Comparison

Ember vs Preact

On the evidence we track, Preact leads this comparison with a composite score of 81/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

Ember full profile →Preact full profile →

Machine formatsJSON Markdown GraphQLor send Accept: application/json

Ember72

★Preact81

Attribute comparison across 2 tools
Attribute	Ember	PreactLeader
Vioscale score	72 / 100medium · 70%	81 / 100medium · 72%
Pricing
Free tierpricing.free_tier	✓	-
Modelpricing.model	open_source	commercial
Price levelpricing.price_level	free	free
Transparentpricing.transparent	✓	-
Security
Disclosure policysecurity.disclosure_policy	✓	-
Scorecardsecurity.scorecard	6.5	5.7
Vulnerabilitiessecurity.vulnerabilities	Count: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=ember-source&per_page=100 · Last 12m: 0	Count: 2 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=preact&per_page=100 · Last 12m: 1 · Max severity: HIGH
Adoption
Dependent reposadoption.dependent_repos	7,078	78,992
Github starsadoption.github_stars	22,566	38,834
Package downloads weeklyadoption.package_downloads_weekly	292,698	31,234,030
Activity
Commits last 30dactivity.commits_last_30d	79	100
Release
Cadence daysrelease.cadence_days	4	13
Historyrelease.history	20 items	20 items
License
Spdxlicense.spdx	MIT	MIT
Language
Primarylanguage.primary	TypeScript	JavaScript
Market
Availabilitymarket.availability	Available worldwide · HQ US	-

Score

Vioscale score

Ember72 / 100medium · 70%

Preact81 / 100medium · 72%

Pricing

Free tier

Ember✓

Preact–

Model

Emberopen_source

Preactcommercial

Price level

Emberfree

Preactfree

Transparent

Ember✓

Preact–

Security

Disclosure policy

Ember✓

Preact–

Scorecard

Ember6.5

Preact5.7

Vulnerabilities

EmberCount: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=ember-source&per_page=100 · Last 12m: 0

PreactCount: 2 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=preact&per_page=100 · Last 12m: 1 · Max severity: HIGH

Adoption

Dependent repos

Ember7,078

Preact78,992

Github stars

Ember22,566

Preact38,834

Package downloads weekly

Ember292,698

Preact31,234,030

Activity

Commits last 30d

Ember79

Preact100

Release

Cadence days

Ember4

Preact13

History

Ember20 items

Preact20 items

License

Spdx

EmberMIT

PreactMIT

Language

Primary

EmberTypeScript

PreactJavaScript

Market

Availability

EmberAvailable worldwide · HQ US

Preact–

Capabilities

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

Capability comparison for Frontend UI Frameworks
Capability	Ember	Preact
Core
Paradigm	Component-based reactive framework	Virtual DOM component library
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	Small (10–40kb)	Tiny (<10kb)

Core

Paradigm

EmberComponent-based reactive framework

PreactVirtual DOM component library

Reusable component model

Ember✓

Preact✓

Rendering

Virtual DOM

Ember✓

Preact✓

Signals / fine-grained reactivity

Ember✓

Preact-

SSR support

Ember-

Preact✓

First-class TypeScript

Ember-

Preact-

State

Built-in state management

Ember✓

Preact✓

Ecosystem

Official router

Ember✓

Preact-

Performance

Runtime size

EmberSmall (10–40kb)

PreactTiny (<10kb)

What each one is

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

Ember

A JavaScript framework designed for long-term web application development with integrated routing, data management, testing infrastructure, and component architecture to enable teams to build and maintain rich user interfaces.

Independently observed

Preact

Leader

A minimal virtual DOM library that provides a React-compatible API with significantly reduced file size. Preact delivers performance-focused component development without the overhead of traditional frameworks.

Independently observed

Pricing

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

Ember

Open sourceFree tier

as of 2026-08-13verify ↗

Preact

Leader

Open source

as of 2026-08-13verify ↗

Platform & deployment

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

Platform and deployment support comparison
Supports	Ember	Preact
WebPlatforms	✓	✓

Platforms

Web

Ember✓

Preact✓

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