Non-EU vendorWriting Assistance & GrammarHeadquarters: US

HyperWrite: sovereignty score and 8 European alternatives

HyperWrite is an AI writing assistant with features such as autocomplete, rewriting content, email replies, a chat assistant and research help with citations. It also offers a Chrome extension that shows writing suggestions as you type on any website. HyperWrite is delivered as SaaS through its website and browser extension and is a product of OthersideAI.

The provider is OthersideAI Inc. from the United States, so the service falls under US jurisdiction, including the CLOUD Act. According to its privacy policy, personal information may be transferred to the United States or other countries where privacy laws may be less protective. The policy names no storage location, does not name sub-processors and does not refer to the GDPR. The vendor does not name a European hosting option. European organisations that have confidential text processed should therefore ask about a data processing agreement and the processing location in advance, or consider a writing assistant of European origin.

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

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Sovereignty score

17 / 1000 = high exposure
100 = sovereign

Jurisdiction SOV-210
Headquartered in the US: CLOUD Act and FISA 702
Data residency SOV-30
No hosting in Europe (US)
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 11, 2026

Headquarters	US (US)Verified 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	USVerified by hand
Open-source	NoVerified by hand
GDPR-compliant	NoVendor-stated
Category	Writing Assistance & Grammar
Type	Product
Website	hyperwriteai.com ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to HyperWrite

The European alternatives to HyperWrite 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

19 European Writing Assistance & Grammar 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 HyperWrite

HyperWrite 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.

HyperWrite hosts data outside the EU (US). Personal data therefore leaves the EU, which requires a transfer mechanism under the GDPR and pulls the data residency score down.

HyperWrite 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 HyperWrite 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 HyperWrite?

It depends on your use case. Strong EU alternatives to HyperWrite include CKEditor, Congree and DeepL Write. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to HyperWrite?

Yes. Open-source EU alternatives to HyperWrite include CKEditor, Grammalecte, Kate and LanguageTool. These keep your data fully under your own control and let you self-host if you want to.

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

HyperWrite is headquartered in US and hosts data in US. Its GDPR compliance is limited or unclear. 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 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 Writing Assistance & Grammar

Writing Assistance & Grammar: Grammar checking, spell checking, style advice and AI writing assistants. 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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