NewsIntroducing Rainbow Arc, our fully integrated certification platformArc is Rainbow’s new certification platform, enabling project developers to issue credits faster and more cheaply than with traditional solutions, while maintaining our commitment to quality and transparency.Date01 October 2025AuthorKimberly Joly
Rainbow was built to help project developers efficiently issue carbon credits that stand up to scrutiny and attract buyer demand. Until now, we’ve delivered on that promise with our application and quantification tools, which enable 20x faster certification times and are 3x more affordable than traditional certification solutions. Today, we're taking it even further. We’re officially introducing Rainbow Arc, our fully integrated certification platform. Arc simplifies the project developer workflow and streamlines the certification journey from the standard to the registry, with our same commitment and focus on quality and transparency. And our commitment to hands-on support still stands: our talented team of in-house science and certification experts are there to jump in and help at each step of the way.Rainbow Arc is a testament to how technology can meaningfully improve certification accuracy and efficiency. It pushes the industry toward higher standards of speed, trust, and rigor. And that’s the exact direction we need to go for companies to hit their decarbonization goals.Here’s how to get the most out of Arc.
Certify your carbon projectFocus on the essential qualitative aspects of your certification process. Access and answer all application questions through an intuitive dashboard, for a streamlined and intuitive certification process.
Perform carbon credit calculationsPerform your carbon credit calculations and estimates directly within Arc. We’ve integrated our quantification tool into Arc, allowing you to seamlessly validate and link your carbon credit outputs to your applications. Whether you're forecasting outcomes or preparing for audits, quantifications make it faster and easier to get certified, without ever leaving the Arc platform.
Centralize your proof documentsNo more scattered links or repetitive uploads. We’re introducing a centralized document library, letting you upload and manage proof documents directly within the platform. Attach files to multiple answers across applications and quantifications effortlessly, and share them when you need, all from one place.

Rainbow Arc is an all-in-one certification platform, designed to guide you from the standard to the registry, faster, simpler, and with more control than ever before.Learn more