Chat, Email, Messaging, Communication
Mostly free Chat, Email, Webmail, Messaging, Instant Messenger, Communication software, apps, Email archiving, Address Book software, Email messenger, Communication platform.
Thunderbird is a free, open source, cross-platform e-mail, news and instant messaging client. The project strategy is modeled after Mozilla Firefox.
It supports POP (storing mail locally on your hard drive so that it can be accessed without an internet connection), and IMAP. It features excellent mail filter capabilities and management.
Thunderbird has strong support for using multiple accounts and identities, including automated signature features.
Chat functionality is built in, so you can enjoy real-time conversation with your contacts, right from your favorite messaging application, with multiple supported networks. Thunderbird makes it easy to search through both past conversations and received emails.
Thunderbird can also function as an RSS/Atom feed reader, and has a large selection of add-ons that extend it with calendar support, PGP support, integration with online services and much more.
Available also as portable app: http://portableapps.com/apps/internet/thunderbird_portable
Thunderbird for Android is known as K-9 Mail
Claws Mail is an email client (and news reader), based on GTK+, featuring
Quick response Graceful, and sophisticated interface Easy configuration, intuitive operation Abundant features Extensibility Robustness and stability
The Bat! is a secure email client software, built to protect your correspondence against third-parties.
The Bat! protects your information through multiple encryption streams with the options to encrypt your emails on disk and during communication through an SSL/TLS connection. Free of global email providers that keep your messages in the cloud, and free of Web clients, The Bat! ensures your data stays private.
The Bat! mail client is able to process and store an unlimited number of messages and has no restriction on the number of email accounts you can use.
The internal PGP supports only older RSA keys with IDEA block cipher.
Tuta is the world's most secure email service, easy to use and private by design. You get fully encrypted calendars and contacts with all our personal and business email accounts. It has open source iOS and an Android apps. The Android app is published on F-Droid (which means the app does not use Google's push notification system) making it a great option if you want to de-Google your life. All data is stored encrypted and can not be searched, i.e. for commercial use. It offers dead easy end-to-end encryption.
Encrypted Calendar Organization is key: Regain control over your busy life with Tuta's encrypted calendar. The calendar is integrated seamlessly into the secure email client and can be easily accessed on any device. Event notifications are sent end-to-end encrypted to fully protect your privacy.
Contacts: Tuta allows you to add and manage encrypted contacts, always at hand.
Search: Fast search of encrypted data guarantees privacy.
Mail Storage 1 GB of storage is free for everyone.
Easy - one password for everything Tuta wants to provide the easiest-to-use and most secure email client. You do not have to fiddle with multiple passwords for signing in and for encryption/decryption. The state-of-the-art encryption technology handles all the encryption and decryption complexities. Still: Your password only belongs to you. It is being hashed and salted locally before being transmitted to the servers.
Only you with your password have access to your encrypted data, profiling is impossible. Tuta combines security with ease-of-use so that everybody can use end-to-end encryption. Now you can take back your privacy easily!
Secure email with absolutely no compromises, brought to you by MIT and CERN scientists.
Swiss Based ProtonMail is incorporated in Switzerland and our servers are located in Switzerland. We are outside of US and EU jurisdiction and all user data is protected by strict Swiss privacy laws.
Zero Access Because of our end-to-end encryption, your data is already encrypted by the time it reaches our servers. We have no access to your messages, and since we cannot decrypt them, we cannot share them with third parties.
Backwards Compatible ProtonMail works out of any modern web browser, there is nothing to install. We are also backwards compatible with other email providers so you can continue sending and receiving emails from friends who are not using ProtonMail.
Forever Free We believe privacy is a fundamental human right and should be available for everyone. That's why we offer multi-tiered pricing including a free version that anyone can use. Let's bring privacy back to the people!
Fully Anonymous We do not log IP addresses or require any personal information to sign up. We accept bitcoin and cash payments for paid accounts to ensure even paid account users have complete privacy.
Cross Platform ProtonMail works on all devices, including desktops, laptops, tablets, and smartphones. It's as simple as visiting our site and logging in. There are no plugins or apps to install - simply use your favorite web browser.
Delta Chat looks and feels like other popular messenger apps, but does not involve centralized control, tracking or selling you, friends, colleagues or family out to large organizations. "Privacy by Design" has never been more fun.
Delta Chat taps into the largest, most diverse, most open and decentralized communication system ever created: the existing e-mail server network. Delta Chat requires no additional server-side infrastructure. Just use a standard e-mail account and start chatting with any of your e-mail contacts, whether they have installed Delta Chat or not.
Technically, Delta Chat is an e-mail application with a modern chat interface. E-Mail in a new dress if you will. Chat and contact data remain on your devices. No uploads of Addressbook, calendar or other personal data. There simply are no Delta Chat servers where anything could be uploaded to. Privacy by design.
