How much does Aider cost?

Free and open source (Apache 2.0). There is no subscription or paid tier; you bring your own LLM API key, so the only cost is your chosen model provider's token usage. Run local models via Ollama for zero inference cost.

What are the best alternatives to Aider?

Based on documented capability coverage across the Agentic Index 14 point taxonomy, the closest alternatives to Aider among coding agents are Blitzy, Cosine, Tabnine, Augment Code. Each is graded on the same public evidence, and no vendor pays for placement.

Can Aider be self hosted or run in a private VPC?

Full under the Agentic Index verification standard. Aider publishes public evidence of self hosted or private VPC deployment, along with data residency options for controlling where agent data is processed and stored. Evidence basis: An Apache 2.0 CLI that runs on the developer's own machine and edits the local git repository, and it works with local models through Ollama or any OpenAI compatible local server, so code and inference can stay on the customer's hardware. a. Graded from public evidence only against the Agentic Index 14 point capability taxonomy. No vendor pays for placement.

Does Aider give you tracing and observability into agent runs?

Full under the Agentic Index verification standard. Aider publishes public evidence of tracing, observability and audit logging into agent runs, so a team can see what an agent did and why. Evidence basis: Every AI edit is committed to git with a generated message, so each change is a diffable record that /diff shows and /undo reverts, and the session is written to a chat history file by default, with an option to log the full conversation wi. Graded from public evidence only against the Agentic Index 14 point capability taxonomy. No vendor pays for placement.

Does Aider require human approval before an agent acts?

Full under the Agentic Index verification standard. Aider publishes public evidence of human approval steps and guardrails, so an agent action can be held for review before it executes. Evidence basis: Aider asks for confirmation before it runs a shell command it suggests, adds a file to the chat or fetches a URL, with bulk accept or reject for a series of confirmations and a --yes-always flag that is off by default; ask mode never edits,. Graded from public evidence only against the Agentic Index 14 point capability taxonomy. No vendor pays for placement.

Back to vendors

Aider

Q: Who is Aider for?

Terminal-first developers, Engineers who want to keep their existing Git workflow, Teams running local models for privacy or air-gapped environments, Developers who switch between LLM providers by cost or capability, Open-source and solo developers

Also known as: aider.chat, aider-chat, Aider-AI

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Coding agentindependentVerified 2026-09-29

Entry priceFree / OSSFull pricing detail

Open source, model agnostic terminal coding agent that edits your local git repo directly, with a tree-sitter repository map for whole project context and an architect mode pairing a reasoning model with a cheaper editor model.

Aider is an open-source AI pair programming tool that runs entirely in your terminal and edits code directly in your local Git repository. Instead of replacing your editor, it works alongside your existing command-line and Git workflow: you add the files you want to change, describe the change in plain English, and Aider writes the edits across one or more files and commits each change to Git with a sensible, descriptive commit message.

Because every edit is a normal Git commit, you can diff, review, undo, or revert anything the AI does using the Git tools you already use. A defining feature is its repository map, which uses tree-sitter parsing to build a PageRank-ranked index of your whole codebase, covering function signatures, class definitions, and cross-file references, so the model understands how a large project fits together without loading every file into context.

Aider is fully model-agnostic: through LiteLLM it connects to almost any LLM, including Anthropic's Claude, OpenAI's GPT and o-series, DeepSeek, Google Gemini, xAI Grok, and local models run via Ollama, so you bring your own API key and switch providers based on cost or capability. Its Architect mode pairs an expensive reasoning model for planning with a cheaper model for the actual file edits to lower session cost.

Beyond core editing, Aider supports 100+ programming languages, can lint and test code automatically and fix the problems it finds, accepts images and web pages as context, offers voice-to-code, and integrates with editors such as VS Code, JetBrains, Vim, and Emacs through its --watch mode and in-code 'AI?' comments.

Created in 2023 by independent developer Paul Gauthier and released under the Apache 2.0 license, Aider has grown to 44,000+ GitHub stars and 6.8 million installs, and also maintains the widely cited Aider polyglot leaderboard for benchmarking how well LLMs edit code. It is free to use; the only cost is the token spend on whichever model provider you choose.

Vendor details

Canonical URL

https://aider.chat

Subcategory

Coding — CLI agent (OSS)

Funding status

Independent open-source project; no external/VC funding disclosed.

