Fireblocks is a digital asset infrastructure company. It sells the software that banks, exchanges, payment firms and fintechs use to create wallets, sign transactions and connect to each other. Wallets cover only part of the job, though. A business also needs someone to quote prices, execute orders and send euros or pounds to a bank account, and Fireblocks leaves those roles to third parties on its network.
That gap is why people search for a Fireblocks alternative. This article looks at CEX.IO Prime, a provider that holds client assets and supplies the liquidity behind them, and compares it with Fireblocks on custody, trading, fiat, security and cost.
What is Fireblocks, and how does it work?
Fireblocks is a technology platform for storing, moving and managing digital assets. A client opens a Fireblocks workspace, creates wallets inside it and controls them through an API and SDKs. Fireblocks secures each wallet with multi-party computation (MPC) and spreads key shares across separate environments, so no single point can expose a private key. The company says more than 2,400 institutions connect through its network.
The product range has grown well beyond wallets:
- Treasury wallets, embedded wallets for end users, cold wallets and wallet-as-a-service.
- A Policy Engine that sets approval quorums, transaction limits and custom rules.
- The Fireblocks Network, which links clients with exchanges, liquidity providers, market makers, banks and stablecoin services.
- Payment tools, including a Network for Payments that reaches more than 40 providers and 60+ currencies.
- Tokenisation, staking, stablecoin earn and an Off Exchange product for collateral that stays outside exchanges.
- Qualified custody through Fireblocks Trust Company, LLC.
The key point for this comparison sits in the Network. Fireblocks connects a client to hundreds of liquidity providers and market makers, and the network page describes Fireblocks as the connector. It does not present Fireblocks as the party that quotes prices or takes the other side of a trade. The client chooses which counterparties to work with.
Fireblocks also publishes its pricing. The Essentials plan costs $999 per month, and custom plans start at $36,000 per year, according to the Fireblocks pricing page.
Why look for a Fireblocks alternative?
A Fireblocks alternative is a custody provider that also delivers the services Fireblocks leaves to partners, such as liquidity, fiat accounts and settlement. Companies tend to start looking for one in these situations:
- They want one counterparty that both holds the assets and fills the orders.
- They do not want to run wallet infrastructure, signing devices and approval policies with an in-house team.
- They need EUR, GBP and USD accounts that sit next to their crypto holdings.
- They want to trade large blocks through a personal account manager.
- They want trades, transfers and custody in one statement.
Much depends on how much of the stack a company wants to own. A large exchange with a big engineering team may prefer the control that Fireblocks gives. A payment firm or a broker with a small crypto team may prefer to hand the whole chain to one regulated provider.
CEX.IO Prime vs Fireblocks Summary
The two companies sit in different layers of the market, so some rows compare different kinds of service. All facts come from each company’s website and product materials. Confirm the terms for your jurisdiction with the provider.
| CEX.IO Prime | Fireblocks | |
|---|---|---|
| Type of provider | Liquidity provider and custodian under one account | Infrastructure software with a network of third-party providers |
| Custody model | MPC custody run by Prime, with sub-accounts per client or business line | MPC wallets the client operates, plus qualified custody at Fireblocks Trust Company |
| Liquidity | One order book across 15+ trading venues, RFQ, Instant Convert, OTC desk | Access to third-party liquidity providers and market makers through the Fireblocks Network |
| Fiat | USD, EUR and GBP accounts over SWIFT, SEPA, SEPA Instant and Faster Payments, same day | Network for Payments with 40+ providers and 60+ currencies |
| Blockchain coverage | 500+ assets across 60+ networks | 200+ blockchains |
| Connectivity | FIX 4.4, REST, WebSocket, webhooks, sandbox, web portal | API and SDKs |
| Security credentials | PCI DSS Level 1 | SOC 2 Type 2, ISO 27001, CCSS Level 3 |
| Pricing | Not published | Essentials at $999 per month, custom plans from $36,000 per year |
| Public trading limits | Order limits for every pair on prime.cex.io/markets | Not applicable. Fireblocks runs no order book |
| Regulation | FinCEN MSB, US state money transmitter licences, FCA registration, VASP registration in Spain, FINTRAC MSB, Bermuda DABL licence | NYDFS limited purpose trust charter for Fireblocks Trust Company |
CEX.IO Prime
CEX.IO Prime is an institutional account from CEX.IO Group that holds a client’s digital assets and gives direct access to liquidity, fiat rails and reporting. The group has operated the CEX.IO exchange since 2013. Prime extends that exchange’s infrastructure to businesses, so custody and trading come from the same provider.
