Do good for the

Join 2 million people taking small steps for big impact.

Informed by experts, trusted by millions.

World-class experts


Registered nonprofit

See our latest impact report

Our impact adds up, one at a time.


Actions taken

343,865 km²

Ocean protected


Raised for projects


Species protected


Trees planted


Corals planted

Signatures delivered

Plastics petition delivered with over 100,000 signatures

Positive Progress

New Zealand officially calls for moratorium on deep-sea mining


Costa Rica expands marine protected area to be 27 times larger


60+ species protected by U.S. ban on deadly driftnets

Milestone achieved

One million mangrove trees restored in Mida Creek, Kenya

For everyone who wants to turn climate anxiety into climate action.

For anyone looking to take action for our ocean and our climate, Only One gives us incredible tools to make a difference and track our individual impact.

Lauren Russell
Actress, Ocean advocate
Los Angeles, United States

Only One extends inspiration into tangible, traceable action for all of us.

Carissa Cabrera
Marine biologist, TikTok creator
Kailua, Hawai'i

Intuitive, informative, elegant. Taking action to save our planet is ‘Only One’ click away and I can’t stop smiling!

Ümit Hardal
Explorer, Artist, Activist
Copenhagen, Denmark

Only One is awesome. It’s great to have an easy place to go, make change, and learn about what we can all do in our every day lives.

Kelsey Williamson
Oahu, Hawai'i