Payment solution

Zeus: crypto payment solution

The verdict

Wallet-based acceptance Workable with effort Business-process integration Worth considering

Zeus is a self-custodial Lightning wallet and node-control app with a point-of-sale mode: you hold the keys, and how much you operate depends on whether you point it at your own node or use its embedded one.

Who holds the funds
Merchant-controlled
Who holds the keys
Merchant
Self-hosting
Required
Lightning
Yes
Fiat settlement
No
Bank settlement
No

Best for: Bitcoin-forward merchants who want self-custody at the counter and are comfortable with a wallet-based, no-fiat setup.

Poor fit: Merchants who need dollars in the bank, multi-staff back-office roles, or built-in refunds and reporting.

Biggest tradeoff: Zeus gives you genuine self-custody at the point of sale, open-source and no-KYC. The tradeoffs are Bitcoin-only with no fiat settlement, thin merchant back-office (no documented roles, refunds, or exports), and operational work that rises steeply if you run your own node.

Confidence: Medium Last reviewed 2026-07-11

What it is

Zeus is an AGPLv3, self-custodial, Bitcoin-only mobile wallet and Lightning node-control app with a point-of-sale mode. You hold the keys. It can drive your own remote LND or CLN node, run an embedded on-device node backed by its Olympus LSP, and issue Lightning addresses through Zeus Pay.

What it is not

It is not a fiat gateway: it is Bitcoin-only with no conversion or bank settlement. It is not a full merchant back-office: role-based staff accounts, refunds, reporting, and accounting exports are not documented. It is not a hosted custodial service; you are responsible for your keys.

How the payment flow works

A merchant runs Zeus in one of a few modes: pointed at their own node (maximum control and work), an embedded on-device node with liquidity from the Olympus LSP (less work, LSP-dependent), or receiving to a Zeus Pay Lightning address. Payments arrive in Bitcoin to a wallet or node the merchant controls.

Custody, keys, and settlement

The most important thing about any crypto payment solution is who controls the money and what happens if the provider goes away. Here is the structured answer, from primary sources.

Custody
Merchant-controlled
Key control
Merchant
Fiat settlement
No
Bank settlement
No
Settlement timing
Instant
Settles in
Cryptocurrency
Backup and recovery
Merchant

Conversion: Zeus is Bitcoin-only and self-custodial; there is no fiat conversion or bank settlement. Payments arrive to a wallet or node you control.

Getting your money: There is no withdrawal step in own-node mode: funds are already in your node or wallet. In embedded mode, liquidity and redemption depend on Zeus's Olympus LSP.

If the provider or hosted service becomes unavailable

The self-hosted service keeps running if your infrastructure stays up.

If you run your own node, Zeus keeps working as long as your infrastructure does, and funds stay yours. In embedded mode, funds remain self-custodial but liquidity and channel operations depend on Zeus's Olympus LSP, so provider issues can affect payments even though keys stay with you.

What you have to operate

In embedded mode, just the app and its on-device node. In own-node mode, a full Lightning node with channels, liquidity, uptime, and backups: a real, ongoing responsibility.

Ongoing maintenance: Low for embedded mode; substantial (node uptime, channels, backups) if you run your own node.

Support: Community support; open-source project with docs and chat.

Who this is right for

A Bitcoin-forward merchant who wants self-custody at the counter, is comfortable holding Bitcoin rather than dollars, and can handle either the embedded node or, for maximum control, their own node.

Who should skip it

A merchant who needs dollars settled to a bank, multi-staff roles and back-office reporting, or built-in customer refunds.

Our evaluation

Money and control

Who holds your money and keys, whether you get dollars, and what happens if the provider goes away.

What we evaluate Rating Why Confidence
Custody model Who holds your money between the sale and settlement, you or a third party. Excellent Self-custodial: you hold the keys, whether pointed at your own node or the on-device embedded node. High
Settlement Whether you get dollars, crypto, or a choice, and when. Fair Instant Bitcoin settlement to your own wallet or node, but there is no fiat or bank settlement. High
Fiat support Whether you can price and settle in dollars cleanly. Poor Bitcoin-only; no fiat conversion or bank settlement. High
Refunds Whether you can refund a payment, and how. Never inferred from an API. Not confirmed No merchant refund workflow is documented. Low
Security model What you are trusting and what your exposure is: keys, custody, attack surface. Good Self-custody with seed backup; SOC 2 Type II is claimed for the hosted LSP services. Medium

Operations

What running this actually takes day to day, and whether it produces records your books can use.

What we evaluate Rating Why Confidence
Hosting requirements Whether you have to run a server or a node. The biggest burden divider. Fair Embedded mode needs nothing hosted; own-node mode means you run and maintain a Lightning node. Medium
Ease of setup Honest effort to go live, not marketing easy. Fair Embedded node is quick; connecting your own node is a real technical project. Medium
Accounting and records Whether it produces records your books and CPA can use. Not confirmed Only a paid-invoices view is documented; no exports or accounting integrations. Low
Employee workflow What your staff actually have to do, and whether multiple users are supported. Not confirmed No role-based accounts or per-employee PINs are documented. Low
Merchant support Who helps when it breaks, and how good that help is. Fair Community support for an open-source project; no merchant SLA. Low
Offline capability Whether it works when the internet or a node is down. Not confirmed Offline point-of-sale behavior is not documented. Low

Technical capability

What the solution can actually do: Lightning, on-chain, stablecoins, and how extensible it is.

