Apps with 'Threaded Conversations' feature

Email service.

Twitter is an online social networking service that enables users to send and read short 280-character messages called "tweets".

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

Bring your workspace together into one unified app. It’s everything your team has been looking for in a productivity and messaging app, but easier, and all with your email.
Welcome to the shortest path to done.
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A communication app for teams to create a calmer, more organized, more productive workplace.

A newly open sourced self hosted Slack like alternative for building persistent chat communities.

Threads is a platform designed to make work more inclusive by empowering teams to discuss and make decisions at scale.

Collaborative email and threaded group chat for productive teams. A single app for all your internal and external communication.

When teamwork gets too noisy and overwhelming, leaders struggle to communicate effectively with their teams. With Carrot, leaders rise above the noise to communicate what matters.

Cocoon is a dedicated space for the most important people in your life. You use it with a single group who you want to feel closer with — it's like your home, on your phone.

Platform for creating free private forums on a subdomain and cloud hosted software developed and maintained by ArmorForums. Free hosting services for forum websites and full control over settings, users, content and more.

Hey is a new hosted email service launched by the makers of Basecamp , which aims to organize your email inbox.

Smithy is an app for Slack that allows channels to be designated as threads-only, making threads mandatory and automatically cleaning up the rest.