Aider vs Kilo Code: How They Actually Differ
Aider suits terminal-first developers who want git commits on every accepted change and can bring their own model key. Kilo Code suits VS Code users who want a free extension that merges Cline and Roo Code with extra power-user modes. Both are free and open source.
Compiled 2026-09-02 from our catalogue entries for Aider and Kilo Code.
The short answer
- Pick Aider if
- You live in the terminal, want every accepted change auto-committed to git with a generated message, and are happy bringing your own key for OpenAI, Anthropic, Gemini, DeepSeek, or a local Ollama model.
- Pick Kilo Code if
- You work inside VS Code, want a free extension that merges Cline and Roo Code with extra power-user modes, and do not need JetBrains, CLI, or web access.
- Cheapest way in
- Both tools list a Starts-at price of Free, and neither lists any paid tier on file.
- What we could not compare
- No verified plans are on file for either product, so specific plan names, seat counts, and paid-tier limits are not recorded.
Aider is an open-source CLI coding agent that pair-programs in your terminal and commits each accepted change to git with a generated message. It runs on mac, Windows, Linux, and any CLI environment, is licensed under Apache 2.0, and takes a bring-your-own-key setup across OpenAI, Anthropic, Gemini, DeepSeek, and local Ollama models. There is no GUI and no inline-edit overlay; cost tracks whichever provider's token pricing you bring.
Kilo Code is an open-source VS Code extension that merges features from Cline and Roo Code into a single agent, plus extra power-user modes. It is distributed as a free VS Code extension with no paid tier, and its codebase is open for community inspection. The trade-off is that it is VS Code only — no JetBrains, CLI, or web interface — and because it pulls in two upstream projects it inherits their maintenance and compatibility churn.
Side by side
Every cell is a field on our catalogue entry for that tool, copied as recorded. Rows where the two differ come first; blank fields say so rather than being filled in.
| Aider | Kilo Code | |
|---|---|---|
| Runs on | mac, win, linux, cli | vscode-ext |
| Category | AI Coding Agents | AI Coding Agents |
| Pricing model | Free | Free |
| Starts at | Free | Free |
| Public source code | Yes — public repo | Yes — public repo |
| Public docs | Not listed | Not listed |
- Public source code: From the repository link on each catalogue entry, not a licence audit.
Where Aider is the better fit
- Apache-2.0 open source with no vendor lock-in and a public repo.
- Bring-your-own-key across OpenAI, Anthropic, Gemini, DeepSeek, and local Ollama models.
- Every accepted change is committed to git with a generated message.
Where Kilo Code is the better fit
- Open-source codebase that allows community inspection and contributions.
- Merges features from Cline and Roo Code into one extension, combining two established agents.
- Includes power-user modes aimed at advanced coding workflows beyond basic completions, as a free VS Code extension.
Which one should you pick?
It runs in the CLI on mac, Windows, and Linux, auto-commits every accepted change to git, and lets you bring your own key across OpenAI, Anthropic, Gemini, DeepSeek, or Ollama.
It ships as a free VS Code extension that merges Cline and Roo Code and adds power-user modes, with no paid tier required.
Aider is CLI only with no inline-edit overlay, and Kilo Code is a VS Code extension only. The fact sheet does not list either as a GUI-based editor agent.
Frequently asked questions
- Are Aider and Kilo Code free?
- Both list their Starts-at price as Free. No verified plans are on file for either product, so paid-tier details are not recorded.
- Which platforms does each one support?
- Aider lists mac, Windows, Linux, and CLI. Kilo Code lists vscode-ext only — no JetBrains, CLI, or web interface is on file.
- Do I need to bring my own API key?
- Aider explicitly supports bring-your-own-key for OpenAI, Anthropic, Gemini, DeepSeek, and local Ollama models. The Kilo Code fact sheet does not record its key or model setup.
- How does git fit in?
- Aider commits every accepted change to git with a generated message. The Kilo Code fact sheet does not record git behavior.
- What about enterprise support or paid tiers?
- The Kilo Code fact sheet calls out no enterprise tier and no dedicated support channels compared with commercial alternatives. Aider lists no verified plans on file.
What we compared
This page states nothing that is not in the two catalogue entries below. The exact text used to write it is reproduced here so you can check our reading, and both tools link through to their own pages and to the vendor.
- /tools/aider — checked 2026-05-25 · official site
- /tools/kilocode — checked 2026-06-14 · official site
Show the source text
## Aider (/tools/aider) Tagline: Open-source CLI coding agent that pair-programs in your terminal and commits to git automatically. Category: AI Coding Agents Pricing model: free Starts at: Free Platforms: mac, win, linux, cli Public repo: https://github.com/Aider-AI/aider Docs: none listed Verified plans: none on file Strengths on file: Fully open source under Apache 2.0; no vendor lock-in.; Bring-your-own-key for OpenAI, Anthropic, Gemini, DeepSeek, and local Ollama models.; Every accepted change is committed to git with a generated message. Limits on file: No GUI — command-line only; no inline-edit overlay like Cursor.; Cost depends entirely on the underlying provider's token pricing. Aider is an open-source CLI coding agent that pair-programs in your terminal and commits each change to git automatically. Its edge is openness and git discipline: Apache-2.0 with no lock-in, bring-your-own-key across OpenAI, Anthropic, Gemini, DeepSeek, and local Ollama models, and every accepted change landing as a git commit with a generated message. It fits developers who live in the terminal and want a model-agnostic agent tied to version control. The trade-offs: there's no GUI or inline-edit overlay like Cursor's — it's command-line only — and cost tracks whatever provider's token pricing you bring. It's the open, BYOK terminal agent next to Anthropic's Claude Code and IDE-native Cursor. ## Kilo Code (/tools/kilocode) Tagline: Open-source VS Code coding agent merging the best of Cline and Roo Code with extra power-user modes. Category: AI Coding Agents Pricing model: free Starts at: Free Platforms: vscode-ext Public repo: https://github.com/Kilo-Org/kilocode Docs: none listed Verified plans: none on file Strengths on file: Open-source codebase that allows community inspection and contributions.; Merges features from both Cline and Roo Code, combining two established AI coding agents into a single extension.; Includes power-user modes aimed at advanced coding workflows beyond basic completions.; Available as a free VS Code extension with no paid tier required. Limits on file: Only available as a VS Code extension, with no support for JetBrains, CLI, or web-based interfaces.; As a fork that merges Cline and Roo Code, it depends on multiple upstream projects that can introduce maintenance and compatibility issues.; Lack of an enterprise tier or dedicated support channels compared to commercial alternatives. Kilo Code is an open-source VS Code coding agent that merges features from Cline and Roo Code into one extension, with extra power-user modes. Its pitch is both, plus more: it combines two established open agents in a single free VS Code extension, adds power-user modes for workflows beyond basic completion, and keeps an open codebase anyone can inspect. It's for VS Code users who want the union of Cline and Roo Code without picking one. Two caveats: it's VS Code only — no JetBrains, CLI, or web — and because it merges two upstream projects, it inherits their maintenance and compatibility churn. It's the merge-of-both option next to its parents, Cline and Roo Code, in the open, in-VS-Code lane.
Change log
- 2026-09-02 — First published, compiled from the catalogue entries for Aider and Kilo Code.