Comparison

Bootstrap vs Bulma

On the evidence we track, Bootstrap leads this comparison with a composite score of 71/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

Bootstrap full profile →Bulma full profile →

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★Bootstrap71

Bulma48

Attribute comparison across 2 tools
Attribute	BootstrapLeader	Bulma
Vioscale score	71 / 100medium · 73%	48 / 100medium · 72%
Pricing
Free tierpricing.free_tier	✓	✓
Modelpricing.model	commercial	commercial
Price levelpricing.price_level	free	free
Transparentpricing.transparent	✓	-
Security
Scorecardsecurity.scorecard	7	2.8
Vulnerabilitiessecurity.vulnerabilities	Count: 12 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=bootstrap&per_page=100 · Last 12m: 0 · Max severity: MODERATE	Count: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=bulma&per_page=100 · Last 12m: 0
Reliability
Status pagereliability.status_page	-	✓
Adoption
Dependent reposadoption.dependent_repos	874,564	64,999
Github starsadoption.github_stars	174,650	50,059
Package downloads weeklyadoption.package_downloads_weekly	6,450,171	371,536
Activity
Commits last 30dactivity.commits_last_30d	14	0
Release
Cadence daysrelease.cadence_days	49	113
Historyrelease.history	20 items	20 items
License
Spdxlicense.spdx	MIT	MIT
Language
Primarylanguage.primary	MDX	CSS
Market
Availabilitymarket.availability	-	Available worldwide
Content
Faqcontent.faq	8 items	-

Score

Vioscale score

Bootstrap71 / 100medium · 73%

Bulma48 / 100medium · 72%

Pricing

Free tier

Bootstrap✓

Bulma✓

Model

Bootstrapcommercial

Bulmacommercial

Price level

Bootstrapfree

Bulmafree

Transparent

Bootstrap✓

Bulma–

Security

Scorecard

Bootstrap7

Bulma2.8

Vulnerabilities

BootstrapCount: 12 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=bootstrap&per_page=100 · Last 12m: 0 · Max severity: MODERATE

BulmaCount: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=bulma&per_page=100 · Last 12m: 0

Reliability

Status page

Bootstrap–

Bulma✓

Adoption

Dependent repos

Bootstrap874,564

Bulma64,999

Github stars

Bootstrap174,650

Bulma50,059

Package downloads weekly

Bootstrap6,450,171

Bulma371,536

Activity

Commits last 30d

Bootstrap14

Bulma0

Release

Cadence days

Bootstrap49

Bulma113

History

Bootstrap20 items

Bulma20 items

License

Spdx

BootstrapMIT

BulmaMIT

Language

Primary

BootstrapMDX

BulmaCSS

Market

Availability

Bootstrap–

BulmaAvailable worldwide

Content

Faq

Bootstrap8 items

Bulma–

Capabilities

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

Capability comparison for Frontend UI Frameworks
Capability	Bootstrap	Bulma
Core
Paradigm	CSS and JavaScript component library	Flexbox and Grid-based CSS 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	Small (10–40kb)	Small (10–40kb)

Core

Paradigm

BootstrapCSS and JavaScript component library

BulmaFlexbox and Grid-based CSS component framework

Reusable component model

Bootstrap✓

Bulma✓

Rendering

Virtual DOM

Bootstrap-

Bulma-

Signals / fine-grained reactivity

Bootstrap-

Bulma-

SSR support

Bootstrap-

Bulma-

First-class TypeScript

Bootstrap-

Bulma-

State

Built-in state management

Bootstrap-

Bulma-

Ecosystem

Official router

Bootstrap-

Bulma-

Performance

Runtime size

BootstrapSmall (10–40kb)

BulmaSmall (10–40kb)

What each one is

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

Bootstrap

Leader

Bootstrap is a front-end framework and library that provides pre-built HTML components, CSS styling utilities, and JavaScript plugins for constructing modern web applications. It simplifies responsive design with a grid system and standardized UI components.

Independently observed

Bulma

A free, open-source CSS library providing pre-built components and utilities for constructing responsive web layouts. It uses Flexbox and CSS Grid as its foundation with CSS Variables for customization, requiring only a single CSS file and no JavaScript to get started.

Independently observed

Pricing

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

Bootstrap

Leader

FreeFree tier

Free and open source

as of 2026-08-14verify ↗

Bulma

Open sourceFree tier

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	Bootstrap	Bulma
WebPlatforms	✓	✓
Cloud / SaaSDeployment	✓	✓
Self-hostedDeployment	✗	✓

Platforms

Web

Bootstrap✓

Bulma✓

Deployment

Cloud / SaaS

Bootstrap✓

Bulma✓

Self-hosted

Bootstrap✗

Bulma✓

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