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Secure comms for teams that don't compromise.

Encrypted messaging, enterprise email, and AI knowledge agents — in one self-hosted platform you actually own. No third-party access. No vendor lock-in. Your data, your rules.

app.arkivistmail.com
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#arkivist
Arkivist: Stored "Architecture..."
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#general
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#arkivistKnowledge base
MaxB2:34 PM
Store this whitepaper on our encryption architecture
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ArkivistAI2:34 PM
Stored "Encryption Architecture v2" (ID: doc-7, category: architecture). Knowledge base now has 12 entries.
RobP2:35 PM
What do we know about federation?
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ArkivistAI2:35 PM
Found 3 entries:
Federation Protocol Design (doc-3) — architecture
Decision: Disable federation for v1 (doc-5) — decision
Matrix server_name migration (doc-11) — process
Message #arkivist

Built on open, battle-tested technology

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    Matrix

    Protocol

  • C

    Conduwuit

    Rust Homeserver

  • S

    Stalwart

    Mail Server

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    Go

    API Layer

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    React

    Portal UI

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    Claude AI

    Agents

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    Cinny

    Chat Client

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    Docker

    Deployment

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    Nginx

    Edge Proxy

  • S

    SQLite

    Persistence

  • J

    JMAP

    Email Protocol

  • L

    Let's Encrypt

    TLS Certs

Built for teams that take security seriously

Whether you're a startup protecting IP, a government contractor handling classified data, or a team that simply values privacy — Arkivist gives you total control over your communications.

Startups & Scale-ups

Replace Slack + Gmail + Notion with one platform. Encrypted messaging, email, and AI knowledge base — from day one.

Government & Defense

ITAR-ready communications with classification levels, legal holds, evidence chains, and warrant management built in.

Regulated Industries

HIPAA, SOC2, FedRAMP compliance pathways. Retention policies, audit logs, and message export for any regulatory requirement.

We built Arkivist because every communications platform we tried either locked our data in someone else's cloud or required six different tools to cover messaging, email, and knowledge management. Now it's one platform, fully encrypted, fully ours.

Archivus

Platform - Your entire comms layer — encrypted, intelligent, and under your control.

Arkivist replaces your fragmented communications stack with a single, self-hosted platform that's secure by default and powered by AI.

  • Encrypted Messaging. Real-time channels powered by the Matrix protocol with end-to-end encryption. Create rooms, invite teammates, share files — all encrypted at rest and in transit.
  • Enterprise Email. Send and receive email from your custom domain. Native inbox with compose, reply, forward — built into the portal. No separate email client needed.
  • AI Knowledge Agents. Arkivist AI stores whitepapers, decisions, and discussions. Search your team's institutional memory with natural language. Agents run on schedule or on demand.
  • Compliance & Sovereignty. Retention policies, legal holds, evidence chains, audit logs. Deploy on your infrastructure. Your data never touches our servers.

Built with - Open protocols. Battle-tested infrastructure.

Every layer of Arkivist is built on proven, open-source technology. No proprietary lock-in — you can inspect, audit, and extend everything.

Messaging Protocol

Matrix / Conduwuit

The Matrix protocol powers our encrypted messaging — federated, decentralized, and E2EE by default. Conduwuit (Rust) gives us sub-millisecond message routing.

Email Server

Stalwart Mail

Enterprise SMTP/IMAP/JMAP email server with DKIM, SPF, DMARC out of the box. Full email sending and receiving on your custom domain.

Application Layer

Go + React + TypeScript

UbiComm API in Go (Gin framework) with a React portal frontend. Type-safe, fast, and deployable as a single Docker Compose stack.

Agent Intelligence

Claude AI via OpenRouter

AI agents powered by Anthropic Claude through OpenRouter. Tool-calling architecture with persistent SQLite storage for knowledge, notes, and workflows.

Chat Client

Cinny

Lightweight, modern Matrix client embedded in the portal. Clean UI, full E2EE support, white-labeled as Arkivist. No Electron bloat.

Edge & TLS

Nginx + Let's Encrypt

Reverse proxy with automatic certificate renewal. All traffic encrypted in transit. CSP headers, HSTS, and security hardening built in.

Parent Company - An Archivus product.

Arkivist is built by Archivus — a company building the infrastructure layer for secure, AI-native organizations. We believe every team deserves communications they truly own.

The Archivus Ecosystem

Archivus is building a suite of products for organizations that refuse to compromise on data sovereignty. Arkivist is our communications platform — handling everything from encrypted messaging to AI-powered knowledge management.

Every product in the ecosystem is designed to be self-hosted, open-protocol, and interoperable. No walled gardens. No data harvesting. Just tools that work for you, not against you.

Visit archivus.ioTry Arkivist
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Arkivist

Secure team comms

Live
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GOLAG

Agent runtime (Rust)

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CHROMA

Federation layer

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Cramp3d

Marketing automation

The numbers behind the platform

AI agents running
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End-to-end encrypted
E2EE
Docker services
13
Message delivery
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Ready to take control of your communications?

Get started with Arkivist today. Deploy on your infrastructure or let us handle it.

Get StartedContact Us

Arkivist by Archivus

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