EU Sovereignty Score
Self-hosted / open sourceAI CoworkHeadquarters: US

Letta: sovereignty score and 8 European alternatives

Letta is a platform for building stateful AI agents that keep persistent memory and can improve over time. It grew out of MemGPT research at UC Berkeley's Sky Computing Lab and is developed by Letta, based in San Francisco. Developers use a command-line tool called Letta Code, and the core platform is published as open source on GitHub, so it can run on the organisation's own infrastructure.

Sovereignty depends mainly on where the company is based and where data is stored. Letta is based in San Francisco; its public pages name no parent company and do not state where a hosted service stores data. Because the code is licensed under Apache 2.0, a European organisation can run the agents on its own infrastructure and keep agent memory under its own control. Using the hosted service means dealing with a US provider under US jurisdiction, so the processing terms should be checked first.

See the 8 European alternatives ↓Assess your stack with Letta pre-selected
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Sovereignty score
69 / 1000 = high exposure
100 = sovereign
  • Jurisdiction SOV-210
    Headquartered in the US: CLOUD Act and FISA 702
  • Data residency SOV-3100
    No hosting in Europe (US)
  • Cryptographic key sovereignty SOV-390
    Self-hostable: encryption keys under your own control
  • Freedom from lock-in SOV-680
    Open source: low switching costs
  • Source & runtime sovereignty SOV-4 · SOV-665
    Source code auditable, forkable and self-hostable

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
Data hosting
Self-hosted, e.g. in US (your choice)Verified by hand
Open-source
YesVerified by hand
GDPR-compliant
NoVendor-stated
Category
AI Cowork
Type
Product
Website
letta.com ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to Letta

The European alternatives to Letta 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

20 European AI Cowork 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 Letta

Letta 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.

Letta 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.

Letta is open source. You can audit the source code, self-host the software and keep the encryption keys under your own control. Switching is easier because data and software are not tied to a single party.

What this means for your organisation depends on your whole stack and context. The free assessment weighs Letta 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 Letta?

It depends on your use case. Strong EU alternatives to Letta include 2501.ai, Beam and Cognigy. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to Letta?

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

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

Letta 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 AI Cowork

AI Cowork: Autonomous AI desktop agents — multi-step task execution, document processing, workflow automation. 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 Letta — GDPR-compliant & EU-hosted · EU Sovereignty Score