Bitcoin Collaborative Custody Compared: Casa, Unchained, and Onramp in 2026

The honest tension at the heart of Bitcoin self-custody is this: the right answer is to hold your own keys, and the right answer is hard. Setting up a single hardware wallet, writing the seed phrase down on paper twice, storing it in two physically separate places — that is not difficult, but it is something. Setting up a 2-of-3 multisig with three different hardware wallets and three different geographic backup locations is a lot of something, particularly the first time.

The result is a predictable middle: people who own enough Bitcoin to take seriously, but who are not full-time Bitcoiners and do not want to become amateur cryptographers. For them, three companies have built businesses around what is called collaborative custody: a setup where you hold most of the keys but a professional service holds one as a backup, and they help you actually use the system without screwing it up.

This article is the head-to-head you cannot get from each company’s own marketing page. Casa, Unchained, and Onramp — what they charge, what they cover, who each one is actually built for, and the threshold at which it makes sense to hire help.

What collaborative custody actually means

The standard collaborative custody setup is a 2-of-3 multisig: three private keys exist, any two of them can sign a transaction. You hold two of the keys (typically two hardware wallets, kept in separate physical locations). The custody service holds the third. To move Bitcoin, you sign with one of your two keys plus either the second of your keys (your normal flow) or, if one of yours is lost or stolen, the service’s key (the recovery flow).

The model has three useful properties. First, the service cannot move your money on its own — it has only one of three keys. Second, you cannot lose your money to a single point of failure: lose one hardware wallet, the other two keys still recover everything. Third, when the inevitable confusion strikes (“wait, which seed phrase goes with which device?”), there is a real human at the service who can talk you through it without ever holding the ability to take your funds.

What collaborative custody is not: it is not custody. The service does not hold your Bitcoin. They hold one signing key out of three, with no ability to move funds without your participation. If the company shut down tomorrow, you would still be able to spend your Bitcoin; you would just need to migrate to a different setup. We covered the broader multisig picture in Bitcoin multisig wallets explained — the present article is specifically about the services that handle the operational side of multisig for you.

The three services, side by side

Casa

Casa is the oldest of the three (launched 2018) and the most consumer-friendly. The product line as of 2026 has three tiers, all 2-of-3 or 3-of-5 multisig, all centered around a clean mobile app:

• Standard — $250/year. 2-of-3 multisig with two of your keys (hardware wallet + Casa-issued mobile-app key) and one Casa-held recovery key.
• Premium — $1,250/year. 3-of-5 multisig (three of yours + a Casa key + an emergency key on a separate device), inheritance support included, dedicated client advisor.
• Private Client — quoted, north of $10,000/year. White-glove setup, in-person meetings available, designed for $5M+ holders.

Casa’s core strength is the user experience. The mobile app makes a 2-of-3 multisig feel close to as easy as a single-signature wallet, which is what most beginners actually need. They include hardware wallet shipping, replacement, and a real human you can call when you are panicking. They also have the most polished inheritance product of the three, with a clear “in case I die” flow that walks heirs through the recovery without requiring them to know what multisig is.

Casa’s weakness is that it is a fixed annual fee regardless of how much Bitcoin you hold. For a $50,000 stack, $250/year is meaningful (0.5%/year). For a $5M stack, the same $250 is rounding error. The pricing aligns better as your stack grows.

Unchained

Unchained (launched 2016, originally called Unchained Capital) is the most institutional of the three. Their core product is collaborative custody, but the company is built around a broader ecosystem: Bitcoin-collateralized loans, a trading desk, an IRA product. The custody product itself is paid quarterly:

• Concierge — ~$250/quarter ($1,000/year). 2-of-3 multisig with two of your hardware wallets plus one Unchained-held key. Includes Unchained Trading Desk access at preferred rates and the option to use the Bitcoin as IRA-eligible collateral.
• Business / Estate / Trust accounts — quoted separately. Designed specifically for entities, not individual holders.

Unchained’s big differentiator is that they let your collaborative-custody Bitcoin do something beyond sitting there. You can borrow against it without giving up the multisig setup, you can trade through their desk, you can hold it in a Bitcoin-only IRA. For someone whose Bitcoin is part of a larger financial life, this is a significant feature; for someone who just wants Bitcoin in a vault, it is overkill.

Unchained’s weakness is that the experience is more spreadsheet-y. The interface is web-first rather than mobile-first, the setup involves more documents, and they assume you are comfortable with a higher cognitive load. That is not a flaw — it matches their audience — but a first-time Bitcoin holder will find Casa more inviting.

Onramp

Onramp (launched 2021) is the newest of the three and built around a slightly different multisig model: a 3-of-5 setup with three independent keys held by three institutional custodians plus two of your own. They call it “multi-institution custody” and pitch it as a step beyond collaborative custody — instead of trusting one company with one key, you have three independent companies each holding one.

