> ## Documentation Index
> Fetch the complete documentation index at: https://docs.bizzyco.ai/llms.txt
> Use this file to discover all available pages before exploring further.
# Core Concepts
> Understand the fundamental concepts behind Bizzy
Before diving deeper into Bizzy, it helps to understand the key concepts that
shape how the platform works. This section covers the building blocks of Bizzy:
how data is organized, how communication flows, how AI does work for you, and
how it all gets paid for.
## Key Concepts
Multi-tenancy, members, and access
People you communicate with and people who buy from you
Multiple businesses inside one organization
Email, SMS, and other channels in one inbox
Work tracking and the Eisenhower priority matrix
File ingestion, RAG indexing, and retrieval
Conversational AI workers — and how they differ from automations
Event-triggered AI workflows
Tiers, consumables, overage rates, and credits
## How It All Fits Together
Bizzy is built around a simple hierarchy:
```mermaid theme={null}
graph TD
A[Organization] --> B[Members]
A --> Bus[Businesses]
A --> D[Contacts]
A --> E[Customers]
A --> G[Automations]
A --> Ag[Agents]
A --> Tk[Tasks]
A --> Fl[Files]
Bus --> C[Email Addresses
& Phone Numbers]
D --> H[Messages]
E --> I[Transactions]
B[Members
users with access]
Bus[Businesses
commercial entities you run]
C[Email & Phone
channels for sending and receiving]
D[Contacts
people you communicate with]
E[Customers
buyers and ongoing relationships]
G[Automations
event-triggered workflows]
Ag[Agents
conversational AI workers]
Tk[Tasks
work to be done]
Fl[Files
indexed documents agents can search]
H[Messages
communications with contacts]
I[Transactions
sales and purchases]
```
**Organizations** are the top-level container. Everything else belongs to an
organization and is isolated from other organizations.
**Members** are users with access to the organization. Each member has a role
that determines their permissions.
**Businesses** are the commercial entities you run *inside* the organization.
Most accounts have one; agencies and holding companies often have several. Each
business has its own profile, offerings, locations, and Stripe connection.
**Email Addresses** and **Phone Numbers** are the connected channels Bizzy uses
to send and receive communications — Google or Microsoft accounts for email,
purchased numbers for SMS and voice.
**Contacts** represent the individuals you communicate with. **Customers** are
contacts you have a commercial relationship with.
**Messages** are the communications themselves, grouped into threads.
**Tasks** are units of work — created by you, by automations, or by agents — and
surface on your home page through the Eisenhower priority matrix.
**Files** are documents you upload. Once indexed, they become a knowledge base
that agents can search via hybrid retrieval (vector + keyword).
**Agents** are conversational AI workers you chat with: configured persona, tool
access, conversation history. **Automations** are event-triggered workflows that
run on their own. Most users mix them up at first — see the
[Agents](/get-started/concepts/agents) page for when to reach for which.
**Credits** are how usage on top of your plan is metered and billed. They don't
appear in the hierarchy because they're not data — they're the meter that runs
over everything.
## Start Learning
If you're new, read these in order:
Start here — how access and data isolation works
The people side of the platform
The most important distinction in Bizzy
How tiers, consumables, and overages work