SimpleX Chat: secure messenger
社交
僅適用於 iPhone
免費
SimpleX - the first messaging network without user identifiers of any kind (not even random numbers) - 100% private by design!
Security assessments by Trail of Bits:
2022: https://simplex.chat/blog/20221108-simplex-chat-v4.2-security-audit-new-website.html
2024: https://simplex.chat/blog/20241014-simplex-network-v6-1-security-review-better-calls-user-experience.html
SimpleX Chat features:
- quantum resistant end-to-end encrypted messages, with editing, replies and deletion.
- disappearing messages with opt-out per contact/group.
- message reactions.
- delivery receipts, with opt-out per contact or group.
- multiple chat profiles, with hidden profiles.
- app access and self-destruct passcodes.
- incognito mode - unique to SimpleX Chat.
- end-to-end encrypted images and files.
- voice messages up to 5 minutes – also end-to-end encrypted.
- "live" messages – they update for all recipients as you type them, every few seconds - unique to SimpleX Chat.
- connect via one-time invitation links or via long-term public addresses.
- secret chat groups - only group members know the group exists and who is the member.
- end-to-end encrypted audio and video calls.
- connection security code verification, for contacts and group members – to protect from man-in-the-middle attacks (e.g. invitation link substitution).
- end-to-end encrypted push notifications (they contain only encrypted meta-data, not the actual content).
- encrypted portable chat database - you can transfer your chat contacts and history to another device.
- all local files and media are encrypted by default.
- animated images and "stickers" (e.g., from GIF and PNG files and from 3rd party keyboards).
SimpleX Chat advantages:
- privacy of your identity, profile, contacts and metadata: unlike any other existing messaging platform, SimpleX uses no phone numbers or any other identifiers assigned to the users - not even random numbers. This protects the privacy of who you are communicating with, hiding it from SimpleX platform servers and from any observers.
- complete protection against spam and abuse: as you have no identifier on SimpleX platform, you cannot be contacted unless you share a one-time invitation link or an optional temporary user address.
- full ownership, control and security of your data: SimpleX stores all user data on client devices, the messages are only held temporarily on SimpleX relay servers until they are received.
- decentralized proxied peer-to-peer network: you can use SimpleX Chat via your own relay servers and still communicate with people using pre-configured or any other SimpleX relay servers.
- fully open-source code.
You can connect to anybody you know via link or scan QR code (in the video call or in person) and start sending messages instantly - no emails, phone numbers or passwords needed.
Your profile and contacts are only stored in the app on your device - relay servers do not have access to this information.
All messages are end-to-end encrypted using open-source quantum resistant double-ratchet protocol; the messages are delivered via relay servers using open-source SimpleX Messaging Protocol.
Please send us any questions via the app (connect to the team via the app settings!), email chat@simplex.chat or submit issues on GitHub (https://github.com/simplex-chat/simplex-chat/issues)
Ream more about SimpleX Chat at https://simplex.chat
Get source code in our GitHub repo: https://github.com/simplex-chat/simplex-chat
Follow us on X/Twitter (@SimpleXChat), Reddit (r/SimpleXChat/) and Mastodon (https://mastodon.social/@simplex) for the latest updates.
更多 New in v6.5-6.5.6.
Public channels - speak freely!
- Reliability: many relays per channel.
- Ownership: you can run your own relays.
- Security: owners hold channel keys.
- Privacy: for owners and subscribers.
Easier to invite your friends: we made connecting simpler for new users.
Safe web links:
- opt-in to send link previews.
- prevent hyperlink phishing.
- remove link tracking.
Non-profit governance: to make SimpleX Network last.
Read more: https://simplex.chat/blog/20260430-simplex-channels-v6-5-consortium-crowdfunding-freedom-of-speech.html
6.5.6 6月24日
New in v6.5-6.5.5.
Public channels - speak freely!
- Reliability: many relays per channel.
- Ownership: you can run your own relays.
- Security: owners hold channel keys.
- Privacy: for owners and subscribers.
Easier to invite your friends: we made connecting simpler for new users.
Safe web links:
- opt-in to send link previews.
- prevent hyperlink phishing.
- remove link tracking.
Non-profit governance: to make SimpleX Network last.
Read more: https://simplex.chat/blog/20260430-simplex-channels-v6-5-consortium-crowdfunding-freedom-of-speech.html
6.5.5 6月19日
New in v6.5-6.5.4.
Public channels - speak freely!
- Reliability: many relays per channel.
- Ownership: you can run your own relays.
