EU Sovereignty Score
EU sovereignSMS APIsHeadquarters: France

Prelude: sovereignty score and 8 European alternatives

Prelude is a French API service for verifying users and preventing fraud at sign-up. Developers send one-time codes by SMS, RCS, WhatsApp or email, use silent network verification and have a risk score calculated from device, network and carrier signals to limit SMS pumping fraud. There are also components for authentication management, number intelligence and transactional messaging. SDKs exist for Node.js, Python, Go, Java and mobile platforms, among others.

The service is operated by a French company based in Paris; no owner outside France is named. Its privacy policy states that personal data is hosted on Amazon Web Services servers in the European Union and that transfers outside the EU take place only with appropriate safeguards. External channel providers are involved in message delivery. Because hosting is with a US cloud provider, it is worth requesting the data processing terms and the list of sub-processors.

See the 8 European alternatives ↓Assess your stack with Prelude pre-selected
MastodonLinkedInBlueskyXEmail
Sovereignty score
71 / 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-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 17, 2026
Headquarters
FranceVerified by hand
Sovereignty model
Vendor-hosted (EU)Verified by hand
Data hosting
EUVerified by hand
Open-source
NoVerified by hand
GDPR-compliant
YesVendor-stated
Category
SMS APIs
Type
Product
Website
prelude.so ↗

How we verify · Something wrong? Suggest a correction

European alternatives to Prelude

The European alternatives to Prelude come from our knowledge base of over 9,900 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

43 European SMS APIs vendors are in the catalogue. View the whole category · Submit an alternative · View category on the map

Is Prelude 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 Prelude

Prelude is headquartered in France 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 Prelude scores best on data residency.

Prelude 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 Prelude 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 Prelude?

It depends on your use case. Strong EU alternatives to Prelude include 46elks, Agile Telecom and AnyMessage. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to Prelude?

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

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

Prelude is headquartered in France (EU) and hosts data in the EU. That makes Prelude 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 17, 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 SMS APIs

SMS APIs: API services for sending SMS messages to customers. 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 dashboardMissing a vendor? Submit itAre you this vendor, a reseller or an implementation partner? You can sponsor the SMS APIs page and its open-source page — with no effect on any score
8 European alternatives to Prelude (GDPR)