Arbor Energy vs Diligent ESG
Side-by-side comparison of AI visibility scores, market position, and capabilities
Raised $55M Series A + $41M from Frontier (Oct 2025). $1B+ GridMarket order for up to 5 GW of turbines (Mar 2026). SpaceX-alumni team applying rocket turbomachinery to grid power.
About
Arbor Energy is developing biomass-fired rocket turbines that combust waste biomass at extremely high temperatures, producing supercritical CO2 as a working fluid that drives a turbine — making it a carbon-negative power source that captures CO2 as a byproduct rather than releasing it. The company raised $55 million in Series A financing plus $41 million from the Frontier carbon removal marketplace, and received a $1 billion+ order from GridMarket for up to 5 gigawatts of turbine capacity in March 2026 — one of the largest commercial orders in the energy startup category.
New York NY. Board governance and ESG management platform serving 700,000+ board members globally, acquired Galvanize and BoardEffect for integrated risk and ESG.
About
Diligent is a New York-based governance, risk, and compliance (GRC) platform that has become one of the largest providers of board management and ESG software globally. The company serves over 700,000 board members and executives across 90+ countries, and has expanded its platform through strategic acquisitions including Galvanize (compliance and audit management) and BoardEffect (board portal for nonprofits and healthcare). Its ESG module integrates ESG data management with board-level governance workflows.\n\nDiligent ESG enables companies to collect ESG metrics across environmental, social, and governance dimensions, align with major reporting frameworks including GRI, TCFD, SASB, and the UN SDGs, and prepare board-level sustainability reports. The platform connects ESG performance data directly to the board agenda management workflow, allowing directors to review and approve sustainability disclosures within the same secure environment they use for board meetings and governance.\n\nDiligent targets large public companies, financial institutions, and regulated organizations that need to demonstrate strong governance around their ESG programs, not just report data. It competes with ServiceNow ESG, Workiva, and SAP Sustainability in the enterprise segment. Diligent's key differentiator is the integration of ESG with board governance—allowing sustainability to be managed as a fiduciary responsibility rather than a standalone compliance exercise.
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