Pumble
4.9 out of 5 stars
(84 Ratings)
Pumble is a free team chat app allowing teams to collaborate and cut down on email, centralize communication, and improve productivity.
Pumble offers unlimited number of users, unlimited chat history, voice calls and video calls, all for free. Every message will find its recipient quickly through private, direct or public channels, file sharing, or threads and mentions.
More options are available in paid plans aimed towards professionals. Your communication hub will help manage non-desk employees, daily operations, communications, and human resource management.
Pumble’s paid plan include features like:
Screen sharing in video calls
Customizable sidebar
Guest access
Managing user accounts options
More file storage - 10GB per team member
Pumble is available across platforms (web, Android, iOS, Windows, and Mac).
Avoid messy emails, keep your communication organized and improve productivity with Pumble.
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Zooid
Zooid is an open-source team chat app built on the Matrix protocol, offering channels, threads, direct messages, and spaces. It can be self-hosted so conversation history and data remain on infrastructure the operator controls.
The application is designed so that AI agents can take part in the same rooms as human team members. Agents that support the Agent Client Protocol (ACP), such as Claude Code, Codex, and opencode, can be added to a room, where their actions render as structured interface elements rather than plain text: permission requests appear as approval cards, tool calls as structured data, task plans as checklists, and sub-agent hierarchies as an expandable tree. Each agent runs in its own sandboxed container.
Zooid is released under the MIT license and is self-hostable end to end.
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Slack
4.6 out of 5 stars
(250 Ratings)
Slack is a work collaboration platform that brings people, apps, data, and AI agents together in one shared workspace. It helps teams communicate through channels, direct messages, huddles, Slack Connect, files, canvases, lists, workflows, and integrations. The platform includes Slackbot, a context-aware AI agent that can summarize conversations, search across messages and files, prepare users for meetings, analyze documents, and help complete tasks without leaving Slack. Slack also supports connected apps such as Salesforce, Google Drive, GitHub, Zoom, Asana, Box, Workday, ChatGPT, and many others. Teams can use Workflow Builder to automate stand-ups, project updates, approvals, notifications, and routine business processes. With enterprise search, AI assistance, secure collaboration, and a large integration ecosystem, Slack helps organizations stay aligned, move faster, and reduce work scattered across disconnected tools.
Learn more about Slack
Dialpad Connect
4.5 out of 5 stars
(18 Ratings)
Dialpad Connect is an AI-powered unified communications platform that combines voice, video, and messaging to enhance team collaboration and customer interactions. It features real-time call transcription, automated call summaries, and AI-generated action items to help users stay focused during conversations. The platform integrates seamlessly with popular business apps like Salesforce, Zendesk, Microsoft Teams, and Google Workspace to streamline workflows. Designed for businesses of all sizes, Dialpad Connect delivers enterprise-grade reliability with 100% uptime SLA and robust disaster recovery. Security and privacy are core priorities, meeting standards like GDPR, HIPAA, and SOC 2 compliance. Dialpad Connect helps companies elevate customer experiences while boosting team productivity.
Learn more about Dialpad Connect