626 Open source projects that are alternatives of or similar to Deltachat Core

Delta Chat Rust Core library, used by Android/iOS/desktop apps and bindings

Email-based instant messaging for iOS.

Anonymous email forwarding

A C/C++ MIME creation and parser library with support for S/MIME, PGP, and Unix mbox spools.

Email-based instant messaging for Android.

A .NET MIME creation and parser library with support for S/MIME, PGP, DKIM, TNEF and Unix mbox spools.

A cross-platform .NET library for IMAP, POP3, and SMTP.

Send encrypted PGP messages with one click

A secure and PGP enabled webmail module for Phosphorus Five

.NET email library and proxy supporting IMAP, POP3, and SMTP with S/MIME and PGP.

Postfix filter/hook to automatically encrypt outgoing emails with PGP/GPG

📩🛡 Email privacy. Anonymously send and receive with alias forwarding.

Monitor a website and get email and Slack notifications when specific changes are detected

Slack alternative, email integrated, build with Meteor

Serverless applications for Amazon WorkMail.

CLI tool for concealing e-mails in a file by replacing their domain

a free (libre) open source, mobile OS for Ethereum

Package messenger is used for making bots for use with Facebook messenger

iOS native client for ADAMANT Decentralized Messenger

It's a lightweight, fast and reliable Sendmail milter that implements the Sender Policy Framework

🎹 Add a Slack / WhatsApp - style chat keyboard to your Cordova app!

Laravel MJML offers support for rendering MJML syntax into in-line HTML that can be sent within mails.

Companion add-on for Firefox Relay. Keep your email safe from hackers and trackers. Make an email alias with one click, and keep your address to yourself.

An unofficial desktop client for ProtonMail done with electron nativefier

Track prices on Amazon and receive email alerts for price drops

Mercure is a tool for security managers who want to train their colleague to phishing.

⚡️Arduino Mail Client Library to send, read and get incoming mail notification for ESP32, ESP8266 and SAMD21 devices. The library also supported other Arduino devices using Clients interfaces e.g. WiFiClient, EthernetClient, and GSMClient.

Super simple email open/click tracking server.

📱 Wire for iOS (iPhone and iPad)

A Docker container which runs the mbsync tool automatically to synchronize your email

Jenkins Email Extension Plugin

Send emails from ioBroker

Configure Magento 2 to send email using Google App, Gmail, Amazon Simple Email Service (SES), Microsoft Office365 and many other SMTP (Simple Mail Transfer Protocol) servers

An add-on to support woocommerce custom emails

Jigsaw-based PHP build system for rapid HTML email development with Tailwind CSS.

🔐 A free, light and easy to use desktop tool to generate PGP key pairs, encrypt and decrypt messages.

Open-source live customer chat

Copper mail : comprehensive email solution which can be readily deployed without complex configurations.

Add a simple contact form to your Craft CMS site.

Messaging APIs for multi-platform

Monorepo hosting the proton web clients

Krypton turns your iOS device into a WebAuthn/U2F Authenticator: strong, unphishable 2FA.

React component library to generate the HTML emails on the fly

Gnome Email Notifications

No description or website provided.

😎 Chrome extension to fetch the email ID of a user even if they haven't made it public on their GitHub profile

C# Outlook MSG file reader without the need for Outlook

Validate email for common typos and one-time email providers

💬 A PHP library for Facebook Messenger

Lobe is the world's first AI paralegal.

Send email campaigns using Laravel

No description or website provided.

Group Office groupware and CRM

📫 Create, preview, and send custom email templates for Node.js. Highly configurable and supports automatic inline CSS, stylesheets, embedded images and fonts, and much more!

The classic email sending library for PHP

Collaborative open-source successor to qmail

Oracle PL/SQL API for Mailgun

Integrate GIPHY into your React Native project (works with react-native-gifted-chat)

a easy solution for simple IMAP email access in php

🌛 Dark themes / mode for Rambox, Franz or Ferdi messaging services