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

# Based Stack

> *The Based Stack makes appchains practical by introducing a variety of features that, when combined in a seamless developer experience, are a tempting choice for app developers.*

One of Spire’s core product offerings is the “Based Stack''. The Based Stack is **a rollup framework** (analogous to the OP Stack, Polygon CDK, and zkSync’s ZK chains) that includes native support for based sequencing and other features. The Based Stack is specially designed to support “**based appchains** ” with single-app rollups instead of general-purpose rollups. In this section, we introduce a few aspects of the Based Stack.