What it sells
Wren is a monthly subscription to offset your carbon footprint.
Business model breakdown
Buyer: who owns the budget?
Individuals (monthly subscription), businesses and philanthropists via separate offerings.
Workflow: what inputs become what output?
Calculate carbon footprint, subscribe to fund vetted climate projects, receive monthly project updates; businesses get custom portfolios and API integrations.
Economics: what it saves and how it charges
Public benefit corporation selling subscriptions that fund carbon removal/avoidance projects; claims $20M raised from supporters and 880,000 tonnes CO2e.
Distribution: how it reaches customers
Self-serve web signup with calculator, 1% for the Planet certification, business API and DAF giving for philanthropists.
Funding history and coverage
| Round date | Stage | Amount | Investors | Source |
|---|---|---|---|---|
| — | Y Combinator Summer 2019 | — | Y Combinator | ycombinator.com |
Profiles summarize public reporting and company websites. Business-model notes are MaxBC's reading of that material, not confirmed facts; unknowns are left blank rather than guessed. Updated 2026-10-12.