Top 20 Alternatives to Workplace in Instant Messaging & Chat Software

Industry‑leading team hub with channels, direct messages, powerful search, and thousands of app integrations.

Unified collaboration suite integrated with Office 365, offering chat, video meetings, file sharing, and extensible bots.

Originally for gamers, now a versatile chat platform with voice, video, and persistent text channels, plus robust community tools.

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

Open‑source, self‑hosted Slack alternative focused on security, compliance, and extensive customization.

Fully open‑source chat platform offering on‑premise or cloud deployment, with video calls, live chat, and extensive API support.

Lightweight chat app within the Zoho suite, featuring channels, bots, file sharing, and AI‑driven suggestions.

Team messenger with built‑in productivity tools like to‑do lists, polls, and shared notes, plus over 500 integrations.

Thread‑first messaging platform designed to reduce noise, promote focused work, and integrate with project tools.

Simple team chat with AI‑powered search, unlimited message history, and built‑in task management.

Collaboration hub combining chat, video, file sharing, and task boards, tightly integrated with RingCentral's phone system.

Secure enterprise messenger with end‑to‑end encryption, screen sharing, and compliance‑ready archiving.

All‑in‑one workspace that blends chat, docs, tasks, and video calls into a single collaborative canvas.

Unified communication suite offering persistent chat, video meetings, whiteboarding, and deep integration with Cisco hardware.

Free CRM‑plus‑collaboration platform featuring chat, video calls, project management, and document storage.

Self‑hosted, secure video and chat solution built on the Nextcloud file‑sharing platform, with end‑to‑end encryption.

Threaded, open‑source chat that mixes real‑time and asynchronous communication, ideal for large, distributed teams.

Matrix‑based open‑source messenger offering decentralized communication, end‑to‑end encryption, and rich integrations.

Team inbox that merges chat, email, and notifications into threaded topics, with powerful search and integrations.

Chat and task‑management hybrid that adds private groups, public channels, and built‑in workflow automations.