VoidSend vs StipaCaller

VoidSend is a zero-knowledge encrypted messenger built for a post-quantum world. Every message, file, and call is encrypted on your device before it ever leaves — our servers act as a blind relay, mathematically unable to decrypt your data. ZERO-KNOWLEDGE ARCHITECTURE Unlike other messengers that promise privacy, VoidSend's Blind Relay design means the server only ever sees encrypted blobs. No plaintext. No metadata leaks. Your encryption keys never leave your device. POST-QUANTUM ENCRYPTION VoidSend uses hybrid encryption combining X25519 with ML-KEM-768 (Kyber), protecting your conversations against both today's threats and tomorrow's quantum computers. Messages are sealed with AES-256-GCM, and identities are verified with ML-DSA-65 post-quantum signatures. MESSAGING • End-to-end encrypted direct and group messages • Disappearing messages (5 seconds to 7 days) • Encrypted file sharing with automatic 24-hour server-side deletion • Emoji reactions, replies, and typing indicators • Message search across your conversation history VOICE & VIDEO CALLS • Peer-to-peer WebRTC audio and video calls • Optional post-quantum encrypted media streams • Call history WEB3 PAYMENTS (Only available on www.voidsend.xyz) • Built-in multi-chain wallet: Ethereum, Base, and Solana • Send and receive ETH, USDC, USDT, SOL, and SPL tokens • Wallet derived from your encryption seed — one identity, one key PASSWORDLESS AUTHENTICATION • Sign in with your crypto wallet (EIP-712 signature) • Or use Face ID / Touch ID with Passkeys • No email. No phone number. No passwords. Just you. STORIES & PROFILES • Share ephemeral photos and videos with your contacts • Custom avatars and usernames • Online status visible only to mutual contacts PRIVACY BY DESIGN • No data collection beyond your username and encrypted data • Block contacts and control who can message you • Cross-platform: your encrypted identity syncs seamlessly across all your devices VoidSend doesn't ask you to trust us — it's built so you don't have to.

StipaCaller is a small messenger for families, made in Finland, EU, by Lesti Software Oy. Your data is stored in Finland, and your messages are end-to-end encrypted, so even we can't read them. Call and write to the people closest to you — parents, grandparents, children — wherever they live. It's simple enough for grandparents: answer a call, look at a photo, send a voice message. Private by design • Messages, photos and calls are end-to-end encrypted: only you and the people you're talking to can read and hear them, not us. • No phone number needed: everyone picks a username. • No ads, no tracking, no analytics, and no address-book upload. • Notifications never contain the text of your messages; messages are decrypted on your phone. What you can do • Voice and video calls • Messages, photos, videos and voice messages • Family group chats • See when a call can't get through, or the other phone is on silent, and leave a message instead • Missed-call notifications with one-tap call back For your whole family Start a family in the app and invite your relatives with a link or a QR code. The first 7 days are free from when your first relative joins; after that, one monthly subscription covers you and up to 5 family members. Already invited? Just tap the link you received. Permissions • Microphone: for calls and voice messages • Camera: for video calls and the photos you choose to send • Notifications: for incoming calls and messages Terms of Use: https://stipacaller.lestisoftware.fi/eula.html Privacy Policy: https://stipacaller.lestisoftware.fi/privacy.html