Communication that stays on your terms

End-to-end encrypted messaging, voice, video, and file sharing — hosted on your server or ours. Either way, we can't read your data.

Download for Windows See Pricing

Free to self-host. No account required. One-time pricing.

TheChatApp

Chat Interface

ChaCha20

E2E ENCRYPTED

< 150ms

VOICE LATENCY

CUSTOM THEMES

Zero

DATA ACCESS

Get started in 30 seconds

Step 1

Download

One file. No installer. Opens in under 2 seconds.

Step 2

Host

Click "Host" — your server is running. Share the code with your team.

Step 3

Talk

They paste the code, they're in. Text, voice, video, files — everything works.

Your Data, Your Rules

On-site or in the cloud. No compromises either way.

Self-Hosted

FREE

Your machine, your data. We're not in the loop — not because of a policy, but because we're not in the architecture.

Click Host — server runs inside the app
Data never leaves your network
No account, no email, no phone number
All core features included
Up to 10 users

Download Free

Cloud Managed

ENTERPRISE

We manage the infrastructure. You hold the keys. End-to-end encrypted, zero-knowledge — we couldn't read your data if we wanted to.

European data centers (Hetzner)
Automatic TLS + encrypted storage
You hold the encryption keys
SSO, SCIM, admin panel
Anonymized logging — we see metadata, never content

Learn More

Same encryption. Same privacy. Different hosting. Your choice.

Everything your team needs

Messaging, voice, video, and enterprise features — all in one secure platform.

Channels, threads, and everything in between

Organize conversations by topic, team, or project. Share files, code snippets, and rich media — all in one place.

Organized channels for teams and projects
Rich text with markdown, code blocks, and @mentions
File sharing with inline previews and thumbnails
Threaded replies to keep conversations focused
In-line polls for quick team decisions
AI-powered semantic search — find messages by meaning

TheChatApp

Messaging

Share files without limits

Transfer any file type directly between peers over encrypted channels. No cloud storage middlemen, no file size limits imposed by third parties. Your files go straight from sender to receiver.

TheChatApp

Share files without limits

Screen sharing that just works

Present your screen to your team with a single click. Hardware-accelerated encoding through FFmpeg delivers smooth performance without taxing your CPU.

TheChatApp

Screen sharing that just works

Make it yours with custom themes

Choose from five built-in themes or create your own. Dark, Light, Glassmorphism, Minimal, and Sharp — or design something entirely new with the JSON theme system.

TheChatApp

Make it yours with custom themes

Host it yourself in minutes

Run TheChatApp Server on any machine with .NET 9. Add Docker for cloud deployment with automatic HTTPS. You own the infrastructure — no vendor lock-in, no monthly per-seat fees.

TheChatApp

Host it yourself in minutes