Wren is a San Francisco-based SaaS platform enabling individuals to offset their carbon footprint by funding climate projects globally.
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Wren is a carbon offset platform operating in a structurally contested market. Its own operational footprint is negligible, but it publishes no emissions data. Core weakness: zero formal disclosure of own operations, no SBTi commitment, and dependence on voluntary carbon credits with documented sector-wide integrity issues.
Wren Climate, PBC scores 54/100 (Making progress) on SINK's independent climate assessment, scored from public data only. Fees pay for the review, never the result. Last verified July 2026.
That places Wren Climate, PBC joint 64th of 847 companies scored, and 14th of 76 in SaaS / Digital Services.
Where Wren Climate, PBC sits among saas / digital services peers.
Among the 76 major saas / digital services brands we've scored, Wren Climate, PBC sits 14th of 76.
Its three lowest-scoring questions, and what the evidence didn't show.
Wren publishes no Scope 1, 2, or 3 emissions data, sustainability report, or BEGES filing.
No Scope 3 data published.
No multi-year emissions data exists.
A score changes when the evidence does. We use new published evidence at the next rescore. Evidence that isn't public can count through an evidence review.
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Get in touch →Strongest on Transparency & Accountability and Controversies & Red Flags (7/10, 7/10). Weakest on Carbon Footprint — Operations and Carbon Footprint — Supply Chain (3/10, 3/10).
The 3 companies in the sector scoring nearest above Wren Climate, PBC.
EA discloses Scope 1 & 2 emissions with GHG Protocol alignment and tracks a 19% absolute reduction over two years, but Scope 3 targets lack validation and rely on offsets.
See the breakdown →Library of Things has negligible operational emissions and structurally reduces consumption through product sharing.
See the breakdown →Atlassian's absolute emissions rose 129% since FY2019, driven by Scope 3 cloud and travel growth.
See the breakdown →The formula and all 9 sources.
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × Scale9 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
“Servers ($3,071): it costs some money to host our site”
“Wren subscribers made an incredible impact from June 2024-2025, contributing $4.9M”
“In year five, Wren subscribers have contributed $5.6M to fight climate change”
“We evaluate projects against 250+ indicators to ensure projects meet our standards”
“Wren is a registered PBC in the United States with a legally-binding charter”
“Wren's success as a business is measured by impact, not profit”
“Servers, software, and web expenses ($106,000)”
If you believe a source has been misread or a newer version exists, submit a challenge.
Wren is a San Francisco-based SaaS platform enabling individuals to offset their carbon footprint by funding climate projects globally. Founded in 2019, it operates as a public benefit corporation with approximately 10–15 employees. The company curates and finances carbon removal and avoidance projects, primarily in reforestation, deforestation prevention, and soil carbon restoration.
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