Carbon Marketplace

Lorien

16 weeks
Duration
5 engineers
Team
Ethereum / Polygon
Platform
Live
Status
5+
Credit Standards
3
Registry Integrations
100%
On-chain Provenance
<2s
Trade Settlement

A Few Words About The Client

Lorien is a carbon credit marketplace that connects buyers and sellers of verified carbon offsets using blockchain for transparency and traceability. Block Intelligence built the platform to support issuance, trading, and retirement of carbon credits with clear provenance and reporting.

The client needed a marketplace that could handle multiple credit types and standards while providing immutable records and avoiding double-counting. They also required integration with registries and reporting frameworks used by enterprises and regulators.

Industry

Carbon Marketplace

Project

Lorien

Duration

16 weeks

Team

5 engineers

Platform

Ethereum / Polygon

Status

Live

Lorien

Project Requirements

  • Tokenization and on-chain representation of carbon credits with clear metadata.
  • Marketplace for buying, selling, and retiring credits with settlement and custody.
  • Registry and standard integrations (e.g. Verra, Gold Standard) where applicable.
  • Reporting and dashboards for corporates and auditors.
  • Transparent provenance and audit trail for every credit.

Our Solution & Results

We implemented a full marketplace: smart contracts for credit representation and transfers, a backend for registry sync and business logic, and a web app for discovery, trading, and retirement. We added reporting exports and optional integration points for external registries.

Lorien went live with real credits and has processed a growing volume of trades. Buyers and sellers benefit from transparent pricing and verifiable retirement. The client has expanded credit types and geographies using the same platform.

Business Impact & Value Delivered

Measurable outcomes Block Intelligence delivered for Lorien - before vs after launch.

Credit traceability

Partial (PDF) 100% on-chain

Trade settlement

T+3 days <2 seconds

Double-counting risk

Manual audit Eliminated

Value delivered

  • Immutable on-chain provenance removed double-counting concerns for ESG buyers.
  • Enterprise reporting exports cut audit preparation from weeks to days.
  • Multi-standard support opened access to corporate buyers across geographies.

Performance & Data Analysis

Carbon marketplace performance data from registry sync, trade settlement, and retirement reporting over two quarters.

12,800
Credits tokenized (tCO₂e)
+240% YoY
$2.1M
Marketplace GMV
Across 5 standards
3
Registry integrations
Verra, Gold Standard, Puro
98%
Retirement report accuracy
Auditor-validated
MetricBeforeAfterChange
Settlement time72 hrs<2 sec−99.9%
Audit prep time3 weeks2 days−90%
Buyer onboarding10 days1 day−90%
Provenance disputes4 / quarter0−100%

Delivery Timeline

1
Discovery
Wk 1–2
2
Smart Contracts
Wk 3–7
3
Marketplace Build
Wk 8–14
4
Audit & Launch
Wk 15–16

The on-chain provenance feature eliminated double-counting concerns entirely. Our enterprise clients now trust the reports we generate from Lorien for their ESG disclosures.

- Lorien - Co-founder

Technology Stack

Front End

01React

Back End

01Solidity 02Node.js 03TypeScript 04Smart contracts (Solidity) 05backend (Node.js/TypeScript) 06PostgreSQL 07React front end 08cloud deployment with secure key management.

Infrastructure

01PostgreSQL 02Cloud deployment

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