EU sovereignCollaborationHeadquarters: DE

OpenTalk: sovereignty score and 8 European alternatives

OpenTalk is a video conferencing platform for public authorities, companies, educational institutions and NGOs. It offers chat, polls, breakout rooms, an interactive whiteboard, recording, moderation controls and telephone dial-in; higher tiers add streaming and anonymous voting, among other things. OpenTalk is available as a cloud service (OpenTalk as a Service), which runs in the browser without additional software, and as an installation on the customer's own servers, connected to local user management. A free entry tier of the cloud service exists.

OpenTalk is offered by OpenTalk GmbH in Berlin, part of the Heinlein Gruppe. According to the vendor, the cloud service runs in German data centres and is operated in line with GDPR; a data processing agreement is available. The source code (frontend, Rust backend and server code) has been published under the European Union Public Licence (EUPL) on the German public-sector platform OpenCoDE since February 2023. Self-hosting requires Linux administration skills. A European organisation can therefore choose between a service hosted in Germany and full control on its own infrastructure.

See the 8 European alternatives ↓Assess your stack with OpenTalk pre-selected

Mastodon LinkedIn Bluesky X Email

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	DE (EU)Verified by hand
Sovereignty model	Vendor-hosted (EU)Verified 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	HPLS-AS - Heinlein Support GmbH, DE (DE)Technically measured
Category	Collaboration
Type	Product
Website	opentalk.eu ↗

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 OpenTalk

The European alternatives to OpenTalk 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

37 European Collaboration vendors are in the catalogue. View the whole category · Submit an alternative · View category on the map

Is OpenTalk one of many dependencies?

Score your whole stack in about three minutes. Free, no account needed.

Assess your stack →View a sample report (opens in a new tab)

Why digital sovereignty matters with OpenTalk

OpenTalk 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 OpenTalk scores best on data residency.

OpenTalk 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 OpenTalk 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 OpenTalk?

It depends on your use case. Strong EU alternatives to OpenTalk include BigBlueButton (self-host), CryptPad and Nextcloud Deck. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to OpenTalk?

Yes. Open-source EU alternatives to OpenTalk include BigBlueButton (self-host), CryptPad, Nextcloud Deck, FluffyChat and HedgeDoc. These keep your data fully under your own control and let you self-host if you want to.

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

OpenTalk is headquartered in DE (EU) and hosts data in EU. It is also open-source, so you can self-host it. That makes OpenTalk 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: opentalk.eu/de/datenschutzhinweise

Provenance of the links above:Vendor-stated

Links checked on September 21, 2026.

Digital sovereignty in Collaboration

Collaboration: Team communication, file sharing, video conferencing, document editing. 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

See all →

Open in the alternatives dashboard Missing a vendor? Submit it Are you this vendor? You can also become a sponsor on the Collaboration page — with no effect on your score