Top 30 Secure Team Chat Software for Remote Teams

Open‑source messenger with strong end‑to‑end encryption, perfect for small teams that need privacy by default.

Enterprise‑grade chat with end‑to‑end encryption, guest rooms, file sharing, and compliance with GDPR, ISO 27001, and SOC 2.

Self‑hosted, open‑source Slack alternative offering end‑to‑end encryption (EE), SSO, audit logs, and on‑prem deployment for full data control.

Self‑hosted chat platform with optional E2EE, LDAP/SSO integration, HIPAA compliance, and extensive customization via plugins.

Integrated with Microsoft 365, provides data loss prevention, information barriers, compliance certifications, and optional E2EE for one‑to‑one calls.

Industry‑leading collaboration tool with enterprise security controls, SSO, data residency options, and optional E2EE for direct messages.

Chat component of Zoom with end‑to‑end encryption for messages, admin controls, and seamless integration with Zoom meetings.

Secure messaging, file sharing, and video calling with E2EE, compliance (SOC 2, ISO 27001), and deep integration with Cisco security suite.

Open‑source platform offering encrypted chat, file storage, and Git hosting; all data is end‑to‑end encrypted by default.

Federated, open‑source messenger built on the Matrix protocol with optional end‑to‑end encryption and self‑hosting capabilities.

Threaded open‑source chat with optional self‑hosting, SSO, and granular permission controls; supports end‑to‑end encryption via plugins.

Asynchronous team communication tool focused on low‑distraction, with encryption at rest and in transit, and SOC 2 compliance.

Team messenger with TLS encryption, data residency options, and admin security controls; integrates with major SaaS tools.

Simple chat platform offering end‑to‑end encryption for private messages, GDPR compliance, and AI‑powered task management.

Unified messaging, video, and task management with encryption in transit, ISO 27001 compliance, and enterprise admin policies.

Team chat plus workflow automation with SSO, data encryption, and SOC 2 compliance for regulated industries.

Collaborative workspace with encrypted chat, file sharing, and real‑time editing; meets GDPR and ISO 27001 standards.

Business‑focused Discord offering enhanced security controls, data residency, and optional end‑to‑end encryption for voice/video.

Component of Microsoft 365 that adds secure, real‑time collaborative chat to Loop pages, backed by Teams security model.

Secure messaging platform with end‑to‑end encryption, self‑hosting, and compliance with HIPAA, GDPR, and ISO 27001.

On‑premises deployment of Wire for organizations needing full control over encryption keys and data residency.

Swiss‑based messenger with end‑to‑end encryption, no phone number required, and strict data‑privacy laws.

Push‑to‑talk chat with encrypted voice, video, and text; offers enterprise admin console and compliance reporting.

Decentralized, open‑source communication platform with end‑to‑end encryption and no central server, ideal for privacy‑first teams.

Secure team chat with granular permissions, data encryption, and compliance certifications (SOC 2, ISO 27001).

Open‑source, low‑latency voice chat with optional encryption; can be self‑hosted for full control.

Adds AI‑powered noise cancellation and end‑to‑end encrypted voice/video chat to existing collaboration tools.

Hosted version of Mattermost with optional end‑to‑end encryption for direct messages and private channels.

Managed Rocket.Chat service with enterprise‑grade encryption, compliance, and 24/7 support.

Slack’s cross‑organization messaging feature now offers end‑to‑end encryption for selected channels (beta).

Private channels with optional end‑to‑end encryption for highly confidential conversations.