Aggregated liquidity
Liquidity is the part a wallet platform cannot supply on its own. Prime draws on more than 15 trading venues, from major exchanges to top-tier liquidity providers, and merges their depth into one order book. The routing engine breaks a large order into pieces, routes each piece to whichever venue prices it best and hands the client back a single fill. When two assets have no direct market, Prime routes the trade through a third asset.
A client can trade in four ways from the same account. It can work orders against the aggregated book, lock a conversion rate for a short window through Instant Convert, request a quote for a larger ticket through RFQ, or give a block to the assisted OTC desk. Prime books each trade against the same holdings that its custody secures, so the client does not move assets from a wallet to a venue before it trades.
OTC desk
The OTC desk handles negotiated blocks that a client prefers to keep off the public book. Prime turns on OTC access separately for each client. The process runs as follows:
- The client tells its account manager the asset, the direction, the amount and the settlement asset.
- The account manager asks the Prime trading desk or an external liquidity provider for a price.
- The account manager sends the quote and states how long it stays valid.
- The client approves the quote in writing within that time.
- The account manager executes the block away from the order book.
- The internal ledger updates the client’s account, and the trade enters the standard reports.
The quote and the written approval form a paper trail for each block. Risk and compliance teams can match every OTC trade to the exact message that authorised it.
Fiat and crypto settlement
A Prime account holds USD, EUR and GBP next to crypto. Money arrives and leaves over SEPA, SEPA Instant, Faster Payments, SWIFT and domestic and international wires. Crypto moves on more than 60 networks, and fiat and crypto settle the same day.
That setup removes a step that wallet infrastructure leaves open. A platform that collects crypto from customers can send it to its Prime deposit address, convert it to euros through the Trade API and withdraw the euros to its own bank, all inside one integration. Webhooks report each state change, so the platform can automate the full cycle. Between Prime clients, CEX.IO Pay sends fiat or crypto instantly and free of charge. An employer can use it to pay contractors who hold Prime accounts from a dedicated payroll sub-account.
Accounts, custody and control
Prime keeps client assets in MPC custody, where several parties must take part in every signature. Prime runs the custody infrastructure, so the client gets custody-grade safekeeping without building it. The client still sets the rules. It decides who can trade, who can withdraw and how many people must approve each withdrawal, with single, dual or threshold approval. Every withdrawal goes to a whitelisted address, and role permissions, SSO and 2FA protect each login.
Sub-accounts give each end user or business line its own space. A crypto savings app can open one sub-account per user, each with its own BTC and USDT deposit addresses. Deposits land in the right sub-account automatically, and internal moves between sub-accounts happen instantly at no cost. Prime reconciles holdings against the blockchain continuously and logs every action. All activity lands in a single ledger, and accountants can export statements for the whole account or for one sub-account, by hand or over the API.
Financing
Prime can extend credit to clients that pass its due diligence and risk review. A client can receive a credit line at account level with same-day settlement, or a collateralised loan against fiat, stablecoins, BTC or ETH. Prime values the collateral in real time and applies margin and liquidation terms from the signed agreement.
Connectivity, security and licences
Engineers can connect over FIX 4.4, REST or WebSocket and test every flow in a sandbox first. Webhooks push events to the client’s systems, and the web portal gives operations staff a screen for the same account. A named account manager looks after each client, and the institutional desk works around the clock.
Prime posts its trading rules openly. On prime.cex.io/markets anyone can see the minimum and maximum order size, the lot step and the price precision for every pair.
