Bootstrap
A widely-used framework combining HTML, CSS, and JavaScript for mobile-first responsive web development
- Vendor
- Getbootstrap
- Also known as
- bootstrap
What is Bootstrap?
Bootstrap provides ready-to-use web components and styling patterns built with accessibility in mind, making it easier to build responsive websites that work across all devices.
Bootstrap pricing
We don't have Bootstrap's full plan breakdown yet (its pricing page resisted automated reading). Here's what we could confirm. Always check live pricing for exact numbers.
Completely free and open source
What Bootstrap does
The capabilities that matter for frontend ui frameworks, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.
- Paradigm
- CSS and JavaScript component library
- Reusable component model
- ✓
- Virtual DOM
- -
- Signals / fine-grained reactivity
- -
- SSR support
- -
- First-class TypeScript
- -
- Built-in state management
- -
- Official router
- -
- Runtime size
- Small (10–40kb)
Platform & deployment
Independently observed- Web
- Cloud / SaaS
- Self-hosted
Security & compliance
Known vulnerabilities: 12 (0 in the last 12 months), max severity MODERATE sourcea count reflects scale & disclosure, not quality
Bootstrap FAQ
Common questions about Bootstrap, answered from independent, dated evidence.
What is Bootstrap and who should use it?
Bootstrap is an open-source HTML, CSS, and JavaScript framework for building responsive web applications with a mobile-first approach. It provides pre-built components, utilities, and a grid system that help developers create websites and web applications more efficiently without building from scratch.
Source: https://getbootstrap.com
How much does Bootstrap cost?
Bootstrap is open-source and free to use. There are no licensing fees, subscription costs, or paid tiers required—anyone can download and use it in any project.
Source: https://getbootstrap.com
What platforms does Bootstrap support?
Bootstrap is a web-based framework designed for building responsive web projects. It runs in any modern web browser and can be deployed across different hosting and infrastructure models.
Source: https://getbootstrap.com
What deployment options are available with Bootstrap?
Bootstrap supports both cloud deployment and self-hosted options, giving teams flexibility to choose the infrastructure model that fits their needs. Developers can deploy Bootstrap-based projects to the hosting platform of their choice.
Source: https://getbootstrap.com
Does Bootstrap include ready-to-use components?
Yes, Bootstrap provides a library of pre-built HTML, CSS, and JavaScript components along with a responsive grid system. Developers can use and customize these components as building blocks for their interfaces.
Source: https://getbootstrap.com
Can I customize Bootstrap's default styling?
Bootstrap is built with Sass and supports customization through Sass variables and functions. This allows developers to adjust colors, spacing, and other design properties to match their brand requirements while keeping the component structure intact.
Source: https://getbootstrap.com
Is Bootstrap built for mobile-first development?
Yes, Bootstrap is designed with a mobile-first philosophy, prioritizing mobile user experiences and progressively enhancing the interface for larger screens. This approach ensures projects work reliably across different device sizes and screen resolutions.
Source: https://getbootstrap.com
What interactive functionality does Bootstrap provide?
Bootstrap includes pre-built JavaScript plugins that add interactivity to components, such as navigation dropdowns, modals, carousels, and tooltips. These plugins extend the basic HTML and CSS components with common interactive behaviors developers can use out of the box.
Source: https://getbootstrap.com
Bootstrap alternatives
Other frontend ui frameworks we track, ranked by the same independent score.
- Vue.jsmedium · 71%
- PreactA minimalist UI framework that provides component-based development without the performance cost of larger alternatives.medium · 72%
- AngularA web framework for building performant, scalable applicationsmedium · 59%
- Vue.jsJavaScript framework for building interactive web interfaceshigh · 77%
- SvelteA compiler-based web framework for building responsive componentsmedium · 72%
- ReactBuild interactive user interfaces for web and native platforms using reusable componentsmedium · 73%
Compare Bootstrap
Side by side against other frontend ui frameworks, attribute by attribute, with a source on every value.
The vioscaleAI score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for Bootstrap, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Package downloads | 88 | 0.17 | 15.3 | ✓ |
| Dependent projects | 99 | 0.08 | 7.9 | ✓ |
| Development activity | 42 | 0.12 | 5.0 | ✓ |
| Release cadence | 73 | 0.07 | 4.9 | ✓ |
| Security score | 72 | 0.05 | 3.8 | ✓ |
| Stars | 99 | 0.03 | 3.3 | ✓ |
| Capabilities | 29 | 0.08 | 2.4 | ✓ |
| Integrations | 0 | 0.05 | 0.0 | - |
| Security posture | 0 | 0.09 | 0.0 | - |
| Developer Q&A activity | 0 | 0.08 | 0.0 | - |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.
Activity
| Attribute | Value | Evidence |
|---|---|---|
| Commits last 30d | 20 | mediumsource · 2026-09-10 · 65% |
Adoption
Content
| Attribute | Value | Evidence |
|---|---|---|
| Faq | 8 items | highsource · 2026-07-31 · 91% |
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | Paradigm: CSS and JavaScript component library · Bundle size: small · Component model: Yes | mediumsource · 2026-09-14 · 60% |
Language
| Attribute | Value | Evidence |
|---|---|---|
| Primary | MDX | highsource · 2026-09-10 · 90% |
License
| Attribute | Value | Evidence |
|---|---|---|
| Spdx | MIT | highsource · 2026-09-10 · 99% |
Pricing
Release
Security
Is Bootstrap the right choice for you?
Tell us the job, the constraints and what you weigh most, and we will rank Bootstrap against the rest of the frontend ui frameworks we index, using the same dated evidence weighted your way.
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