Use Delta Chat with anyone out of billions of people: just use their e-mail address. Recipients will see a simple e-mail and may directly reply with their own e-mail app. They don't need to install Delta Chat, visit websites or sign up anywhere. If you send a picture or other media to a Chat group your chat recipients will see a nice regular e-mail with an attachment. If they send a message and attachments back, you will see the media in your Chat for this contact.
Delta Chat sends e-mails using your e-mail account and provider of choice. You can change mobile numbers without any trouble or even work without any SIM card at all. You can export all your Chat data on one device, import it on a new device and happily continue chatting. Not requiring mobile numbers avoids cell-tower and other tracking. Privacy by Design.
Using Signal, you can communicate instantly with your relatives without making a compromise on privacy or security. Make video calls, send messages, pictures, videos, documents, voice recordings, GIFs, contacts & location, create groups so that you can chat in real time with all your friends at once and react to their messages with emojis -all with complete privacy-. Signal servers never have access to any of your communications and never store any of your data.
- Say Anything - Share text, voice messages, photos, videos, GIFs and files for free. Signal uses your phone's data connection so you can avoid SMS (No longer supports SMS or MMS) and MMS fees.
- Speak Freely - Make crystal-clear voice and video calls to people who live across town, or across the ocean, with no long-distance charges.
- Make Privacy Stick - Add a new layer of expression to your conversations with encrypted stickers. You can also create and share your own sticker packs.
- Get Together with Groups - Group chats make it easy to stay connected to your family, friends, and coworkers.
- No ads. No trackers. No kidding. - There are no ads, no affiliate marketers, and no creepy tracking in Signal. So focus on sharing the moments that matter with the people who matter to you.
- Remain Connected - Push notifications let you know when new messages have arrived, and they'll be waiting for you even if your battery dies or you temporarily lose service.
- View Source - All of our code is free, open, and available on GitHub (https://github.com/signalapp).
- Join Movements - Technology developed by Open Whisper Systems is trusted and used by millions of people around the world every day.
Element is a Matrix-based end-to-end encrypted (E2EE) secure collaboration and messaging app.
It provides instant messaging, voice and video calls, screen sharing and file sharing; for 1:1s to huge chat rooms. It’s available to use across Web, Android, iOS, macOS, Windows & Linux.
Its decentralised design delivers digital sovereignty, enabling deployment on-premise or through any cloud provider.
Element Matrix Services (EMS) is the most popular SaaS for corporate use of Element. EMS provides fast performance and enterprise-grade add-ons.
Being Matrix-based, Element provides interoperability between traditional siloed apps. It can bridge into proprietary ‘walled garden’ systems such as Slack, Microsoft Teams, WhatsApp, Signal, Telegram and Discord to enable easy connections between different organisations.
End-to-end encryption is provided by default to keep users’ conversations and files safe. Cross-signed device verification uses QR codes or emoji comparisons to guard against imposters and eavesdropping.
Element is built on the Matrix.org open standard which provides bridges to other systems such as Slack, IRC and a lot more soon.
Jami (formerly GNU Ring, SFLphone) positions itself as a potential free Skype replacement
Open Source and cross-platform. Jami gives you a full control over your communications and an unmatched level of privacy.
SIP-compatible softphone and SIP-based instant messenger for Linux, Microsoft Windows, macOS and Android.
Communicate in multiple ways: • A telephone: a simple tool to connect, communicate and share. • A teleconferencing tool: easily join calls to create conferences with multiple participants. • A media sharing tool: Jami supports a variety of video input options, including multiple cameras and image and video files, and the selection of audio inputs and outputs; all this is supported by multiple high quality audio and video codecs. • A messenger: send text messages during calls or out of calls (as long as your peer is connected). • A building block for your IoT project: re-use the universal communications technology of Jami with its portable library on your system of choice.
Developed and maintained by the Canadian company Savoir-faire Linux, and with the help of a global community of users and contributors.
Telegram is a messaging app created by former VK creators with a focus on speed and security. It’s superfast, simple and free. It is like SMS, but more powerful.
You can send messages, photos and videos to people who are in your phone contacts (and have Telegram). You can also create groups for up to 200000 people or channels for unlimited subscribers.
Your chats are not encrypted by default, which enables other people to see what you are writing. You can enable a "Secret Chat" to enable end-to-end encryption.
Telegram offers a Premium plan too: by subscribing to Telegram Premium, users unlock doubled limits, 4 GB file uploads, faster downloads, exclusive stickers and reactions, improved chat management – and a whole lot more. At the same time, all existing features that users have come to expect and rely on for nearly a decade remain free. Moreover, non-premium users will be able to enjoy some of Premium's benefits: for example, download the extra-large documents and view stickers sent by premium users, as well as tap to increase counters on premium reactions that were already added to a message. There are different prices for the Premium subscription based on your country, also if you buy it via the @premiumbot you don't have to pay the app store fees.
