One Tech Group GmbH
One Tech Group GmbH is a Hamburg-based AdTech company and one of Europe's leading independent supply-side platform (SSP) providers for digital out-of-home (DOOH), OOH, and programmatic audio channels. Its unified One Tech Platform consolidates four core products — ADSERVER1, SSP1, DMP1, and NMS1 — enabling publishers to manage, sell, and optimise advertising inventory across digital screens, static OOH, and linear radio from a single interface. Since 2025, the company has positioned itself as the dedicated infrastructure provider for the fast-growing in-store retail media vertical, securing marquee partnerships with Rossmann, MediaMarktSaturn, XXXLutz, and Intersport.
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The One Tech Platform is a consolidated four-product suite for DOOH, OOH, static print, and radio publishers:
- ADSERVER1 — centralised ad server for managing direct IO bookings, creative delivery, and real-time performance optimisation across all channels
- SSP1 — the flagship supply-side platform connecting publishers to programmatic demand via 14+ DSPs, supporting Guaranteed Deals, Preferred Deals, Private Auction, and Open Auction deal types; positioned as the largest programmatically bookable DOOH inventory platform in DACH
- DMP1 — data management platform for collecting, analysing, and activating first- and third-party audience and frequency data; includes a data interface/API for customer first-party data activation
- NMS1 — network management and sales system purpose-built for DOOH publishers, covering inventory management, offer creation, and document storage
The platform spans DOOH, OOH, static print, and linear radio channels. Complementary professional services include Managed Service, Programmatic Expert consulting, and Business Case Check. Since 2025, One Tech Group has also positioned the platform as dedicated in-store retail media infrastructure.
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