Millie is an MRV system engineered to support carbon dioxide removal projects operating in complex, real-world environments. Developed by Tradebox, the platform is designed to manage data integrity, traceability, and evidence generation across long-lived carbon removal pathways.

Millie is a systems-level MRV platform built to sit alongside physical operations and translate operational data into verification-ready evidence.

The platform supports:

• Continuous monitoring of carbon removal activities

• Structured data models aligned with MRV expectations

• Clear audit trails from source data to reported outcomes

• Long-term tracking of storage durability and permanence

Millie has been developed to operate in environments where data is incomplete, variable, and generated by physical processes rather than idealised digital systems.

Millie accurately monitors biochar performance and permanence in agricultural environments.

Biochar used in agriculture must do more than store carbon. Its performance and durability need to be understood over long timescales and across varied field conditions. Millie provides an MRV system designed to track how biochar behaves once it is applied to land, combining operational data, project records, and modelling to assess long term carbon storage. The platform helps translate complex biological and environmental data into structured, traceable evidence, supporting confidence in carbon removal claims. By focusing on real agricultural conditions rather than idealised assumptions, Millie enables more reliable monitoring of biochar permanence in working farming systems.

Designed for Carbon Removal in the Real World

Carbon dioxide removal projects operate across biology, chemistry, engineering, and land use. Millie is designed to reflect that reality.

The platform is particularly suited to pathways involving:

• Biochar and biomass-based carbon removal

• Biochar permanence modelling over extended timescales

• Carbon removal integrated with agricultural carbon systems

• Projects where MRV must evolve alongside operational scale-up

Rather than enforcing a single methodology, Millie provides a flexible MRV system that can adapt as standards, registries, and regulatory expectations develop.

From Data to Verification-Ready Evidence

Millie focuses on the hardest part of MRV: turning operational data into defensible evidence.

The platform is built to:

• Ingest data from diverse operational sources

• Maintain traceability across the full project lifecycle

• Preserve assumptions, calculations, and data lineage

• Support third-party review and independent verification

This approach helps project developers, buyers, and stakeholders understand not just what is being claimed, but how those claims are derived.