Our research-based matching system motivates people to donate to highly effective charities at givingmultiplier.org.

Giving Multiplier is a Harvard University research project that matches donations to any charity of your choice and promotes the world's most effective charities.

To make a donation that gets matched, go to http://givingmultiplier.org. To become a matching funder, go to http://givingmultiplier.org/matching. (If you donate on this page here, your donation will also go into our matching system.)

Giving Multiplier

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Giving Multiplier

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Join Justin to support Giving Multiplier

Join Justin to support Giving Multiplier

Giving Multiplier

Supporters

Become a supporter!

Become a supporter!

Turn this donation into a movement

Giving Multiplier

Giving Multiplier