What Is MarsCode?MarsCode 是什么？
MarsCode (豆包 MarsCode, marscode.com) was ByteDance's AI programming assistant, launched in 2024 as a derivative of the Doubao (豆包) product line. It shipped in two forms: an out-of-the-box cloud IDE that ran in the browser with zero setup, and plugins for local IDEs (VS Code / JetBrains) that brought AI assistance into traditional workflows. The built-in AI assistant covered code completion, generation, explanation, and bug fixing, and the platform supported 100+ programming languages. It was free for individual users, and it also linked into ByteDance's ecosystem apps such as Feishu for quick access.MarsCode（豆包 MarsCode，marscode.com）是字节跳动 2024 年推出的 AI 编程助手，源自豆包产品线。它有两种形态：浏览器里开箱即用的云端 IDE（零配置），以及给本地 IDE（VS Code / JetBrains）用的插件，把 AI 能力带进传统开发流程。内置 AI 助手覆盖代码补全、生成、解释、修复，平台支持 100+ 编程语言，个人免费，并曾在飞书等字节系应用内提供便捷入口。
The brand then evolved: the team behind it rebuilt the experience as the AI-native IDE TRAE — international edition in January 2025, China edition in March 2025. Media coverage describes TRAE plainly as the successor: "TRAE 的前身是豆包 MarsCode". In August 2026 the TRAE team merged into ByteDance's Doubao programming product line, and on October 9, 2026, TraeCode and TraeWork merged into the unified TRAE platform (Agent + IDE modes).随后品牌完成演进：原团队把体验重做成 AI 原生 IDE TRAE——2025 年 1 月国际版、3 月中国版上线。媒体报道直言：「TRAE 的前身是豆包 MarsCode」。2026 年 8 月 TRAE 团队并入豆包体系编程产品线；2026 年 10 月 9 日，TraeCode 与 TraeWork 合并为统一 TRAE 平台（Agent + IDE 双模式）。
Today, visiting marscode.com lands you on the Trae AI IDE site — the MarsCode name survives mainly as history. Confirm current quotas and prices on the official site.今天打开 marscode.com，看到的是 Trae AI IDE 站点——MarsCode 这个名字更多是历史了。最新额度与价格以官网为准。
MarsCode matters as history, not as a product you can sign up for today: it was ByteDance's first serious swing at AI-assisted coding, proved that a free, browser-based AI IDE had an audience, and then became the seed of TRAE. The honest guidance is simple — if you liked MarsCode, you want TRAE now (trae.cn in China is completely free). Keep this page bookmarked for the lineage; do your building on the successor.
MarsCode 的意义在历史，不在今天——它是字节在 AI 辅助编程上的第一次认真出手，证明了免费、浏览器里的 AI IDE 有受众，然后成了 TRAE 的种子。实在的建议就一句：喜欢 MarsCode 的，现在去用 TRAE（中国版 trae.cn 完全免费）。这页留着当族谱，干活去继任者那边。
— 中国吧 AI Tools Hub Editorial Team
Who Should Use MarsCode?谁适合使用MarsCode？
✓ Good Fit For适合以下场景
- Former MarsCode users tracing where their tools went (→ TRAE)想弄清自己用的工具去哪了的 MarsCode 老用户（→ TRAE）
- Students who want a free, zero-setup coding environment想要免费、零配置编程环境的学生
- Anyone evaluating ByteDance's AI coding lineage before choosing TRAE选型 TRAE 前想了解字节 AI 编程沿革的人
✕ Not Ideal For不适合以下场景
- New sign-ups — the standalone MarsCode brand no longer operates新注册——MarsCode 独立品牌已不再运营
- Teams needing long-term vendor stability guarantees需要长期厂商稳定性承诺的团队
Getting Started with MarsCodeMarsCode 快速开始
1. Know where it went: marscode.com now opens the Trae AI IDE site先认路：marscode.com 现在打开的是 Trae AI IDE 站点2. Start free on the successor: trae.cn (China, free) or trae.ai (international)去继任者那里免费起步：trae.cn（国内，免费）或 trae.ai（国际）3. Former users: export code/data from the old cloud IDE and check migration notices老用户：从旧云端 IDE 导出代码与数据，查看官方迁移公告Key Features核心功能
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Out-of-the-Box Cloud IDE开箱即用的云端 IDE — No download, no configuration — pick a template in the browser and start coding in seconds.不用下载、不用配置——浏览器里选个模板，几秒钟开写。
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Local IDE Plugins本地 IDE 插件 — Extensions for VS Code and JetBrains IDEs brought the AI assistant into familiar workflows.VS Code 与 JetBrains 插件，把 AI 助手带进熟悉的工作流。
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Built-In AI Assistant内置 AI 助手 — Code completion, generation, explanation, and bug fixing across the full development flow.代码补全、生成、解释、修复，覆盖完整开发流程。
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100+ Programming Languages100+ 编程语言 — Broad language and project-type support for learning, prototyping, and shipping.语言与项目类型覆盖广，学习、原型、上线都够用。
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One-Click Cloud Functions & Deploy云函数与一键部署 — Cloud functions with automatic schema handling plus one-click elastic deployment and API access.云函数自动处理 schema，一键弹性部署并生成可访问 API。
Pros & Cons优缺点
✓ Good Fit For适合以下场景
- Free for individual users — zero cost to start个人免费，零成本起步
- Zero environment setup — browser-based cloud IDE零环境配置，浏览器里的云端 IDE
- Chinese-friendly with ByteDance ecosystem touchpoints (e.g. Feishu)中文友好，字节生态（飞书等）触点多
- Its lineage lives on: TRAE carries the same team and mission forward血脉延续：同一团队与使命在 TRAE 身上继续
✕ Not Ideal For不适合以下场景
- The standalone brand was absorbed into TRAE — this is an archival page独立品牌已并入 TRAE，本页为档案性质
- Cloud-based code storage raises privacy questions for sensitive codebases云端存代码，涉密项目有隐私顾虑
- Full functionality requires an internet connection完整功能需要联网
Use Cases应用场景
Popular ways people used MarsCode.人们使用MarsCode的常见场景：
🚀 Rapid Prototyping快速原型
AI coding assistance plus ready-made templates to try ideas fast.AI 编程辅助加现成模板，想法验证飞快。
🎓 Learning New Languages学新语言
AI explanations helped beginners understand and write unfamiliar code faster.AI 讲解帮新手更快读懂、写出陌生语言的代码。
💻 Device-Free Development摆脱设备限制的开发
The cloud IDE freed development from any single machine or location.云端 IDE 让开发摆脱单台设备与地点的限制。
🔌 AI Plugin & GPTs DevelopmentAI 插件与 GPTs 开发
Dedicated tooling to build, test, and deploy AI plugins with automatic schema handling.专用工具链构建、测试、部署 AI 插件，schema 自动处理。
Similar AI Tools相似 AI 工具
If MarsCode doesn't fit your needs, here are other popular AI tools you might consider:如果MarsCode不符合你的需求，可以看看这些热门 AI 工具：