Seznam.cz

Seznam.cz is a Czech technology, media, content, and advertising platform operated by Seznam.cz, a.s. and headquartered in Prague, Czech Republic. Founded in 1996, the company has grown into one of the leading domestic internet platforms in Czechia, operating search, email, news, mapping, classifieds, e-commerce, and advertising services. Seznam positions itself as a platform for the public, businesses, and publishers, and in recent years it has continued investing in its own physical infrastructure, including expansion of its in-house data center footprint to support its services and long-term independence from external suppliers.

⚙️ Facility Highlights

Data Center Footprint:

Seznam currently operates three data centers identified as Osaka, Nagoya, and Kokura. The company states that Nagoya and Kokura are owned by Seznam, while Osaka is leased from O2.

The company’s second in-house data center, Nagoya, opened in Benátky nad Jizerou in March 2023. Seznam states the building covers about 1,200 m² and was built as part of its strategy to become more independent from external suppliers.

In May 2024, Seznam opened its third data center, a new building added to the existing Horní Počernice campus commissioned in 2015. Seznam said that, across its owned sites, up to 6 MW of IT equipment power is planned.

Facility Design & Infrastructure:

For Nagoya, Seznam states the site offers up to 3 MW for IT equipment, with two halls accommodating more than 200 server racks, each supporting up to 15 kW. The company also says the design uses direct free cooling, rainwater-assisted cooling in summer, and targets a PUE of 1.1.

For the newest Horní Počernice expansion, Seznam says it introduced a different power architecture by omitting UPS and batteries on one power branch and relying more heavily on the redundancy of its IT power supplies and multi-source power design.

Seznam also says the latest facility includes sustainability measures such as a water treatment plant, underground rainwater storage, rooftop air-handling support, and warm-air extraction improvements aimed at matching the PUE performance of Nagoya.

Service Portfolio Overview:

1. Consumer internet platform services, including search, email, news, maps, classifieds, and related digital products for Czech internet users.
2. Advertising platform services for businesses using Seznam’s digital properties and ad ecosystem.
3. Content, distribution, and technology platform services for publishers.
4. In-house infrastructure operations supporting Seznam’s own internet, search, content, and AI services rather than a public colocation or third-party cloud product line. Seznam’s 2023 and 2024 releases describe the data centers as internal capacity investments for its own platforms and processing needs.

🔐 Security & Compliance

Infrastructure Resilience:

Seznam’s official data center releases describe a redundancy-focused design with owned and leased facility diversification, multi-source power approaches, and continuous capacity expansion for internal workloads.

In Nagoya, Seznam states the design supports 3 MW of IT load, while the 2024 expansion brought the planned owned-site IT capacity to 6 MW.

Physical & Logical Security:

Seznam does not publish detailed public colocation-style security specifications for these facilities on the sources reviewed, but it does present the sites as mission-critical infrastructure supporting its major consumer and advertising platforms.

Compliance & Standards:

The reviewed Seznam sources focused on infrastructure build-out, capacity, energy efficiency, and platform operations. I did not locate an official Seznam public page in the reviewed material listing data-center-specific ISO or SOC certifications for these facilities.

🌐 Connectivity & Carrier Access

Carrier Neutrality:

The reviewed Seznam sources describe these sites as infrastructure built primarily for Seznam’s own platform operations. I did not locate an official statement marketing the facilities as carrier-neutral third-party colocation environments.

Network Capabilities:

Seznam’s search engineering materials show the scale of the internal platform these facilities support: its crawler downloads about 2.5 billion documents, its index contains about 1.2 billion documents, users enter about 12 million queries per day, and Seznam says it reliably handles around 300 queries per second during peak hours.

Seznam’s 2024 financial release also states the company is pursuing a platform strategy spanning content, advertising, knowledge, communication, social, e-commerce, and cloud, while continuing to build its own AI and infrastructure capabilities.

Connectivity Use Cases:

1. Running Seznam’s own large-scale Czech internet platform and search workloads.
2. Supporting growth in content, advertising, communication, mapping, and AI services on company-controlled infrastructure.
3. Reducing dependence on external suppliers through owned data center expansion.

💼 Who It Serves

1. Czech internet users consuming search, email, maps, news, classifieds, and other digital services.
2. Businesses using Seznam’s advertising platform.
3. Publishers using Seznam as a content, distribution, and technology platform.