ISI

Your inner circle, on ISI. ISI (Instant Social Interaction) is an independent, invite-only messenger for friends and family. Nobody can find you, add you or message you unless someone already on ISI invites you. NO EMAIL, NO PHONE NUMBER Join with an invitation code or QR code, choose a username and a password, and you're in. ISI never asks for your email address, phone number or contacts. STAY IN TOUCH • Text, photos, videos, files and voice notes • Group chats with admins, photos and descriptions • Voice and video calls, one to one or as a group • Polls, replies, reactions, mentions and starred messages • Disappearing messages and view-once photos • Delivered and read marks, with a privacy switch INVITE-ONLY, BY DESIGN Every member can invite the people they know with a single-use code, link or QR — there is no public sign-up and no way for strangers to reach you. Block and report controls are one tap away. CALM DESIGN A forest-green and brass look, native on iPhone and iPad, with light, dark and system appearance. ISI is an independent app for friends and family. It is not affiliated with any government or agency. Messages are protected by server access controls and encrypted in transit; they are not end-to-end encrypted.