- Security: owners hold channel keys.
- Privacy: for owners and subscribers.
Easier to invite your friends: we made connecting simpler for new users.
Safe web links:
- opt-in to send link previews.
- prevent hyperlink phishing.
- remove link tracking.
Non-profit governance: to make SimpleX Network last.
Read more: https://simplex.chat/blog/20260430-simplex-channels-v6-5-consortium-crowdfunding-freedom-of-speech.html
6.5.4 6月4日
New in v6.5-6.5.3.
Public channels - speak freely!
- Reliability: many relays per channel.
- Ownership: you can run your own relays.
- Security: owners hold channel keys.
- Privacy: for owners and subscribers.
Easier to invite your friends: we made connecting simpler for new users.
Safe web links:
- opt-in to send link previews.
- prevent hyperlink phishing.
- remove link tracking.
Non-profit governance: to make SimpleX Network last.
Read more: https://simplex.chat/blog/20260430-simplex-channels-v6-5-consortium-crowdfunding-freedom-of-speech.html
6.5.3 5月27日
New in v6.5-6.5.2.
Public channels - speak freely!
- Reliability: many relays per channel.
- Ownership: you can run your own relays.
- Security: owners hold channel keys.
- Privacy: for owners and subscribers.
Easier to invite your friends: we made connecting simpler for new users.
Safe web links:
- opt-in to send link previews.
- prevent hyperlink phishing.
- remove link tracking.
Non-profit governance: to make SimpleX Network last.
New in v6.5.2: channel owners can delete messages from history without time limit.
Read more: https://simplex.chat/blog/20260430-simplex-channels-v6-5-consortium-crowdfunding-freedom-of-speech.html
6.5.2 5月15日
New in v6.5-6.5.1.
Public channels - speak freely!
- Reliability: many relays per channel.
- Ownership: you can run your own relays.
- Security: owners hold channel keys.
- Privacy: for owners and subscribers.
Easier to invite your friends: we made connecting simpler for new users.
Safe web links:
- opt-in to send link previews.
- prevent hyperlink phishing.
- remove link tracking.
Non-profit governance: to make SimpleX Network last.
Read more: https://simplex.chat/blog/20260430-simplex-channels-v6-5-consortium-crowdfunding-freedom-of-speech.html
6.5.1 5月4日
New in v6.5.
Public channels - speak freely!
- Reliability: many relays per channel.
- Ownership: you can run your own relays.
- Security: owners hold channel keys.
- Privacy: for owners and subscribers.
Easier to invite your friends: we made connecting simpler for new users.
Safe web links:
- opt-in to send link previews.
- prevent hyperlink phishing.
- remove link tracking.
Non-profit governance: to make SimpleX Network last.
Read more: https://simplex.chat/blog/20260430-simplex-channels-v6-5-consortium-crowdfunding-freedom-of-speech.html
6.5 4月30日
New in v6.4-6.4.11
- new UX to connect.
- review new group members ("knocking").
- chat with group admins.
- approve contact requests from group members.
- UI support for bot commands.
- support markdown hyperlinks, e.g.: [click here](https://example.com).
- option to remove tracking parameters from the links.
- improved message delivery.
v6.4.11:
- improve error handling.
Read more: https://simplex.chat/blog/20250729-simplex-chat-v6-4-1-welcome-contacts-protect-groups-app-security.html
6.4.11 3月30日
New in v6.4-6.4.10
- new UX to connect.
- review new group members ("knocking").
- chat with group admins.
- approve contact requests from group members.
- UI support for bot commands.
- support markdown hyperlinks, e.g.: [click here](https://example.com).
- option to remove tracking parameters from the links.
- improved message delivery.
v6.4.10:
- improve error handling.
Read more: https://simplex.chat/blog/20250729-simplex-chat-v6-4-1-welcome-contacts-protect-groups-app-security.html
6.4.10 1月31日
New in v6.4-6.4.9:
- new UX to connect.
- review new group members ("knocking").
- chat with group admins.
- approve contact requests from group members.
- UI support for bot commands.
- support markdown hyperlinks, e.g.: [click here](https://example.com).
- option to remove tracking parameters from the links.
- improved message delivery.
v6.4.9:
- fix dialog for connecting to other users closing on iOS 26.
Read more: https://simplex.chat/blog/20250729-simplex-chat-v6-4-1-welcome-contacts-protect-groups-app-security.html
6.4.9 1月8日
New in v6.4-6.4.8:
- new UX to connect.
- review new group members ("knocking").
