Arc mainnet · live since 16 Sep 2026

What is actually being built on Arc

Arc mainnet has been live since 16 September 2026. Every project here is checked against a source and dated — so you can see what is running on mainnet, what is still on testnet, and what has only been announced.

Tracked
179
since 2 Sep
Live on Arc
121
on mainnet since 16 Sep
Testnet
5
only seen on testnet (5042002)testnet only (5042002)
Announced
52
named, nothing observed on mainnet yetnamed, not observed

Directory

179 projects · checked against a source and datedHow we rank
179 projects on Circle's Arc blockchain · statuses last checked 28 September 2026
#ProjectWhat it builds on ArcRoleStatusLinksChecked

Questions

Which Arc does this site cover?

Built on Arc covers Circle's Arc, the stablecoin-native Layer-1 blockchain (mainnet chain ID 5042; testnet 5042002) that launched mainnet on 16 September 2026. It does not cover the ARC token, Aave Arc (a 2022 permissioned lending pool), Arc Raiders, Azure Arc or the Arc web browser.

Is Arc mainnet live?

Yes. Circle's Arc mainnet launched on 16 September 2026 (chain ID 5042). Built on Arc tracks which projects are observed on mainnet, which are only on testnet, and which have only been announced.

How is a project's status on Arc decided?

Status reflects what we observed on the date shown, not what a project announced. Every entry carries a dated source you can open and check yourself.

Is Built on Arc affiliated with Circle?

No. Built on Arc is an independent directory of projects building on Circle's Arc blockchain, not affiliated with, endorsed by or sponsored by Circle Internet Group.

Guides

Status logs, comparisons and explainersAll guides