mpai

Make existing Codex and Claude Code sessions multiplayer

Developer ToolsArtificial IntelligenceOpen Source

▲ 0 votes6 commentsLaunched Aug 3, 2026

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Open-source terminal multiplayer for Codex and Claude Code. Join a teammate's explicitly shared native session from another Mac, arrive with the real context, and prompt with your name attached. Tailscale stays private; the host Mac stays in control.

AI Analysis

📝 Summary

mpai is an open-source terminal tool that enables multiplayer collaboration on existing Codex and Claude Code sessions. Core features include joining a teammate's explicitly shared native Mac session with full context, prompting with name attribution, privacy via Tailscale, and host control. It solves key pain points like cumbersome context sharing and lack of real-time team input in AI-assisted coding workflows. The unique value proposition is turning solitary AI coding into seamless, secure multiplayer sessions without disrupting native workflows or compromising control.

📈 Market Timing

The market timing is favorable for 2025-2026 as AI coding assistants like Claude are reaching high maturity and widespread adoption in software development. Remote and hybrid team workflows are increasing demand for collaborative AI tools. Tailscale's secure networking is established, and economic focus on developer productivity tools supports this. Overall, it capitalizes on the trend of enhancing individual AI tools with team features. Excellent Timing.

✅ Feasibility

Overall feasibility is High. Technical integration with native terminal sessions and Tailscale is achievable with moderate difficulty given the product's existence as open-source. Development and operation costs are low due to its open-source model and community contributions. Minimal supply chain or compliance risks as a software dev tool focused on Mac. Strong scalability potential within the developer community, though ongoing maintenance for evolving AI APIs is needed. High.

🎯 Target Market

Main target segments: Software developers and engineering teams (ages 25-40) using AI coding tools in terminals on Macs, primarily in tech hubs across North America and Europe. Industries: Software development, startups, and IT services. Estimated TAM for AI dev tools ~$10B+, SAM for collab features ~$1B, SOM for this Mac/terminal niche ~$50M. Core pain points: Ineffective real-time collaboration and context loss in AI sessions. Willingness to pay: Moderate; open-source appeals to individuals, with potential for team/enterprise sponsorships or add-ons.

⚔️ Competition

Competition level is Low. Direct competitors: 1. Tuple (tuple.app) - pair programming screen sharing; 2. VS Code Live Share (visualstudio.microsoft.com/services/live-share) - real-time IDE collab; 3. Replit (replit.com) - cloud IDE with multiplayer editing; 4. Cursor (cursor.com) - AI-powered editor with limited team features. This product's advantages: Native terminal integration for Codex/Claude with real context and name-attributed prompts, open-source, Tailscale privacy, and host control. Disadvantages: Mac-only, narrower scope than full IDE solutions, requires explicit session sharing setup.

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