Best AI Coding Agents for IntelliJ IDEA

JetBrains Junie is an innovative AI coding assistant that works inside many JetBrains IDEs to streamline programming efforts and boost efficiency. This agent leverages advanced AI to help developers write, test, and inspect code without leaving their familiar development environment. Junie offers both code execution and interactive collaboration, allowing programmers to switch between automated code writing and brainstorming sessions for features and improvements. By deeply understanding the codebase, Junie identifies the best ways to tackle tasks and ensures all changes meet quality standards through syntax and semantic checks. It also runs tests to minimize errors and keep the project healthy, freeing developers from routine tasks. Many developers have successfully built complex applications and games using Junie, highlighting its flexibility across different languages and frameworks. The AI adapts to each task’s complexity and workflow, making coding less tedious and more focused on creativity. Whether you are building a simple web app or a complex game, Junie offers smart support throughout the development cycle.

Introducing your AI coding companion: GitHub Copilot, which provides whole line or entire function suggestions directly within your coding environment. Drawing from billions of lines of publicly available code, GitHub Copilot ensures that essential knowledge is always at your disposal, allowing you to save valuable time and maintain your concentration. Currently accessible as an extension for Visual Studio Code, it operates seamlessly both on your local machine and in the cloud via GitHub Codespaces. Its responsiveness allows you to receive suggestions in real-time as you type. Supporting a wide array of frameworks and programming languages, the technical preview excels particularly in Python, JavaScript, TypeScript, Ruby, and Go, while also having the capability to assist with numerous other languages. With GitHub Copilot, you maintain complete control over the coding process, as you can sift through various suggestions, decide which ones to implement or dismiss, and make manual adjustments to the proposed code. Additionally, GitHub Copilot fine-tunes its recommendations based on your coding style, ensuring a more personalized programming experience. This innovative tool truly empowers developers by enhancing productivity and creativity in their coding endeavors. GitHub Copilot Coding Agent simplifies the software development process by automating low-to-medium complexity tasks such as bug fixes, feature additions, and code refactoring. Integrated directly into GitHub, the agent operates in the background when issues are assigned, using GitHub Actions to run a fully customizable development environment.

Augment Code is an AI agent built to enhance the coding experience for software engineers working with large and complex codebases. It integrates effortlessly into IDEs like Visual Studio Code, IntelliJ IDEA, Node, and Vim, offering a suite of tools for SDK migration, code refactoring, and code documentation. By leveraging machine learning, Augment Code automatically adapts to a developer’s style and memory, improving the quality of code generation and ensuring consistency across multiple repos. The platform is compatible with over 100 native and MCP tools, enabling engineers to debug, explain, and refine code in their familiar environments without needing to switch tools. Augment Code's deep integration with popular collaboration platforms like GitHub and Slack further streamlines workflows, making it easier for teams to collaborate and maintain high-quality code. Trusted by leading software teams, Augment Code helps developers write code like senior engineers, boosting productivity and reducing the complexity of large projects.

Zencoder is a cutting-edge platform that harnesses the capabilities of AI coding agents to enable developers to expedite their product delivery. By utilizing embedded AI agents, Zencoder enhances the process of code generation through comprehensive syntactic and semantic analysis of both your repository and the output code. This innovative approach ensures that our AI coding agents continuously refine the results, allowing you to maintain awareness and expertly navigate the challenges of software development. Experience the transformative potential of AI-enhanced code generation, as Zencoder seamlessly incorporates context-sensitive code into your projects, significantly speeding up your development workflow while maintaining accuracy. With Zencoder, you can interact with a smart coding companion that offers immediate support, insightful responses, and tailored solutions that cater to your specific coding requirements, making the development process smoother and more efficient. This combination of intelligent assistance and advanced technology not only elevates your coding experience but also empowers you to focus more on creativity and innovation.

GoCodeo is a comprehensive AI platform for developers that accelerates coding, testing, and debugging processes. The platform integrates with VS Code to offer real-time assistance, from generating code snippets to automatically creating unit tests. GoCodeo’s AI-driven tools also provide debugging insights, enabling developers to identify and fix issues faster. With support for multiple programming languages and frameworks, GoCodeo empowers developers to write high-quality, production-ready code with less effort, streamlining development cycles and enhancing efficiency across projects.

