Do either of these have a managed pricing tier?

No. The fact sheet records no verified plans for either product, and both require you to bring your own API key.

Can I use either without VS Code?

Cline is listed as a VS Code extension only. Aider is listed for macOS, Windows, and Linux as a CLI.

Are they open source?

Yes. Both are recorded as open source under Apache 2.0.

Do they have official documentation?

No documentation is listed for either product in the fact sheet.

Where do my actual costs come from?

Both tools are free; the fact sheet notes that cost depends on the underlying provider's token pricing, and for Cline it adds that cost can escalate quickly without per-task budgets.

Aider vs Cline: How They Actually Differ

Both are free, open-source AI coding agents that require you to bring your own API key. Cline fits VS Code users who want an inspectable extension with approval-gated terminal execution. Aider fits terminal-native developers who want automatic git commits and broader documented model choice.

Compiled 2026-08-21 from our catalogue entries for Aider and Cline.

The short answer

Pick Cline if: You work in VS Code and want an inspectable agent inside the editor, with plan/act modes and approval gates on terminal commands.
Pick Aider if: You live in the terminal on macOS, Windows, or Linux and want every accepted change committed to git, plus BYOK support across OpenAI, Anthropic, Gemini, DeepSeek, and local Ollama.
Cheapest way in: Both are free to install and both require your own API key; there is no managed pricing tier on file for either, so your real cost tracks the token pricing of whichever provider you connect.
What we could not compare: Documented plan tiers, official documentation links (none listed for either product), and any capability not recorded in the fact sheet.

Cline and Aider are both free, open-source AI coding agents released under Apache 2.0, and both follow a bring-your-own-key model with no managed pricing tier on file. They differ on where they run: Cline is a VS Code extension, while Aider is a command-line tool available on macOS, Windows, and Linux.

The workflow split shows up in how each tool feels in use. Cline emphasizes an inspectable agent loop inside VS Code, with plan/act modes and approval-gated terminal execution. Aider emphasizes terminal-native pair programming with every accepted change auto-committed to git, and it documents BYOK support across OpenAI, Anthropic, Gemini, DeepSeek, and local Ollama models.

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	Cline
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

Fully open source under Apache 2.0 with no vendor lock-in.
Bring-your-own-key support across OpenAI, Anthropic, Gemini, DeepSeek, and local Ollama models.
Every accepted change is committed to git with a generated message.

Full Aider entry

Where Cline is the better fit

Runs inside VS Code as an extension, so there is no separate app to install.
Open source under Apache 2.0 with a transparent agent loop you can inspect.
Supports plan/act modes and approval-gated terminal execution.

Full Cline entry

Which one should you pick?

Solo founder who already lives in VS Code

Cline

It installs as a VS Code extension with no separate app and offers plan/act modes plus approval gates on terminal commands.

Small team that works from the terminal and keeps everything in git

Aider

It runs on macOS, Windows, and Linux as a CLI, and auto-commits each accepted change with a generated message.

Developer who wants documented model flexibility beyond a single provider

Aider

The fact sheet lists BYOK support for OpenAI, Anthropic, Gemini, DeepSeek, and local Ollama.

Frequently asked questions

Do either of these have a managed pricing tier?: No. The fact sheet records no verified plans for either product, and both require you to bring your own API key.
Can I use either without VS Code?: Cline is listed as a VS Code extension only. Aider is listed for macOS, Windows, and Linux as a CLI.
Are they open source?: Yes. Both are recorded as open source under Apache 2.0.
Do they have official documentation?: No documentation is listed for either product in the fact sheet.
Where do my actual costs come from?: Both tools are free; the fact sheet notes that cost depends on the underlying provider's token pricing, and for Cline it adds that cost can escalate quickly without per-task budgets.

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/cline — checked 2026-05-25 · 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.

## Cline (/tools/cline)
Tagline: Open-source autonomous coding agent for VS Code, formerly known as Claude Dev.
Category: AI Coding Agents
Pricing model: free
Starts at: Free
Platforms: vscode-ext
Public repo: https://github.com/cline/cline
Docs: none listed
Verified plans: none on file
Strengths on file: Runs inside VS Code as an extension, no separate app to install.; Open source under Apache 2.0; transparent agent loop you can inspect.; Supports plan/act modes and approval-gated terminal execution.
Limits on file: Requires bringing your own API key — no managed pricing tier.; Cost can escalate quickly without per-task budgets.
Cline is an open-source autonomous coding agent that runs inside VS Code — formerly known as Claude Dev.
Its draw is transparency in a familiar editor: it's a VS Code extension with no separate app, open source under Apache 2.0 with an agent loop you can inspect, and it supports plan/act modes with approval-gated terminal execution.
It's for VS Code users who want an inspectable agent with a human in the loop. Two caveats: it needs your own API key — there's no managed pricing tier — and cost can escalate quickly without per-task budgets.
It's the in-VS-Code, open option next to terminal agents like Aider and Claude Code.

Change log

2026-08-21 — First published, compiled from the catalogue entries for Aider and Cline.