- chat with group admins.
- approve contact requests from group members.
- UI support for bot commands.
- support markdown hyperlinks, e.g.: [click here](https://example.com).
- option to remove tracking parameters from the links.
- improved message delivery.
v6.4.8:
- reduce memory usage when sharing to SimpleX Chat.
Read more: https://simplex.chat/blog/20250729-simplex-chat-v6-4-1-welcome-contacts-protect-groups-app-security.html
6.4.8 2025/12/14
New in v6.4-6.4.7:
- new UX to connect.
- review new group members ("knocking").
- chat with group admins.
- approve contact requests from group members.
- UI support for bot commands.
- support markdown hyperlinks, e.g.: [click here](https://example.com).
- option to remove tracking parameters from the links.
- improved message delivery.
v6.4.7:
- fixes compatibility with iOS 26.1.
- fixes export of database larger than 4gb.
Read more: https://simplex.chat/blog/20250729-simplex-chat-v6-4-1-welcome-contacts-protect-groups-app-security.html
6.4.7 2025/11/04
New in v6.4-6.4.6:
- new UX to connect.
- review new group members ("knocking").
- chat with group admins.
- approve contact requests from group members.
- UI support for bot commands.
- support markdown hyperlinks, e.g.: [click here](https://example.com).
- option to remove tracking parameters from the links.
- improved message delivery.
v6.4.6 has fixes for opening SimpleX links from outside of the app.
Read more: https://simplex.chat/blog/20250729-simplex-chat-v6-4-1-welcome-contacts-protect-groups-app-security.html
6.4.6 2025/10/07
New in v6.4-6.4.5:
- new UX to connect.
- review new group members ("knocking").
- chat with group admins.
- approve contact requests from group members.
- UI support for bot commands.
- support markdown hyperlinks, e.g.: [click here](https://example.com).
- option to remove tracking parameters from the links.
- improved message delivery.
v6.4.5 has fixes for chats with group admins.
Read more: https://simplex.chat/blog/20250729-simplex-chat-v6-4-1-welcome-contacts-protect-groups-app-security.html
6.4.5 2025/09/12
New in v6.4-6.4.4:
- new UX to connect.
- review new group members ("knocking").
- chat with group admins.
- approve contact requests from group members.
- UI support for bot commands.
- support markdown hyperlinks, e.g.: [click here](https://example.com).
- option to remove tracking parameters from the links.
- improved message delivery.
v6.4.4 has fixes and small improvements.
Read more: https://simplex.chat/blog/20250729-simplex-chat-v6-4-1-welcome-contacts-protect-groups-app-security.html
6.4.4 2025/08/28
New in v6.4.3:
- UI support for bot commands.
- support markdown hyperlinks, e.g.: [click here](https://example.com).
- option to remove tracking parameters from the links.
New in v6.4-6.4.1:
- new UX to connect.
- review new group members ("knocking").
- chat with group admins.
- approve contact requests from group members.
- improved message delivery.
Read more: https://simplex.chat/blog/20250729-simplex-chat-v6-4-1-welcome-contacts-protect-groups-app-security.html
6.4.3 2025/08/12
New in v6.4.2:
- manually accept member contact requests, with option to auto-accept.
- ignore contact requests from blocked group members.
- support links and colors in profile bio/group purpose.
New in v6.4-6.4.1:
- new UX to connect.
- review new group members ("knocking").
- chat with group admins.
- improved message delivery.
Read more: https://simplex.chat/blog/20250729-simplex-chat-v6-4-1-welcome-contacts-protect-groups-app-security.html
6.4.2 2025/08/04
New in v6.4.1:
- welcome your contacts: set profile bio and welcome message.
- enable disappearing messages by default for new contacts.
- short SimpleX addresses and group links now include profile images and welcome messages.
Read more: https://simplex.chat/blog/20250729-simplex-chat-v6-4-1-welcome-contacts-protect-groups-app-security.html
6.4.1 2025/07/29
New in v6.4:
- Connect faster: message instantly once you tap Connect.
- Review group members: chat with new members before they join.
- Chat with admins: send your private feedback to group owners.
- New group role: Moderator - can remove messages and block members.
- Improved message delivery - less traffic on mobile networks.
Read about the new UX for making connections in the blog post: https://simplex.chat/blog/20250703-simplex-network-protocol-extension-for-securely-connecting-people.html
6.4 2025/07/15
New in v6.3.1-7
- fixed changing the user profile of the invitation link.
- many improvements and fixes for push notifications.
