Insider One

Insider One is an AI-powered Customer Engagement Platform that gives marketing and customer engagement teams an end-to-end system in a single product. At its core is an integrated Customer Data Platform, which feeds journey orchestration across a set of natively supported channels including WhatsApp, SMS, email, web, app and site search. The company describes its platform as the leading AI-powered Customer Engagement Platform and reports more than 2,000 customers, ranging from high-growth startups to Fortune 500 firms. Named clients include Samsung, Nike, L'Oréal, Singapore Airlines, Nestlé, Nissan, Lenovo, Puma, IKEA, Allianz and Domino's.

Technical work spans machine learning, customer data infrastructure, journey orchestration, marketing automation, multi-channel messaging and site search. The business raised $500m in a Series E round, one of the largest in the industry, with investors including General Atlantic, which led, alongside Sequoia Capital, QIA, Riverwood and Endeavor Catalyst. Formerly known as Insider, the company rebranded to Insider One in December 2025.

The firm employs more than 1,500 people across over 30 offices worldwide, with more than 50 nationalities represented. It is a woman-founded, women-led B2B SaaS company, among the few of its kind to reach unicorn status. The stated mission is to help marketing and customer engagement teams reach their full potential.