Company status

independent

Use cases & customers

Primary use cases

AI pair programming in the terminalEditing and refactoring existing codebasesBuilding new projects from scratchMulti-file edits across a Git repositoryGit-native automatic commits and change historyRunning local or air-gapped models via Ollama for private codeArchitect mode: plan with one model, edit with a cheaper oneAdding features, fixing bugs, and writing tests from natural language

Target customers

Terminal-first developersEngineers who want to keep their existing Git workflowTeams running local models for privacy or air-gapped environmentsDevelopers who switch between LLM providers by cost or capabilityOpen-source and solo developers

Deployment options

Self-hosted CLILocal terminal (pip/Homebrew)Editor/IDE integration via --watch

Integrations

Connects to 100+ LLMs through LiteLLM, including Claude, OpenAI GPT and o-series, DeepSeek, Gemini, xAI Grok, and local models via Ollama, with bring-your-own-API-key routing. Git-native (automatic commits, diff, undo). Editor-agnostic integration with VS Code, JetBrains, Vim, and Emacs via --watch mode and in-code 'AI?' comments. Installs via pip/pipx or Homebrew, supports 100+ programming languages, and can run your linters and test suites automatically.

In practice

You want AI editing your actual codebase, not pasting snippets from a chat window. Aider works in your terminal, edits files directly in your local Git repo, and commits each change with a descriptive message.

On a big codebase the AI loses track of how files connect. Aider builds a repository map with tree-sitter, so the model understands your project's structure without loading every file into context.

You don't want to be locked to one model's pricing. Aider is model-agnostic through LiteLLM, so you bring your own key and switch between Claude, GPT, Gemini, or a local model as cost dictates.

Sources & related URLs

Related / legacy domains

https://pypi.org/project/aider-chat/ https://aider.chat/docs/leaderboards/ https://aider.chat/blog/

Research sources

https://aider.chat https://github.com/Aider-AI/aider https://aider.chat/docs/

Agentic Index coverage score

9.5 / 14 capabilities · 68%

Integrations & Tool Calling	Partial
The agent works through git, runs configurable lint and test commands, offers to run shell commands it suggests, scrapes web pages into the chat with /web, and takes image and voice input. No MCP client, plugin system or integration surface for external services is documented. Sourceaider.chat/docs/config/options.html and usage/commands.html; aider.chat/docs/usage/commands.htmlread 2026-09-29
Workflow Orchestration	Full
Architect mode hands a change from an architect model, which proposes it, to a separate editor model, which turns it into file edits, and after edits aider lints and optionally tests, then tries to fix the errors whenever a command returns a non zero exit code, a documented condition in the flow. Sourceaider.chat/docs/usage/modes.html and usage/lint-test.htmlread 2026-09-29
Knowledge Grounding & RAG	Full
A repository map lists the repo's files with the key symbols each defines and their critical definition lines, and a graph ranking over a file dependency graph selects the most relevant parts to fit a token budget set by --map-tokens; read only reference files and scraped web pages can be added as further context. Sourceaider.chat/docs/repomap.htmlread 2026-09-29
Human Oversight & Guardrails	Full
Aider asks for confirmation before it runs a shell command it suggests, adds a file to the chat or fetches a URL, with bulk accept or reject for a series of confirmations and a --yes-always flag that is off by default; ask mode never edits, and /undo reverts the last aider commit. Sourceaider.chat/HISTORY, docs/faq.html and config/options.html; aider.chat/history.htmlread 2026-09-29
Security, Identity & Governance	Not documented
Aider is a local CLI with no hosted service, accounts or organization layer, so no SSO, role based access, audit logging or attestation is offered or claimed; an.aiderignore file limits what enters the AI's context and analytics can be switched off. Sourceaider.chat/docs/config/options.htmlread 2026-09-29
Observability & Auditability	Full
Every AI edit is committed to git with a generated message, so each change is a diffable record that /diff shows and /undo reverts, and the session is written to a chat history file by default, with an option to log the full conversation with the LLM, which together show what the agent changed and why. Sourceaider.chat/docs/usage.html and config/options.html; aider.chat/docs/config/options.htmlread 2026-09-29
Memory & State Persistence	Partial
The chat is written to.aider.chat.history.md and --restore-chat-history reloads the prior conversation on launch so work can continue, which is agent written state carried across sessions. No stated lifetime or purge path is documented beyond clearing the chat. Git commits record the code's changes rather than serving as memory. Sourceaider.chat/docs/config/options.html and HISTORYread 2026-09-29
Deployment & Data Residency	Full
An Apache 2.0 CLI that runs on the developer's own machine and edits the local git repository, and it works with local models through Ollama or any OpenAI compatible local server, so code and inference can stay on the customer's hardware. Sourceaider.chat/docs/llms.html and github.com/Aider-AI/aiderread 2026-09-29
Prebuilt Agents, Templates & Packs	Partial
The docs point to an official Aider-AI conventions repository, a community collection of ready made conventions files (Bash scripts, Flutter, functional programming, Go, Next.js with TypeScript and others) loaded with /read to steer the agent. These are guidance files rather than prebuilt agents or task templates, and no further library is published. Sourceaider.chat/docs/usage/conventions.html and github.com/Aider-AI/conventionsread 2026-09-29
Triggers & Channel Coverage	Partial
Work starts from the person: the interactive terminal chat, a one shot --message flag for scripts, and a watch mode that acts when the developer writes an AI! or AI? comment in any file. Nothing runs on a schedule, webhook or repository event. Sourceaider.chat/docs/usage/watch.html and scripting.htmlread 2026-09-29
Model Flexibility & Routing	Full
Connects on the customer's own keys to OpenAI, Anthropic, Gemini, Groq, xAI, Azure, Cohere, DeepSeek, OpenRouter, GitHub Copilot, Vertex AI, Amazon Bedrock and any OpenAI compatible API, plus local models through Ollama and LM Studio; main, editor and weak models are set separately and /model switches mid session. Sourceaider.chat/docs/llms.html and config/options.htmlread 2026-09-29
APIs, SDKs & MCP Extensibility	Partial
Aider can be scripted from the command line with --message and from Python through its Coder class. The scripting page says the Python API is not officially supported or documented and may change without notice, and no HTTP API, SDK or MCP server is offered. Sourceaider.chat/docs/scripting.htmlread 2026-09-29
Testing, Debugging & Optimization	Full
The repository ships a benchmark harness with setup and run instructions that measures how well aider and a chosen model turn coding requests into code that passes unit tests, with custom models and edit formats and a YAML report of pass rates, cost and timing; the project publishes its polyglot leaderboard of 225 exercises in six languages from it. Sourcegithub.com/Aider-AI/aider/benchmark and aider.chat/docs/leaderboards; github.com/aider-ai/aider/blob/main/benchmark/readme.mdread 2026-09-29
Browser & Computer Use	Not documented
Aider edits files, runs shell commands and scrapes web pages into markdown with /web, but it does not drive a browser or operate software through a graphical interface. Sourceaider.chat/docs/usage/commands.htmlread 2026-09-29

