Clap

COLLECTIVE

Fast, modern CLI framework for Rust

This is Clap's page Clap

Contribute

All ways to contribute

Budget

Connect

Updates

About

Rainy Day Fund

$200

Estimated Annual Budget

$5,593

Today's Balance

$13,743.42

Contribute

Become a financial contributor.

Financial Contributions

Goal

Backer

You love us and would like to see us thrive. You will be listed in our README on Github.

$15 USD of $60 USD / month raised (25%)

Starts at

$5 USD / month

Latest activity by

+ 4

Goal

Help development by funding some minor issues every month. (+ Backer) Read more

$0.00 USD of $200 USD / month raised (0%)

Starts at

$25 USD / month

Latest activity by

Membership

Gold

Contribute to our roadmap. You can assign an issue as high priority (at most 2 at any time). (+ Backer)

Starts at

$100 USD / month

Latest activity by

Membership

Silver

Contribute to our roadmap. You can assign an issue as high priority (at most 1 at any time). (+ Backer).

Starts at

$50 USD / month

Latest activity by

Custom contribution

Donation

Make a custom one-time or recurring contribution.

Latest activity by

+ 32

Top financial contributors

Individuals

Phil Hansch

$500 USD since Jan 2022

Will Buckner

$430 USD since Mar 2022

Incognito

$265 USD since Nov 2021

repi

$245 USD since Aug 2020

$190 USD since Mar 2023

Fiberplane

$140 USD since Jun 2022

Christoph Grabo

$85 USD since Dec 2023

Juan Campa

$75 USD since Jun 2021

Xidorn Quan

$72 USD since Aug 2020

pic16f877ccs

$50 USD since Oct 2023

Organizations

Embark

$4,300 USD since Aug 2020

GitHub Sponsors

$4,289.14 USD since Apr 2024

THANKS.DEV

$3,012.92 USD since Nov 2022

Sentry

$748 USD since Oct 2021

Databento

$425 USD since Jan 2026

Materialize

$300 USD since May 2023

Stencila

$155 USD since Sep 2023

Evrone

$100 USD since Jan 2022

StackAid

$5.14 USD since Oct 2022

Clap is all of us

Our contributors 39

Thank you for supporting Clap.

Pavan Kumar S...

Core Contributor

Kevin Knapp

Admin

Ed Page

Admin

Embark

Gold

$4,300 USD

GitHub Sponsors

$4,289 USD

THANKS.DEV

$3,013 USD

Rust Fund

$1,006 USD

Sentry

$748 USD

Phil Hansch

$500 USD

Will Buckner

Bronze

$430 USD

Databento

Gold

$425 USD

Materialize

Bronze

$300 USD

Budget

Transparent and open finances.

GitHub Sponsors Contributions

Credit from GitHub Sponsors to Clap • April 28, 2026

+$215.00USD

Completed

Added funds #947271

Financial contribution to Clap

Credit from Rust Fund to Clap • April 15, 2026

+$51.22USD

Completed

Balance transfer

Monthly financial contribution to Clap (Gold)

Credit from Databento to Clap • April 2, 2026

+$100.00USD

Completed

Contribution #918124

Today’s balance

$13,743.42 USD

Total raised

$14,904.70 USD

Total disbursed

$1,161.28 USD

Estimated annual budget

$5,592.75 USD

Connect

Let’s get the ball rolling!

News from Clap

Updates on our activities and progress.

Faster development with tiny bounties

When we started Open Source Collective for Clap, we (the maintainers) had a discussion on what to do with the money. We have some maintenance expenses @kbknapp is currently paying out of his pocket every ye...

Published on August 14, 2020 by Pavan Kumar Sunkara

Clap on OpenCollective

Your favourite CLI framework is now on OpenCollective.We are opening this to offset some maintenance costs and also fund some minor issues in the future in order to engage more outside contributors.We would also love to send some free sw...

Published on May 27, 2020 by Pavan Kumar Sunkara

About

Clap is used to parse and validate the string of command line arguments provided by a user at runtime. You provide the list of valid possibilities, and clap handles the rest. This means you focus on your applications functionality, and less on the parsing and validating of arguments.

Clap provides many things 'for free' (with no configuration) including the traditional version and help switches (or flags) along with associated messages. If you are using subcommands, clap will also auto-generate a help subcommand and separate associated help messages.

Once clap parses the user provided string of arguments, it returns the matches along with any applicable values. If the user made an error or typo, it informs them with a friendly message and exits gracefully (or returns a Result type and allows you to perform any clean up prior to exit). Because of this, you can make reasonable assumptions in your code about the validity of the arguments prior to your applications main execution.

Our team

Pavan Kumar S...

Core Contributor

Kevin Knapp

Admin

Ed Page

Admin