Telegram's security model has received notable criticism by cryptography experts. They criticized the general security model of permanently storing all contacts, messages and media together with their decryption keys on its servers by default and by not enabling end-to-end encryption for messages by default.
Telegram's client-side code is open-source software, whereas its server-side code is closed-source and proprietary. The service also provides public APIs with which developers can access the same functionality as Telegram's official apps to build their own messaging applications.
Telegram also provides a bot API for programmers to create different kinds of Telegram bots. Bots are simply Telegram accounts operated by software – not people – and they'll often have AI features. They can do anything – teach, play, search, broadcast, remind, connect, integrate with other services, or even pass commands to the Internet of Things.
Briar is a messaging app designed for activists, journalists, and anyone else who needs a safe, easy and robust way to communicate.
- Unlike traditional messaging tools such as email, Twitter or Telegram, Briar doesn't rely on a central server - messages are synchronized directly between the users' devices. If the Internet's down, Briar can sync via Bluetooth or Wi-Fi, keeping the information flowing in a crisis. If the Internet's up, Briar can sync via the Tor network, protecting users and their relationships from surveillance.
BeeBEEP is a secure network chat. You can talk and send files with all your friends inside a local area network such of an office, home or internet cafe without a server.
BeeBEEP is already included in BeeFee OS.
Free: BeeBEEP is free and always will be. Multiple OS: there are releases for Windows, MacOSX, Linux, OS/2 and eComStation. Easy to use: BeeBEEP is a serverless application. Download, unzip and start. Secure: encryption based on Rijndael Algorithm (AES). Instant Messaging: chat with all people connected, group or single user. Groups: create your favorite group of people. P2P: send or share your files and folders (also by drag and drop). Offline messages: messages will be delivered to offline users when they will be online. Message History: all messages can be saved.
The goal of Gajim is to provide a full featured and easy to use XMPP client. Gajim works nicely with GNOME, but does not require it to run. It is released under the GNU General Public License.
- Tabbed chat window and single window modes
- Group chat support (with Multi-User Chat protocol), invitation, chat to group chat transformation, minimize group chat to roster
- Emoticons, avatars, PEP (user activity, mood and tune)
- Audio / video conferences
- File transfer, room bookmarks
- Metacontacts support
- Trayicon, speller, extended chat history functionalities
- TLS, GPG and End-To-End encryption (OTR and OMEMO) support (with SSL legacy support)
- Transport registration support
- Service discovery including nodes, user search
- Wikipedia, dictionary and search engine lookup
- Multiple accounts support
- DBus capabilities. Read more information
- XML console
- Link local (bonjour / zeroconf), BOSH
- Other features via plugins
- Gajim is available in 29 languages: Basque, Belarusian, Brasilian, British, Bulgarian, Chinese (simplified), Croatian, Czech, Danish, English, Esperanto, French, Galician, German, Hebrew, Hungarian, Italian, Japanese, Kazakh, Lithuanian, Norwegian (Bokmål), Polish, Russian, Serbian, Spanish, Slovak, Swedish, Turkish and Ukrainian
Pidgin is a chat program which lets you log into accounts on multiple chat networks simultaneously. This means that you can be chatting with friends on XMPP and sitting in an IRC channel at the same time.
Pidgin is compatible with the following chat networks out of the box: Jabber/XMPP, Bonjour, Gadu-Gadu, IRC, Novell GroupWise Messenger, Lotus Sametime, SILC, SIMPLE, and Zephyr. It can support many more with plugins.
Pidgin supports many features of these chat networks, such as file transfers, away messages, buddy icons, custom smileys, and typing notifications. Numerous plugins also extend Pidgin’s functionality above and beyond the standard features.
Pidgin is free and contains no ads. All our code is open source and licensed under the GNU General Public License. This means you can get Pidgin’s underlying code and modify it to suit your needs, as long as you publish the changes you make for everyone to benefit from as well.
is the open standard for messaging and presence. XMPP powers emerging technologies like IoT, WebRTC, and social.
RetroShare is a open source cross-platform, private and secure decentralized communication system. It lets you to securely chat, share photos, videos, and more, using OpenPGP to authenticate peers and OpenSSL to encrypt all communication.
Send text and images. Discuss with various people in chat rooms. Express your emotions with the rich smiley set. Use distant chat to securely chat with friends-of-friends.
Voice and Video
Make free and secure calls with the VoIP plugin. Catch up face to face with a video call.
