Top 20 Alternatives to Slack in Team Chat & Conferencing Software

Integrated with Microsoft 365, Teams offers chat, video meetings, file sharing, and deep Office app collaboration.

Originally for gamers, Discord provides persistent voice channels, text chat, screen sharing, and robust community moderation tools.

Open‑source, self‑hosted Slack alternative focused on security and compliance, with rich integrations and customizable workflows.

Fully open‑source chat platform that can be self‑hosted or cloud‑hosted, offering real‑time messaging, video calls, and extensive app marketplace.

Threaded, topic‑based chat that keeps conversations organized; supports async communication and integrates with many dev tools.

Team messenger with built‑in video calls, shared to‑dos, and a suite of productivity bots and integrations.

Designed for focused work, Twist uses threaded conversations and a calm UI to reduce real‑time interruptions.

Simple AI‑powered team chat with unlimited message history, voice calls, and task management features.

Combines chat, task boards, and workflow automation in a single platform for small‑to‑mid‑size teams.

Unified messaging, video meetings, and collaborative file sharing integrated with RingCentral's phone system.

Enterprise‑grade social network with chat, groups, live video broadcasting, and integration with Workplace tools.

Secure team collaboration suite offering persistent chat, video meetings, whiteboarding, and deep Cisco ecosystem integration.

Part of Google Workspace, provides threaded conversations, direct messaging, and seamless integration with Google Docs, Drive, and Meet.

Lightweight chat app with channels, bots, and integration across the Zoho suite and third‑party services.

All‑in‑one workspace that blends chat, video calls, document collaboration, and task management.

Secure team messenger with end‑to‑end encryption, voice/video calls, and built‑in file sharing.

Threaded team inbox that combines chat, email, and integrations for developers and operations teams.

Internal communication platform focused on employee engagement, with chat, news feeds, and recognition tools.

Enterprise chat with advanced security controls, compliance features, and integration with Microsoft 365 and Google Workspace.

Open‑source, federated messaging app built on the Matrix protocol; offers end‑to‑end encryption and bridge to other networks.