> ## Documentation Index
> Fetch the complete documentation index at: https://docs.unprice.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Feature Types

> The 4 core pricing models supported by Unprice.

In Unprice, every feature assigned to a plan must have a specific pricing type. This determines how the customer is billed for that specific functionality.

## 1. Flat Pricing

Flat pricing is the simplest model. A fixed fee is charged for the feature, regardless of usage.

* **Example**: "SSO Support" for \$50/month.
* **When to use**: For premium features that are either "on" or "off".

## 2. Tiered Pricing

Tiered pricing allows you to charge different rates based on the volume of usage. Unprice supports two modes:

### Volume Pricing

The price of all units is determined by the highest tier reached.

* **Example**:
  * 1-100 units: \$10 per unit
  * 101+ units: \$8 per unit
  * If a customer uses 150 units, they pay $8 for *all* 150 units ($1,200).

### Graduated Pricing

Units are priced progressively as usage increases through the tiers.

* **Example**:
  * 1-100 units: \$10 per unit
  * 101+ units: \$8 per unit
  * If a customer uses 150 units, they pay $10 for the first 100 units and $8 for the remaining 50 ($1,000 + $400 = \$1,400).

## 3. Usage-Based Pricing

Usage pricing is consumption-based. It can be configured in three ways:

* **Unit**: A simple per-unit price (e.g., \$0.01 per API request).
* **Tier**: Using either Volume or Graduated tiers for consumption.
* **Package**: Billing in groups of units (e.g., \$10 per 1,000 requests).

## 4. Package Pricing

Package pricing bills in fixed bundles. Unlike Usage-Based Package pricing, this is typically used for fixed allotments.

* **Example**: "5 User Seats" bundle for \$20.
* **Logic**: If a customer needs 7 seats, they must buy 2 packages (total \$40), covering up to 10 seats.

## Comparison Table

| Type        | Billing Logic | Common Use Case                     |
| :---------- | :------------ | :---------------------------------- |
| **Flat**    | Fixed amount  | Add-ons, premium support            |
| **Tier**    | Scale-based   | SaaS subscriptions with user levels |
| **Usage**   | Pay-as-you-go | API calls, bandwidth, storage       |
| **Package** | Bundled units | User seats, credits                 |

<Tip>
  You can mix and match these types within a single plan. For example, a "Pro" plan might have a **Flat** base fee, a **Tiered** number of users, and **Usage-based** API requests.
</Tip>