Free social app for teams, families, and communities

Chat, calendar, mail, tasks, and calls in one place. Ivy, your AI secretary, helps with search, scheduling, and feedback—per group or in a dedicated secretary chat.

Main features

Group chat & DM — Text, images, files, and video. Mentions, reply quotes, TO targeting, reactions, and YouTube link previews. Shared media in conversations.
Integrated calendar — Native Social9 calendar for every user—no Google account required. Personal and group calendars. Optionally merge Google Calendar events in one view. Open from the top panel.
Social9 Mail — Free @social9.jp inbox plus secondary (registered) email. Unified inbox with external IMAP, reply, spam handling, and mailbox settings from the top panel.
Ivy (AI secretary) — In each group or a dedicated secretary chat: morning news, task/memo/log search, calendar assistance, shared-folder reading, conversation memory, and auto-reply. Also receives improvement requests, bug reports, complaints, and inquiries for the operator.
Organizations — Companies, groups, and families. Member invites (email, initial password, CSV bulk), groups, usage restrictions, and org admin UI in Japanese / English / Chinese.
Personal address book — Add friends via QR or invite email. Match device contacts or Excel/CSV to find members and invite to groups.
Tasks & memos — Create tasks from chat (multiple assignees), dedicated task/memo pages, reminders, and right-panel integration.
Shared folders & vault — Per-group file storage. Secure Vault protects sensitive notes with WebAuthn.
Voice & video calls — Browser calls via Jitsi. Incoming notifications and call settings.
Languages & translation — UI in Japanese, English, and Chinese. Manual and automatic message translation in chat.
More — Android app (push notifications, contact sync), PWA (add to home screen), Guild rewards, design settings, and in-organization search policies.

Use cases

Team and department updates, reports, and coordination
Shared calendars and group schedules; merge with Google when linked
Check and reply to @social9.jp mail from the top panel
Task requests and progress tracking (chat → tasks page)
Ask Ivy to summarize logs, search tasks/memoes, or manage calendar events
Family, neighborhood, club, and hobby group announcements
File sharing via group shared folders
Remote voice and video meetings
Org admins: members, groups, permissions, and usage limits

Social9 family — public services

Public services run by Social9. Browsing does not require login.

聖徳太子2.0 （Shotoku Taishi 2.0 / Broad Listening 合意形成AI掲示板） — AI broad-listening board that visualizes consensus across opinion groups (PCA + K-means + Group-Aware Consensus).
9ブログ （Nineblog / 公開メディア） — Public media: AI-drafted, human-edited articles and registered user posts.
九物語 （Kyumonogatari / Web小説） — Web novel platform where AI and humans co-create serialized fiction. Free to read without login.
イチ円動画 （Ichien-Video / 子ども向け教育動画） — AI-curated kid-friendly educational videos with summaries and quizzes. Parents can suggest topics.

Social9 is actively developed with AI assistance. Send improvement requests, bug reports, complaints, or inquiries to Ivy (AI secretary)—for example “contact operator” or “improvement request”. Messages are recorded for the operator. We generally do not accept direct email inquiries.

Ivy is still evolving. Do not rely on it alone for medical, legal, financial, or other critical decisions—verify important information yourself.

For company or neighborhood-association operations, we recommend a desktop or large screen rather than mobile only.

FAQ

What is Social9?

Social9 (Social Nine / ソーシャルナイン) is a free social app for group chat, DMs, integrated calendar, @social9.jp mail, tasks, memos, shared folders, a secure vault, and browser voice/video calls. Ivy, the AI secretary, works in each group or in a dedicated secretary chat. UI and org admin are available in Japanese, English, and Chinese. Designed for teams, families, neighborhood associations, clubs, and hobby groups.

What is Ivy (AI secretary)?

Ivy helps with morning news, searching tasks/memos/logs, calendar assistance, reading shared folders, conversation memory, and auto-reply. You can also send improvement requests, bug reports, complaints, or inquiries to the operator through Ivy (e.g. “contact operator”). Ivy is still evolving—verify important decisions yourself.

How do I contact the operator or send feedback?

Send a message to Ivy in chat, for example “contact operator”, “improvement request”, or “bug report”. Your message is recorded for the operator. We generally do not accept direct email inquiries.

Is Social9 free?

Yes. Creating an account and using group chat, calendar, mail, tasks, memos, and basic features is free. Public sister services (Shotoku Taishi 2.0, 9blog, Kyumonogatari, Ichien-Video) can also be browsed without login.

How do I sign up?

On the login page, sign in with Google (if enabled), or create a free @social9.jp account by choosing an ID and password — you are signed in right away. You can also register with your own email or phone number (SMS one-time code) on the registration page. After registration, create or join an organization and start chatting.

How is Social9 different from LINE or Slack?

Social9 combines messaging with integrated calendar and @social9.jp mail, organization management (CSV bulk invites, usage limits), per-group or dedicated Ivy chat, tasks/memos from chat, shared folders, WebAuthn vault, translation, PWA, Android app, and optional Jitsi calls in one place. It also links to public consensus and media apps (Shotoku 2.0, 9blog, etc.) operated by the same team.

Is my chat data private?

Chat rooms require login and are not listed on public search engines. Access is limited to members you invite. Please do not share passwords and review our Terms of Service and Privacy Policy before use.

Which languages are supported?

The app UI supports Japanese, English, and Chinese (Simplified). Organization admin screens also support these languages. Manual and automatic message translation is available in many chat views.

How do I request deletion of my account and data?

You can request deletion of your Social9 account and associated data by following the instructions on our dedicated page and emailing us. You do not need to be logged in. Go to account deletion page