Apps with 'Chat Bot' feature

Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free. It is like SMS, but more powerful.

All-in-one voice, video and text chat for gamers that’s free, secure, and works on both your desktop and phone.

A free instant messaging and collaboration software based on the Matrix protocol.

Mumble is an open source, low-latency, high quality voice chat software primarily intended for use while gaming.

Matrix defines a set of open APIs for decentralised communication, suitable for securely publishing, persisting and subscribing to data over a global open federation of servers...

Mattermost is an open source, self-hosted Slack alternative.

Rocket.Chat is a Web Chat Server, developed in JavaScript, using the Meteor fullstack framework.

Zulip is a group chat app in which messages are threaded by topic, helping you have long-running, organized conversations.

Conversations is a privacy focused, open source XMPP Texting [Jabber] client for Android 4.0+ smart phones with wife-approved easy encryption [OTR, OMEMO, or GPG].[Note]

netdata is a system for distributed real-time performance and health monitoring.

A communication app for teams to create a calmer, more organized, more productive workplace.

An alternative Telegram client based on TDLib, with higher speed, slicker animations and experimental features.

Userlike is free live chat and customer messaging software for web and messaging support. Connect with your customers on your website, Facebook Messenger, WhatsApp, Telegram and SMS.
.

Live chat for websites and webshops. Start a personal conversation with your visitors and turn them into happy customers.

Mibew Messenger (also known as Open Web Messenger) is an open-source live support application written in PHP and MySQL.