The Boost C++ Libraries are open source, peer-reviewed, portable and free

Created by experts to be reliable, skillfully-designed, and well-tested.

Boost Mission

development of high quality, expert reviewed, legally unencumbered, open-source libraries,
inspiring standard enhancements, and
advancing and disseminating software development best practices.

It does this by fostering community engagement, nurturing leaders, providing necessary financial/legal support, and making directional decisions in the event of Boost community deadlock.

Equally important to our mission is the guidance provided by our shared values. These are transparency, inclusivity, consensus-building, federated authorship, and community-driven leadership.

10M+

Total Downloads

165+

Individual Libraries

Why Use Boost? In a word, Productivity. Use of high-quality libraries like Boost speeds initial development, results in fewer bugs, reduces reinvention-of-the-wheel, and cuts long-term maintenance costs. And since Boost libraries tend to become de facto or de jure standards, many programmers are already familiar with them.

schedule of events

All Events

October 2025

Oct. 22, 2025: Boost 1.90.0 closed for new libraries and breaking changes
Release branch is closed for new libraries and breaking changes to existing libraries. Still open for bug fixes and other routine changes to all libraries without release manager review.
Oct. 29, 2025: Boost 1.90.0 closed for major changes
Release closed for major code changes. Still open for serious problem fixes and docs changes without release manager review.

November 2025

Nov. 5, 2025: Boost 1.90.0 closed for beta
Release closed for all changes
Nov. 12, 2025: Boost 1.90.0 beta
Beta posted for download.
Nov. 13, 2025: Boost 1.90.0 open for bug fixes
Release open for bug fixes and documentation updates. Other changes by permission of a release manager.

December 2025

Dec. 3, 2025: Boost 1.90.0 closed
Release closed for all changes
Dec. 10, 2025: Boost 1.90.0 release
Release posted for download.

library spotlight

All Libraries

Meta State Machine

A very high-performance library for expressive UML2 finite state machines.

Christophe Henry

Author

Boost.SQLite proposal from Klemens Morgenstern has been rejected. The author is encouraged to resubmit after addressing the issues identified in the review. Thanks to Review Manager Mohammad Nejati.

Repo: https://github.com/klemens-morgenstern/sqlite
Docs: https://klemens.dev/sqlite
Review results: lists.boost.org/arch....HCBTPPBGM6WW54PBFNR/