Smart contract development services turn a product idea into contracts that run on a blockchain: design, code, tests, deployment scripts and documentation, plus the interface and services around them when you need them. On smart-contract.com, you describe your project once and receive comparable quotes from vetted developers and blockchain studios.
The service is free for clients and you commit to nothing until you choose a vendor. The platform does not write code itself: it prepares the brief, invites matching developers, keeps quotes in one format and keeps the audit that follows independent of the team that built the code.
What smart contract development covers
A development engagement should deliver more than contracts that compile. Ask for each of these items in the brief, and check that every quote covers them:
- Specification and architecture: roles and permissions, flows of funds, upgrade strategy, external dependencies and known limitations, agreed before coding starts.
- Contracts in the language of the target chain: Solidity or Vyper on EVM chains, Rust on Solana, Move on Sui and Aptos, Cairo on Starknet.
- Tests: unit tests, fuzzing and invariant tests, with coverage stated in the deliverables.
- Deployment: scripts, testnet deployment, then mainnet, with administrative roles held by a multisig rather than a single key.
- Documentation and handover: technical documentation, a frozen commit for the audit, and time planned to fix the audit findings.
- Optional components: a web front end (dApp), a back end or indexer, oracle integration, upgradeable contracts.
Typical projects include tokens, NFT collections, staking and vesting, DAO governance, real-world asset tokenization, DEX or AMM, lending protocols and bridges.
When to hire a smart contract developer
Hiring an external developer makes sense when your team has the product vision but not the blockchain engineering experience, when you need to ship on a date your internal team cannot hold, or when you need a specific skill (a non-EVM language, a lending engine, a bridge) for one project. It also makes sense for a well-defined extension of an existing protocol.
Start with a clear idea of what the contracts must do. You do not need a finished specification: the guided request and its AI-drafted brief help you structure it. The guide on how to write a smart contract brief explains which points matter most.
Freelance developer or blockchain studio
Both can deliver serious work. The choice depends on scope, risk and how much coordination you can handle yourself.
A freelance Solidity developer or small team fits well-scoped work: a token with vesting, an NFT collection, a staking contract, an extension of existing code. You deal directly with the person who writes the code, and the day rate is often lower. Check availability over the whole project, including the fixes after audit, and who replaces them if needed.
A blockchain studio or agency fits larger projects that combine contracts, front end, back end and deployment on several chains. It brings several profiles, project management and quality assurance, at a higher cost. Check who will actually work on your code, and their seniority.
In both cases, the imposed quote format states the team, so you can compare like with like.
How it works on smart-contract.com
- Describe the project once. The guided request asks for the project type, features, chains, options and deadline. An AI drafts a brief that every developer quotes against; you review and edit it before submitting. The minimum budget of a request is 1,000 EUR or USD.
- Review and invitations. The platform reviews the request, then invites up to 6 matching developers automatically.
- Comparable quotes. Every quote follows the same format: price, currency, duration, scope and team. An AI assistant working for you only compares quotes, flags scope gaps and unusual prices; the choice stays yours. You can message each developer separately.
- Contract declaration. The contract is declared and confirmed by both parties. The developer pays a single 10% commission; you pay nothing to the platform. There is no escrow: you pay the developer directly.
- Independent audit. Once development is under way, you can request an audit of the same project in one click. Under the independence rule, enforced in the database, your developer can never be invited to audit it.
What drives the cost of development
In the public indicative model behind the development cost calculator, the project type sets the base effort in developer-days (contracts and tests, EVM chain):
| Project type | Developer-days |
|---|---|
| Token | 5 to 12 |
| NFT collection | 8 to 18 |
| Staking or vesting | 12 to 25 |
| DAO or governance | 15 to 35 |
| Real-world asset tokenization | 25 to 55 |
| DEX or AMM | 40 to 90 |
| Lending protocol | 60 to 130 |
| Bridge | 70 to 150 |
Then come the options (upgradeability +3 to 6 days, oracle +3 to 8, front end +15 to 40, back end +10 to 25), +3 to 6 days per additional chain, a chain factor (EVM 1.0, Move 1.2, Solana 1.25, other chains 1.3) and 15% for project management and QA. Senior day rates in the model range from 300 to 650 EUR in Asia to 800 to 1,400 EUR in North America, with 650 to 1,100 EUR in Western Europe.
With a Western European vendor, on an EVM chain and without options, the model gives about 3,900 to 15,000 EUR for a token, 30,000 to 114,000 EUR for a DEX and 45,000 to 165,000 EUR for a lending protocol. These are orders of magnitude, not quotes; the guide on smart contract development cost details every parameter. Budget the audit and re-audit on top, estimated with the audit cost calculator.
How to choose your developer
Compare the quotes on effort and deliverables before price:
- Scope: same features, same chains, same options, same exclusions.
- Team: names or profiles, seniority, experience with your type of protocol and chain.
- Tests and documentation: stated coverage, types of tests, handover.
- After the audit: how fixes are handled and billed.
- Code ownership: the repository and intellectual property should be yours.
Red flags: a quote without tests, a duration far below the others for the same scope, a vendor who proposes to audit its own code, or who asks for control of the deployment keys after delivery. The guide on how to compare smart contract quotes shows how to read them side by side.
Vendors are vetted for legal existence, authority of the representative, verifiable references and conflicts of interest. You can also browse development studios in the directory.
Development by blockchain
The request matches developers to your target chain and language. Browse vendors active on Ethereum, Polygon, Solana or Aptos.
Get development quotes
Describe what your contracts must do, your chains and your deadline, and request development quotes. You review the AI-drafted brief, then receive comparable quotes from up to 6 vetted developers. Once the code is written, plan a smart contract audit by an independent auditor.