in realizing financial and societal value

We are proud to announce the launch of BlueMark, Tideline’s new independent verification business. We chose this name to symbolize the ‘mark’ our clients receive when their aspirations for a more sustainable and equitable world can be backed by verifiable practices and reports. We are committed to strengthening trust and accountability in impact investing, with impact verification as the next critical piece needed for scaling the impact investing industry with integrity. Learn more about BlueMark and impact verification by visiting