Replit AI

Continue is an open-source AI-powered development tool designed to significantly enhance developer productivity. It functions as a highly customizable AI code assistant, allowing developers to create, share, and utilize tailored AI assistants directly within their Integrated Development Environments (IDEs). The core of Continue's offering is delivered through robust open-source extensions compatible with popular IDEs such as VS Code and JetBrains. A key differentiator for Continue is its flexibility in model integration. Developers are empowered to connect and leverage virtually any Large Language Model (LLM) to provide relevant code context, facilitating a personalized and adaptable AI experience. This extensibility enables users to fine-tune their AI code assistants to align perfectly with their specific tech stack, project requirements, and coding style by incorporating custom rules, prompts, and documentation. The platform aims to streamline various aspects of the coding process, including intelligent code completion, code generation, and potentially debugging assistance, thereby fostering an "amplified developer" workflow. For collaborative environments, Continue offers features for centrally managing private AI code assistants, ensuring that teams maintain consistent and up-to-date development tools across their projects. Continue 1.0, a significant milestone, further solidified its commitment to open-source, AI-enhanced development.

Cursor is a cutting-edge AI-first code editor, built as a fork of Visual Studio Code, that aims to revolutionize software development. It integrates advanced artificial intelligence capabilities directly into a familiar coding environment, allowing developers to interact with their codebase using natural language instructions. This enables rapid updates to entire classes or functions with simple prompts, significantly accelerating the software development lifecycle. The editor is equipped with a suite of intelligent features designed to enhance productivity and code quality. Key functionalities include a powerful autocomplete system that predicts and suggests multi-line edits, streamlining the coding process. Furthermore, Cursor offers intuitive tools for inline code generation and refactoring (accessible via commands like Ctrl + K), alongside an in-depth AI chat interface (Ctrl + L) for interactive assistance, debugging, and understanding complex codebases. Launched in 2023 by Anysphere, Cursor leverages various underlying large language models to provide its AI capabilities, adapting its model usage based on the task at hand (e.g., directed changes, codebase navigation, problem-solving, or complex bug resolution). While Cursor itself is a desktop application available for Windows, macOS, and Linux, it is a highly effective tool for developing mobile applications across iOS, Android, and cross-platform environments, even for users with limited or no prior coding knowledge.

Windsurf, formerly known as Codeium, is a cutting-edge AI coding assistant and the world's first AI-native Integrated Development Environment (IDE). It is designed to significantly enhance developer productivity by providing instant, intelligent assistance throughout the entire software engineering lifecycle, moving beyond basic code generation to encompass a broader range of tasks. The platform's core strength lies in its ability to understand the full context of a developer's project, enabling it to assist with complex operations such as navigating directories, executing terminal commands, and managing build processes. This comprehensive approach aims to keep developers in a continuous "flow state," reducing technical debt and accelerating development speed by up to 99%. Windsurf leverages its own in-house frontier AI models, most notably the SWE-1 family, which was launched in May 2025. These models are engineered for high-reasoning and tool-capable performance, comparable to leading models like Claude 3.5 Sonnet and GPT-4.1, while also being designed for cost-efficiency. The Windsurf Editor is available on Mac, Windows, and Linux, and the company also offers plugins for popular IDEs like VS Code and JetBrains.