You want to build a crypto wallet. You Googled the cost. And now you’ve got a range so wide it’s useless – somewhere between $25K and $500K.
That’s not a budget. That’s a shrug.
I’ve built wallets. My team at BeAWhale shipped the Litas crypto wallet from scratch – key management, multi-chain support, the whole thing. So I’m going to walk you through what a wallet actually costs, layer by layer, with real numbers from real builds.
No “it depends” cop-outs. Just math.
The “MetaMask clone” trap…
Half the quotes you’ll get from agencies will reference MetaMask. “We’ll build you a MetaMask-like wallet for $40K.”
Here’s what they’re not telling you.
MetaMask has 150+ contributors and years of iteration. The “clone” you’re getting is a React Native shell with a single-chain RPC connection and maybe a token list pulled from CoinGecko. That’s not a MetaMask clone. That’s a MetaMask screenshot.
The real question isn’t “how much does a wallet cost.” It’s “what kind of wallet do you actually need, and what are you paying for at each layer.”
Layer 1: Core wallet engine… $15K – $60K
This is the foundation. Key generation, seed phrase management, transaction signing, address derivation. The stuff that, if it breaks, your users lose their money.
A basic single-chain wallet (Ethereum or Solana only) with HD wallet derivation runs $15K – $25K. You’re getting BIP-39 mnemonic generation, private key encryption at rest, and basic send/receive flows.
Multi-chain support is where it jumps. Every new chain isn’t just another API call – it’s a different signing algorithm, different address format, different fee structure. Adding Solana to an EVM wallet isn’t copy-paste. It’s a second wallet engine running in parallel.
Multi-chain (3-5 chains): $35K – $60K. And that’s before you touch the UI.
What inflates this layer in bad quotes: “proprietary key management system.” Unless you’re building hardware-level security, you’re using battle-tested libraries like ethers.js or @solana/web3.js. If someone is charging you $30K for “custom cryptographic key management,” ask them exactly what they’re building that the open-source libraries don’t already handle.
Layer 2: Frontend and UX… $20K – $80K
The wallet’s face. Portfolio view, transaction history, send/receive flows, QR scanning, network switching, token management.
A basic wallet UI (list of tokens, send/receive, transaction history) runs $20K – $35K. Clean, functional, nothing fancy.
A polished wallet UI (portfolio charts, multi-account management, address book, push notifications, biometric auth, dark mode) runs $45K – $80K. This is where most of your user experience lives.
And the part about wallet UX that most agencies skip: wallet UX is where most dApps lose users. A confusing send flow or a gas fee that surprises people mid-transaction? That’s a one-star review and an uninstall. The UI layer isn’t cosmetic. It’s retention.
What inflates this layer: “custom design system.” You need a solid design system, sure. But some agencies will quote $15K – $20K just for the design tokens and component library before a single screen gets built. If your wallet has 8-12 screens, a focused design sprint should cost $8K – $12K. Anything more and you’re paying for process, not output.
Layer 3: Blockchain integration and backend… $15K – $55K
This is the plumbing. Node connections, balance fetching, transaction broadcasting, fee estimation, token detection, price feeds.
If you’re going single-chain with a third-party node provider (Alchemy, Infura, QuickNode), this is straightforward: $15K – $25K. You’re piping RPC calls and parsing responses.
Multi-chain with custom indexing, WebSocket connections for real-time updates, and cross-chain transaction tracking: $35K – $55K. This is also where DeFi integrations start creeping in – swap aggregators, staking interfaces, lending protocol hooks. Every DeFi protocol you integrate is another $5K – $15K on top.
The hidden cost here is infrastructure. Node provider fees, indexer services, API rate limits – these are ongoing. Budget $500 – $2,000/month for a multi-chain wallet in production. Nobody puts this in the initial quote.
What inflates this layer: “custom blockchain node infrastructure.” Unless you’re processing millions of transactions, you don’t need your own nodes. Alchemy’s free tier handles most MVPs. Agencies that insist on dedicated node infrastructure from day one are solving tomorrow’s problem with today’s money.
Layer 4: Security and audit… $10K – $50K
This is non-negotiable. A wallet that handles private keys without a security audit is a ticking time bomb.
The security layer includes: encrypted key storage, biometric authentication, session management, anti-phishing measures, transaction simulation (show users what a transaction will actually do before they sign), and the audit itself.
Security implementation: $10K – $25K. This covers the engineering work – secure enclave integration on mobile, encrypted storage, rate limiting, session timeouts.
Smart contract audit (if your wallet has any on-chain logic – swap routing, account abstraction, multisig): $8K – $30K depending on complexity. A wallet with no on-chain logic still needs a security review of the key management layer, which runs $5K – $15K.
The Bybit hack – $1.5 billion stolen in 2025 – wasn’t a smart contract exploit. It was a UI manipulation attack. The signing interface showed one thing, the transaction did another. Wallet security isn’t just about the crypto. It’s about what your users see and trust.
