EU Sovereignty Score
EU sovereignCAD & EngineeringHeadquarters: CH

Optisizer: sovereignty score and 8 European alternatives

Optisizer is a web tool from optisizer ag in St. Gallen, Switzerland, for planning photovoltaic systems and battery storage for commercial, industrial and multi-family buildings. Installers and energy advisors enter energy consumption and costs, and the tool sizes the system and models self-consumption, peak shaving and charging stations. Dynamic tariffs or spot-market revenue can be included. The result is a report with economic scenarios over the project lifetime for advisors to present to customers. It is offered through a partner model, and free trial access is available.

optisizer ag is headquartered in Switzerland, and its imprint names no foreign parent company. The vendor does not state where the web tool is hosted, so ask it for the data-centre location. According to its privacy policy, personal data is processed under the Swiss data protection act and the GDPR. Switzerland is not an EU member but an EFTA country with an EU adequacy decision. Because consumption data feeds the calculations, ask what is stored and for how long.

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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
YesVendor-stated
Category
CAD & Engineering
Type
Product
Website
optisizer.ch ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to Optisizer

The European alternatives to Optisizer 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

102 European CAD & Engineering 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 Optisizer

Optisizer 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.

Optisizer 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.

Optisizer 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 Optisizer 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 Optisizer?

It depends on your use case. Strong EU alternatives to Optisizer include ACCA software, ALLPLAN and ambiente. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to Optisizer?

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

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

Optisizer is headquartered in CH (EFTA) and hosts data in CH. That makes Optisizer 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 CAD & Engineering

CAD & Engineering: Computer-aided design, 3D modelling and engineering simulation software. 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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8 European alternatives to Optisizer — GDPR-compliant & EU-hosted · EU Sovereignty Score