Canva co-founder Cameron Adams and his wife Lisa Miller join the promise of the world's wealthiest philanthropists to hand over most of their wealth to charities.

The couple announced Tuesday that they joined the donation commitment, a very wealthy mechanism to donate to a series of charities founded by Warren Buffett, Microsoft co-founder Bill Gates and his then-wife Melinda French Gates.

Adams - According to the Australian Financial Review, an estimated value of about $6.81 billion - Miller has pledged to use most of its funds to address environmental issues.

"Nature can nourish us, sustain us, inspire us, and shape our lives. But today, many ecosystems that support our lives are destroyed - our future depends on how we choose to save them."

“Lisa and I believe that a responsibility full of luck is a huge responsibility. We recognize that the opportunities we have in our lives give us the ability to give generously and act purposefully.”

According to its website, more than 240 wealthiest philanthropists from 30 countries have joined the donation commitment since 2010, with only a few Australians.

Canva's other co-founders Melanie Perkins and Cliff Obrecht got married in 2021 and signed a vow that same year that they wanted to do "the best we can do" with their online graphic design software platform, which reportedly reportedly reportedly was worth $49 billion in late 2024.

AFR reports that Adams will soon have more $7 billion in wealth, mainly in Canva Equity.

He and Miller have previously promised to donate “most” of their wealth through nature-centered investment firm The Wedgetail Foundation, with Miller being the founder and CEO.

Adams said they gave them confidence through their work with wedgetail that environmental issues are “worth fighting for” and that they are placed in making “unique contributions.”

“Through the commitment to donation, we point most of our wealth to this point, because inaction on a dying planet is unacceptable,” he said.

“We must not only stop the decline of nature, but we must also start to recover.”

According to its website, give people who promise to "focus on" at least $100 million in net worth or who will become billionaires, if not charity.

Australian poker machine giant Len Ainsworth promised in 2017.

“As a private person, I prefer to promote my charity to the greatest extent, but at the same time realize that setting a positive role model is the best role model to encourage others to give back,” he said at the time.