The best alternatives to Matrix are Slack, Klaus Sinani, and Threads. If these 3 options don't work for you, we've listed a few more alternatives below.
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Agree.com— Free e-signature for everyone with invoicing and payments!
Slack is an application that helps teams communicate and work together by combining messaging, file sharing, and app integrations in one place. It makes it easy for teams to stay connected and work efficiently, whether they are in the office or working remotely.
Tookan is a delivery services management tool for businesses that deliver products and services to their clients. The software is used by multiple business types, including pickup and delivery, beauty services, health and well-being services based companies