iPlum is described as '- the world’s first mobile app that makes a personal U.S. phone number available to users around the world for only $1/month, for their phone or tablet. The app also provides international calling and roaming in 200+ countries, at rates as low as 1 cent per minute' and is an app in the Office & Productivity category. There are more than 25 alternatives to iPlum for a variety of platforms, including Android, iPhone, Online / Web-based, Windows and Android Tablet. The best alternative is Skype, which is free. Other great apps like iPlum are WhatsApp (Free), Hangouts (Free), aTalk (Free, Open Source) and Nertivia (Free, Open Source).
Skype is the most popular free voice-over IP and instant messaging service globally. It allows users to text, video and voice call over the internet. Users can also call landlines and mobiles at competitive rates using Skype credit, premium accounts and subscriptions.
WhatsApp is an iPhone and Android messaging app which allows you to exchange messages without having to pay for SMS. In addition to basic messaging WhatsApp users can create groups, send each other unlimited images, video and audio media messages.
aTalk is an XMPP client that supports the following features: * Instant messaging in plain text and End-to-End encryption with OMEMO or OTR * OMEMO encryption is available during multi-user group chat session, giving users maximum privacy and security * Supports both voice...
Nertivia is an chat client that allows you to chat to anyone across the world. There are a lot of features that don't require you to pay at all such as, gif profile pictures, free custom emojis and more coming soon!
VideoMeeting is a free and open source video conference solution built to have video calls and chats using your web browser. It is a pure web application based on WebRTC that can provide communication features within your web browser.
Daily is an audio and video API. Easily build video chats in your web or mobile apps with an API built on top of WebRTC or drop in the Prebuilt UI for fast video conferencing integration. 1,000 person video and audio calls. HIPAA compliant.
Fully open source instant messaging server and clients. No proprietary components or non-free dependencies. Backend in pure Go (GPL 3.0), with a command-line administration tool in python + gRPC. Clients for Android, iPhone, and Web - ReactJS (all licensed under Apache 2.0).