Onetagger is a Belgium-based provider of server-side tagging and tracking tools designed to make a complex setup easier for businesses and marketing teams. Its platform offers server-side tagging hosting and streamlined conversion tracking, helping customers collect more accurate marketing data and better understand visitor journeys. Onetagger’s one-tag solution connects with more than 300 integrations, including Meta, TikTok, Google Analytics, and Google Ads.

Its features include cookie recovery, support for moving from third-party to first-party cookies, and first-party scripts intended to help ads reach users despite ad blockers. The company also offers setup assistance, a free starting option, live demos, and a partner program for organizations that want to provide server-side services to their own customers. Onetagger says it owns its server hardware and operates in Belgium, and describes its solutions as AVG/GDPR compliant.

By simplifying implementation and bringing marketing data together across platforms, Onetagger aims to help customers refine campaigns, measure conversions, and make more informed advertising decisions