Send encrypted messages to other members of the network. Retroshare can store encrypted messages on friends nodes to deliver messages while you're offline.
Share files with your friends or with the whole network. Use the search to find files. Retroshare uses swarming similar to BitTorrent, to accelerate the download. This makes it possible to share big files with 1GB or more. Your privacy is protected with anonymous tunnels. Only your direct friends might learn which files you download.
You can read and write forum posts offline. This is perfect while you're on the go. When you have an Internet connection, Retroshare will automatically sync forums with your friends. Decentralized forums are censorship resistant by design.
Share your favorite links. See which links others like. Vote and discuss links.
Publish files in channels. Subscribe to channels and automatically download the latest files. Comment on files and spread them to your friends.
Utopia P2P Ecosystem. Utopia is a feature-rich platform that is specifically designed to protect privacy of communication, confidentiality, and security of personal data. Utopia is a decentralized network, with no central server involved in data transmission or storage. The network is supported by people who use its many high quality features.
Secure and surveillance resistant communication Instant encrypted text, voice and e-mail communication.
Built-in wallet, crypto cards and API for merchants Make and receive payments in Utopia own e-currency crypton.
Decentralized P2P network No central servers. Each user participates in network routing.
Mining made easy Earn cryptons by running Utopia software or mining bots online.
Designed for anonymity Utopia ensures your privacy. Your IP address and identity cannot be revealed.
uNS - Utopia Name System Truly decentralized and non-censored registry, equivalent of classic DNS.
Secure web browser Tor alternative. Surf the Utopia ecosystem by using built-in Idyll browser.
Secure storage and transmission Utopia uses 256-bit AES and curve25519 high-speed encryption.
MailStore Home - A 100% free single-private-user desktop solution
MailStore Home enables you to backup all your email messages from multiple applications and accounts into one secure and persistent archive. Lightning-fast search, one-click backup, powerful export - all information from your email is at your fingertips anytime. Never lose important email again!
- Integrated CD/DVD burning utility to backup your archives with just one click
- In addition to backing up the entire archive, your messages can be exported to a variety of destinations
- Search all your email within fractions of a second
With Free Address Book - Free Phone Book you can note the addresses, phone numbers, mobile, fax, company name, country, city, website address and email addresses of your contacts and partners.
Add your custom fields, where you can store your special data, which is not default in this program.
You can easy customize printable list of contacts and details page of selected contact.
Export/import your contacts in CSV format.
Phone Book is absolutely free!
Organize your contacts easy and fast!
Open Contacts is an advanced address book program for managing contact info of individuals and organizations with relationships. Distributed as freeware, the program was designed for people who need more beyond ordinary address book programs in order to improve dynamic interactions with contacts. In addition, with SyncML for Open Contacts, you may synchronize contact info with smart phone, PDA and Web address books etc.
The Nextcloud contacts app is a user interface for Nextcloud's CardDAV server. Easily sync contacts from various devices with your Nextcloud and edit them online.
🚀 Integration with other Nextcloud apps! Currently Mail and Calendar – more to come. 🎉 Never forget a birthday! You can sync birthdays and other recurring events with your Nextcloud Calendar. 👥 Sharing of Adressbooks! You want to share your contacts with your friends or coworkers? No problem! 🙈 We’re not reinventing the wheel! Based on the great and open SabreDAV library.
You should have full control over your data. We help you achieve that: a safe home for all your data. Secure, under your control and developed in an open, transparent and trustworthy way. We are Nextcloud.
Nextcloud offers industry-leading on-premises file sync and online collaboration technology. Our expertise is in combining the convenience and ease of use of consumer-grade solutions like Dropbox and Google Drive with the security, privacy and control business needs.
Our self-hosted solutions ensure you know where data is, who has access, and that even meta-data does not leak.
We create three products, integrated and acting as one:
Nextcloud Files offers an on-premise Universal File Access and sync platform with powerful collaboration capabilities and desktop, mobile and web interfaces.
Nextcloud Talk delivers on-premises, private audio/video conferencing and text chat through browser and mobile interfaces with integrated screen sharing and SIP integration.
Nextcloud Groupware integrates Calendar, Contacts, Mail and other productivity features to help teams get their work done faster and easier.
Our products integrate powerful capabilities to control and monitor data exchange and communication, including our unique File Access Control and workflow features, extensive audit logs, fine-grained sharing controls and more.
Security is Nextcloud users' greatest concerns and our prime advantage over competitors. Nextcloud features a host of unique, innovative security technologies from brute force protection to advanced server side and integrated end-to-end, client side encryption with enterprise-grade key handling and a wide range of security hardenings. Our security has been reviewed by trusted third parties and is backed by a USD 5000 Security Bug Bounty Program, providing the confidence that data meant to stay private will stay private.