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Offstream

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Vanta for carbon compliance

Summer 2024Founded 20237 people

About

Offstream is Vanta for carbon compliance. Today, every new infrastructure project, from data centers to biomass power plants has a complicated mess of local, state, federal, and private sector standards that they must understand and comply with to make their projects profitable. Offstream solves this by using LLMs to parse regulations, generate technical reports for customers, and manage 100,000+ operational data points on project’s lifecycles. We cut the time customers spend on compliance by 90% and at 1/5th of the cost of alternatives.

From their website

www.useoffstream.com β†—
SaaSSubscription

Offstream provides an end-to-end platform to design, certify, monitor, and optimize carbon removal projects for compliance and revenue. It combines dynamic life cycle assessment, streamlined certification workflows, and an integrated dMRV to accelerate verified credits across multiple standards.

Offstream offers: (1) Design, Assess, and Optimize with dynamic LCA and rapid scenario modeling to forecast credit yields and revenue, compare standards (GRETT, 45Q, 45Z, ISO 14040/14044), and design projects for maximum impact; (2) Certify Faster with project data handling, registry documentation, expert reviews, and seamless registry submissions to accelerate time-to-verified credits; (3) Monitor, Measure, and Verify through an integrated dMRV to track carbon accounting, generate audit-ready registry reports, and keep compliance up-to-date automatically; (4) An end-to-end, registry-aligned platform that ties data from operations to reporting, with automation and expert support for Biochar, BiCRS, BECCS, DAC, and other emerging pathways.

Who it’s for: Carbon removal developers and operators (biochar, BECCS, DAC, and other emerging carbon removal pathways) requiring fast, compliant certification and ongoing reporting.

Features
  • Dynamic Life Cycle Assessment with rapid scenario modeling
  • Forecast carbon credit yields and revenue
  • Standards mapping and comparison (GRETT, 45Q, 45Z, ISO 14040/14044)
  • End-to-end registry submission and expert reviews
  • Integrated dMRV for audit-ready reporting
  • Automated compliance tracking across standards
  • Documentation builder and registry-ready reports

Customer testimonials and references, mention of trusted by leading developers, and 2025 terms indicate ongoing traction and platform maturity

Founders Β· 2

Varsha Ramesh Walsh
Varsha Ramesh WalshFounder

CEO and co-founder at Offstream. HBS '23. Previously a strategy lead at Indigo Ag where I launched a traceable cotton business and got the business to $50M GMV bookings in a year. At Indigo, I experienced the pain point we are now solving at Offstream. We hired 80 people and spent $50M to just get carbon compliant.

Zach Janicki
Zach JanickiFounder

CTO and cofounder of Offstream. CS from Notre Dame. Previously 1st engineering hire at Repool (YC S21) building hedge fund software, and early engineer at Pathpoint building insurance brokerage software. I've spent my career turning paperwork into software

Launch

Launched on Y Combinator Β· Jul 2024
View launch post β†—

Less time on paperwork, more time scaling decarbonization

Offstream automates carbon compliance for project developers, providing a one-stop platform to set up and generate life cycle assessments and related compliance documentation, reducing time and cost to meet regulatory and voluntary market standards for decarbonization projects.

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