“One of the pioneering firms in web3 solutions, digital assets and tokenization, recognized for its innovation and solid reputation across Spain and Latin America.”
Jorge CorredorLawyer, Rincón Cuéllar & Asociados
We are your blockchain development company in the United States
We build blockchain products for companies in the United States with our in-house team, and from the design stage we separate each function regulated by the SEC, the CFTC, FinCEN and the states.
Tell us about your project
Blockchain development in the United States, from idea to production
We turn your use case into a product that can be launched, operated and extended. The same team designs the architecture, writes the contracts and integrates them with your systems.
Tell us what you want to buildFederal and state rules, from the architecture
Before choosing a network we separate the asset from each function: issuing a security, transmitting funds, holding custody or facilitating trading. Each has its own federal regime and state permissions, and one registration does not cover the rest.
Smart contracts ready for review
We write your business logic with tests and peer review, and prepare the code for an external audit and a progressive deployment before it runs in production.
In English, on your coast's hours
You work in English, or in Spanish if your team prefers. Meetings are set in your hours, whether you are on the East Coast or the West Coast, and the rest moves forward in writing, through shared documentation and a stable technical channel.
A foundation that can keep growing
We document the code and plan deployments and monitoring, so your team can maintain the product and add features on a foundation it knows.
Services
Blockchain development services in the United States
We cover the full Web3 product lifecycle, from idea and MVP through to mainnet, audits and maintenance.
Connect your operations
Represent assets and rights
Use cases
Blockchain use cases in the United States
The United States already requires every package of certain medicines and every lot of leafy greens to be identified, and the SEC has opened a route for tokenized stocks; these cases build on that.
Tokenized stocks
The SEC's temporary order of September 2026 allows certain NMS stocks to trade on TSV venues, with public, auditable smart contracts.
Blockchain for Banking & Finance
Property for accredited investors
Interests in the company that owns a building, offered under SEC Rule 506(c): the offering can be advertised, but every buyer must be a verified accredited investor.
Blockchain for Real Estate
Leafy greens traceability
Fresh leafy greens are on the FDA's Food Traceability List: each lot carries its code and the harvesting, cooling, packing and shipping data.
Blockchain for Agribusiness
Package-level drug tracing
The DSCSA requires certain prescription drugs to be traced package by package: each carries its NDC, serial number, lot and expiry on a machine-readable carrier.
Blockchain for Pharma
Technologies we build blockchain with in the United States
Our stack covers every layer of your product: smart contracts, blockchain networks and integration with your systems. It is what we use to build, test and deploy software tailored to your business.
- Solidity
The smart contract language for verifiable rules on EVM networks.
- Rust
Performance and memory safety for contracts, nodes and Web3 tooling.
- Ethereum
EVM contracts, tokens and final settlement on an open Proof of Stake network.
- Hardhat
An environment to compile, test and deploy contracts on EVM networks from Node.
- Foundry
Solidity tests, invariant fuzzing and command-line tooling for EVM networks.
- Chainlink
Oracles for external data, randomness and cross-chain messaging for contracts.
- Polygon
Polygon PoS: EVM contracts secured by its own validators, with low fees.
- Solana
Programs, accounts and parallel execution on a high-throughput layer 1.
- OpenZeppelin
Audited Solidity contracts for tokens, access control and upgradeable systems.
United States: SEC · CFTC · FinCEN
Blockchain regulatory framework in the United States
In the United States federal and state rules apply side by side, and there is no single licence: the SEC applies securities law, the CFTC supervises commodity derivatives and FinCEN oversees the anti-money laundering obligations of those who transmit funds. States regulate money transmission and, in some cases, virtual currency, as New York does with its BitLicense; banking authorities step in depending on the institution. For payment stablecoins, the GENIUS Act of July 2025 has deferred application, which Treasury expects on 18 January 2027.
See blockchain regulation in the United StatesUS framework
Milestones enabling blockchain in the United States
Federal and state dates that shape what can be built in the United States today, from New York's BitLicense to the tokenized stock exemption. Each milestone links to its source.
See the regulation guide for the United StatesNew York virtual currency framework published
The state register publishes the addition of Part 200 to Title 23 NYCRR. This is the basis of BitLicense, with state-level scope and its own requirements.
New York State Register · 24 June 2015FinCEN guidance on virtual currency business models
The guidance applies the money transmission framework to particular functions and facts. It distinguishes developing software from using it to accept and transmit value for others.
FinCEN · Guidance FIN-2019-G001GENIUS Act enacted
The Act establishes a framework for payment stablecoin issuers, with requirements and deferred application. Enactment and general commencement are different dates.
GovInfo · Public Law 119–27SEC digital asset interpretation becomes effective
The release issued on 17 March is published and becomes effective on 23 March. It distinguishes assets, digital securities and investment contracts.
