We started CarbonPortal because we watched companies buy worthless offsets and call it climate action. Every credit on our platform is backed by real satellite data — not a promise.
The voluntary carbon market is worth billions today but lacks integrity. Projects are audited once, by paper, years before credits are sold. We fix that by replacing paper audits with satellite AI running every 90 days.
Every piece of data behind a credit — the satellite heatmap, the canopy height measurements, the carbon formula, the audit timestamp — is visible to any buyer before they purchase. We have no proprietary black boxes.
We make money only when NGOs make money. There are no upfront listing fees, no audit charges, and no subscription required to get started. We take a small percentage of credit sales because our success should be tied to theirs.
Our carbon estimates use IPCC Tier 1 biomass formulas, not proprietary multipliers. We publish our methodology openly. When a better scientific model is available, we adopt it — even if it means re-issuing fewer credits.
Once a credit is retired, it is gone from supply forever. We do not recycle credits, re-sell retired credits, or allow reversals after purchase. The blockchain-style serial number audit trail is permanent and publicly inspectable.
“UCA is doing what the voluntary carbon market has always needed — replacing trust with proof.”
“The satellite audit approach could finally give institutional buyers the confidence they need to invest at scale in forest offsets.”
“An ambitious technical approach to a long-standing credibility problem. The 90-day re-audit cycle is particularly noteworthy.”
We publish the complete carbon calculation methodology used on this platform. The formula, the IPCC reference, the model version, and the uncertainty bounds are all disclosed on every project audit page.
AGB = 0.066 × H2.59
Where: AGB = above-ground biomass (t/ha), H = mean canopy height (m) from DINOv3 CHM v2
Total CO₂e = AGB × 0.47 × 3.67 × area(ha)
Carbon fraction: 0.47 (IPCC default). CO₂ molecular weight ratio: 3.67. Source: IPCC 2006 Guidelines Vol. 4, Chapter 4.