EU Sovereignty Score
EU sovereignESG & SustainabilityHeadquarters: CH

rezonanz: sovereignty score and 8 European alternatives

rezonanz is a platform from rezonanz AG for investor stewardship insight. It turns voting behaviour at shareholder meetings and engagement data into comparisons and reports. Functions include benchmarking of voting records against peers and a reference framework of its own, monitoring of votes across a portfolio with configurable alerts, and tracking and reporting of engagement. The service is aimed at pension funds, asset managers, fund selectors and the investor relations teams of companies. Users work in a web application with their own account. Part of the data comes from publicly available minutes of general meetings.

rezonanz AG is based in Zurich, Switzerland. The website does not say where the platform is hosted. Its privacy policy states that service providers may be partly located in third countries, with contractual safeguards. Ask about the hosting location and the processors. Switzerland is not an EU member but an EFTA country with an EU adequacy decision. The vendor does not mention a self-hosting option.

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Sovereignty score
67 / 1000 = high exposure
100 = sovereign
  • Jurisdiction SOV-2100
    Headquartered in Switzerland: Swiss law, recognised by the EU as adequate
  • Data residency SOV-380
    Hosting in Switzerland only (recognised by the EU as adequate)
  • 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 14, 2026
Headquarters
CH (EU)Verified by hand
Sovereignty model
Vendor-hosted (EU)Verified by hand
Data hosting
CHVerified by hand
Open-source
NoVerified by hand
GDPR-compliant
NoVendor-stated
Category
ESG & Sustainability
Type
Product
Website
rezonanz.io ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to rezonanz

The European alternatives to rezonanz come from our knowledge base of over 9,200 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

67 European ESG & Sustainability 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 rezonanz

rezonanz is headquartered in Switzerland and falls under Swiss law, including the revised Swiss data protection act. Switzerland is not an EU member, but the European Commission recognises its level of data protection as adequate. Its Swiss headquarters does not by itself bring it under US legislation such as the CLOUD Act.

rezonanz hosts data in Switzerland only. Switzerland is not part of the EU or the EEA, so the GDPR does not apply there directly; the European Commission does recognise Swiss data protection as adequate, so personal data can go there without extra safeguards. Our model therefore scores it between EU hosting and hosting outside Europe. If you require strictly EU hosting, take this into account.

rezonanz 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 rezonanz 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 rezonanz?

It depends on your use case. Strong EU alternatives to rezonanz include bluesign, Brightway and Carbmee. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to rezonanz?

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

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

rezonanz is headquartered in CH (EFTA) and hosts data in CH. That makes rezonanz 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 14, 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

In the changelog

Earlier changes to this page, as listed in the public changelog.

Digital sovereignty in ESG & Sustainability

ESG & Sustainability: Carbon accounting, CSRD reporting, supply-chain due diligence (CSDDD/EUDR/CBAM) and ESG data management. 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 rezonanz — GDPR-compliant & EU-hosted · EU Sovereignty Score