Signal Foundation (US 501c3), Mountain View. Open-source E2E messenger. Non-profit but US.
ALTERNATIVES
5
CLOUD-ACT · NONE
1
WITH BSI C5
0
FREE TIER
3
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TOP PICKS
Which are the closest Signal alternatives?
Ordered by feature parity and migration friction, which is weighted higher than feature breadth.
TH
Threema
Switzerland · Founded 2012
EU-SOVEREIGN
★ #1 PICK
Swiss E2EE messenger (Pfäffikon SZ, founded 2012), ISO 27001, all-Swiss hosting, no phone number required; consumer + enterprise (Threema Work) + on-prem.
French E2EE messenger (Olvid SAS, Paris, founded 2019), ANSSI CSPN certified, mandated for French government ministers; no phone number/identifier, content + metadata encrypted.
UK-incorporated open-source E2EE messenger (SimpleX Chat Ltd, 2021) with no user identifiers of any kind; Double Ratchet + post-quantum key exchange; self-hostable relays, twice audited by Trail of Bits.
French E2EE messenger (Olvid SAS, Paris, founded 2019), ANSSI CSPN certified, mandated for French government ministers; no phone number/identifier, content + metadata encrypted.
FR
France
SOVEREIGNTY
A single roll-up of ownership and CLOUD Act exposure.
EU-SovereignEU/EEA/Switzerland-owned and -operated, with no identified CLOUD Act exposure.
EU-BasedThis listingEU-operated, with at most minor or transient US exposure.
EU-HostedEU hosting available, but a US parent or hyperscaler sub-processor creates material exposure.
US-LinkedOperated by a US-incorporated entity, directly subject to US jurisdiction.
UK-incorporated open-source E2EE messenger (SimpleX Chat Ltd, 2021) with no user identifiers of any kind; Double Ratchet + post-quantum key exchange; self-hostable relays, twice audited by Trail of Bits.
—
United Kingdom
SOVEREIGNTY
A single roll-up of ownership and CLOUD Act exposure.
EU-SovereignEU/EEA/Switzerland-owned and -operated, with no identified CLOUD Act exposure.
EU-BasedThis listingEU-operated, with at most minor or transient US exposure.
EU-HostedEU hosting available, but a US parent or hyperscaler sub-processor creates material exposure.
US-LinkedOperated by a US-incorporated entity, directly subject to US jurisdiction.
For every product we read the public DPA, sub-processors document, hosting region declaration, and corporate ownership records. Each is timestamped. Signals are editorial, re-verified quarterly. We never accept self-attestation.
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