Sogool vs Siabra

Sogool is a privacy-focused secure messenger that brings secure chat, private chat, video calls, voice calls, private notes, and file protection together in one app. No phone number, email registration, or separate account is required. Sogool is designed to keep conversations and personal data as device-centered as possible. P2P Secure Chat After the minimum signaling needed to establish the initial connection, Sogool secure chat allows users’ devices to communicate directly through P2P. Messages and files are encrypted on the sender’s device first and then sent directly to the other device. Chat content is not stored on Sogool’s service servers. The first one-to-one connection uses a 16-character secret key. Once the connection is established, the other person is registered as a secure friend on the device. After that, you can start a conversation from the secure-friends list without entering the secret key again. Video Calls · Voice Calls You can make video and voice calls with secure friends. Video and audio data are protected by WebRTC’s encrypted transport together with Sogool’s additional frame encryption. You do not need to open a chat room first. Choose a secure friend directly from the video-call or voice-call menu and start the call. Video and voice calls can be used without a separate limit on the number of calls. Private Notes Keep personal memos, journals, schedules, ideas, and other important records encrypted on your own device. Create and read notes without an internet connection. Sogool also supports image and file attachments, category management, and encrypted backup and restore. Private Notes work independently and do not require secure chat or a friend connection. File Protection Protect important photos, videos, documents, and other files with AES-256-based encryption on your device. Files are not uploaded to a Sogool server for encryption or decryption, and file protection can be used offline. Large files and a variety of file formats can also be encrypted and managed. Key Sogool Features • Secure messenger with no account registration • P2P secure chat and private chat • Encrypted video calls and voice calls • P2P direct transfer after encrypting messages and files • Chat content is not stored on Sogool service servers • First connection using a 16-character secret key • Secure-friend management • Private notes and secure notes • AES-256 file encryption • Offline notes and file protection • Encrypted backup and restore • Report and block features Sogool is designed to manage more than secure chat. Video calls, voice calls, personal records, and important files can all be handled in one app. Use a secure messenger without registration, P2P private chat, video calls, voice calls, private notes, and file protection together in Sogool. Using Sogool’s privacy features to violate the rights of others or break applicable laws is prohibited. Ads may appear on some screens to support operation of the service.

Siabra is a messenger whose private chats are protected by end-to-end encryption: a message is encrypted on your device and decrypted on your contact's. The keys never leave the phone — the server stores and forwards an opaque block and cannot read it. Not everything here is encrypted, and we say so plainly — here and in the app. WHAT THIS VERSION HAS • One-to-one chats with end-to-end encryption • Encrypted groups up to 256 members: roles, adding and removing, ownership transfer • Closed and open groups — no member limit and no encryption • Channels, closed and public: owner and admins post, everyone else reads. A public one is readable on the web without signing in; channels are not encrypted • Saved Messages — encrypted notes to yourself • Siabra, an AI assistant: everyone gets their own chat with it, unencrypted. It sees images you send, hears voice messages and draws on request • One-to-one audio and video calls • Image attachments — in encrypted chats and the assistant chat, up to 8 MiB per file • Stories that last a day: seen by your contacts and people you have written to; not by those you blocked • Voice messages up to five minutes • Notifications: your device puts the name and text together, not the server • Light and dark theme • Interface in seven languages, English among them WHAT IS ENCRYPTED AND WHAT IS NOT Encrypted: one-to-one chats, encrypted groups, Saved Messages and their attachments. Not encrypted: closed and open groups, channels, and the chat with the assistant. These messages are stored on the server in plain text, and reading them is technically possible if needed. "Closed" means an outsider cannot open the chat — not that it is encrypted. Which chat you are in is shown next to the input field, as you type. Everything you send the assistant — text, images, voice — also leaves our server for the model provider that prepares the reply, and attachments there are not encrypted. Nothing else goes there: no name, no phone number, not a single message from any other chat. HOW THE ENCRYPTION WORKS The session is established with X3DH; symmetric encryption is AES-256-GCM. All encrypted chats — one-to-one, group and Saved — use Sender Keys: every device has its own sender chain, and the chain key travels to the recipient in an envelope sealed to their key, so your chats open on all your devices. The price, plainly: unlike the Double Ratchet, this scheme does not heal itself after a key is stolen. Audio and video are encrypted between devices (DTLS-SRTP); the devices agree on the keys. The 256-member limit applies to encrypted groups only: the chain key goes to each member pairwise. Where there is no encryption there is no limit. WHAT ENCRYPTION DOES NOT HIDE We promise no anonymity: signing in requires a phone number. The server sees who wrote to whom and when, the size of the encrypted block, when a device was last online, group membership, and for calls — who called whom, how long. If a direct connection fails, the call goes through our relay: it does not hear the conversation, but sees both addresses and the data volume. If you turn on address book sync, the server keeps your contact list — who knows whom; only you turn it on, and turning it off erases it. All of this is in the privacy policy: siabra.by/privacy.html LIMITS WE PREFER TO SAY UP FRONT • Group membership is confirmed by the server, not by encryption — check the member list yourself. • Someone removed from a group can still decrypt messages already received — they got those keys legitimately as a member. Chain rotation cuts off only new ones. • Saved Messages are encrypted with this device's keys: your notes won't open on another device. • No calls in groups or channels, and the assistant cannot be called.