Editorial policy
How listings work
Built on Arc covers Circle's Arc and is not affiliated with Circle. How roles, statuses and flags are decided, and what a paid listing can and cannot buy.
The Editor's Index
Our own shortlist of the clearest examples of real work on Arc. It is unpaid, it cannot be bought, and no paying project has ever been added to it as part of a deal. Index entries carry a warm mark after the name and a warm kicker on their own page.
An Index pick is not an endorsement, a recommendation or investment advice. It means we think the entry is a useful example of what is actually happening.
The 'Builds on Arc' sentence
Every entry gets one editor-written sentence. A self-submitted page shows the project’s own line, labelled as theirs, until we write ours; an entry we source ourselves does not publish until we have written it.
Roles
Each entry has one primary role, describing its relationship to Circle’s Arc blockchain rather than its quality.
Deploys
Deploys means the project runs its own smart contracts on Arc.
Integrates
Integrates means the project connects Arc to a product that already exists, without deploying contracts of its own.
Issues
Issues means the project puts an asset — a stablecoin, a token or a tokenised instrument — on the chain.
Serves
Serves means the project provides infrastructure, such as RPC, indexing, custody or compliance, that other Arc projects depend on.
Operating a founding validator — one of the named organisations Circle selected to run consensus nodes at Arc’s launch — is recorded as a mark, not a role, because running a validator is not the same as shipping a product.
Status and evidence
Four statuses, each carrying a source URL, a short note and the date we checked on Circle’s Arc blockchain.
Live
Live means we observed the product working on Arc for real customers on the date shown.
Testnet
Testnet means the work was observed on Arc testnet only, with no live customer money involved.
Announced
Announced means the project has stated an intent to work with Arc and nothing is observable yet.
Inactive
Inactive means we saw no activity on Arc when we last looked.
Statuses are observations on a date, not permanent judgments. Inactive in particular is reversible: send a source and we re-check.
Flags and the right of response
Three flags can appear after a name on Circle’s Arc directory.
Unverified claim
Unverified claim renders red and means the project states an Arc relationship we cannot source.
Lookalike
Lookalike renders red and means a property imitates an official one, such as a near-identical domain or handle.
Under review
Under review renders neutral and means we have an open question about the entry, not a conclusion.
Flags carry the same evidence standard as statuses. A project can send a response to corrections@builtonarc.app and we publish it on the entry, next to the flag. Flags cannot be removed by payment, and a paid placement is never used to soften a flag notice.
Verification and on-chain checks
Every entry records whether we found an official source, whether the project claims the Arc work itself, and whether we observed a product live to customers — each with a note and a date.
On-chain checks — contract verification, published audit, liquidity lock, reserve attestation — are shown only for projects that deploy or issue, because they have no meaning otherwise. A check marked not applicable is not a negative and is never rendered as one. None of these checks is a security or solvency guarantee.
Entries and placements
Editor’s Index — unpaid, chosen by us, warm mark. Outbound links are ordinary links.
Listing — $249 once, a paid submission, labelled “Listing”. Outbound links carry rel="sponsored". A Listing never affects status, evidence, flags or the Editor’s Index.
Featured — a placement, not a tier: $999 for 30 days, one of three labelled rows above the home directory, ordered by start date and never inside the ranked order. A featured entry keeps whatever tier it has.
What paying buys. A Listing ($249, once) gets your project a page today — your logo, your description, your links, your screenshots — labelled “Listing”, published as soon as our automated checks pass. Featured ($999 for 30 days) adds one of three rows above the home directory. If you’d rather not pay, we may list you anyway: we add projects we can source ourselves, free, and you can claim that page at no cost.
What paying never buys. Your status, the evidence behind it, any flag, a place in the Editor’s Index, or your position in the ranked table. Those are ours, they come from what we observe, and they’re the same for a project that paid and one that didn’t.
What happens when you pay
Your page publishes within minutes of the payment clearing, as long as our automated checks pass. It is labelled self-submitted until a person here has checked it.
Some submissions are held for review instead of publishing. If we decline one, the fee is refunded in full.
A person does the rest: the Editor’s Index, every status change, every flag, and every refund. None of it is automated, and none of it is for sale.
Ownership and disclosure
Built on Arc is operated by Builtonarc.app LLC, an independent company. It is not affiliated with Circle, with Arc, or with any project listed here.
If the operator of this directory ever has a commercial relationship with a listed project, that entry says so on its own page and is held to the same evidence standard as every other.
Questions about ownership or a specific entry go to contact@builtonarc.app.
Corrections
If something here is wrong we would rather fix it than defend it. Send the entry, what is wrong and a source to corrections@builtonarc.app. Corrections re-date the entry so readers can see it was re-checked.
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.
- Does a paid listing improve a project's ranking?
- No. Paid placements are labelled and separated from editorial ranking. They never change a status, a flag, an on-chain check or an Editor's Index pick.
- Does a Listing mean a project is safe?
- No. A Listing is a paid page and a label, nothing more. When we talk about evidence we say observed or confirmed. Nothing here is a safety, security or solvency judgment, or investment advice.
- Can a project get its entry removed?
- We record public information about public projects, so we do not delete entries on request. We will correct anything inaccurate and publish a project's response next to a flag.
- Is Built on Arc affiliated with Circle?
- No. It is an independent directory, not affiliated with, endorsed by or sponsored by Circle Internet Group or Arc.