Trae (formerly MarsCode)

TRAE is an AI-native coding IDE and agent workspace with repository context, custom agents, MCP, rules, memories, skills and browser preview/debugging. IDE workflows let developers review changes, while paid SOLO capabilities support autonomous tasks. Current plans offer ongoing limited Free access and paid memberships with dollar-based usage allowances; legacy and regional offers have separate eligibility.

✨ Key Features

• AI coding IDE — Work inside an editor with repository-aware assistance.
• IDE mode — Collaborate with AI while reviewing and directing changes.
• Autonomous agent mode — Use paid SOLO capabilities for multi-step tasks and applicable Work cloud tasks.
• Custom agents — Define agents with specialized tools, skills, and logic.
• Sub-agents — Coordinate specialized agents for larger tasks.
• MCP support — Connect agents to external resources and tools.
• Rules and memories — Customize behavior and preserve project context.
• Browser preview — Let agents inspect and debug browser experiences.
• Repository understanding — Use codebase context for implementation work.
• Language support — Support common languages including Go, Java, Python, and Node.js.
• TraeCode — Use the coding-engineer-oriented product for development teams.

💳 Pricing

• Free — Limited AUTO usage, 5,000 autocomplete requests/month and 2 concurrent Work cloud tasks; SOLO is not included.
• Lite — $8/month or $80/year, $8 monthly usage and 2 concurrent cloud tasks. Offered only in selected regions listed in the official billing documentation.
• Pro — $20/month or $200/year, $20 monthly usage and 10 concurrent cloud tasks.
• Pro+ — $60/month or $600/year, $60 monthly usage and 15 concurrent cloud tasks.
• Ultra — $200/month or $2,000/year, $200 monthly usage and 20 concurrent cloud tasks. Paid plans include all supported models and unlimited autocomplete.
• On-demand — Optional token-billed usage beyond the allowance, charged at each accumulated $3. Annual totals are paid annually; usage depends on model and task.
• Eligibility — Legacy continuous subscriptions can retain different rates. The February 13, 2026 announcement's 14-day trial required a new account to add payment within 48 hours and then auto-renewed; current new-plan documents do not confirm that offer, so it is not advertised here as a current trial.

⚖️ Alternatives Compared

🎯 Use Cases

• Feature development: Describe and implement changes across a repository.
• Bug fixing: Ask agents to investigate and patch code.
• MVP building: Use autonomous modes to scaffold a product quickly.
• Code review: Review AI-proposed edits while retaining control.
• Debugging: Inspect browser previews and console behavior.
• Custom workflows: Build agents for recurring engineering tasks.
• MCP integrations: Connect external services and project resources.
• Team development: Use TraeCode and shared agent practices across a team.