Self-hosted / open sourceNetwork & MonitoringHeadquarters: IT

ntopng: sovereignty score and 8 European alternatives

ntopng is a web-based network traffic probe for traffic analysis and flow collection. It provides real-time and historical views of network traffic, top talkers and application detection through the nDPI engine, and ingests data from traffic mirrors, NetFlow exporters, SNMP devices, firewall logs and IDS systems. Further capabilities include alerts, a REST API, geolocation of hosts and export to Elasticsearch or ClickHouse. It runs on Linux, FreeBSD, Windows and macOS, and it can be paired with nProbe for flow collection on high-speed links.

ntopng is developed by ntop, whose legal information page lists Italy as its country; its staff are geographically distributed across Europe. The Community edition is open source under the GNU GPLv3, while the Pro and Enterprise editions are commercial and licensed under ntop's EULA. ntopng is software that runs on your own systems, so traffic metadata stays on your own infrastructure rather than in a vendor cloud. For European organisations this makes it a self-hosted option for network visibility, with a European supplier behind the commercial editions.

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Sovereignty score

94 / 1000 = high exposure
100 = sovereign

Jurisdiction SOV-2100
Headquartered in the EU: European law applies
Data residency SOV-3100
EU-only hosting
Cryptographic key sovereignty SOV-390
Self-hostable: encryption keys under your own control
Freedom from lock-in SOV-680
Open source: low switching costs
Source & runtime sovereignty SOV-4 · SOV-6100
Source code auditable, forkable and self-hostable

SOV codes: the matching objective in the European Commission's Cloud Sovereignty Framework. Official source

How the score is calculated

Facts and evidence

Last checked July 2, 2026

Headquarters	IT (EU)Verified by hand
Sovereignty model	Open-source, distributedVerified by hand
Data hosting	EUVerified by hand
Open-source	YesVerified by hand
GDPR-compliant	YesVendor-stated
Compliance documents	1 published, see belowVendor-stated
Hosting signal	HETZNER-AS - Hetzner Online GmbH, DE (DE)Technically measured
Category	Network & Monitoring
Type	Product
Website	ntop.org ↗

The hosting signal shows the network that serves the vendor's website, often a CDN, and not necessarily where the service or your data is hosted. How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to ntopng

The European alternatives to ntopng come from our knowledge base of over 6,800 vendors. We only list vendors headquartered in the EU or the EEA; fully European-owned vendors rank before vendors with a foreign owner. For each alternative you see the country, the open-source status and a short description.

Score per alternative: 0 = high exposure, 100 = sovereign

41 European Network & Monitoring vendors are in the catalogue. View the whole category · Submit an alternative · View category on the map

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Why digital sovereignty matters with ntopng

ntopng is headquartered in IT and therefore falls under European law: the GDPR, NIS2 and the Data Act. No foreign legislation can compel access to your data.

Data is hosted exclusively in the EU, so ntopng scores best on data residency.

ntopng is open source. You can audit the source code, self-host the software and keep the encryption keys under your own control. Switching is easier because data and software are not tied to a single party.

What this means for your organisation depends on your whole stack and context. The free assessment weighs ntopng together with your other vendors and gives a total score, a heatmap and the main risk drivers.

Frequently asked questions

What is the best European alternative to ntopng?

It depends on your use case. Strong EU alternatives to ntopng include Centreon, Checkmk and collectd. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to ntopng?

Yes. Open-source EU alternatives to ntopng include Centreon, Checkmk, collectd and Healthchecks.io. These keep your data fully under your own control and let you self-host if you want to.

Is ntopng GDPR-compliant and where is the data hosted?

ntopng is headquartered in IT (EU) and hosts data in EU. It is also open-source, so you can self-host it. That makes ntopng an EU-sovereign choice in its own right; the EU alternatives on this page are comparable European tools.

Details and sources

Verified by handHeadquarters, owner, hosting locations and licence have been checked by us against public sources. Free of charge and for every vendor, not a paid label. Nothing in this knowledge base is taken over automatically. Last checked on July 2, 2026.

Sources

This record was checked via the vendor's website and legal notice during the full audit of June and July 2026. Source links have been recorded per record since 20 September 2026.

Compliance evidence

The links below point to the vendor's own public documents. We only record what we found: a missing link means "not found publicly", not "not compliant".

Security page / trust center: ntop.org/threat-detection-network-security/

Provenance of the links above:Vendor-stated

Links checked on September 21, 2026.

Digital sovereignty in Network & Monitoring

Network & Monitoring: Network monitoring, infrastructure monitoring, log management and observability. In this category the choice of vendor determines who has legal access to your data, where that data lives and how easily you can switch later.

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