Multiplayer is described as 'Runs locally alongside tools like Claude Code, Codex, and Copilot. From there, it feeds your agent the full-stack, pre-correlated, and unsampled data and context observability tools miss. Operating with a secure, local-first approach, we intelligently deduplicate' and is an app in the development category. There are five alternatives to Multiplayer for Self-Hosted, Web-based and SaaS. The best Multiplayer alternative is FullStory. It's not free, so if you're looking for a free alternative, you could try SessionStack or LogRocket. Other great apps like Multiplayer are OpenReplay and highlight.io.