Aider vs Continue

Aider is a CLI-first tool that builds a map of your entire codebase, enabling it to work on large multi-language projects (100+ languages). It automatically commits changes with sensible messages, runs linters/tests on every edit, and supports voice-to-code and image/web page context. It integrates with Claude 3.7 Sonnet, DeepSeek R1 & Chat V3, OpenAI o1/o3-mini, and local LLMs. Continue, on the other hand, is an open-source IDE extension for VS Code and JetBrains. Its standout features include shareable agents via public links, a code review inbox with PR filters, and instant apply edits (replacing streaming diffs). The latest update added GPT-5 Codex Responses API and Grok Code Fast 1 support. However, Continue was acquired by Cursor and its repository is now read-only—no further active development. Aider recently added alternative DeepSeek V3 providers for reliability and adopted uv for installation. Aider's Git-aware workflow gives it an edge for reversible, transparent changes, while Continue's agent-sharing and IDE integration benefit teams collaborating within an editor.

Both tools are free at the base level. Aider is freemium: the CLI is free, but you pay for LLM API usage (e.g., Claude, DeepSeek, OpenAI) when using cloud models. You can also use local models at no API cost. Continue is fully free and open-source, with no usage limits. However, since Continue is now read-only after Cursor's acquisition, there is no paid tier planned and no guaranteed future maintenance. Aider remains actively maintained, making it the better long-term investment. For cost-conscious users, Aider's support for local LLMs and cost-effective model combinations (e.g., DeepSeek R1+Claude Sonnet) can minimize API bills. Continue's BYOM model also lets you avoid cloud costs if you self-host, but you'll need to manage the infrastructure. Overall, Aider offers more flexible pricing depending on your model choice, while Continue is a one-time free download but now stagnant.