Cursor vs JetBrains AI Assistant: VS Code Fork or Native IntelliJ Integration?

Yes, JetBrains AI Assistant is available in all JetBrains IDEs, including IntelliJ IDEA, PyCharm, WebStorm, PhpStorm, GoLand, CLion, and Rider. The AI features are consistently available across all products, with specific optimizations per language and framework. It is bundled with the All Products subscription, meaning no additional cost for AI features if you already hold a JetBrains license.

Yes, but it is a significant transition due to the ecosystem difference. Cursor is based on VS Code, which has a different extension ecosystem and keybindings. JetBrains offers a VS Code keymap extension to ease the transition. Cursor AI capabilities are stronger for generative tasks thanks to Composer and Agent modes. The biggest loss is the refactoring engine and static analysis, which is significantly more powerful in JetBrains for statically typed languages like Java and Kotlin.

JetBrains AI Assistant delivers blazing-fast code completions thanks to local indexing and deep understanding of the type system. Cursor Tab completions are also fast but more dependent on cloud models for complex suggestions. For pure speed, JetBrains may have the edge with statically typed languages, but Cursor suggestions are often contextually richer for generative tasks due to the larger language models and broader codebase context it sends along with each request.

Composer mode is Cursor's most powerful feature: an AI interface that can make coherent changes across multiple files simultaneously. You describe what you want to achieve and Composer generates the code changes across all relevant files. This differs from traditional AI autocomplete that only operates within a single file. Agent mode goes even further, autonomously creating files, running terminal commands, and iteratively solving problems without manual intervention between steps.

Yes, Cursor supports Java through VS Code Java extensions from Microsoft and Red Hat. The basic Java experience is functional, but it lacks the deep static analysis, refactoring power, and project structure understanding of IntelliJ IDEA. For simple Java projects or microservices, Cursor works well enough. For large enterprise Java applications with complex dependency structures and extensive refactoring needs, JetBrains IntelliJ with AI Assistant remains the clearly better choice.

Both tools offer privacy options. Cursor provides a Privacy Mode that prevents code from being sent to external servers for training purposes. JetBrains offers on-premise deployment options for organizations that cannot send any code to cloud providers. Always verify which data is transmitted to LLM providers and configure privacy settings according to your organization requirements. For enterprise environments with strict data classification, JetBrains provides more mature compliance tooling.

For larger teams, enterprise features like SSO, RBAC, and audit logging are essential. JetBrains provides these features natively through JetBrains Space and the Enterprise subscription tier. Cursor Business offers team features and admin controls, but the enterprise features are less mature than JetBrains. The choice depends on your existing tool stack: JetBrains teams choose AI Assistant, VS Code teams choose Cursor. Consistency across the team matters more than individual AI feature comparisons.