Open source
Pa11y
Open source accessibility testing tools for the command line and CI
AccessibilityAutomated accessibility tests
Alternatives to Accessibility Insights
12 tools like Accessibility Insights, chosen by what they do. About Accessibility Insights
Freemium
Stark
Accessibility checks for design files, code and live sites
AccessibilityAccessibility for designers
Free trial
axe Accessibility Testing
Accessibility testing platform built on the axe-core engine
AccessibilityAccessibility testing tools
Free
WebAIM Contrast Checker
Checks text and background color pairs against WCAG contrast ratios
AccessibilityWCAG contrast checker
Free trial
Polypane
Browser for responsive, accessible and SEO-friendly web builds
AccessibilityBrowser for responsive design
Open source
Leonardo
Open source colour tool for accessible contrast-based scales
Color and GradientsAccessible color scales
Open source
Storybook
Open source workshop for building and testing UI components alone
Design SystemsUI component workshop
Curated
Khroma
Colour generator that learns the colours you like
Color and GradientsAI color palette generator
Popular
Adobe Color
Find, build and save color palettes with a wheel and contrast checks
ColorsColor wheel and themes
Curated
Realtime Colors
Preview color palettes and fonts on a sample website layout
ColorsLive palette preview
Open source
Pencil Project
Free open source tool for GUI mockups and prototypes
WireframingOpen source GUI prototyping
Curated
UserTesting
Platform for gathering feedback from real people on products
User ResearchHuman insight platform