Startup Stories: Turning the ESG Maze into Simple Compliance

Founder: Vivian Cai ’25

Venture: Using an AI engine, Sustentra turns raw sustainability data into assurance-grade reports, detects anomalies, and validates evidence so firms can “comply once for all” with global regulations.

What was the moment when you had the idea for this startup?

The idea for Sustentra came during my experience working in Paris at an impact asset management firm. We were among the first teams responsible for complying with complex new European ESG regulations like Sustainable Finance Disclosure Regulation (SFDR) and the Corporate Sustainability Reporting Directive (CSRD). Unclear, dense regulations left us constantly uncertain—digging through obscure texts and scattered data, recalculating identical metrics repeated across frameworks, and manually piecing data together without clear examples or benchmarks. 

I vividly remember hours spent buried under spreadsheets, feeling overwhelmed and frustrated by endless manual tasks and ambiguity—all for data that would just tick a compliance box, rather than generating real business value. How many times I wished all these could be automated! This struggle, I realized, wasn’t just mine—it was shared universally across the industry. That realization sparked my determination to democratize ESG reporting, ease this burden for everyone, and actually maximize the value of our work.

What’s the problem you’re trying to solve or the gap you’re trying to fill?

Sustentra attacks a three-headed problem: ESG data that can’t be trusted, mandatory compliance that companies can’t afford, and latent data value can’t be exploited.

Disclosure rules sprawl across hundreds of pages and often leave even regulators debating the fine print. Lacking clear tools, companies shell out for pricey consultants, juggle error-prone spreadsheets, and still submit numbers that investors doubt. This cycle results in a painful financial burden for small and medium enterprises, and even big companies.

We aim to simplify and clarify these regulations through developing an ESG domain-specific large language model. We eliminate the repetitive and frustrating manual tasks that plague ESG reporting, freeing professionals to focus on meaningful, strategic decisions rather than tedious paperwork. With that said, we also assist companies in using the data they collect—spotting inefficiencies, benchmarking performance, and guiding capital allocation so every compliance dollar yields measurable operational gains.

Last but not least, we’re determined to dramatically enhance ESG data accuracy, which we consider the building block of any future actions. Most ESG data today is riddled with estimation and errors, putting companies at serious risk during audits. We proactively identify inaccuracies and risks before they escalate into costly audit failures.

Simply put, we’re aiming to be the TurboTax of ESG reporting, ensuring ESG reporting is reliable, understandable, and affordable while doubling down as a strategic analytics layer that drives ROI on mandatory ESG investments—laying a critical foundation for the global economy’s shift towards sustainability.

What was the most important resource Yale SOM contributed to your startup?

Without a doubt, the most valuable resource from Yale SOM has been its extraordinary community. Many people jokingly call me a “permanent resident” of the entrepreneurship suite at Evans Hall—I practically lived there, soaking up inspiration and guidance from mentors like Jennifer McFadden and Kyle Jensen, as well as fellow entrepreneurs who constantly offered insights, support, and friendship. Professors Edward Watts and Stefano Giglio generously provided detailed guidance, technical expertise, and invaluable contacts. With funding that Professor Soheil Ghil provided during his Pricing Strategy class, we conducted a real-world pricing survey that helped shape Sustentra’s current pricing strategy. Professor Song Ma’s Entrepreneurial Finance class helped me reframe my finance background through an entrepreneurial lens, profoundly shaping how I think as a founder. 

Their constant willingness to help with legal questions, financial projection, and networking has profoundly accelerated our progress. Program on Entrepreneurship staff member Chelsea Spata has also helped me navigate complexities while also being a genuinely supportive friend. Most importantly, I met Pingshan Zhang ’26, my co-founder and dear friend, at Yale. Her impact-driven approach to technology has made building this venture one of the most meaningful parts of my SOM journey.

What’s the biggest milestone your startup has hit so far?

Our biggest milestone so far is the recognition and traction we’ve gained within and beyond Yale. Securing a highly competitive interview with Y Combinator validated our vision and execution capabilities. Receiving Yale’s entrepreneurial fellowship and two donor awards have also been critical, providing not only vital funding but also strong credibility and networking opportunities. Right now, we are actively onboarding pilot clients, marking a huge step forward from concept to real-world impact.

Vivian Cai ’25 is a recipient of the Henry F. McCance Entrepreneurial Award and the Selby Family Entrepreneurship Innovation Award (Summer 2025).