• Onramp Multi-Institution Custody — tiered pricing starting around 0.10% of holdings annually, with minimums for the higher-touch tiers. Includes inheritance, advisory access, and tax reporting.

Onramp’s strength is the diversification of trust. If you genuinely worry about the failure of any single custody company, the 3-of-5 multi-institution model is the most paranoid-friendly answer on the market. The flip side is the obvious one: more parties, more onboarding, more documents, and a higher minimum stack to make sense.

The other notable Onramp differentiator is that they offer in-house advisory services — a real person who manages your relationship rather than just a support email. This is similar to Casa’s Premium tier but baked into the standard product. For larger holders, the advisory feature is the actual draw.

Which one fits whom

The honest comparison is not “which one is best” but “which one fits which kind of holder.”

If your stack is between $50,000 and $500,000 and you are not a Bitcoin obsessive: Casa Standard is almost always the right answer. The mobile app, the consumer-grade support, and the predictable annual fee match the use case. Most Casa customers fit this description.

If your stack is over $500,000 and you also borrow, trade, or have IRA money: Unchained is the natural fit because the custody integrates with the rest of their financial product line. Casa Premium is the alternative if the additional Casa polish and the inheritance product matter more than the loan/IRA features.

If your stack is over $1 million and your primary concern is the failure of any one custody company: Onramp’s 3-of-5 multi-institution model is the most defensible setup, particularly if you have already experienced the failure of a single-custody arrangement (FTX, Celsius, etc.) and your appetite for trusting one more company is gone.

If your stack is under $50,000: The honest answer is none of the three. The annual fees are a real percentage of your holdings, and a single hardware wallet with a well-stored seed phrase is the right answer. Use the time and money to read about hardware wallet setup and the basics of inheritance planning instead.

The questions that matter when you actually sign up

Beyond price and brand fit, here are the practical questions every collaborative-custody customer should ask before sending Bitcoin to a new setup. The companies will all answer these, but you have to know to ask.

What happens if the custody company shuts down?

The right answer is: you can spend your Bitcoin without their participation, by combining your two keys (in a 2-of-3 setup). If they cannot give you a clean explanation of the “they go away tomorrow” recovery flow, walk away. Casa, Unchained, and Onramp all have well-documented answers; smaller services often do not.

What is the fee structure for inheritance, and is it included?

Casa Premium and Onramp include inheritance support. Casa Standard does not (it is an add-on). Unchained handles inheritance through their separate trust account product, which is a different SKU. If your reason for using collaborative custody is inheritance, ask explicitly which tier covers it.

How is your key held?

For the company-held key, the answer should be either “hardware security module in a SOC2-audited data center” or some equivalent. For your keys, the question is what hardware wallet they support. All three services support the major wallets (Coldcard, Trezor, Ledger), but if you have a preference (Coldcard is widely considered the best for security-paranoid users), confirm before you sign up.

What does the recovery flow actually look like?

Ideally, you will never need to use it. But ask: if you lost one of your hardware wallets right now, what is the literal sequence of steps to recover? Identity verification, video call, in-person meeting, paperwork? The answer reveals how much friction you are signing up for. Casa is the lowest-friction; Unchained and Onramp involve more documents.

The threshold question

The most useful number to anchor on is this: collaborative custody starts being clearly worth its cost somewhere around $50,000–$100,000 in Bitcoin holdings, depending on which service you use. Below that, the math gets ugly — you are paying 1%+ per year for what is essentially insurance against your own mistakes, and that insurance has cheaper alternatives (a well-designed single-signature setup costs $0/year and is genuinely fine for amounts in this range, as long as you handle the seed phrase correctly).

Above $250,000 or so, the calculus flips. The annual fee is small relative to the holdings, the consequences of a single mistake are real, and the operational support starts being worth its price even if you never have to use the recovery flow. For amounts in the seven-figure range and up, the question is not whether to use collaborative custody but which provider, and the answer is mostly about what you want the service to do besides hold a key.

The shortest possible summary

1. Collaborative custody is a 2-of-3 multisig where you hold two keys and a service holds one. The service cannot move your money on its own and cannot stop you from moving it with your two.
2. Casa is the most user-friendly, mobile-first, and consumer-priced. Best for $50,000–$500,000 holders who want a clean experience.
3. Unchained is the most institutional and integrates loans, trading, and IRAs. Best for larger holders whose Bitcoin is part of a broader financial life.
4. Onramp is the most paranoid-friendly with a 3-of-5 multi-institution model. Best for $1M+ holders whose primary worry is the failure of any single custody company.
5. Below ~$50,000, none of the three is a good fit; a properly set-up single-signature hardware wallet is the right answer.

The whole point of collaborative custody is to lower the operational risk of self-custody without giving up the ownership properties that made you choose Bitcoin in the first place. Pick the service that matches where you actually are — not where your favorite Bitcoin podcaster is.