Multiply your impact

Give to both your favorite Jewish charity and a super-effective charity recommended by experts. We'll add to your donations.

About Tzedakah Multiplier

As Jews, we want to give tzedakah to support our community and the wonderful Jewish charities that help it thrive.
At the same time, we also want to have the greatest impact we can, giving to those most in need regardless of where they come from.
Tzedakah Multiplier allows us to have the best of both worlds, whilst adding more on top of our donations.
"Someone who saves a single life,
it is as if they saved the entire world."
~ Talmud

How it works

Select your favorite Jewish charity

This can be any charity that you care about.

Select a super-effective charity

You can choose from our list of expert recommendations.

Divide your donation between the two

At least 10% has to go to a super-effective charity.

We'll add 9% to 90% on top of your donations:

our crowdsourced matching pool adds a proportion on top, so the total is always greater than what you donate. Learn more here.

Why donate with Tzedakah Multiplier?


Our goal is to make charitable giving as effective as possible. We support charities that experts have identified as super effective.


We'll add a small donation on top of yours from our crowdsourced matching pool. The more you give to the super-effective charity, the higher the rate.


Your donations are processed by our trusted partner — a non-profit hub for charitable giving. Your data privacy is ensured.


As a project based at Harvard University, Tzedakah Multiplier has been reviewed by the Harvard internal review board and data safety team.

Don't want to make a donation right now?

If you prefer making your donations at the end of the year, we can remind you later about Tzedakah Multiplier.

Media coverage

  • "For Giving Tuesday, this Harvard-designed donation tool helps you maximize your impact"
    - Best New Ideas in Money

  • Giving Multiplier is an award winner of the Reimagine Charitable Giving Challenge that honors "promising concepts in the digital giving space"

  • "The next time you’re ready to give, make two donations: one to a charity that speaks to your heart and one to a charity that’s expert-certified for extraordinary impact."

  • "I appreciate Giving Multipliers's incrementalist approach to helping people make more effective charitable giving decisions."

  • "If even just a quarter of all donors applied this strategy, millions of lives would be saved and improved - without donors having to forsake the charities closest to their hearts."

  • "Giving Multiplier, an online platform that eases — and sweetens — donations to global health and development charities"

  • "The researchers were able to effect real-world changes in donors’ behavior by offering them the chance to give with their heads as well as their hearts."

  • Why Giving Money to Others Makes us Happier by The Happiness Lab with Dr. Laurie Santos

  • Joshua Greene on Morality, Psychology, and Trolley Problems by Sean Carroll's Mindscape Podcast

  • The Power of Altruism: How Effective Altruism is a Giving Multiplier by Passion Struck Podcast with John R. Miles

  • Moral Psychology & Pragmatism by The Nature & Nurture Podcast

  • Cooperation, Charity, and Effective Giving by The Stanford Psychology Podcast

  • Moral Tribes: Bridging the gap between "us" and "them" by Giving What We Can

  • Morality Meets World by On Wisdom

  • Under the Radar with Callie Crossley

  • Clearer Thinking with Spencer Greenberg

Websites we recommend

About Tzedakah Multiplier

Tzedakah Multiplier is a project of Effective Altruism for Jews, in partnership with Giving Multiplier. EA for Jews is a group of Jews of all different backgrounds excited about doing the most good we can. If you'd like to learn more, visit