By CognitionSan Francisco, United States1 product across 1 category
Strong fit. Autonomous agent that takes a ticket and works it to completion. There is a free tier, with paid plans above it.
Free plan
Yes
Free plan at $0
Month to month
$20/mo
Pro
Billed yearly
—
No yearly price published
Watch out: Autonomy means less visibility into what changed — review discipline matters more, not less. Larger organisations may still be routed through sales rather than self-serve.
By QodoTel Aviv, Israel1 product across 1 category
Strong fit. Writes unit tests against existing code and suggests the cases you did not think of, inside the editor.
Free plan
Yes
Free tier for individuals
Month to month
$30/mo
Pro Team, sold to teams rather than to one person
Billed yearly
—
No yearly price published
Watch out: Generated tests can assert current behaviour rather than correct behaviour, which passes and proves nothing. One plan sold in credit packs rather than a ladder: the price is the pack you pick, it is designed for up to 30 users, and overage is capped at a figure you set.
By MintlifySan Francisco, United States1 product across 1 category
Strong fit. Publishes developer documentation from your repository and drafts the pages from the code itself.
Free plan
Yes
Starter, free with five editor seats
Month to month
$540/mo
Pro
Billed yearly
$450/mo
Pro plan −17%
Watch out: The AI writing is the smaller half; most of the value is the publishing. There is nothing between the free tier and $450 a month, so the decision is whether five editors is enough rather than which plan to buy.
By LangChainSan Francisco, United States1 product across 1 category
Strong fit. The standard framework for wiring a model to your own data, with tracing so you can see why it answered as it did.
Free plan
Yes
Open-source framework; LangSmith Developer is free for one seat, 5,000 traces a month
Month to month
$39/mo
Plus
Billed yearly
—
No yearly price published
Watch out: A developer library, not an application. Both LangSmith tiers meter traces above a monthly allowance, so the seat price is a floor rather than the bill, and the free tier is one seat only.
All plans (3)
Plan
Price
What you get
Free
$0
Open-source framework; LangSmith Developer is free for one seat, 5,000 traces a month
By AmazonSeattle, United States2 products across 1 category
Strong fit. The assistant that already has your AWS account in context, which makes it the practical choice for questions about infrastructure you actually run.
Free plan
Yes
Amazon Q Developer free tier with limited agentic requests a month, the latest Claude models
Month to month
$19/mo
Amazon Q Developer Pro
Billed yearly
—
No yearly price published
Watch out: Sold and billed through AWS on top of your cloud bill. Q Developer Pro is $19 a user a month; Q Business is a separate product at $3 (Lite) or $20 (Pro) a user a month, with a 60-day trial for up to 50 users.
All plans (4)
Plan
Price
What you get
Free
$0
Amazon Q Developer free tier with limited agentic requests a month, the latest Claude models, and use in the IDE or CLI
Amazon Q Developer Pro
$19/mo
Amazon Q Business Lite
$3/mo
60-day free trial for up to 50 users per application
Amazon Q Business Pro
$20/mo
60-day free trial for up to 50 users per application
By GitHubSan Francisco, United States2 products across 1 category
Built for this. The default, and the one already wired into the editor and the pull request your team uses. A free tier now covers light use.
Free plan
Yes
2,000 completions a month
Month to month
$10/mo
Pro
Billed yearly
—
No yearly price published
Watch out: Suggestions are strongest on common patterns and weakest exactly where your codebase is unusual. Pro and above bundle a monthly credit allowance, so premium-model work is metered on top of the seat.
By Augment ComputingPalo Alto, United States1 product across 1 category
Strong fit. Built for codebases large enough that context is the whole problem, and it indexes the repository rather than reading files on demand.
Free plan
No
Paid from the start
Month to month
$20/mo
Standard
Billed yearly
—
No yearly price published
Watch out: Individual plans were retired in 2026, so the entry price is a team one — flat, not per seat, which makes it unusually cheap per head on a large team. What you buy is a usage allowance rather than seats: $20 buys $20 of it, and anything beyond is topped up pay as you go.
By TabnineTel Aviv, Israel1 product across 1 category
Strong fit. Can run entirely inside your own infrastructure with no code leaving it, which is why regulated teams still choose it.
Free plan
No
Paid from the start
Month to month
$39/mo
Code Assistant
Billed yearly
—
No yearly price published
Watch out: It withdrew its free tier and every individual plan during 2025 — there is no way for one developer to buy it any more, only a team. Both tiers are annual and neither has a checkout: the button on each is Get a quote.
By Pieces for DevelopersCincinnati, United States1 product across 1 category
Strong fit. Remembers what you were doing across your editor, browser and terminal, and can keep all of it on your own machine.
Free plan
No
Paid from the start
Month to month
$18.99/mo
Pro
Billed yearly
$14.17/mo
$169.99 a year, Pro plan −25%
Watch out: A memory layer rather than a coding assistant — it will not write the code. The free tier is gone: every plan now starts with a seven-day trial that asks for a card, and the value only appears after weeks of use.
Two things separate these and both are on every card.
Fit
Whether a tool is built for this job, a strong fit for it, or
able to do it without that being its focus.
Free plan
Whether there is a tier you can keep using rather than a
trial that expires.
The order
Fit first, then a free plan, then alphabetical. There is
no score, no weighting we decline to publish, and nothing on this site a company can buy.
Questions
What is the best ai for software development?
There is no single answer, which is why this page lists 13 rather than one: Cursor, Claude Code, Devin, CodeRabbit, Qodo, Mintlify, LangChain / LangSmith, Amazon Q, GitHub Copilot, Augment Code, Tabnine, JetBrains AI, Pieces. 4 of them are built for this kind of work rather than able to do it. Start with a free one.
Which of these have a free plan?
9 of the 13: Cursor, Devin, CodeRabbit, Qodo, Mintlify, LangChain / LangSmith, Amazon Q, GitHub Copilot, JetBrains AI. Free means a real free tier you can keep using, not a trial that expires.
How was this list chosen?
By hand, from the 750 products this site tracks, and it is checked against the catalogue on every build — a product renamed or removed breaks the build rather than quietly disappearing from here. Nothing on this site can be paid for: no listing, no position, no wording.
