UI Guideline is a reference library of precise measurements, spacing, and interaction specs for every UI component — buttons, inputs, modals, navigation, and more. Based on best practices from major design systems.
How UI Guideline compares with its closest alternatives
All 5 closest alternatives have a free plan, as UI Guideline does. Among the 2 that list a starting price, the cheapest is Builder.io at $19 a month and the median is $19. 2 of the 5 offer an API; FalcoScan's records show none for UI Guideline. UI Guideline offers a web app. Of the alternatives, all 5 offer a web app. UI Guideline was founded in 2019; the alternatives were founded between 2016 and 2020, 3 of them earlier.
Market position · Design
How UI Guideline compares in Design
UI Guideline has low opportunity and sits in the bottom third of 351 live Design tools on FalcoScan. Across Design, the average opportunity score is 52.3 and the average saturation score 41.5. FalcoScan rates UI Guideline's own market position as open. 54 of the 351 operating Design tools have hot momentum, and FalcoScan has recorded 23 shutdowns in the category.
UI Guideline compared with its closest alternatives
The closest alternatives to UI Guideline that are still running, matched on the AI capabilities, uses and audience they share, are Checklist Design, Storybook, Builder.io, Checklist Design Pro, and Flowbase.
Is UI Guideline still running?
Yes. As of 1 November 2026, FalcoScan lists UI Guideline as operating at uiguideline.com.
Does UI Guideline have an API?
FalcoScan's records show no public API for UI Guideline.
Who is UI Guideline for?
UI Guideline is built for designers.
How do I sign in to UI Guideline?
Sign in on UI Guideline's own website, uiguideline.com. FalcoScan reviews UI Guideline but does not run its accounts, so logins, passwords and billing are handled by UI Guideline directly.