Best Open Source Messenger Apps

181+ iOS apps curated and reviewed

4.2 avg rating
20 free apps
Updated June 2026

The best open source messenger apps on iPhone average 4.2β˜… across 181+ titles β€” we've ranked them by what real users actually keep on their phones. Updated June 2026.

Top Picks for Open Source Messenger

Signal - Private Messenger#1

Signal - Private Messenger by Signal Messenger, LLC

Wir leben Datenschutz.
Editor's Choice
🌐 Social Networking
4.7😊(1.1M ratings)
FreeIn-App Purchases
#11in Social Networking
Signal - Private Messenger screenshot 1
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Signal - Private Messenger screenshot 5
Signal - Private Messenger screenshot 6

This messaging app prioritizes your privacy with strong end-to-end encryption for all communications. It offers free text, voice, and video messaging, including group chats and disappearing stories, all without collecting your data.

What We Love

  • πŸ”’ Security and privacy
  • πŸ‘ Ease of use
  • πŸš€ Great call quality
  • πŸš€ Smooth and pleasant user interface

Room to Improve

  • πŸ› Delayed message delivery
  • πŸ› Inconsistent image/video quality
  • πŸ› Buggy call functionality
Session - Private Messenger#2

Session - Private Messenger by Rangeproof PTY LTD

Privacy you can trust
Strong Contender
🌐 Social Networking
4.2😐(3.4K ratings)
Free
Session - Private Messenger screenshot 1
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Session - Private Messenger screenshot 6

This secure messenger prioritizes your privacy with a decentralized network and end-to-end encryption. It offers anonymous account creation, IP address protection, and private group chats without collecting any metadata. Share messages and files with confidence, knowing your communications are truly private.

What We Love

  • πŸ”’ Secure and private messaging
  • πŸ‘ Clean and intuitive user interface
  • πŸš€ Fast and responsive
  • πŸ”’ No phone number or personal data required

Room to Improve

  • πŸ› Unreliable notifications and message delivery
  • πŸ› Frequent crashes and bugs
  • πŸ› Slow media file transfers
Telegram Messenger#3

Telegram Messenger by Telegram FZ-LLC

Fast. Secure. Powerful.
Worth Considering
🌐 Social Networking
4.0😊(272K ratings)
FreeIn-App Purchases
#3in Social Networking
Telegram Messenger screenshot 1
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Telegram Messenger screenshot 6

A fast, secure, and powerful instant messaging app synced across all devices. It offers unlimited media and file sharing, robust encryption, and extensive group chat capabilities. Enjoy a simple, private, and customizable communication experience.

What We Love

  • πŸš€ Fast and efficient
  • πŸ”’ Secure and private
  • πŸ‘ Customizable and user-friendly
  • πŸ’‘ Innovative features like channels and bots

Room to Improve

  • πŸ› Buggy and unstable at times
  • πŸ”‹ Battery life issues
  • 🚫 Lack of video calling feature

More Open Source Messenger apps to explore

4
Tele Messenger Chat Secure
Tele Messenger Chat Secure
Tele Messenger Chat Secure
Private Messenger Every Day.
Free

This UNOFFICIAL messaging app uses the Telegram API for fast, secure, and synced communication across devices. It offers advanced customization, enhanced message management, and internal proxy support for a stable connection. Enjoy free messaging, voice, and video calls with a strong focus on privacy.

Secure end-to-end encrypted messagingAdvanced interface customizationFree voice and video calls
πŸ”§ Utilities
(562)
free with in-app purchases
5
nandbox Messenger:Chat & Calls
nandbox Messenger:Chat & Calls
nandbox Messenger:Chat & Calls
Video calls, Chat, & Channels
Free

This messaging app offers enhanced privacy and communication features. Enjoy multiple profiles, large group chats, and interactive channels for community building. It also allows message editing and recall for better control over your conversations.

Multiple profilesInteractive channelsLarge group chats (up to 10,000 members)
🌐 Social Networking
(1.5K)
free
6
WhatsApp Messenger
WhatsApp Messenger
WhatsApp Messenger
Simple. Reliable. Private.
Free

Connect with friends and family globally through private messaging and high-quality calls. Share moments, documents, and stay in touch across devices, even on slow connections. Your conversations are secured with end-to-end encryption.

End-to-end encrypted messagingHigh-quality voice and video callsGroup chats and calls
🌐 Social Networking
(18M)
free with in-app purchases
7
ChatSecure Messenger
ChatSecure Messenger
ChatSecure Messenger
Encrypted Messenger
Free

This free and open source messaging app provides secure, end-to-end encrypted conversations using OTR and OMEMO over the XMPP protocol. It offers interoperability with other XMPP clients and uses well-known cryptographic libraries for privacy.

OTR encryptionOMEMO encryptionXMPP protocol
🌐 Social Networking
(283)
free with in-app purchases
8
Web Messenger - Dual Chat
Web Messenger - Dual Chat
Web Messenger - Dual Chat
Dual App For Parallel Space
Free

Easily manage multiple chat accounts on a single device. Access web chat, use dual accounts in parallel, and connect quickly with phone number login. Securely back up important conversations for peace of mind.

