Replay.io: Time-Travel Browser Debugging
Replay.io helps software companies and engineering teams diagnose browser-based bugs. It is designed for teams using AI coding agents that require runtime context to propose code fixes.
At a glance
- Category
- Software Development
- Best for
- Software engineering teams, Developers using AI coding agents, QA engineers, Front-end developers
- Pricing
- Pricing was not clearly available from the provided evidence. The vendor offers a freemium model with free access to start, alongside Starter, Professional, and Enterprise plans. Buyers should confirm current pricing on the vendor website.
- Key use cases
- Fixing Flaky CI Tests, Reproducing User-Reported Bugs, Unblocking AI Coding Agents
- Integrations
- Claude Code, Cursor, Copilot, Windsurf, Playwright
- Official website
- www.replay.io
Replay.io is a debugging tool that captures deterministic recordings of browser sessions, including DOM changes, network requests, and state updates. This allows developers to replay a bug as it occurred rather than attempting to manually reproduce it using logs or screenshots.
The tool supports software engineers and teams using AI coding agents such as Cursor, Claude Code, and Copilot. It is designed to provide these agents with runtime visibility, which may help prevent agents from repeating unsuccessful attempts when patching code.
Buyers can access the tool via a Chrome extension or through the Model Context Protocol (MCP) for IDE integration. It also supports integration with testing frameworks to help diagnose issues in continuous integration pipelines.
Buyers should confirm if their specific AI agents support MCP and verify session volumes in the tiered plans to ensure they align with their team's debugging frequency.
Key Features
Captures DOM changes, network requests, and state updates during a browser session.
Analyzes recordings to identify the state change or failed request that caused a bug.
Connects the recording engine to coding agents to provide runtime context and specific code fixes.
Allows users to record bugs in the browser and receive a plain-English fix to use with AI tools.
Supports integration with Playwright, Cypress, and Selenium to record test runs.
Use Cases
Recording continuous integration runs to help identify the root cause of intermittent test failures.
Using captured user sessions to analyze failure conditions that cannot be reproduced locally.
Providing runtime context to AI agents that may be stuck in loops when attempting to fix a bug.
Best For
Integrations
Pricing
Pricing was not clearly available from the provided evidence. The vendor offers a freemium model with free access to start, alongside Starter, Professional, and Enterprise plans. Buyers should confirm current pricing on the vendor website.
FAQ
Replay MCP is a Model Context Protocol server that connects the recording and analysis engine to coding agents, providing the runtime context needed to implement fixes.
It connects to agents that support MCP, including Cursor, Claude Code, Copilot, and Windsurf.
Yes, the tool is free to get started, and the evidence states no credit card is required for the initial setup.
Source category: Software Development
Source subcategory: Application Performance Monitoring
