Is Aider or Devin better?

Neither clearly leads. Aider starts at Free and Devin at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.

Which is cheaper, Aider or Devin?

Aider has a free tier; the other does not. Paid plans start at Free for Aider and On request for Devin.

Does Aider or Devin run on more platforms?

Aider runs on mac, linux, windows, api. Devin runs on Desktop, Windsurf integration, Web.

What is Aider best used for?

Aider is most often used for editing an existing codebase from the terminal, pairing with an llm on a new project, automating git-committed code changes, working across many programming languages. Of those, editing an existing codebase from the terminal and pairing with an llm on a new project are not what Devin is typically brought in for.

What can Aider do that Devin cannot?

Aider covers Multi-LLM support, Repository mapping, Git integration, Voice-to-code.

AI Tools · head to head

Aider vs Devin

Aider

AI Tools

AI pair programming in your terminal

From: Free
Rated: -

Full review Website

Devin

Software Development

Autonomous AI software engineer planning and executing code in its own environment

From: On request
Rated: -

Full review Website

The short version

Only Aider has a free tier, so it costs nothing to try first.
Each has a real cost: Aider requires comfort working in a terminal rather than a graphical IDE; Devin pricing not published; specific costs and plan tiers require signup or contact with sales

Where they differ

Only the attributes on which Aider and Devin actually diverge.

Attributes where Aider and Devin differ
Attribute	Aider	Devin
Starting price	Free	On request
Pricing model	open-source	subscription
Free tier	Yes	No
Platforms	mac, linux, windows, api	Desktop, Windsurf integration, Web
Category	AI Tools	Software Development
Founded	2023	Unknown

Identical on both: user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Aider

Multi-LLM support
Repository mapping
Git integration
Voice-to-code
Lint and test automation
Image and web context
Free provider access
Editor file-watching

Only in Devin

Nothing recorded that Aider does not also cover.

What people use each for

The jobs each tool is most often brought in to do.

Aider

Editing an existing codebase from the terminalnot Devin
Pairing with an LLM on a new projectnot Devin
Automating git-committed code changesnot Devin
Working across many programming languagesnot Devin
Bringing your own LLM API key to a coding workflownot Devin

Devin

Feature implementation and ticket resolution in established codebasesnot Aider
Code migrations and refactoring at scale across repositoriesnot Aider
Bug fixing and debugging with test-driven verificationnot Aider
Rapid prototyping and proof-of-concept developmentnot Aider
Repetitive implementation tasks freeing human engineers for complex designnot Aider

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Aider

Requires comfort working in a terminal rather than a graphical IDE
Has no hosted or managed version, so users must supply and pay for their own LLM API access separately
Depends heavily on the chosen underlying model's quality, so results vary by which LLM is configured
Lacks a built-in autonomous multi-step task runner comparable to agent-style products

Devin

Pricing not published; specific costs and plan tiers require signup or contact with sales
Cannot handle extremely difficult tasks reliably; success rate decreases with task complexity
Requires clear, well-scoped task descriptions; ambiguous requirements reduce effectiveness
Requires human oversight and integration into existing workflows; not fully autonomous

Pricing, plan by plan

Aider

Free

No published plan breakdown. See the Aider review.

Devin

On request

No published plan breakdown. See the Devin review.

Which should you pick?

Choose Aider if

You need multi-llm support.
You want to start without paying.
You work on mac, linux, windows, api.
You also want repository mapping.

Aider review

Choose Devin if

You work on Desktop, Windsurf integration, Web.

Devin review

Questions people ask

Is Aider or Devin better?: Neither clearly leads. Aider starts at Free and Devin at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Aider or Devin?: Aider has a free tier; the other does not. Paid plans start at Free for Aider and On request for Devin.
Does Aider or Devin run on more platforms?: Aider runs on mac, linux, windows, api. Devin runs on Desktop, Windsurf integration, Web.
Can I use Aider for free?: Yes. Aider has a free tier, so you can try it without paying. Devin starts at On request.
What is Aider best used for?: Aider is most often used for editing an existing codebase from the terminal, pairing with an llm on a new project, automating git-committed code changes, working across many programming languages. Of those, editing an existing codebase from the terminal and pairing with an llm on a new project are not what Devin is typically brought in for.
What can Aider do that Devin cannot?: Aider covers Multi-LLM support, Repository mapping, Git integration, Voice-to-code.

Answered from the vendors’ own pages

Aider: Is Aider free to use?

Aider itself is free and open source, released under the Apache 2.0 license. Users must separately supply and pay for API access to the LLM they choose to use with it.

Source

Aider: Which LLMs can I use with Aider?

Aider connects to OpenAI, Anthropic, Gemini, GROQ, DeepSeek, Ollama, Azure, Cohere, xAI, GitHub Copilot, Vertex AI, Amazon Bedrock, OpenRouter and most other LLM providers via API keys.

Source

Aider: Can I use Aider for free without paying for an LLM API?

Yes, Aider can be used at no cost through OpenRouter's free model access (subject to daily usage limits) or Google's Gemini 2.5 Pro Exp, which the docs note performs well without a paid API key.

Source

Aider: How does Aider handle version control?

Aider automatically stages and commits each change it makes to a connected git repository, generating a descriptive commit message for every edit so changes stay reviewable and reversible.

Source

Aider vs Devin

Aider

Devin

The short version

Where they differ

What each one covers

Only in Aider

Only in Devin

What people use each for

Aider

Devin

Where each one falls short

Aider

Devin

Pricing, plan by plan

Aider

Devin

Which should you pick?

Choose Aider if

Choose Devin if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on Aider

More on Devin

Keep looking

Other head to heads