- better "secrets" in messages - send them with #secret# markdown.
- support joining groups with "knocking" (admins can enable it in v6.4-beta).
- support short connection links (BETA).
- UI improvements.
New in v6.3
Better groups
- Mention members and get notified when mentioned.
- Send private reports to moderators.
- Faster sending messages and faster deletion.
Better chat navigation
- Organize chats into lists to keep track of what's important.
- Jump to found and forwarded messages.
Better privacy and security
- Private media file names.
- Message expiration in chats.
Read more: https://simplex.chat/blog/20250308-simplex-chat-v6-3-new-user-experience-safety-in-public-groups.html
6.3.7 2025/07/07
New in v6.3.1-6
- many improvements and fixes for push notifications.
- better "secrets" in messages - send them with #secret# markdown.
- support joining groups with "knocking" (admins can enable it in v6.4-beta).
- support short connection links (BETA).
- UI improvements.
New in v6.3
Better groups
- Mention members and get notified when mentioned.
- Send private reports to moderators.
- Faster sending messages and faster deletion.
Better chat navigation
- Organize chats into lists to keep track of what's important.
- Jump to found and forwarded messages.
Better privacy and security
- Private media file names.
- Message expiration in chats.
Read more: https://simplex.chat/blog/20250308-simplex-chat-v6-3-new-user-experience-safety-in-public-groups.html
6.3.6 2025/06/15
New in v6.3.1-5
- many improvements and fixes for push notifications.
- better "secrets" in messages - send them with #secret# markdown.
- support joining groups with "knocking" (admins can enable it in v6.4-beta).
- support short connection links (BETA).
- UI improvements.
New in v6.3
Better groups
- Mention members and get notified when mentioned.
- Send private reports to moderators.
- Faster sending messages and faster deletion.
Better chat navigation
- Organize chats into lists to keep track of what's important.
- Jump to found and forwarded messages.
Better privacy and security
- Private media file names.
- Message expiration in chats.
Read more: https://simplex.chat/blog/20250308-simplex-chat-v6-3-new-user-experience-safety-in-public-groups.html
6.3.5 2025/06/10
New in v6.3.1-4
- many improvements and fixes for push notifications.
- better "secrets" in messages - send them with #secret# markdown.
- support joining groups with "knocking" (admins can enable it in v6.4-beta).
- support short connection links (BETA).
New in v6.3
Better groups
- Mention members and get notified when mentioned.
- Send private reports to moderators.
- Faster sending messages and faster deletion.
Better chat navigation
- Organize chats into lists to keep track of what's important.
- Jump to found and forwarded messages.
Better privacy and security
- Private media file names.
- Message expiration in chats.
Read more: https://simplex.chat/blog/20250308-simplex-chat-v6-3-new-user-experience-safety-in-public-groups.html
6.3.4 2025/05/13
New in v6.3.1-3
- improved chat navigation.
- support short connection links (BETA).
New in v6.3
Better groups
- Mention members and get notified when mentioned.
- Send private reports to moderators.
- Faster sending messages and faster deletion.
Better chat navigation
- Organize chats into lists to keep track of what's important.
- Jump to found and forwarded messages.
Better privacy and security
- Private media file names.
- Message expiration in chats.
Read more: https://simplex.chat/blog/20250308-simplex-chat-v6-3-new-user-experience-safety-in-public-groups.html
6.3.3 2025/04/25
New in v6.3.1-2
- improved chat navigation.
New in v6.3
Better groups
- Mention members and get notified when mentioned.
- Send private reports to moderators.
- Faster sending messages and faster deletion.
Better chat navigation
- Organize chats into lists to keep track of what's important.
- Jump to found and forwarded messages.
Better privacy and security
- Private media file names.
- Message expiration in chats.
Read more: https://simplex.chat/blog/20250308-simplex-chat-v6-3-new-user-experience-safety-in-public-groups.html
6.3.2 2025/04/16
New in v6.5-6.5.6.
Public channels - speak freely!
- Reliability: many relays per channel.
- Ownership: you can run your own relays.
- Security: owners hold channel keys.
- Privacy: for owners and subscribers.
Easier to invite your friends: we made connecting simpler for new users.
Safe web links:
- opt-in to send link previews.
- prevent hyperlink phishing.
- remove link tracking.
Non-profit governance: to make SimpleX Network last.
Read more: https://simplex.chat/blog/20260430-simplex-channels-v6-5-consortium-crowdfunding-freedom-of-speech.html
更多 版本 6.5.6 6月24日
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