What this Web3 / blockchain budget includes
- Smart contract development + audit
- Web3 wallet integration (MetaMask / WalletConnect)
- Token management (ERC-20 / ERC-721)
- NFT minting interface
- Multi-chain support (Ethereum + Polygon)
- Gas optimization
- DApp frontend (React + ethers.js / wagmi)
- Testnet + mainnet deployment
What drives the cost of a Web3 product?
Smart contract security is the highest-risk item — bugs in deployed contracts are often irreversible and can result in total loss of funds. Internal review + gas optimization is included, but external audits from specialized firms are highly recommended for production and are budgeted separately.
Multi-chain support is cheaper on the second chain because EVM-compatible chains (Polygon, Arbitrum, BNB) can reuse the same Solidity contracts with minimal changes. The DApp frontend is the most similar to traditional web development and uses standard React tooling.
Frequently asked questions
- How much does a blockchain app cost?
- A mid-scope Web3 DApp for LATAM costs around $55,000 USD and takes 6 months with a blended team at ~$45/hour. Smart contract development, wallet integration, and token management are included.
- Does it include smart contract audit?
- Internal security review and gas optimization are included. For production, we strongly recommend an external audit from a specialized firm (Certik, Halborn). External audits cost $15,000–$50,000+ depending on contract complexity and are not in this budget.
- Which blockchains does it support?
- Ethereum mainnet and Polygon (L2) are the primary chains in this budget. Adding additional EVM-compatible chains (Arbitrum, BNB Chain, Avalanche) in phase 2 has lower marginal cost since contracts are already written.
- Does it need KYC?
- Depends on your regulatory context. DeFi protocols typically don't require KYC, but regulated tokenized asset platforms may. See the KYC/AML budget for compliance requirements.