What inflates this layer: “military-grade encryption.” Marketing term. AES-256 is AES-256 whether you call it military-grade or not. What matters is the implementation – how keys are stored, how sessions are managed, how the signing flow prevents blind signing. Ask for specifics, not adjectives.
The real cost by wallet type…
Here’s what it actually costs to build each type, all four layers combined:
Basic single-chain wallet (send/receive, token list, transaction history): $60K – $120K. Timeline: 3-4 months. Good for: MVP validation, single-ecosystem play.
Multi-chain consumer wallet (3-5 chains, portfolio view, DeFi basics, push notifications): $120K – $220K. Timeline: 5-8 months. This is where most funded projects land.
Full-featured DeFi wallet (cross-chain swaps, staking, NFT gallery, dApp browser, account abstraction): $200K – $350K+. Timeline: 8-12 months. This is MetaMask/Phantom territory. If someone quotes you under $150K for this, they’re either cutting security or planning to bill the difference as “change requests.” And if you’re thinking about adding blockchain game integration or in-wallet GameFi features, add another $30K – $60K on top.
Hardware wallet companion app (pairs with a hardware device, firmware integration): $80K – $160K. Timeline: 4-6 months. But the hardware development is a separate budget entirely.
Where agencies pad the quote…
I’ve reviewed enough competitor quotes to know the patterns. Here’s where the markup hides:
“Blockchain research and architecture” as a $10K – $20K line item. This is discovery and planning. It should be baked into the development cost, not a separate charge. If an agency needs $20K to figure out how to build your wallet before they start building it, they haven’t built enough wallets.
Per-chain pricing without shared infrastructure. A good multi-chain architecture shares 60-70% of the backend across chains. If you’re getting quoted per-chain pricing that adds up linearly ($30K per chain x 5 chains = $150K), the architecture is wrong – or the agency wants it to be wrong because linear pricing pays better. This is the same trick I see in blockchain development quotes across every vertical – linear pricing on shared work.
“Custom token standard support” that’s really just ERC-20 and SPL parsing. Every EVM wallet needs to parse ERC-20 tokens. That’s table stakes, not a feature you should be charged extra for.
Post-launch maintenance at 20-25% of build cost per year. Industry standard is 15-20%. And the first couple months should be covered by your warranty. At BeAWhale, we include 2 months of free post-launch support and a 5-year warranty on everything we build. That’s not charity – it’s accountability. If we built it wrong, we should fix it on our dime.
When you DON’T need a custom wallet…
Real talk. Not every project needs a from-scratch wallet.
If you’re building a DeFi protocol or NFT marketplace, you probably don’t need your own wallet. WalletConnect and RainbowKit let users bring their own wallet. Building a custom one just to hold your own token is like building a custom browser just to access your website.
If you need basic token custody with a branded UI, white-label wallet SDKs (Fireblocks, Magic, Web3Auth) start at $500 – $2,000/month and handle the scary parts – key management, compliance, recovery – for you. Total build cost for a branded wrapper: $15K – $40K.
Build custom when: you need proprietary security features, custom transaction flows, deep protocol integration, or the wallet IS the product (like Phantom for Solana). If you’re not sure, run through a proper MVP checklist first – it’ll save you from building something nobody asked for.
The post-launch math nobody mentions…
Your wallet doesn’t stop costing money at launch.
Month 1-2: Bug fixes, performance tuning, user feedback loops. If your agency includes post-launch support, this is free. If they don’t, budget $5K – $10K.
Ongoing monthly costs: – Node provider fees: $200 – $1,500/month – Price feed APIs: $100 – $500/month – Push notification services: $50 – $200/month – App store fees: $100 – $300/year – Security monitoring: $500 – $1,500/month – Ongoing development (features, chain additions): $5K – $15K/month if active
Steady-state for a live multi-chain wallet: $3K – $8K/month minimum. Plan for it. I’ve written the full post-launch cost breakdown if you want the line-by-line version.
Year 1 total cost of ownership for a mid-tier multi-chain wallet: $150K – $300K (build + 10 months of operations). That’s the real number. The build quote is half the story.
The clean quote checklist…
Before you sign anything, your wallet development quote should break down into these four layers:
1. Core wallet engine (key management, signing, derivation) – with chain-by-chain scope 2. Frontend and UX – with screen count and design deliverables 3. Backend and integration – with node strategy and ongoing infra costs listed separately 4. Security and audit – with the audit firm named and scope defined
If the quote is one lump number with no layer breakdown, that’s your first red flag. If the agency can’t explain where your money goes at each layer, they probably can’t explain where your users’ money goes either.
And if the quote doesn’t mention post-launch costs at all? They’re planning to sell you a maintenance contract the day after launch. Ask upfront.
You know where to find us. BeAWhale builds wallets with a 2-week free trial – you see the work before you pay for it. And if you want to know how agencies play games with quotes, grab the free guide.
We’ve helped plenty of founders figure out whether they even need a custom wallet. Sometimes the answer is no – and we’ll tell you that before we bill you. Hit us up and let’s talk numbers.
