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F Free (26 tools)

G

GitHub Copilot

AI pair programmer in every IDE

Free for open source maintainers — unlimited
W

Windsurf

Agentic IDE with Cascade flow

Free tier: unlimited autocomplete + basic chat
C

Cline

Autonomous coding agent in VS Code

Free tool — pay only for LLM API usage
A

Aider

AI pair programming in your terminal

Free open source — Apache 2.0 license
Z

Zed

Ultra-fast collaborative code editor with AI

Core editor free & open source (Apache 2.0)
C

CodeGeeX

Multilingual AI coding assistant with Chinese-first support

Fully free — no usage limits, no API key needed
C

Continue

Open-source AI code assistant for any IDE

Free open source — pay only for LLM API
T

Trae

ByteDance's free AI-powered IDE

Fully free with built-in domestic LLM access
A

Amazon Q Developer

AWS-native AI coding companion with auto-upgrades

Free tier: unlimited completions + 50 security scans/month
O

OpenHands

Open-source autonomous coding agent

Free open source — self-host on Docker
G

Gemini CLI

Google's free AI coding agent with 1M+ context

Free — 1000 requests/day, no credit card required
W

Warp

Modern AI terminal with block-based output

Free for personal use — all core features included
C

CodeRabbit

AI-powered PR reviews with deep code understanding

Free forever for public open-source repos
Q

Qodo

AI code review + auto-generated test suites

Free for individual developers
S

Sourcery

Instant Python code quality reviews and refactoring

Free for open-source projects
D

DeepSource

Static analysis + AI auto-fix for comprehensive coverage

Free for public repositories
S

Snyk Code

Security-first AI code review for CI/CD pipelines

Free for open source
K

Katalon

Comprehensive AI-assisted testing platform

Community Edition: free web, mobile & API testing
B

Bolt.new

Full-stack web apps in your browser with WebContainers

Free tier for prototyping and small projects
L

Lovable

Vibe coding leader: from idea to deployed app

Free tier: build and preview apps
B

Bubble

Mature no-code platform for complex web applications

Free development mode; pay only when you launch
R

Retool

Build internal tools fast with drag-and-drop + code

Free tier for small teams (up to 5 users)
T

ToolJet

Open-source Retool alternative for internal apps

Free self-hosted — open source (AGPL)
S

SWE-Agent

Open-source agent that fixes GitHub issues autonomously

Free open source — pay only for LLM API calls
C

Codacy

Automated code review with security and coverage analysis

Free for open-source projects
B

Blackbox AI

AI code completion for 20+ programming languages

Free forever: unlimited basic chat & standard code completion

T Free Trial (15 tools)

C

Cursor

AI-first code editor built on VS Code

14-day free Pro trial (no credit card required)
W

Windsurf

Agentic IDE with Cascade flow

30-day free Pro trial
T

Tabnine

Enterprise-grade AI code assistant with air-gapped deployment

90-day enterprise trial (full features, on-prem or cloud)
D

Devin AI

Fully autonomous AI software engineer

Core plan at $20/mo — 96% price cut from previous $500 entry point
K

Kiro CLI

AWS CLI agent with spec-driven development

50 free credits/month for new users — enough for small projects
C

CodeRabbit

AI-powered PR reviews with deep code understanding

14-day free Pro trial for private repos
D

Diffblue Cover

AI-powered Java unit test generation at scale

Free Community Edition for open-source projects
T

Testim

AI-powered E2E testing with self-healing locators

Free trial available
M

Mabl

Low-maintenance E2E testing with auto-adaptation

Free trial available
A

Applitools

AI visual regression testing with cross-browser precision

Free trial available
J

JetBrains Junie

Deep AI agent natively integrated into JetBrains IDEs

Free trial available
M

Manus

General AI agent that autonomously completes complex tasks

Free tier with limited credits available
L

LambdaTest

Cross-browser testing cloud with AI-powered test orchestration

Free lifetime tier — 60 minutes of automated testing per month
S

SonarQube

Continuous code quality and security inspection

Free Community Edition for unlimited projects and users
C

CodeClimate

Automated code review and quality metrics platform

Free for public repositories — unlimited

E Education (6 tools)

S Startup (2 tools)

$ Money-Saving (13 tools)

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