C
CCode Review & Testing AI toolsFull list
Find bugs and generate tests.
9 tools9 with a free plan2 with an API1 open source
9 tools
CC
Free, from $8/mo
G
GAI coding assistant and agents for editors, terminal, desktop and GitHub
Free, from $10/mo
G
Free, from $10/mo
G
AI coding assistant and agents for editors, terminal, desktop and GitHub
Code AssistantsFree plan
O
OOpenAI's coding agent for the desktop, CLI, IDE, web and iOS, included in ChatGPT plans
Free, from $8/mo
O
Free, from $8/mo
O
OpenAI's coding agent for the desktop, CLI, IDE, web and iOS, included in ChatGPT plans
Code AssistantsFree planAPI
D
DAutonomous AI software engineer that writes, tests and reviews code to merge-ready PRs
Free, from $20/mo
D
Free, from $20/mo
D
Autonomous AI software engineer that writes, tests and reviews code to merge-ready PRs
Code AssistantsFree plan
W
WW
Free, from $20/mo
W
AI coding IDE and command center for running local and cloud coding agents
Code AssistantsFree planAPI
J
JRun and review AI coding agents across projects in JetBrains IDEs, web and CLI
Free, from $10/mo
J
Free, from $10/mo
J
Run and review AI coding agents across projects in JetBrains IDEs, web and CLI
Code AssistantsFree plan
K
KK
Free, from $20/mo
K
Spec-driven agentic coding IDE and CLI for developers and engineering teams
Code AssistantsFree plan
A
AAI coding assistant for AWS developers in the IDE, CLI and AWS Console
Free, from $19/mo
A
Free, from $19/mo
A
AI coding assistant for AWS developers in the IDE, CLI and AWS Console
Code AssistantsFree plan
K
KOpen-source AI coding agent for VS Code, JetBrains, CLI and cloud with 500+ models
Free, from $15/mo
K
Free, from $15/mo
K
Open-source AI coding agent for VS Code, JetBrains, CLI and cloud with 500+ models
Code AssistantsFree planOpen source
Code Review & Testing tools compared
From each vendor's own pages, re-checked every two months. Of 9 tools we checked, 0 of 1 that state a policy don't train AI on your content, and 2 hold SOC 2 or ISO 27001.
How to choose code review & testing tools
All nine tools listed here are freemium, so having a free entry point won't narrow the list. These four differences will:
- Level of autonomy: Devin is described as an autonomous engineer that writes, tests and reviews code through to merge-ready PRs. Amazon Q Developer is described as an assistant, GitHub Copilot offers both an assistant and agents, and Kiro takes a spec-driven approach.
- Where it runs: Start with your current setup. GitHub Copilot, Kilo Code and Amazon Q Developer all list VS Code and JetBrains support. Amazon Q Developer also works in the AWS Console, so it suits teams building on AWS.
- Paid entry price: Paid plans start at $8/mo for OpenAI Codex and Cursor and at $20/mo for Windsurf, Kiro and Devin. Compare what each plan includes, not just the starting price.
- Openness and API access: Kilo Code is the only open-source option, lists self-hosting and offers 500+ models. OpenAI Codex and Windsurf list an API.
We haven't tested these tools, so try them on your own code before committing.
Frequently asked questions
Are there free AI code review and testing tools?
All nine tools listed here are freemium, including GitHub Copilot, Cursor and Kilo Code. Free plan limits aren't covered in our list, so check each tool's pricing page. Kilo Code is also the only open-source option listed.
How much do AI code review and testing tools cost?
Paid plans start between $8/mo and $20/mo. OpenAI Codex and Cursor start at $8/mo, GitHub Copilot and JetBrains AI at $10/mo, Kilo Code at $15/mo, Amazon Q Developer at $19/mo, and Windsurf, Kiro and Devin at $20/mo.
What should I look for in a code review and testing tool?
Look at how much work you want the tool to handle on its own, whether it fits your editor and platforms, what the paid plan costs, and whether you need an API or open-source code. For example, Devin is described as working through to merge-ready PRs, while Kilo Code is open source and lists self-hosting.
What are the alternatives to GitHub Copilot for code review and testing?
Cursor starts lower at $8/mo, compared with $10/mo for Copilot. JetBrains AI also starts at $10/mo and is built around running and reviewing agents. Kilo Code is an open-source alternative for VS Code and JetBrains, and Amazon Q Developer is aimed at AWS developers.