Non-EU vendorPlanning & EPMHeadquarters: US

OneStream Software: sovereignty score and 8 European alternatives

OneStream is a software platform for finance teams that brings financial close, consolidation, planning, forecasting and reporting together in one environment (enterprise performance management, EPM). Its capabilities include account reconciliations, transaction matching, driver-based planning and scenario modelling, supplemented by AI agents for finance tasks. Teams can start with one capability, such as close or planning, and add others later. OneStream is a cloud-based platform; according to its documentation, each customer is assigned a cloud region.

OneStream is headquartered in Birmingham, Michigan. On 1 April 2026, Hg, a private-equity firm based in London, completed its acquisition. OneStream is no longer publicly listed; Hg is the majority voting shareholder, with General Atlantic and Tidemark as minority investors. The company remains a US entity and is subject to US law, including the CLOUD Act. Customers are assigned a region based on their base location: for Europe, the Middle East and Africa the default is Western Europe with Northern Europe as the secondary region, and UK regions are available on request. The software is proprietary.

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Sovereignty score

27 / 1000 = high exposure
100 = sovereign

Jurisdiction SOV-210
Headquartered in the US: CLOUD Act and FISA 702
Data residency SOV-350
Hosting inside and outside Europe (US, EU)
Cryptographic key sovereignty SOV-320
Key management with a non-European vendor
Freedom from lock-in SOV-640
Closed source: switching requires data migration
Source & runtime sovereignty SOV-4 · SOV-615
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 8, 2026

Headquarters	US (US)Verified by hand
Ultimate parent company	GBVerified by hand
EU adequacy decision	Only for companies individually certified under the EU-US Data Privacy FrameworkVerified by hand
Sovereignty model	Vendor-hosted (non-EU)Verified by hand
Data hosting	US, EUVerified by hand
Open-source	NoVerified by hand
GDPR-compliant	YesVendor-stated
Category	Planning & EPM
Type	Product
Website	onestream.com ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to OneStream Software

The European alternatives to OneStream Software 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

22 European Planning & EPM 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 OneStream Software

OneStream Software is headquartered in the United States. US vendors fall under the CLOUD Act and FISA 702: US authorities can compel access to data, even when that data sits in a European data centre. That is the core of the jurisdictional exposure in our model. The ultimate owner is based in GB. Foreign control undermines part of the certainty a European headquarters offers.

OneStream Software hosts data in US, EU. Exactly what stays within the EU — and what does not — is defined by the vendor's data processing agreement and sub-processor list, not by a setting you control yourself; check those documents for the precise scope, including backups, logs and support access.

OneStream Software 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 OneStream Software 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 OneStream Software?

It depends on your use case. Strong EU alternatives to OneStream Software include Board International, CCH Tagetik and CoPlanner. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to OneStream Software?

Our list of EU alternatives to OneStream Software is mostly commercial options. Browse the category on the map for open-source choices.

Is OneStream Software GDPR-compliant and where is the data hosted?

OneStream Software is headquartered in US and hosts data in US, EU. The vendor states it is GDPR-compliant, but the data falls under non-EU jurisdiction. For full EU data residency the EU alternatives on this page usually offer more certainty.

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 8, 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 Planning & EPM

Planning & EPM: Budgeting, forecasting, scenario analysis, consolidation and enterprise performance 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.

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