CEX.io LTD completed a PCI DSS Level 1 assessment for service providers and received the certificate in March 2026. The group also operates under several regimes. In the US it holds FinCEN MSB registration and state money transmitter licences. It holds an FCA registration in the UK, a VASP registration with the Bank of Spain, a FINTRAC registration in Canada and a digital asset business licence in Bermuda. The CEX.IO Licenses and Registrations page lists the legal entities behind these.
CEX.IO Prime Pros and Cons
Prime suits companies that want a provider to hold their assets and trade them in the same place. It is a weaker match for teams that want to build and run their own wallet stack, which is the job Fireblocks specialises in.
Pros:
- Custody, liquidity, fiat rails and reporting from one counterparty.
- Custody infrastructure the client does not have to build.
- Same-day settlement in USD, EUR and GBP.
- Firm OTC quotes with written approval.
- Per-user sub-accounts with automatic deposit attribution.
- Public order limits and PCI DSS Level 1 certification.
Cons:
- Prime does not publish a fee schedule.
- Prime materials list no tokenisation or DeFi tools.
- OTC and financing require a separate approval.
Why do businesses choose CEX.IO Prime?
A company that runs its wallets on Fireblocks still needs trading venues, liquidity providers and banking partners, and it connects to each of them separately. Each of those relationships brings its own onboarding, its own compliance review and its own reports. Prime folds them into one relationship. A neobroker can map each customer to a sub-account and send orders through the Prime API. A wallet app can offer swaps through Convert-as-a-Service and let Prime handle the pairs that need a third asset. A desk can source blocks through the OTC desk and see them in the same statement as its order-book trades.
Fireblocks
Fireblocks gives institutions the tools to run their own digital asset operations. Its MPC technology splits key shares across separate environments, and secure enclaves and hardware security modules protect the most sensitive operations. Approvers sign off sensitive operations on mobile devices with Face ID and a PIN.
Governance runs through the Policy Engine. A client defines who can move which assets, up to what amount, with how many approvals. Fireblocks holds a SOC 2 Type 2 report with zero material findings and ISO 27001 certification, and it describes itself as the first company to earn C4 CCSS QSP Level 3 certification.
The Fireblocks Network links more than 2,400 fintechs, retail apps, payment firms, banks, exchanges and trading firms. Clients use it to settle trades and send stablecoin payments to verified counterparties. Off Exchange lets a trader keep principal in an MPC wallet and mirror collateral to supported exchanges, which reduces exchange counterparty risk.
In 2024 Fireblocks launched Fireblocks Trust Company, LLC, which holds a limited purpose trust charter from the New York State Department of Financial Services. The trust company offers qualified custody with segregated, bankruptcy-remote holdings for asset managers, prime brokers, ETF issuers, foundations and banks. Fireblocks names FalconX, Galaxy, Bakkt and Castle Island among its trust clients.
Fireblocks Pros and Cons
Fireblocks fits firms that want full control over wallets and policies and have the engineers to run them. Firms that want a single provider for custody and execution will need to add partners around it.
Pros:
- MPC wallet technology across 200+ blockchains.
- A detailed Policy Engine for approvals and limits.
- SOC 2 Type 2, ISO 27001 and CCSS Level 3 credentials.
- A large network of counterparties for settlement and payments.
- Published pricing, with an entry plan at $999 per month.
Cons:
- Fireblocks connects clients to liquidity providers and does not quote prices itself.
- Fiat services come through partner providers on its payments network.
- Off Exchange, staking and cold wallets sit in add-ons on the Essentials plan.
CEX.IO Prime vs Fireblocks Head to Head
Custody model
Fireblocks gives the client the keys to its own operation, with MPC wallets, a policy engine and an optional qualified custodian in New York. CEX.IO Prime runs custody for the client and lets it set the rules through approvals, whitelists and sub-accounts. Teams that want to own their wallet stack will prefer Fireblocks. Teams that want a provider to run custody for them will prefer CEX.IO Prime.
