-to-end recordings of web app runs that can be replayed with familiar dev tools to identify the root cause of bugs. The combination of a deterministic browser recorder, integrated analytics via the Nut API, and a no-code app-building path supports both deep investigation and rapid iteration within the debugging workflow.
Pricing
View pricingFree
$0 / month
- One project
- Limited customer support
- API connectors
- Download your code
- Deploy your applications
Builder
$20 / month
- Unlimited projects
- Priority Customer Support
- API connectors
- Download your code
- Deploy your applications