Join Hannah on Wren!

Join Wren and your first month is free.

Hannah is inviting you to Wren! Join them by calculating and offsetting your carbon footprint.

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Lenia offset their carbon footprint! 12 minutes ago

Wren is the platform for climate action.

Offset and remove carbon, reduce your footprint, track impact, and much more.

Discover your carbon footprint.

Use our intuitive carbon calculator to find out how much CO2e your lifestyle emits.

Fund the most impactful climate solutions.

Wren evaluates hundreds of projects each year and picks only the best.

Track your impact and stay in the loop.

Wren sends monthly project updates so you know what your funding accomplished.

Wren helps individuals, businesses, and philanthropists take action.

For individuals

Easily calculate, reduce, and offset your carbon footprint.

For business

Fund certified carbon removal, share your climate impact with your audience, and more.

For philanthropists

Craft a climate giving strategy and donate via a donor-advised fund.

Wren asks a series of questions to determine how much carbon you emit.— New York Times

Wren’s approach delivers world-class results.

The Wren Difference

Wren searches the globe for solutions with the most potential...

Selecting projects that meet Wren’s strict criteria...

No double counting

Every carbon credit purchased by Wren is logged in a public ledger.

Measurable results

The quantity of impact is based on peer-reviewed science.

Additionality

If a project is profitable on its own, it's not eligible for Wren.

Lasting impact

Projects must keep carbon out of the atmosphere for 100+ years.

Frequently asked questions

For individuals

How does Wren's business model work?

What happens once I subscribe?

Is every payment on Wren tax-deductible?

No. Our primary Wren Classic and Wren Trailblazer offsetting portfolios are not tax-deductible. However, the Wren Climate Collective is a fiscally-sponsored 501(c)(3) non-profit with donations tax-deductible in the United States.

How much does it cost to offset my carbon footprint?

What else can I do to help end the climate crisis?

For business

Can my business pay for just the parts of Wren that we need?

Yes. Wren is designed to specifically fill the gaps in your existing climate plan. If you only need one of the services we provide, you only need to pay for that service. If you need more, you can always expand your plan.

Help solve the climate crisis with Hannah. Start your climate journey today.

For individuals

Easily calculate, reduce, and offset your carbon footprint.

For business

Fund certified carbon removal, share your climate impact with your audience, and more.

For philanthropists

Craft a climate giving strategy and donate via a donor-advised fund.