Liquidity and execution
CEX.IO Prime executes orders for the client as one counterparty, through the aggregated book, RFQ, Instant Convert or the OTC desk. Fireblocks connects clients to outside liquidity providers, and each one sets its own prices and terms. For direct access to liquidity on the same account that holds the assets, CEX.IO Prime has the edge.
Fiat rails
Prime holds USD, EUR and GBP on the client’s own account and settles them the same day. Fireblocks reaches 60+ currencies through partner providers on its payments network. A firm that wants many currencies through partners may lean to Fireblocks. A firm that wants dollar, euro and sterling accounts with its crypto provider will lean to CEX.IO Prime.
Security credentials
Fireblocks lists SOC 2 Type 2, ISO 27001 and CCSS Level 3. CEX.io LTD holds PCI DSS Level 1. Buyers who score vendors on security frameworks will find a longer list at Fireblocks.
Pricing transparency
Fireblocks publishes plan prices on its website. CEX.IO Prime keeps its fees out of public view and posts trading limits for each pair. On published prices, Fireblocks gives more upfront detail. On published trading rules, CEX.IO Prime does.
How to choose between CEX.IO Prime and Fireblocks
Ask one question first. Do you want to run crypto infrastructure, or do you want to use it? The answer usually points to the right provider.
Choose CEX.IO Prime if:
- You want custody and liquidity from one counterparty.
- You prefer not to build custody infrastructure in house.
- You need same-day USD, EUR and GBP settlement next to your crypto.
- You want sub-accounts for each customer with automatic deposit attribution.
Choose Fireblocks if:
- You have engineers who will build and run your wallet stack.
- You want to choose and switch between many liquidity providers.
- You need tokenisation, DeFi security tools or embedded wallets for end users.
The two can also work side by side. A company can keep its Fireblocks wallets and add Prime as a liquidity and fiat provider.
FAQ
What is the best Fireblocks alternative?
CEX.IO Prime is a strong Fireblocks alternative for businesses that want custody, liquidity and fiat settlement from one provider. Firms that want to operate their own MPC wallets and choose their own counterparties may still find Fireblocks a better fit.
Who are Fireblocks’ main competitors?
Fireblocks competes with other custody and wallet infrastructure providers, and with platforms that bundle custody and trading. CEX.IO Prime belongs to the second group, because it holds assets and supplies liquidity on the same account.
Does Fireblocks provide liquidity?
Fireblocks connects clients to hundreds of liquidity providers and market makers through the Fireblocks Network. Its network page describes Fireblocks as the connector and does not present it as a trading counterparty. Clients trade with the providers they choose.
Is Fireblocks a qualified custodian?
Fireblocks offers qualified custody through Fireblocks Trust Company, LLC, which holds a limited purpose trust charter from the New York State Department of Financial Services. Its standard platform gives clients MPC wallets that they control themselves.
How does CEX.IO Prime protect client assets?
Prime keeps assets in MPC custody, with segregated sub-accounts, mandatory address whitelisting and single, dual or threshold approvals. It reconciles holdings on-chain continuously and logs every action. CEX.io LTD holds PCI DSS Level 1 certification.
How much does Fireblocks cost?
The Fireblocks pricing page lists an Essentials plan at $999 per month and custom plans that start at $36,000 per year. Add-ons cost extra. Off Exchange, for example, costs 3 to 30 basis points on assets under custody.
Can I use CEX.IO Prime together with Fireblocks?
Yes. A company can keep its Fireblocks wallets for its own operations and use Prime for liquidity, OTC blocks and fiat settlement. Both providers support API connections, so the two can run in the same workflow.
Final thoughts
Fireblocks gives teams the tools to build and run their own digital asset operations, with strong security credentials and a wide network of partners. CEX.IO Prime takes a different role. It holds the assets, fills the orders and moves the money in dollars, euros and pounds from one account. For businesses that want custody and liquidity in one place, CEX.IO Prime is the Fireblocks alternative that covers both.
