Whalebone
Brno, CZ · Founded 2016 · 185 employees on LinkedIn · 1 known investors
Whalebone develops no-installation, network-level DNS security and identity protection products for telcos, internet service providers, enterprises, public institutions, and governments. Based in the Czech Republic, it provides secure DNS resolution for the European Union and focuses on mass-market cybersecurity deployments.
Also known as Whalebone s.r.o.
Founders & leadership
Whalebone was founded in 2016 by Robert Šefr.

Investors · 1
Company profile
researched Aug 2026Whalebone develops user-centric, no-installation cybersecurity products delivered at the network level for telecom operators, internet service providers, enterprises, public institutions and governments. Its protection layers cover DNS security, identity protection and fraud call protection, blocking communication with and downloads of malware including botnets, ransomware, spyware and phishing. Because the products work through DNS name resolution on the network itself rather than through installed software, they cover all connected devices on a network, including IoT devices such as smart thermostats and cameras that are difficult or impossible to protect with conventional agents.
The product portfolio is segmented by customer type: Whalebone Aura for telco operators serving B2C, B2B and B2G subscribers; Whalebone Immunity for enterprises and public institutions; and Whalebone Peacemaker for internet providers. The company states its no-installation, no-update approach produces roughly ten times higher adoption than traditional security software, and that its threat intelligence operates in real time rather than through periodic updates. Whalebone leads the DNS4EU project, in which the European Commission selected a Whalebone-led consortium of 13 members from 10 countries as sole developer and operator of the official DNS resolver for the European Union, with a goal of onboarding 100 million EU citizens.
Founding story
Whalebone was established in 2016 in Brno, Czech Republic, by Richard Malovič (CEO) and Robert Šefr (CTO), described as a team of cybersecurity and business enthusiasts. The name refers to the way a blue whale filters plankton: Whalebone filters internet traffic, letting legitimate traffic through and blocking malicious traffic before it reaches the end user.
Business model
B2B/B2B2C: Whalebone licenses its security platform to telecom operators, ISPs, enterprises and public institutions, which in turn offer branded network-level security services to their own subscribers. Operator deployments are marketed as revenue-generating add-on services, for example A1 Net Protect in Austria sold at EUR 1.90 per month, and MTN Ghana's WebGuard and Cellcard's CyberSafe in Cambodia, both powered by Whalebone Aura.
Traction
More than 300 telecom providers use Whalebone's services. Deployments include A1 Net Protect across five A1 markets, O2 Czech Republic, Tele2 Latvia, MTN Ghana (WebGuard), Cellcard Cambodia (CyberSafe), Panasonic Slovakia and DK Wireless in South Africa. The company reported ten service launches across nine countries in a single quarter. The DNS4EU project targets onboarding 100 million EU citizens.
Latest developments
Recent company announcements cover ten service launches across nine countries in one quarter, the launch of MTN Ghana's WebGuard and Cellcard's CyberSafe in Cambodia (both powered by Whalebone Aura), and published research into a 400-domain investment scam network using fake newsrooms.
▸Full profile — market position, technology, go-to-market, geography, history
Market position
Whalebone describes itself as a globally recognized market leader with the highest number of telco mass-market cybersecurity deployments and as the official provider of secure DNS resolution for the European Union, with more than 300 telecom providers using its services and a stated mission to protect one billion people.
Products require no installation or updates and run on the network itself, extending coverage to IoT and other devices that cannot host security agents; the company claims roughly ten times higher adoption than installed security software. Other stated differentiators are real-time threat intelligence rather than update-dependent databases, user-facing touchpoints intended to make protection visible and reduce churn, and its role as leader of the EU-selected DNS4EU consortium.
Technology
The core technology is DNS-layer filtering and threat resolution performed on the operator or enterprise network, requiring no client installation or updates. Threat intelligence is applied in real time rather than through scheduled database updates, and intervenes at multiple stages of a malware lifecycle: before download, before a malicious domain is reached, and when already-resident malware attempts to contact command-and-control infrastructure. Additional layers cover identity protection for users' sensitive data and fraud call protection. Network administrators receive threat analyses and reports, while end users receive alerts. The company's public GitHub organization hosts DNS4EU public resolver documentation and configuration files plus DNS-related tooling such as passive DNS and dnstap forks, Helm charts and a SAML SSO service.
Go-to-market
Sales run through communication service providers and enterprise channels, with a direct sales organization structured by region under vice presidents for North America, Latin America, Europe, Nordics/Central Asia/Caucasus/Ukraine, Middle East and Africa, South Asia and Asia-Pacific. Operator partnerships are positioned as white-label consumer security services carrying the operator's brand. The company publishes threat research and launch announcements on its blog and lists sales contact via sales@whalebone.io.
Telecom operators, internet service providers, enterprises, public institutions and governments; through those channels, consumer, business and government end users. Named customers and partners include A1 (Austria and four further markets), O2 Czech Republic, Tele2 Latvia, MTN Ghana, Cellcard (Cambodia), Panasonic Slovakia and DK Wireless (South Africa).
Geography
Headquartered in Brno, Czech Republic, with a presence at the A1 Start Up Campus in Vienna since 2017 and regional leadership covering Europe, the Nordics, Central Asia, the Caucasus and Ukraine, North America, Latin America, the Middle East and Africa, South Asia and Asia-Pacific. Customer deployments span Austria, the Czech Republic, Latvia, Slovakia, Ghana, Cambodia and South Africa.
History
Founded in 2016 in Brno, Czech Republic, Whalebone joined the A1 Start Up Campus in Vienna in 2017 and later deepened its partnership with A1, whose A1 Net Protect service is built on Whalebone's DNS-based security and sold in five countries across the A1 ecosystem. O2 in the Czech Republic is also cited as a customer. The company was subsequently selected to lead the European Commission's DNS4EU consortium as developer and operator of the EU's official DNS resolver, and reports over 300 telecom providers using its services.
Compiled by commissioned research from 8 cited public sources — announcements, filings, and press listed under research sources below.
Key figures
latest reportedCompany-reported or press-reported figures, each dated to when it was claimed — not independently audited.
Timeline · 7
launches, deals, and filingsWhalebone reported ten launches in nine countries during a single quarter, expanding network-level security across four markets.
Whalebone became a startup based at the A1 Start Up Campus in Vienna.
Whalebone was founded in 2016 in Brno, Czech Republic, by Richard Malovič (CEO) and Robert Šefr (CTO).
A1 launched A1 Net Protect, a network-level security product for the Austrian market based on Whalebone's DNS security, available to all A1 customers from March 16 at EUR 1.90 per month; the product is sold in five countries within the A1 ecosystem.
The European Commission selected a Whalebone-led consortium of 13 members from 10 countries as the sole developer and operator of the official DNS resolver for the European Union, with a goal of onboarding 100 million EU citizens.
Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.
▸Research sources · 8
primary sources listed
- Whalebonewhalebone.io · web
8 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does Whalebone do?
- Czech cybersecurity company providing no-installation, network-level DNS security to telcos, ISPs, enterprises and governments.
- Who founded Whalebone?
- Whalebone was founded by Robert Šefr in 2016.
- Who are Whalebone's investors?
- Whalebone's investors include Day One Capital.
- Where is Whalebone headquartered?
- Whalebone is headquartered in Brno, CZ.
