Chat for distributed teams. Zulip combines the immediacy of real-time chat with an email threading model. With Zulip, you can catch up on important conversations while ignoring irrelevant ones.

experts Open Source

Check fewer notifications, do more meaningful work. Twist is the team communication app for calmer, more organized, and more productive teamwork.

experts

We provide multiple countries' real phone numbers to bypass SMS verification for all kinds of service. Short term and Long term rental numbers are available.

experts paid $0.05 / Usage

Free chat and collaboration app for teams with unlimited users and message history.

experts freemium $2.49 / Monthly ("Group calls", "10GB per user", "Screen sharing",)

Openmeetings provides video conferencing, instant messaging, white board, collaborative document...

experts

Send and receive SMS & Fax via app, email or API. ISO certified & data privacy compliant. SMS marketing and campaign management for bulk SMS.

experts paid $0.02 / Usage

Business Messaging.

experts