What we evaluate Rating Why Confidence
Lightning support Whether you can take Lightning, and what that requires operationally. Excellent Deep Lightning support with own-node, embedded, and LSP options, plus Lightning addresses via Zeus Pay. High
On-chain support Whether you can take on-chain, with what confirmation and fee reality. Good On-chain Bitcoin is supported alongside Lightning. Medium
Open source Whether you can inspect and self-host it, and whether it is actively maintained. Excellent AGPLv3, fully open-source. High
Operational maturity Whether this is a stable product or an early project. Good An established wallet with production merchant use (for example Pubkey NYC). Medium
Developer ecosystem Whether you can extend it if you need to. Mostly for infrastructure and API-first tools. Fair Nostr Wallet Connect is the closest programmatic surface; no dedicated merchant acceptance API is documented. Low

Cost, clarity, and privacy

What it really costs all in, how clearly that is disclosed, and what using it reveals.

What we evaluate Rating Why Confidence
Fees What it really costs, all in, and how transparent that cost is. Good The app is free; JIT channel opens cost 10k sats or 1%, and Zeus Pay is free. Medium
Documentation quality Whether a merchant can actually learn to run this. Good Structured docs, though several pages 404'd and the standalone-POS claim was unresolved. Medium
Privacy What using this reveals, and to whom: address reuse, KYC, on-chain linkage. Good No KYC and self-custody; Tor support; degrades if using hosted LSP services. Medium

We rate each area on its own. There is no overall score, because averaging areas this different, a self-hosted server's independence against a gateway's convenience, would hide the tradeoff you need to see. How we rate.

Pricing

Setup
$0 (app) (free, open-source app)
Transaction fee
JIT channel: 10k sats or 1% (for just-in-time channel opens (docs))
Network fee
Bitcoin/Lightning network fees

The Zeus app is free and open-source. Just-in-time channel opens via the Olympus LSP cost 10,000 sats or 1%, and Zeus Pay Lightning addresses are free. Running your own node has its own costs. Last verified 2026-07-11.

Limitations

  • Bitcoin-only; no fiat conversion or bank settlement.
  • Thin merchant back-office: no documented roles, refunds, reporting, or accounting exports.
  • Own-node mode is a substantial operational commitment.
  • The standalone (non-Square) POS claim was not fully resolved in documentation.
  • Community support only.

What we are still verifying

We publish what our documentation review supports and mark the rest as unverified. These questions are open. We will answer them with hands-on testing before we treat them as fact.

Open questionCurrent confidence
Is there a fully standalone (non-Square) in-app POS mode? Low
Are there multi-operator or staff accounts? Low
Is there any merchant refund workflow? Low

Is there a fully standalone (non-Square) in-app POS mode?

Why it matters: The README implies one, but the documented flow is Square-integrated; this determines whether Zeus is a standalone register.

Planned lab validation: Test the in-app POS without Square and document the flow.

Are there multi-operator or staff accounts?

Why it matters: Any business with staff needs this and it is undocumented.

Planned lab validation: Inspect the app for role-based or multi-operator features.

Is there any merchant refund workflow?

Why it matters: Refunds are a core need and none is documented.

Planned lab validation: Attempt a refund and document the procedure.

CryptoLic Lab

CryptoLic does not stop at reading documentation. We independently validate what vendors claim by setting things up and running them ourselves, then we publish what we actually observed. For this solution, that hands-on validation is not scheduled. Nothing below is marked verified until we have tested it, so you can trust a "verified" label when you eventually see one.

What we will verifyStatus
Standalone (non-Square) POS mode Pending verification
Own-node vs embedded custody and setup effort Pending verification
Lightning acceptance end to end Pending verification
Multi-operator workflow Pending verification
Refund procedure Pending verification
Reporting and exports Pending verification
Holding your own keys?

If you control the keys, you own the security. The The Merchant Security Playbook covers backups, recovery, and keeping funds safe.

Keeping the books straight?

Whichever solution you choose, the crypto has to reconcile against your books. The The Merchant Accounting & Bookkeeping Toolkit gives you a routine and a clean year-end package for your CPA.

Sources and verification

Last content review 2026-07-11 Documentation verified

Custody
2026-07-11
Settlement
2026-07-11
Pricing
2026-07-11
Availability
2026-07-11
Kyc
2026-07-11
Supported assets
2026-07-11
Integrations
2026-07-11
Refunds
2026-07-11
Open source
2026-07-11
Content reviewed
2026-07-11
Editorial update
2026-07-11

How we verify and date facts.

Change log

  1. 2026-07-11 Initial publication. Documentation review complete; standalone-POS and merchant back-office questions flagged for the lab.

Spotted something out of date? Send a correction. We verify every submission against primary sources; vendor contact never changes a rating.

Questions

Do I hold my own money with Zeus?

Yes. Zeus is self-custodial: you hold the keys, whether you point it at your own node or use its embedded on-device node. No third party holds your Bitcoin.

Can Zeus settle dollars to my bank?

No. Zeus is Bitcoin-only and self-custodial; there is no fiat conversion or bank settlement. Payments arrive in Bitcoin to a wallet or node you control.

How much work is Zeus to run?

It depends on the mode. The embedded node is quick to start and low effort. Connecting your own node gives maximum control but means running a Lightning node with channels, liquidity, and backups, which is a real technical commitment.

How this compares

Every solution we cover is evaluated the same way. Here is where the others land.

SolutionCategoryReadinessThe short version
BTCPay Server Self-hosted acceptance platform R3 Workable with effort BTCPay Server is the reference self-custody answer: free, open-source software that takes Bitcoin and Lightning straight to your own wallet, in exchange for running and maintaining a server.
Blink Wallet-based acceptance R4 Merchant-ready Blink is a polished custodial Lightning wallet with a genuinely easy merchant Cash Register, but its own FAQ excludes US and Puerto Rico merchants, so for our audience it is not usable today.

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