EU Sovereignty Score
EU sovereignSocial MediaHeadquarters: DE

Tellonym: sovereignty score and 8 European alternatives

Tellonym is a mobile app in which users ask questions, send messages and share thoughts with friends and other users, often anonymously. The app's store listing describes it as a way to stay connected with friends. It has been on the market since 2016 and is developed by Callosum Software GmbH, a German software company.

Callosum Software GmbH is established in Germany, so the operator falls under German and EU data protection law. Where Tellonym's servers are located is not publicly documented, and neither a data processing agreement nor a GDPR commitment is mentioned for the service. The service is distributed as an app through app stores and is aimed at private users. For a European organisation this is a consumer app rather than a work tool, so data location and retention should be checked before any professional use.

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Sovereignty score
71 / 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-360
    Key management with a European vendor
  • Freedom from lock-in SOV-640
    Closed source: switching requires data migration
  • Source & runtime sovereignty SOV-4 · SOV-655
    Closed source, runtime with the vendor

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 October 11, 2026
Headquarters
DE (EU)Verified by hand
Sovereignty model
Vendor-hosted (EU)Verified by hand
Data hosting
EUVerified by hand
Open-source
NoVerified by hand
GDPR-compliant
NoVendor-stated
Category
Social Media
Type
Product
Website
tellonym.me ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to Tellonym

The European alternatives to Tellonym 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

34 European Social Media 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 Tellonym

Tellonym is headquartered in DE 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 Tellonym scores best on data residency.

Tellonym is closed source and hosted by the vendor. The encryption keys and the runtime sit with the vendor and switching requires data migration. Ask about bring-your-own-key, export options and open standards.

What this means for your organisation depends on your whole stack and context. The free assessment weighs Tellonym 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 Tellonym?

It depends on your use case. Strong EU alternatives to Tellonym include Agorapulse, Akkoma and BeReal. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to Tellonym?

Yes. Open-source EU alternatives to Tellonym include Akkoma and Diaspora. These keep your data fully under your own control and let you self-host if you want to.

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

Tellonym is headquartered in DE (EU) and hosts data in EU. That makes Tellonym 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 October 11, 2026.

Sources

Public sources used in the latest check of this record.

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".

No public compliance evidence has been recorded for this vendor yet. Do you know its DPA or subprocessor list? Something wrong? Suggest a correction

Digital sovereignty in Social Media

Social Media: Social networks — posts, media, communities. 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.

Also in this category

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8 European alternatives to Tellonym — GDPR-compliant & EU-hosted · EU Sovereignty Score