Secure messaging comparison: SANKET and the alternatives
SANKET (Sanket.Chat) by Tosh Defence is the sovereign choice for organisations: Signal Protocol with post-quantum PQXDH and SPQR, AES-256 everywhere, and the depth of customer control that hosted messaging services are not built to offer. Whether you are looking for a WhatsApp alternative, a Signal alternative or an Indian messaging platform, this secure messaging comparison sets SANKET beside eleven alternatives, fact by fact.
SANKET and eleven alternatives at a glance
| Platform | Vendor country | Deployment | Protocol | Post-quantum messaging | Customer identity provider | Full comparison |
|---|---|---|---|---|---|---|
| SANKET | India | Dedicated cloud, on-premise or air-gapped, customer-controlled | Signal Protocol (official libsignal), AES-256 | Yes: PQXDH and SPQR | OIDC, SAML 2.0, LDAP, SCIM | Whitepaper |
| Arattai | India | Zoho-operated service | Not publicly documented | Not publicly documented | Not publicly documented | SANKET vs Arattai |
| Sandes | India | Government-hosted | Not publicly documented | Not publicly documented | NIC email, DigiLocker, e-Office integrations | SANKET vs Sandes |
| Signal | USA | Signal-operated service | Signal Protocol | Yes: PQXDH; SPQR rolling out | Not publicly documented | SANKET vs Signal |
| USA | Meta-operated service | Signal Protocol, Sender Keys for groups | Not publicly documented | Not publicly documented | SANKET vs WhatsApp | |
| Telegram | UAE | Telegram-operated service | MTProto 2.0 | Not publicly documented | Not publicly documented | SANKET vs Telegram |
| Wire | Switzerland | Cloud, private cloud, on-premises, air-gapped | MLS | Not publicly documented | SAML SSO, SCIM | SANKET vs Wire |
| Rocket.Chat | Brazil | On-premises, air-gapped, private or hosted cloud | Not publicly documented | On the vendor's roadmap | LDAP, SAML, OpenID Connect | SANKET vs Rocket.Chat |
| Element / Matrix | United Kingdom | Self-hosted or managed; air-gapped cross-domain | Olm / Megolm (Matrix) | Not publicly documented | OIDC, LDAP, SAML, SCIM (ESS Pro) | SANKET vs Element / Matrix |
| Private Discuss | France | On-premise, private cloud or SaaS | Not publicly documented | Not publicly documented | Not publicly documented | SANKET vs Private Discuss |
| Threema | Switzerland | Hosted, or OnPrem including air-gapped | Ibex | Planned (announced February 2026) | Not publicly documented | SANKET vs Threema |
| SalaX Secure Messaging | Finland | SaaS, on-premises, private cloud, air-gapped | Matrix (Olm / Megolm), AES-256 | Not publicly documented | SSO, MFA, bank ID | SANKET vs SalaX Secure Messaging |
Choose a comparison
India
Indian WhatsApp alternative for organisations
SANKET, Arattai, Sandes and WhatsApp compared for Indian organisations.
India
SANKET vs Arattai: secure Indian messaging compared
SANKET vs Arattai: two Indian messaging platforms compared on control, deployment, post-quantum encryption and governance. An Arattai alternative for teams.
India
SANKET vs Sandes: a Sandes alternative any organisation can run
SANKET vs the Sandes app: compare deployment, identity, post-quantum encryption and governance. A Sandes alternative any Indian organisation can run itself.
USA
SANKET vs Signal: the Signal alternative for organisations
A Signal alternative for organisations: SANKET runs Signal's libsignal with post-quantum PQXDH and SPQR on your own infrastructure, identity and update control.
USA
SANKET vs WhatsApp: a sovereign WhatsApp alternative
SANKET vs WhatsApp for organisations: Signal Protocol with post-quantum protection, your own servers, identity provider, retention policy and device control.
United Arab Emirates (development team based in Dubai)
SANKET vs Telegram: secure messaging compared
SANKET vs Telegram: every SANKET chat, group, file and call is end-to-end encrypted with Signal Protocol and post-quantum protection, on servers you control.
Switzerland
SANKET vs Wire: a Wire alternative with post-quantum Signal Protocol
A Wire alternative with Signal Protocol, post-quantum PQXDH and SPQR, AES-256 everywhere and air-gapped deployment, built in India. Compare SANKET and Wire.
Brazil (offices in the USA and Europe)
SANKET vs Rocket.Chat: secure team messaging compared
SANKET vs Rocket.Chat: end-to-end encryption by design with Signal Protocol, post-quantum protection, device mutual TLS and air-gapped deployment you control.
United Kingdom
SANKET vs Element (Matrix): secure messaging compared
SANKET vs Element and Matrix: Signal Protocol with post-quantum PQXDH and SPQR, per-device group encryption and device governance in a dedicated installation.
France
SANKET vs Private Discuss: sovereign secure messaging compared
SANKET vs Private Discuss: Signal's audited libsignal with post-quantum PQXDH and SPQR, AES-256 throughout and air-gapped deployment, built in India.
Switzerland
SANKET vs Threema: a Threema alternative for sovereign organisations
A Threema alternative for organisations: SANKET adds post-quantum PQXDH and SPQR, your own identity provider and signed device lists, built in India.
Finland
SANKET vs SalaX Secure Messaging compared
SANKET vs SalaX Secure Messaging: Signal Protocol with post-quantum PQXDH and SPQR, AES-256 on every layer and air-gapped deployment, built in India.
Frequently asked questions
What is the most secure messaging platform for organisations?
For organisations that need control as well as encryption, SANKET (Sanket.Chat) by Tosh Defence combines Signal Protocol with post-quantum PQXDH and SPQR, AES-256 everywhere and a dedicated installation on infrastructure the organisation owns, from cloud to fully air-gapped.
What is the best WhatsApp alternative for organisations?
SANKET. It offers familiar messaging, groups, files and calls with Signal Protocol and post-quantum protection, while the organisation keeps its own servers, identity provider, retention policy and device governance.
What is the best Signal alternative for organisations?
SANKET uses Signal's own libsignal with PQXDH and SPQR, and adds what an organisation needs: its own installation and jurisdiction, sign-in through its own directory, signed device lists, device mutual TLS and update control.
How were these comparisons made?
Every competitor fact comes from the vendor's own documentation or reputable published sources, checked on 7 October 2026 and listed on each page. Where no public source was found, the page says 'Not publicly documented'. SANKET facts come from its public security whitepaper.
Sources
Each comparison page lists the sources for every competitor fact in its table.
Sources checked on 7 October 2026. Competitor facts are taken only from the sources listed. Where no public source was found, the cell reads 'Not publicly documented'. Product and company names are trademarks of their respective owners.
Put your communications under your own control
Talk to the Tosh Defence team about your deployment, from a dedicated cloud installation to a fully air-gapped estate, or read the full security architecture first.