# Cornerstone Partners > Analysis by Optimly for Optimly AI Visibility, in the Optimly AI Brand Index. Last analyzed September 8, 2026. > CornerStone Partners provides Outsourced Chief Investment Officer and investment office (OCIO) services to a select group of not-for-profit organizations. They build long-term partnerships designed to achieve investment outperformance and operational excellence, relieving clients of the challenges of building and maintaining an in-house investment office. - Business Profile: https://optimly.ai/brand/cornerstone-partners - Publisher: Optimly (https://optimly.ai) - Dataset: Optimly AI Brand Index (https://optimly.ai/brand) - Official website: https://cstonellc.com/ - Logo: https://logo.clearbit.com/cstonellc.com - Slug: cornerstone-partners - Brand Authority Index tier: Emerging - Category: Outsourced Chief Investment Officer (OCIO) Services - Last Analyzed: September 8, 2026