Dual chat accountsParallel space supportPhone number login
🌐 Social Networking
(3.2K)
free with in-app purchases
9
KakaoTalk : Messenger
KakaoTalk : Messenger
KakaoTalk : Messenger
For every user. For easy use.
Free

Connect with friends, family, and colleagues through instant messaging, voice and video calls, and file sharing. Organize conversations with folders and threads, and discover communities through Open Chat. Enhance your profile and enjoy AI features.

Instant messaging and group chatsVoice and video calls with screen sharingFile and photo sharing
🌐 Social Networking
(35K)
free with in-app purchases
10
Rocket.Chat
Rocket.Chat
Rocket.Chat
The Secure CommsOSβ„’
Free

A secure communication platform that integrates messaging, voice, video, and AI for organizations requiring high security and compliance. It offers features like E2E encryption and two-factor authentication to protect sensitive communications.

Unified messaging, voice, and videoEnd-to-end encryptionTwo-factor authentication
πŸ’Ό Business
(3.7K)
free
11
SimpleX Chat: secure messenger
SimpleX Chat: secure messenger
SimpleX Chat: secure messenger
Privacy redefined: no user IDs
Free

This secure messaging app offers unparalleled privacy by eliminating user identifiers. Enjoy end-to-end encrypted messages, calls, and files with features like disappearing messages and incognito mode. Connect via invitation links without needing phone numbers or emails.

No user identifiersEnd-to-end encrypted messagesDisappearing messages
🌐 Social Networking
(255)
free
12
iMe: Telegram AI Messenger
iMe: Telegram AI Messenger
iMe: Telegram AI Messenger
Next-level AI chats
Free

This app combines secure messaging with a powerful AI assistant. Get answers, generate content, translate conversations, and manage your chats efficiently. It offers advanced privacy features and personalization options.

AI Assistant for questions and content generationImage generation from textAccess to multiple AI models (ChatGPT, Gemini, Claude, Grok)
🌐 Social Networking
(8.5K)
free with in-app purchases
13
Messenger AI for WA & More
Messenger AI for WA & More
Messenger AI for WA & More
Unite Chats, Simplify Life
Free

Consolidate WhatsApp, Telegram, and Line chats into one app. Features AI-powered translation, note-taking, chat analysis, and response generation for enhanced communication.

Integrates WhatsApp, Telegram, and Line WebMultiple accounts on one deviceReal-time AI translation (50+ languages)
🌐 Social Networking
(2.5K)
freemium
14
Monal β€” XMPP Chat
Monal β€” XMPP Chat
Monal β€” XMPP Chat
Open source XMPP Messenger
Free

This open-source messenger provides a fast and user-friendly way to connect to the XMPP public chat network. Enjoy private, ad-free communication with end-to-end encryption and features like group chats and file sharing.

Open SourceNo AdsOMEMO encrypted chat
🌐 Social Networking
(133)
free
15
Messenger Web
Messenger Web
Messenger Web
Use WhatsApp and Telegram Web
Free

Access WhatsApp and Telegram via a web browser interface on your device. Manage multiple messaging accounts without needing separate phones. Offers daily quotes and status messages.

Access WhatsApp WebAccess Telegram WebManage multiple accounts
🌐 Social Networking
(700)
subscription
16
Delta Chat
Delta Chat
Delta Chat
Decentral Private Messenger
Free

This decentralized messenger offers private, secure, and reliable instant messaging. It allows for easy setup on multiple devices and supports multiple chat profiles without requiring a phone number. Enjoy end-to-end encryption and the flexibility to run it with your own email or server.

Decentralized instant messagingPrivate onboarding without phone numberEnd-to-end encryption
🌐 Social Networking
(113)
free
17
ChatDip Messenger
ChatDip Messenger
ChatDip Messenger
Private Chat Messenger
Free

Connect privately with friends and family through secure, end-to-end encrypted messaging. Share various media types, utilize disappearing messages, and manage your online presence with customizable availability modes.

End-to-end encrypted messagingDisappearing messagesPhoto, video, and voice message sharing
🌐 Social Networking
(12)
free
18
Trillian
Trillian
Trillian
Modern and secure messaging
Free

This secure messaging platform offers instant communication for businesses, healthcare organizations, and individuals. It modernizes employee communication, provides HIPAA-compliant messaging for healthcare, and allows free, private communication for personal use.

Secure business instant messagingHIPAA-compliant healthcare communicationFree individual messaging
πŸ’Ό Business
(540)
free with in-app purchases
19
wim messenger
wim messenger
wim messenger
Chat Messenger
Free
🌐 Social Networking
(1)
20
Plus: Dual Messenger for iPad
Plus: Dual Messenger for iPad
Plus: Dual Messenger for iPad
Second Number Web for WhatsApp
Free

Easily use a second Messenger account on your phone or iPad. Scan a QR code to manage multiple accounts synchronously, separating personal and business communications.

Dual Messenger supportSecond phone number chatManage separate chats
🌐 Social Networking
(4.4K)
freemium