Open Arsenal

Travel Smarter. Travel Greener.

GreenMile is an open-source CO₂e (carbon dioxide equivalent) calculator designed to bring clarity and accountability to travel-related emissions. Built with a strong focus on Scope 3 Category 6 (business travel), it helps individuals and organizations understand the environmental impact of their transportation choices across flights, trains, cars, buses, and rideshares. By turning travel data into measurable carbon outputs, GreenMile makes it easier to move from abstract sustainability goals to concrete, trackable actions.

At its core, GreenMile provides a flexible and transparent emissions calculation engine. Users can input trip distances or itineraries and receive accurate CO₂e estimates based on configurable emission factors. The system supports multi-trip aggregation, enabling tracking at the individual, team, or company level. Its design emphasizes transparency, allowing users to see exactly how each calculation is derived, which is critical for both trust and auditability in sustainability reporting.

Beyond basic calculations, GreenMile introduces powerful analytics and decision-support features. Interactive dashboards visualize emissions over time, highlight major sources of impact, and break down data by transport mode. The platform also includes intelligent optimization suggestions, helping users identify lower-carbon alternatives—such as switching from flights to rail—and estimate potential emissions reductions. Scenario modeling allows organizations to test “what-if” strategies, making GreenMile a practical tool for planning and policy decisions.

For organizations, GreenMile extends into a full Scope 3 reporting solution. It supports employee-level tracking, departmental analysis, and exportable reports aligned with ESG and GHG Protocol frameworks. The built-in carbon offset layer further enhances its capabilities by translating emissions into real-world impact equivalents and tracking progress toward net-zero goals. With an open API, plugin architecture, and AGPL-3.0+ licensing, GreenMile is built to grow as a collaborative, community-driven platform for climate-conscious travel intelligence.