Introducing PH Agent Hub — Open-Source, Multi-Tenant AI Platform

Why We Built It

At KAINOTOMO PH LTD, we've been running AI-powered internal tools for years. We used OpenAI, then DeepSeek, then various frameworks — but we kept running into the same problem:

Every AI platform was either:

  • A single-user chat app with no admin controls
  • An enterprise product with per-seat pricing that made no sense for a small team
  • A platform that locked us into one model provider
  • An open-source project that was multi-user but not multi-tenant

We needed something different. We needed a platform where:

  • Different clients or departments have completely isolated environments — their own users, models, tools, templates, and data
  • An admin can manage everything through a dedicated UI — tenants, models, tools, users
  • Each tenant chooses their own AI model — DeepSeek, OpenAI, Anthropic, Ollama, whatever works for them
  • It's self-hosted — our data never leaves our server
  • It's lightweight — Docker Compose, one server, done

Nothing on the market checked all those boxes. So we built it.

Today, I'm proud to introduce PH Agent Hub — an open-source, MIT-licensed, multi-tenant AI platform that we use daily in production.

What Makes PH Agent Hub Different

There are many open-source AI chat platforms — Dify, Onyx, LibreChat, Open WebUI. They're all excellent projects. But none of them do what PH Agent Hub does out of the box.

1. True Multi-Tenancy (Not Just Multi-User)

Most platforms are multi-user — everyone shares the same models, tools, and configuration. PH Agent Hub is true multi-tenant:

Feature Multi-User Multi-Tenant (PH Agent Hub)
Each tenant has own users ❌ Shared ✅ Isolated
Each tenant has own models ❌ Shared ✅ Per-tenant config
Each tenant has own tools ❌ Shared ✅ Per-tenant activation
Each tenant has own templates ❌ Shared ✅ Custom per tenant
Data isolation ❌ All in one pool ✅ Fully separated

This matters if you're a consultancy managing AI for multiple clients, an enterprise with separate departments, or a hosting provider offering AI-as-a-service.

2. Dual UI — Chat + Admin

PH Agent Hub ships with two UIs in one React application:

  • Chat Area — where end users interact with AI agents, manage sessions, upload files, use tools, and configure their personal memory
  • Admin Area — where administrators manage tenants, models, tools, templates, skills, and users

No separate dashboard to install. No configuration via environment variables. It's all there, in one clean interface.

3. DeepSeek-First with Stabilizer

We use DeepSeek extensively. It's powerful, but it has quirks — reasoning tokens that leak into responses, occasional JSON formatting issues, connection hiccups.

PH Agent Hub includes a built-in DeepSeek Stabilizer that handles:

  • Reasoning token stripping — automatically removes thinking tokens from responses
  • JSON repair — recovers malformed JSON from model outputs
  • Intelligent retry — retries with adjusted parameters on failure
  • Token usage tracking — per-tenant and per-user

No other open-source platform has this level of DeepSeek integration.

4. Bring Your Own Key (BYOK)

Each tenant can use their own API key for their chosen model provider. This means:

  • You don't pay for their tokens
  • They control their own usage and billing
  • They can switch providers anytime
  • You only charge for the platform, not the AI

This is a game-changer for hosting providers and consultancies.

5. Session Branching

Users can edit previous messages or regenerate responses at any point. Each edit creates a new branch, preserving the full conversation history. No more losing context because you typed a typo.

6. Embeddable Chat Widget

PH Agent Hub includes a lightweight, embeddable chat widget — a simple <script> tag that businesses can paste on their website to add an AI-powered chat assistant. It talks directly to your PH Agent Hub backend, maintaining full tenant isolation.

Architecture

PH Agent Hub is built on a modern, containerized stack:

┌─────────────┐    ┌─────────────┐
│   React     │    │   FastAPI   │
│   Frontend  │◄──►│   Backend   │
│  (Next.js)  │    │  (Python)   │
└─────────────┘    └──────┬──────┘
                          │
                    ┌──────┴──────┐
                    │  Microsoft  │
                    │   Agent     │
                    │  Framework  │
                    └─────────────┘
                          │
        ┌─────────────────┼─────────────────┐
        │                 │                 │
   ┌────┴────┐      ┌────┴────┐      ┌────┴────┐
   │ MariaDB │      │  Redis  │      │  MinIO  │
   │   DB    │      │  Cache  │      │ Storage │
   └─────────┘      └─────────┘      └─────────┘

All components run in Docker containers. Deploy anywhere you can run docker compose up -d.

Compared to Alternatives

Feature PH Agent Hub Dify Onyx Open WebUI
True multi-tenant ✅ Native ✅ Workspace ✅ Org ❌ Multi-user
Admin UI ✅ Full ✅ Full ✅ Full ⚠️ Basic
BYOK ✅ Per tenant ✅ Workspace ✅ Per org ✅ Per user
DeepSeek stabilizer ✅ Unique ❌ ❌ ❌
Session branching ✅ Native ❌ ❌ ❌
Embeddable widget ✅ Built-in ❌ ✅ ✅
RAG ⚠️ Coming ✅ ✅ ✅
Visual workflows ❌ ✅ ❌ ❌
License MIT Apache 2.0 MIT Custom
Docker deployment ✅ ✅ ✅ ✅

Who Is It For?

  • Consultancies & Agencies — manage AI for multiple clients from one platform, with full tenant isolation
  • IT Teams — deploy a self-hosted AI assistant for your organization, with admin controls
  • SaaS Providers — white-label AI chat for your customers
  • Developers — build and test AI agents with a clean, containerized platform
  • Anyone who values privacy — keep your data on your own server

Get Started

PH Agent Hub is free and open-source (MIT license) for up to 3 tenants. Deploy it in minutes:

git clone https://github.com/kainotomo/ph-agent-hub.git
cd ph-agent-hub
cp infrastructure/.env.example .env
docker compose -f infrastructure/docker-compose.prod.yml up -d

Pricing Options

Plan Price What You Get
Free 🆓 €0 Self-hosted, up to 3 tenants, all features
Pro 💼 €299/year Self-hosted, unlimited tenants, priority support
Cloud Hosted ☁️ €49/month We host and manage it for you, 1+ tenants

Try the Demo

Experience PH Agent Hub live — no installation required:

👉 agent.kainotomo.com/demo

What's Next

PH Agent Hub is actively developed (v1.11.3, 411+ commits). Here's what's coming:

  • MCP (Model Context Protocol) support — connect thousands of community tools
  • Ollama integration — run fully local AI models
  • RAG capabilities — chat with your documents
  • API access for tenants — build custom integrations
  • Plugin system — extend the platform without modifying core code

We'd Love Your Feedback

PH Agent Hub is a tool we built for ourselves, and we're sharing it because we believe others need it too.

PH Agent Hub — Multi-tenant AI, self-hosted and under your control.