> For the complete documentation index, see [llms.txt](https://w3block.gitbook.io/w3block-eng/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://w3block.gitbook.io/w3block-eng/start-here/integrated-blockchains.md).

# Integrated Blockchains

### What is a Blockchain? <a href="#what-is-a-blockchain-protocol" id="what-is-a-blockchain-protocol"></a>

Blockchain can be described as a ledger in which transactions can be noted, authenticated, and verified when necessary. What separates it from standard systems, such as the registry office, is that it does not belong to any authority or institution. That is, there is no central server that stores this ledger.

### Which blockchain should you choose? <a href="#which-blockchain-should-you-choose" id="which-blockchain-should-you-choose"></a>

The choice depends on the use case, the main points to remember are transaction fees, market value, adoption, level of decentralization, transaction completion time, governance model, and sustainability.

The Blockchains we currently support are :

* &#x20; Polygon <img src="/files/B4TPfxbzCNsxXwP7lnTC" alt="" data-size="line">
* &#x20; (Coming soon) Ethereum <img src="/files/CFpc0yOANRQRbGo9MFoS" alt="" data-size="line">


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