Founded in 2014, Tideline is a consulting firm that provides tailored advice to clients developing impact investment strategies, products, and solutions. Our mission is to help clients excel in realizing financial and societal value. We believe in shared, sustainable prosperity powered by market-based solutions. To that end, our services include strategy development, impact management system design, impact due diligence, impact monitoring & reporting, and impact verification.

BlueMark, a Tideline company, is a leading provider of independent impact verification services for investors and companies. Our mission is to strengthen trust in impact investing by delivering independent, incisive verification services, enabling the market to scale with integrity. We evaluate and verify how clients approach the impact in impact investing based on accepted industry standards. Our services are designed to meet the growing investor demand and market expectation for greater confidence and credibility in the impact label, especially as impact claims are more closely scrutinized by a range of stakeholders.

Our multi-disciplinary team delivers services of unmatched quality, grounded in deep, rigorous research and analysis. Past clients have included leading global asset owners, asset managers, and service providers active in impact investing. Tideline has offices in New York, NY; San Francisco, CA; London, UK; and Portland, OR.