Transparent Programmatic
Advertising for Mobile
Oprello is a mobile ad exchange and SSP built on open standards. We connect app publishers with premium demand partners through OpenRTB 2.5, with full supply chain transparency and privacy compliance.
Our Mission
To make programmatic ad monetization accessible and transparent for every mobile app publisher. We believe that developers of any size should have access to premium demand, fair auctions, and clear reporting without hidden fees or opaque pricing.
Our Vision
A mobile advertising ecosystem where every impression is traceable through the supply chain, every auction is fair, and every publisher can see exactly where their revenue comes from. Transparency is not optional -- it is the foundation.
About Oprello
Key facts about our company
Founded
Oprello was founded in 2026 with the goal of building a transparent, standards-based mobile ad exchange.
Headquarters
Based in Frankfurt, Germany, with cloud infrastructure hosted in the EU (fra region) for low-latency ad serving.
Focus
We specialize in mobile in-app advertising, connecting publishers with demand partners through OpenRTB 2.5.
Our Core Values
The principles that guide everything we build
Open Standards
Built on OpenRTB 2.5, IAB Tech Lab specifications, and open supply chain protocols. No proprietary lock-in.
Transparency
Full visibility into auction mechanics, pricing, and supply chain. ads.txt, sellers.json, and schain from day one.
Privacy First
GDPR, CCPA, and COPPA compliance built into the core. Consent signals flow through to every demand partner.
Developer Experience
Lightweight SDKs, clear documentation, and responsive support. Integration should take hours, not weeks.
The Technology
What powers the Oprello ad exchange
Ad Exchange Server
OpenRTB 2.5 compliant exchange server that fans out bid requests to DSP partners in parallel, runs first-price auctions, and returns winning creatives to the SDK.
Native Mobile SDKs
Kotlin SDK for Android (minSdk 24) and Swift SDK for iOS (12+). Support for banner, interstitial, rewarded, native, and app open ad formats.
Mediation Adapters
AppLovin MAX waterfall adapters for both Android and iOS. Use Oprello as a demand source alongside other networks in your mediation stack.
MRAID 3.0 & VAST
Full support for MRAID rich media ads and VAST video creatives. End cards and companion banners are supported across all fullscreen formats.
Privacy Infrastructure
TCF v2.2 consent string passthrough, IAB US Privacy, GPP, and COPPA flag support. Auto-reads from CMP SharedPreferences/UserDefaults.
Analytics Dashboard
Real-time reporting with 13 metrics across 5 dimensions. Revenue, impressions, eCPM, fill rate, and more -- sliced by app, ad unit, country, and device.
Standards & Compliance
Built on industry standards from day one
OpenRTB 2.5
- Full bid request/response spec
- Banner, video, native objects
- PMP deals support
- Macro replacement
Supply Chain
- ads.txt verification
- sellers.json published
- SupplyChain object (schain)
- GARM brand safety framework support
Privacy
- GDPR / TCF v2.2 consent
- CCPA / US Privacy string
- GPP consent framework
- COPPA child-directed flags
Our Team
Oprello is built by a small, focused team with experience in ad tech, mobile development, and cloud infrastructure. We are based in Frankfurt, Germany.
We are a growing team and always looking for talented people who are passionate about building transparent ad tech. If you are interested in joining us, please reach out at hello@oprello.com.
Ready to Get Started?
Whether you're looking to monetize your app or integrate as a demand partner, we'd love to hear from you.