The Agentic Index coverage score grades every vendor Full, Partial or Not documented against the same 14 buyer facing capabilities, from public evidence only. Each capability links to how all vendors in the index score on it. How this evidence is graded

Pricing

Free / OSS

usage

Free tier

What is public

Aider is 100% free and open source (a terminal CLI tool) with no subscription, paid tiers, or premium features. You bring your own LLM API key (Anthropic, OpenAI, OpenRouter, Google, xAI, DeepSeek, or local models via Ollama). The only cost is whatever your model provider charges per token.

Billing mechanics

There is no Aider billing; the tool is free. All cost is pass-through model API token spend on whatever provider and model you route to. Aider is model-agnostic with explicit per-request model routing, so you control cost by choosing cheaper models (for example DeepSeek) or running local models for $0 inference.

Cost watchouts

Your LLM API bill is the real cost — roughly $10–$30/mo moderate use, $50–$200+/mo heavy; frontier models (Opus/GPT-5) cost far more than budget models; auto-commit-per-edit and codebase mapping add token overhead

Variable cost rationale

Pure pass-through token billing means spend is fully usage- and model-driven — zero subscription floor, but uncapped API exposure under heavy use

Additional watchouts

There is no managed offering, SLA or markup, but you own all API cost management and setup, and Aider's model guidance lags 2026 frontier models.

Sales call required

No, self serve available

Free / trial

Free (OSS self-host)

Commercial notes

Apache 2.0 open source that runs locally in your repo with no vendor account and commits each edit to git. Release cadence slowed in 2026 (latest stable v0.86.2, Feb 2026).

Key ambiguities

Actual cost depends entirely on which model and provider you choose and on usage volume; there is no Aider-set price to quote.

Cancellation / refund

No contract or subscription — nothing to cancel; you manage billing directly with your model provider

Support SLA / resale

Community/open-source support (GitHub); no vendor SLA or enterprise tier

Missing data

Not applicable: there is no vendor pricing, and cost is your own model provider token spend.

Agentic Index verified 2026-09-29

Official pricing page

Related vendors

Alternatives to Aider

The closest documented capability profiles to Aider among coding agents tracked by Agentic Index, ordered by similarity on the same 14 point evidence the rankings use. No vendor pays for placement.

Blitzy8.5 / 14Adds documented Security, Identity & Governance
Cosine8.5 / 14Adds documented Security, Identity & Governance
Tabnine11.5 / 14Adds documented Security, Identity & GovernanceAider vs Tabnine →
Augment Code12.0 / 14Adds documented Security, Identity & Governance
Charm10.0 / 14Adds documented Security, Identity & GovernanceAider vs Charm →
GoCodeo7.0 / 14Fuller documented coverage on Integrations & Tool Calling

Similarity is computed from each vendor's Agentic Index coverage score evidence, axis by axis, not from the totals. How this evidence is graded

Compare Aider with other vendors →Compare all coding agents →See where Aider ranks →

Data confidence: high

Head to head

Aider vs Anthropic Claude Code Aider vs OpenAI Codex Aider vs Cline Aider vs Goose Aider vs OpenCode Aider vs Charm Aider vs Tabnine Aider vs Trae