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Bootstrap

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Laying out a responsive web page with ready-made components is the job of Bootstrap, an open-source front-end framework. Web developers use its grid, Sass customization, JavaScript plugins and components such as modals, navbars and cards. The project began at Twitter and was first released to the public in August 2011.

Facts at a glance

FactValueSource
Launched2011. Originally released on 19 Aug 2011 after starting at Twitter in 2010getbootstrap.com/docs/5.3/about/overview, checked 5 Nov 2026
Free planFree: a free plan existsgetbootstrap.com/docs/5.3/about/license, checked 5 Nov 2026
PlatformsWebgetbootstrap.com, checked 5 Nov 2026

Pricing & plans

Model

Free

Free plan available

Price tiers

PlanPer monthUsage, as the vendor states it
BootstrapFreeOpen-source framework that may be downloaded and used freely, including for commercial purposes

Prices are the vendor's list prices in USD.

  • License and copyright notice must stay in the CSS and JavaScript files

  • Provided without warranty

  • Bootstrap marks cannot imply endorsement of a derived work

Source: getbootstrap.com/docs/5.3/about/license, checked 5 Nov 2026

Features & platforms

  • Responsive grid, containers and breakpoints

  • Components such as modals, navbars, cards and carousels

  • Form controls with validation

  • Sass customization and color modes

  • JavaScript plugins for interactive components

  • Bootstrap Icons library

  • Web

Sources: getbootstrap.com/docs/5.3/getting-started/introduction, getbootstrap.com, checked 5 Nov 2026

Alternatives

  • Tailwind CSS

    Utility-first framework with classes such as flex and pt-4 that are composed directly in markup to build any design.

    tailwindcss.com

  • Bulma

    Described as a free, open-source CSS framework based on Flexbox, with CSS variables and a dark mode.

    bulma.io

  • Foundation

    Foundation for Sites supplies HTML, CSS and JavaScript for prototyping content-focused websites, with a customizable grid.

    get.foundation

Sources: tailwindcss.com, bulma.io, get.foundation

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Sources and dates

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