15Five

15Five is a performance management platform that helps HR teams turn manager 1:1s, engagement surveys, and performance reviews into measurable outcomes like retention and engagement. Over 3,000 companies — including HubSpot, Pendo, and MongoDB — use it to make managers more effective and connect people initiatives to business results. The product has been expanding into AI-assisted reviews, manager coaching, and compensation tooling, all centered on a human-centered leadership thesis. The team supports flexible work arrangements and generous parental leave, with a culture organized around values like making impact and continuous learning.