Multiplayer is now open source
The Multiplayer debugging agent is open source under MIT. Here's why, and what it means for how you use it.
Latest
The death of the dashboard: why agentic AI is choking on legacy observability tools
Dashboards, sampling, and data lakes were built for human debugging. Closing the bug-to-fix loop for AI agents requires rethinking how runtime data is collected and correlated.
The debugging agent for developers: runs locally and eliminates PR slop
The Multiplayer debugging agent is purpose-built for developers working with coding agents. It captures all the data observability tools miss and manages the whole process from bug identified to bug fixed.
The (not so) hidden cost of custom logging
Custom logging can technically capture everything, but in practice, it rarely does. Coverage degrades over time, external APIs get forgotten, and during incidents, you're left asking "did anyone log this?" instead of debugging. Automatic capture solves this.
Why observability tools are missing critical debugging data (no matter how you sample)
There's a common belief in the observability space: if you just collect more data, you'll have what you need to debug any issue. The reality is more frustrating: even with 100% unsampled observability, you're still missing critical debugging data.
With Spec-Driven Development we've come full circle to Big Design Up Front
Better specs and clearer task decomposition are a significant step forward. But specs and plans describe intentions. What AI agents also need is visibility into what systems actually do at runtime.
Why AI can't debug your API integrations (yet)
The next generation of debugging doesn’t depend exclusively on the quality of AI models, but it’s heavily dependent on feeding AI tools the context they need to be useful.
Multiplayer 2025: year in review
In 2025 we focused on a simple but ambitious goal: making debugging faster, less fragmented and less manual. Check out all our releases to make that possible.
Multiplayer vs LogRocket: which session replay tool actually fixes bugs?
LogRocket captures frontend behavior with optional sampled backend data through third-party integrations. Multiplayer captures complete, unsampled full-stack sessions (frontend and backend) out of the box, with no integrations required.
Multiplayer vs Mixpanel: which session replay tool actually fixes bugs?
Mixpanel shows you how users behave on your frontend, aggregating website performance metrics. Multiplayer shows how your system behaves, from user actions to backend traces, and how to fix a bug (or have your AI coding assistant do it for you).
Multiplayer vs PostHog: which session replay tool actually fixes bugs?
PostHog is a product analytics platform with frontend-only session replay. Multiplayer is purpose-built for debugging with full-stack session recordings, from user actions to backend traces, showing you how to fix a bug (or have your AI coding assistant do it for you).
Multiplayer vs Fullstory: which session replay tool actually gives you the full story?
Fullstory shows you how users behave on your website, aggregating performance metrics. Multiplayer shows how your system behaves, from user actions to backend traces, and how to fix a bug (or have your AI coding assistant do it for you).
Session Replay
Multiplayer sketches: annotating session recordings for better collaboration
Annotations are a way to draw, write, and comment directly on top of full-stack session recordings. Now, instead of sketching ideas in isolation, teams can mark up actual user sessions, highlighting specific UI elements, API calls, and backend traces that need attention.
Distributed Systems
Six best practices for backend design in distributed system
Most modern software systems are distributed systems, but designing a distributed system isn’t easy. Here are six best practices to get you started.
Session Replay
High user satisfaction scores aren’t worth a burned-out team
Multiplayer transforms the chaos of support tickets, eliminating manual work, sloppy hand-offs, and grepping through log files.
Session Replay
Full stack session recordings: end-to-end visibility in a single click
Multiplayer gives your team full stack session recordings so you have all the context you need to fix bugs, build features, and supercharge your AI tools. This is all the data you wish was easy to get from your APM tool and screen recorder - all in one place.
Session Replay
Collect what matters: how Multiplayer stays lightweight without losing context
Full stack session recordings capture everything that matters without impacting your application performance or adding unnecessary overhead.
Session Replay
From session replay to development plan: annotations in full stack session recordings
Add sketches, notes, and requirements directly to your full stack session recordings. Highlight interactions, API calls, or traces and turn them into actionable development plans or AI prompts.
AI
Multiplayer MCP server: brings full stack session recordings into your IDE of choice
Multiplayer MCP Server streams full stack session data into your IDE. Give AI tools complete context for accurate fixes: frontend, backend, annotation.
Session Replay
Continuous session recording, reimagined
Record sessions in the background while you work: Multiplayer saves recordings the moment bugs or anomalies occur, making it effortless to capture elusive, hard-to-reproduce problems.
Session Replay
Don’t lose the trace that matters: Multiplayer’s zero-sampling approach
Multiplayer is the only session recorder that combines frontend replays with unsampled backend traces, stitched together automatically. You don’t have to choose between drowning in noise or missing the critical data.
News
Multiplayer launched on Product Hunt (but why?)
Product Hunt may be a rigged game, but we launched anyway. Discover why Multiplayer is betting on full stack session recordings, not orange arrows.
Session Replay
Four key practices to reduce Mean Time to Resolution (MTTR)
With the new Multiplayer browser extension, you can start capturing full stack session recordings instantly, right from your browser.
Session Replay
Automatically create test scripts from a full stack session recording
Turn a full stack session recording into a reproducible test script. It’s like getting a unit test written by the bug itself. Minus the guesswork, setup, and manual scripting.