IBM Sametime is a secure, on‑premise and cloud‑enabled instant messaging and collaboration platform for large enterprises. Looking for modern, flexible alternatives that support rich messaging, presence, video, file sharing, compliance, and integration with productivity suites? Below are 20 enterprise‑grade instant‑messaging solutions you can evaluate.
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Integrated with Microsoft 365, Teams offers chat, voice, video, file sharing, and deep app integrations for enterprise collaboration.
Popular channel‑based messaging platform with robust APIs, workflow automation, and extensive third‑party app ecosystem.
Secure, enterprise‑grade messaging with persistent chat, file sharing, and integration with Webex Meetings and Cisco’s collaboration suite.
Built‑in persistent chat for Zoom users, supporting threaded conversations, file sharing, and integration with Zoom Meetings and Phone.
Part of Google Workspace, offering direct messages, topic‑based rooms, AI‑driven suggestions, and seamless integration with Google Docs, Drive, and Meet.
Open‑source, self‑hosted messaging platform focused on security, compliance, and extensibility with a rich plugin ecosystem.
Fully customizable, open‑source chat solution that can be deployed on‑premise or in the cloud, supporting video, voice, and extensive integrations.
Lightweight team chat with channels, bots, AI‑powered suggestions, and tight integration with Zoho’s suite of business apps.
Unified messaging, task management, and video conferencing in a single app, designed for distributed workforces.
Enterprise social network with chat, groups, live video, and AI‑driven content discovery, leveraging familiar Facebook UI.
Team messenger with channels, video calls, shared to‑dos, and built‑in productivity tools like polls and reminders.
Simple, AI‑enhanced team chat with unlimited message history, task management, and voice/video calls.
Thread‑oriented messaging platform designed to reduce interruptions and improve focus, with integrations for project tools.
Combines team chat, task management, and workflow automation in a single, searchable hub.
Collaborative workspace offering chat, video, file sharing, and real‑time document co‑editing.
Secure instant messaging, presence, voice, and video for Cisco‑centric environments, with integration to Cisco Unified Communications.
Microsoft’s former enterprise IM solution, still used in some organizations for its tight Office integration and PSTN calling.
Robust voice, video, and text chat platform offering dedicated servers, advanced moderation, and API access for large organizations.
Collaboration suite with secure messaging, digital signatures, and workflow automation, targeting regulated industries.
All‑in‑one collaboration suite with chat, video calls, cloud docs, and calendar, popular in APAC enterprises.