Mellum by JetBrains

Another key feature is its support for a wide variety of languages and frameworks, making it technology-agnostic and adaptable to diverse tech stacks. Mellum works with languages such as Java, Kotlin, Python, JavaScript, TypeScript, C#, C++, Go, PHP, Scala, and HTML, among others, as highlighted by JetBrains' broad language support. This capability allows developers using different tools—whether for web development with WebStorm, game dev with Rider, or data science with DataGrip—to benefit from consistent AI assistance. The system uses advanced static analysis and language-specific models to understand syntax, semantics, and best practices for each language, providing tailored suggestions that align with community standards. This versatility is crucial for teams working on polyglot projects or transitioning between technologies, as it ensures Mellum remains useful regardless of the programming environment, fostering consistency and reducing the learning curve for new tools.

Mellum also includes built-in tools for running, debugging, and testing applications directly within the IDE, eliminating the need for external setups. This feature group encompasses capabilities like integrated debugging sessions, test runners, and performance profilers that leverage AI to identify issues and suggest optimizations. For example, when a developer encounters a bug, Mellum can analyze stack traces, log outputs, and code patterns to propose fixes or highlight potential root causes. By keeping these tools within the IDE, developers maintain a unified view of their code and its execution, streamlining the development lifecycle. This integration reduces context switching and setup time, allowing teams to deliver software faster with higher quality. Additionally, Mellum's AI can learn from debugging sessions to improve future suggestions, creating a feedback loop that enhances its accuracy and usefulness over time.

The overall workflow of Mellum revolves around a continuous, context-aware assistance model that embeds AI into every stage of development. From initial code writing to final testing, Mellum provides real-time support by analyzing the developer's actions, code changes, and project state. Its methodology combines low-latency LLM inference with JetBrains' proprietary code intelligence engines, enabling features like smart completions, automated refactoring, and quality inspections. Developers interact with Mellum through natural language prompts, inline suggestions, and dedicated AI panels within the IDE, creating a collaborative partnership rather than a passive tool. This approach ensures that AI assistance is always relevant and actionable, adapting to individual coding styles and project requirements. By integrating deeply with the IDE's ecosystem, Mellum fosters a workflow where AI enhances human creativity without imposing rigid structures, supporting both exploratory coding and systematic engineering.

Concrete use cases for Mellum include accelerating code reviews by automatically highlighting potential bugs, security vulnerabilities, or style violations using AI-powered static analysis. In scenarios where teams use Qodana for code quality, Mellum can integrate to provide instant feedback on pull requests, reducing review time and ensuring consistency. Another scenario is in rapid prototyping, where developers can generate boilerplate code, API integrations, or test suites through natural language commands, speeding up initial project setup. For businesses, Mellum helps onboard new developers by offering contextual hints and explanations for complex codebases, reducing ramp-up time. Outcomes include faster delivery cycles, as seen with TeamCity's CI/CD pipelines enhanced by AI suggestions for optimization, and improved code maintainability, as Mellum encourages best practices and cleaner architectures. These real-world applications demonstrate how Mellum translates AI capabilities into tangible productivity gains and quality improvements.

Mellum targets software developers, engineering teams, and businesses of all sizes, including Fortune Global 100 companies like Volkswagen, Citibank, and Google that rely on JetBrains tools. It is designed for platforms supporting JetBrains IDEs, such as macOS, Windows, and Linux, and integrates with tech stacks spanning Java, Kotlin, Python, .NET, and more. Pricing and licensing details are tailored for organizations, with options for business solutions that include enterprise-grade support, compliance certifications like SOC 2, and flexible licensing to control costs. The tool empowers teams to leverage AI on their terms, ensuring data security and regulatory adherence while boosting developer satisfaction and ROI. In summary, Mellum by JetBrains delivers fast, integrated LLMs that transform coding workflows, making high-performance AI assistance an integral part of modern software development for individuals and enterprises alike.