Comparison

Headless UI vs Svelte

On the evidence we track, Svelte leads this comparison with a composite score of 78/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

Headless UI full profile →Svelte full profile →

Machine formatsJSON Markdown GraphQLor send Accept: application/json

Headless UI69

★Svelte78

Attribute comparison across 2 tools
Attribute	Headless UI	SvelteLeader
Vioscale score	69 / 100medium · 62%	78 / 100medium · 71%
Pricing
Free tierpricing.free_tier	✓	✓
Modelpricing.model	commercial	open_source
Price levelpricing.price_level	free	free
Integrations
Countintegrations.count	3	-
Security
Disclosure policysecurity.disclosure_policy	-	✓
Scorecardsecurity.scorecard	4.2	7.9
Vulnerabilitiessecurity.vulnerabilities	Count: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=%40headlessui%2Freact&per_page=100 · Last 12m: 0	Count: 14 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=svelte&per_page=100 · Last 12m: 12 · Max severity: HIGH
Adoption
Dependent reposadoption.dependent_repos	45,352	56,439
Github starsadoption.github_stars	28,721	87,991
Package downloads weeklyadoption.package_downloads_weekly	7,182,960	5,781,541
Stackoverflow questionsadoption.stackoverflow_questions	-	9,000
Activity
Commits last 30dactivity.commits_last_30d	-	87
Release
Cadence daysrelease.cadence_days	12	3
Historyrelease.history	20 items	20 items
License
Spdxlicense.spdx	MIT	MIT
Language
Primarylanguage.primary	TypeScript	JavaScript
Market
Availabilitymarket.availability	-	Available worldwide
Content
Faqcontent.faq	-	8 items

Score

Vioscale score

Headless UI69 / 100medium · 62%

Svelte78 / 100medium · 71%

Pricing

Free tier

Headless UI✓

Svelte✓

Model

Headless UIcommercial

Svelteopen_source

Price level

Headless UIfree

Sveltefree

Integrations

Count

Headless UI3

Svelte–

Security

Disclosure policy

Headless UI–

Svelte✓

Scorecard

Headless UI4.2

Svelte7.9

Vulnerabilities

Headless UICount: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=%40headlessui%2Freact&per_page=100 · Last 12m: 0

SvelteCount: 14 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=svelte&per_page=100 · Last 12m: 12 · Max severity: HIGH

Adoption

Dependent repos

Headless UI45,352

Svelte56,439

Github stars

Headless UI28,721

Svelte87,991

Package downloads weekly

Headless UI7,182,960

Svelte5,781,541

Stackoverflow questions

Headless UI–

Svelte9,000

Activity

Commits last 30d

Headless UI–

Svelte87

Release

Cadence days

Headless UI12

Svelte3

History

Headless UI20 items

Svelte20 items

License

Spdx

Headless UIMIT

SvelteMIT

Language

Primary

Headless UITypeScript

SvelteJavaScript

Market

Availability

Headless UI–

SvelteAvailable worldwide

Content

Faq

Headless UI–

Svelte8 items

Capabilities

Feature-by-feature on the axes that matter for frontend ui frameworks. “-” means undocumented, not absent.

Capability comparison for Frontend UI Frameworks
Capability	Headless UI	Svelte
Core
Paradigm	Headless component library	compiler-based component framework
Reusable component model	✓	✓
Rendering
Virtual DOM	✓	✗
Signals / fine-grained reactivity	-	✓
SSR support	✓	✓
DX
First-class TypeScript	-	✗
State
Built-in state management	-	✓
Ecosystem
Official router	-	-
Performance
Runtime size	Tiny (<10kb)	Small (10–40kb)

Core

Paradigm

Headless UIHeadless component library

Sveltecompiler-based component framework

Reusable component model

Headless UI✓

Svelte✓

Rendering

Virtual DOM

Headless UI✓

Svelte✗

Signals / fine-grained reactivity

Headless UI-

Svelte✓

SSR support

Headless UI✓

Svelte✓

First-class TypeScript

Headless UI-

Svelte✗

State

Built-in state management

Headless UI-

Svelte✓

Ecosystem

Official router

Headless UI-

Svelte-

Performance

Runtime size

Headless UITiny (<10kb)

SvelteSmall (10–40kb)

What each one is

The product in its own terms, so the numbers below have context.

Headless UI

Open-source library of fully accessible UI components designed to be completely unstyled, providing seamless integration with Tailwind CSS

Independently observed

Svelte

Leader

A framework with an integrated compiler that lets developers create streamlined components using standard HTML, CSS, and JavaScript, minimizing runtime overhead in the browser.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

Headless UI

Open sourceFree tier

as of 2026-08-13verify ↗

Svelte

Leader

Open sourceFree tier

as of 2026-08-14verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platform and deployment support comparison
Supports	Headless UI	Svelte
WebPlatforms	✓	✓

Platforms

Web

Headless UI✓

Svelte✓

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

Headless UI

3 total

React
Vue
Tailwind CSS

Independently observed

Svelte

Leader

Not documented yet.

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.