Group and direct chat
Real-time channels for every team and project, plus private one-to-one direct messages. Mentions, edits, and read state keep fast-moving conversations easy to follow.
Private collaboration workspace
Secure team chat and file sharing, behind two-factor authentication
ReactiveZero Collab is a private, invite-only workspace where your team talks in real time, shares files in organized folders, and stays protected by mandatory TOTP two-factor authentication on every account.
Invite-only
Mandatory 2FA
HTTPS everywhere
Access-checked downloads
Everything your team needs, in one private workspace
Real-time messaging, a shared file library, and closed groups — wrapped in strong authentication and clear admin controls. Built for teams that want to collaborate without spreading their conversations across public tools.
File library with folder sharing
Upload documents and images into a shared library, organize them into folders, and share whole folders with your team. Every download is access-checked and served securely — never guessable by URL.
Private groups
Spin up closed group chats for sensitive work. Only invited members can read the conversation or reach its attachments — nothing leaks to the wider workspace.
Mandatory two-factor authentication
Two-factor authentication is required for everyone. Each account is protected by a time-based one-time passcode (TOTP) from an authenticator app, enrolled the first time you sign in.
Browser push notifications
Get notified the moment someone messages you or mentions your name — even when the tab is closed — with native browser push you can enable in a single click.
Admin controls and audit
Admins invite new members, manage roles, and reset access, backed by an audit log of sensitive actions. The workspace stays accountable and fully under your control.
Who’s behind it
Built by ReactiveZero
ReactiveZero Collab is built and operated by ReactiveZero, a security-focused engineering studio. The platform is invite-only, served entirely over HTTPS, and designed so that your team’s access, files, and conversations stay private — visible only to the people you invite.
Visit reactivezero.com
Get started
Request access to ReactiveZero Collab
Access is invite-only. Tell us about your team and we’ll set you up with a secure account and a two-factor setup link.