> For the complete documentation index, see [llms.txt](https://qualitax.gitbook.io/interop/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://qualitax.gitbook.io/interop/bridging-approaches/shared-sequencer.md).

# Shared Sequencer

Shared sequencers can make cross-rollup interoperability faster and cheaper. Interoperability between rollups (messaging) is a separate process from the sequencer tx ordering and batching.

**Drawbacks:** 

However depending on the number of rollups using a shared sequencer, cross-chain communication or liquidity transfers may be more efficient via third-party bridges than sequencers in some cases.

 Source: @ayyyeandy from The Rollup