# Bill subscribers with Bolt for SaaS

> Composable checkout APIs, subscription billing, and identity for software companies.

Source: https://help.boltapp.com/use-cases/saas

**Bolt for SaaS** gives software companies modular checkout: identity, payments, fraud, and subscriptions without draining engineering on billing infrastructure.

## Who this is for [#who-this-is-for]

SaaS and subscription businesses building custom checkout, upgrade flows, or in-app billing on top of Bolt APIs.

## What you can do [#what-you-can-do]

* Compose checkout with [Checkout OS](/products/checkout-os)
* Manage plans and renewals with [Subscriptions](/products/subscriptions)
* Authenticate users with [Bolt ID](/products/bolt-id) and [Embeddable Checkout](/products/embeddable-checkout)
* Configure [Custom Payments](/products/custom-payments) for your processor model

## Get started [#get-started]

| Task                   | Link                                                                   |
| ---------------------- | ---------------------------------------------------------------------- |
| Checkout OS overview   | [Checkout OS](/products/checkout-os)                                   |
| Subscriptions API      | [Subscriptions guide](/api-reference/guides/subscriptions)             |
| Embeddable integration | [Embeddable checkout guide](/api-reference/guides/embeddable-checkout) |
| API quickstart         | [API quickstart](/api-reference/api-quickstart)                        |

## Related [#related]

* [Bolt for Digital Goods](/use-cases/digital-goods)
* [Bolt for App Developers](/use-cases/app-developers)
* [Bolt for Startups](/use-cases/startups)