Goose, also referred to as codename goose, is an open-source AI agent that operates locally on machines, designed to facilitate the automation of engineering tasks within a terminal or integrated development environment (IDE). By efficiently performing functions such as code creation, debugging, and deployment, it allows developers to shift their focus towards more complex problem-solving activities. Its flexible architecture supports customization with various large language models (LLMs) and the integration of external APIs, which broadens its functionality to meet the unique demands of different projects. By taking on intricate tasks autonomously, Goose simplifies the development workflow, thereby enhancing overall productivity and minimizing the need for manual intervention. Users have expressed appreciation for Goose's capabilities in managing responsibilities like dependency updates, test execution, and code migration automation, underscoring its usefulness in practical scenarios. Furthermore, as the landscape of software development evolves, tools like Goose are becoming increasingly vital for maintaining efficiency in a fast-paced environment.

GPT-4.1 represents a significant upgrade in generative AI, with notable advancements in coding, instruction adherence, and handling long contexts. This model supports up to 1 million tokens of context, allowing it to tackle complex, multi-step tasks across various domains. GPT-4.1 outperforms earlier models in key benchmarks, particularly in coding accuracy, and is designed to streamline workflows for developers and businesses by improving task completion speed and reliability.

Firebender is an innovative AI-driven tool that aids developers in Android Studio by enhancing the coding experience and boosting overall productivity. This tool automates various aspects of code generation, assists with debugging, and streamlines the Android app development process. Firebender adeptly recognizes coding patterns, proposes effective solutions, and is capable of delivering real-time error corrections, which accelerates the development timeline and reduces the likelihood of errors. Serving as a resourceful assistant, it supports developers in tasks ranging from constructing user interfaces to handling API requests and fine-tuning intricate algorithms by producing code snippets, recommending best practices, and providing documentation help right within the Android Studio environment. This resource is perfect for developers of all skill levels who aim to optimize their workflow and efficiently create top-notch Android applications, ultimately transforming the way coding projects are approached and executed.

Refact.ai is an advanced AI-powered assistant that integrates directly into your IDE, offering intelligent code completion, real-time code suggestions, and automatic refactoring to streamline the coding process. By using the AI model trained on your codebase, Refact.ai adapts to your team's style, providing highly relevant recommendations to enhance productivity. Developers can also fine-tune the assistant to better suit their unique requirements, making it a powerful tool for personalized coding assistance. With support for all major IDEs and secure on-premise deployment, Refact.ai empowers developers to increase code quality, reduce time spent on manual tasks, and achieve faster results.

Introducing an advanced generative AI assistant designed specifically for software development tasks. Amazon Q agents enhance efficiency throughout the entire software development lifecycle by autonomously managing a variety of responsibilities, from feature implementation, documentation, testing, and code review to refactoring and executing software upgrades. With Amazon Q Developer, the entire development process is simplified. This expert tool is well-versed in AWS, providing support for optimizing cloud expenses and resources, offering advice on architectural best practices, investigating operational issues, and addressing networking problems. Additionally, Amazon Q Developer agents significantly expedite the transformation of large-scale enterprise workloads, including tasks such as transitioning .NET applications from Windows to Linux, modernizing mainframe applications, migrating VMware workloads, and upgrading Java. By streamlining these processes, Amazon Q Developer ultimately helps organizations reduce costs and improve overall productivity.

Fynix serves as an AI-driven platform aimed at enhancing software development efficiency by providing smart coding assistance and agent-based code reviews. This tool seamlessly integrates with widely used IDEs such as VS Code, offering features like context-aware autocomplete, natural language inputs for code corrections and translations, along with automatic visualizations of code flow. The Code Assistant feature of Fynix enables developers to produce cleaner and more efficient code at an accelerated pace, and the forthcoming Code Quality Agent promises to streamline bug detection while upholding coding standards. Supporting a variety of programming languages and frameworks, and compatible with tools like Jira, Fynix proves to be a flexible solution for fostering improved coding practices and team collaboration. As developers strive for excellence in their coding endeavors, Fynix stands out as an essential ally in the software development landscape.

Auggie CLI seamlessly integrates Augment’s intelligent coding agent into your terminal, utilizing an advanced context engine to evaluate code, implement changes, and run tools in both interactive sessions and automated workflows. Developers can easily set it up through npm, which requires Node.js 22 or higher and a compatible shell, and they can initiate a full-screen interactive experience using the command auggie, featuring real-time updates, visual progress indicators, and conversational tools suitable for debugging, developing new features, reviewing pull requests, or managing alerts. Furthermore, Auggie provides optimized modes for automation that are perfect for continuous integration and deployment pipelines, as well as for handling background tasks. The CLI also facilitates the use of custom slash commands to streamline repeatable processes, integrates with various external tools and systems through native integrations and Model Context Protocol (MCP) servers, and can be scripted within pipelines or GitHub Actions for tasks such as automatically generating pull request descriptions. Ultimately, Auggie CLI revolutionizes the coding experience by combining intelligent assistance with robust automation capabilities.