How much does Aider cost?

Aider is free and open source (Apache 2.0). You pay only for the LLM API you connect it to, or nothing if you use a local model.

Yes. Aider is free and open source (Apache 2.0); there is no managed hosting. You pay only for the LLM API you use.

Does Aider have an API?

Aider has no hosted API, but it can be scripted from the command line (--message) or from Python (from aider.coders import Coder); the Python scripting API is not officially supported.

What platforms does Aider support?

Aider is available on CLI, and web.

Aider is designed for Developers looking to accelerate coding with AI assistance in their terminal; Engineering teams integrating AI into their existing Git-based workflows; Programmers working with diverse programming languages and large codebases.

Aider

Q: What can Aider do?

Aider can: Cloud and local LLM connectivity, Codebase mapping for context, Supports 100+ programming languages, Automatic Git integration. Best for: Developers looking to accelerate coding with AI assistance in their terminal.

Open Source(Apache-2.0)

Verified

AI-Native

AI pair programming in your terminal

No training on your data

Global

Self-hostable

Free Forever

Bootstrapped

Last updated: Oct 16, 2026

Open Source

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Quick Answer

Aider is an open-source AI pair programming tool that operates directly in your terminal, helping developers write and modify code. It works with LLMs like Claude 3.7 Sonnet and GPT-4o, supports over 100 programming languages, and makes a map of your codebase to work well in larger projects. It can start a new project or build on an existing codebase.

About Aider

Aider is an open-source AI pair programming tool that integrates with your terminal and existing codebase. It helps developers start new projects or build on existing code by connecting to various LLMs, mapping your codebase for context, and supporting over 100 programming languages. Aider streamlines development with automatic Git commits and in-IDE integration.

What Makes It UniqueAI

Aider uniquely provides AI pair programming directly in your terminal, integrating deeply with Git and mapping your entire codebase to provide LLMs with comprehensive context for larger projects. It also supports voice-to-code functionality and can work with both cloud and local LLMs.

AI-extracted from public sources. May contain errors. Methodology · Report an error

Decision Intelligence

Best For

Developers looking to accelerate coding with AI assistance in their terminal

Developers integrating AI into their existing Git-based workflow

Programmers working with diverse programming languages and large codebases

Pricing Overview

Type

Open Source

Free Trial

Credit Card

Not Required

Free Plan

Yes

Dimension Scores

· 4.2 avg

How good it is, across universal quality axes

Ease of Use1/10

Customization4/10

Support9/10

Integration1/10

Compliance & Data Protection2/10

Performance8/10

AI-analyzed from product data·High confidenceHow we score

Task Scores

· 6.4 avg

What it can do, per category it works in · showing 8 of 10 tasks scoring 5+

Multi Language Support9/10

Context Understanding9/10

Refactoring8/10

Bug Detection7/10

Code Explanation7/10

Test Generation7/10

Documentation Generation6/10

Performance Optimization5/10

Scores are AI-estimated from publicly available data — not an independent test or a verified user rating. How we rank →

Capabilities

Code

Code Review

Voice

The Model(s) Behind It

Model details — extracted from public vendor sources by our pipeline (Smart Generator + A3 cross-referencing) or admin-entered. Shown as claimed by the vendor; not independently audited by Intelloro.

Uses Models

Claude 3.7 Sonnet DeepSeek R1 o1 o3-mini

Bring your own model — use your own API key or endpoint

Training Data Provenance

Not disclosed

Relevant to EU AI Act Art. 53 / Annex XI (GPAI)

Integrations & Connections

1 connection

Venice AI

Private, uncensored AI — chat, image, video & agents

View

Auto-updated

Build a Stack

Trust Score

75/100

Very Good

Based on 7 data signals

Confidence: High

Reflects publicly available data, not an independent audit

Compliance & Verified38/38

VerifiedYes

Open-source licenseApache-2.0

Human ReviewYes

Operational25/25

Data ResidencyUS

Reliability0/10

No published data

Company17/17

Company ListedYes

User Base1M-10M

FundingBootstrapped

Health—

Not yet checked

AI-Assisted Data

Some details are AI-generated estimates — verify with the vendor.

AI-generated estimate: What Makes Unique

How we source data

AI Governance & Regulatory Disclosures

Legally-sensitive fields — extracted from public vendor sources by our pipeline (Smart Generator + A3 cross-referencing) or admin-entered. Shown as claimed by the vendor; not independently audited by Intelloro.

EU AI Act Risk Tier

Unclassified