Official source · Text and dateTemporary tokenized stock trading exemption
Order 34-106402 provides conditional TSV and specified liquidity-provider relief until September 2031, without a general primary issuance exemption.
Official source · Text and date
Reviews in United States
What do our clients think of Metlabs?
“We structured the tokenization of real estate projects with them, and I value the team's ability to understand our corporate needs and genuinely solve them.”
Joan MejíaManager, GLOBYNE
“They advised us on the feasibility of tokenizing real estate assets in Uruguay with direct, cordial treatment. A professional team, responsive and always available.”
Álvaro Silva SantamaríaCEO, Sp Inmuebles
“Great professionals at structuring tokenized projects, with technical command and attention to detail that inspire full confidence at every stage of the work.”
Francisco BetancourtVerified Google review
“As a blockchain lawyer, I value their experience and professionalism in consulting and executing tokenization projects. Technology partners you can fully trust.”
Vanessa RivasBlockchain lawyer, El Salvador
“Great professionals, very attentive to their clients and always mindful of every detail. Working with their team has been a genuine pleasure from start to finish.”
CriptorentVerified Google review
“A very professional yet approachable company that empathizes with your doubts and needs. Highly recommended for entrepreneurs with a tokenization project.”
Javier EspasaTokenization entrepreneur
“Exceptional in every sense. From legal support I value their rigor and transparency: working with Metlabs means professionalism, innovation and security.”
Pedro A. Agúndez MéndezGoogle Local Guide
“Excellent service across blockchain development, asset tokenization and consulting. A very professional team that I recommend wholeheartedly, without reservation.”
José Luis DíazVerified Google review
“I have worked with them on several projects and they are very professional. A guarantee that everything turns out perfectly. Without a doubt, 100% recommended.”
Ignacio Fernández JiménezVerified Google review
“One of the pioneering firms in web3 solutions, digital assets and tokenization, recognized for its innovation and solid reputation across Spain and Latin America.”
Jorge CorredorLawyer, Rincón Cuéllar & Asociados
“Great professionals at structuring tokenized projects, with technical command and attention to detail that inspire full confidence at every stage of the work.”
Francisco BetancourtVerified Google review
“A very professional yet approachable company that empathizes with your doubts and needs. Highly recommended for entrepreneurs with a tokenization project.”
Javier EspasaTokenization entrepreneur
“I have worked with them on several projects and they are very professional. A guarantee that everything turns out perfectly. Without a doubt, 100% recommended.”
Ignacio Fernández JiménezVerified Google review
“We structured the tokenization of real estate projects with them, and I value the team's ability to understand our corporate needs and genuinely solve them.”
Joan MejíaManager, GLOBYNE
“As a blockchain lawyer, I value their experience and professionalism in consulting and executing tokenization projects. Technology partners you can fully trust.”
Vanessa RivasBlockchain lawyer, El Salvador
“Exceptional in every sense. From legal support I value their rigor and transparency: working with Metlabs means professionalism, innovation and security.”
Pedro A. Agúndez MéndezGoogle Local Guide
“They advised us on the feasibility of tokenizing real estate assets in Uruguay with direct, cordial treatment. A professional team, responsive and always available.”
Álvaro Silva SantamaríaCEO, Sp Inmuebles
“Great professionals, very attentive to their clients and always mindful of every detail. Working with their team has been a genuine pleasure from start to finish.”
CriptorentVerified Google review
“Excellent service across blockchain development, asset tokenization and consulting. A very professional team that I recommend wholeheartedly, without reservation.”
José Luis DíazVerified Google review
Security
Security in blockchain development in United States
Every delivery goes through the same checklist before it reaches mainnet. What changes between projects is the depth of each control, because an MVP does not carry the same risk as a contract that holds third-party funds.
Before mainnet
- Roles and permissions defined for every critical function
- Unit and invariant tests, and fuzzing on the logic that moves value
- Static analysis and peer review of every change
- Multisig and timelock on administration when the risk justifies it
- Custody and rotation of the deployment keys agreed
- External audit when the value at risk requires it
We work with leading audit firms
FAQ
Frequently asked questions about blockchain development in United States
What we are asked before a project starts.
Talk to our teamWhich regulations apply to a blockchain project in the United States?
It depends on what the token represents and what each company does. If the token is a security, federal securities law applies, with registration or an exemption before the SEC; accepting and transmitting customer funds may require MSB registration with FinCEN, with its anti-money laundering obligations, and licences in each state served; derivatives go through the CFTC. No permission replaces the others, and operating from outside the country does not by itself remove those obligations. We analyse the fit of your case before writing any code.
Do you work with both startups and established companies?
Yes. We support startups from MVP validation to a product they can take into a funding round, and established companies on tokenization, traceability and digital identity projects with strict compliance requirements. In every case, smart contracts go through tests and review before they reach mainnet.
How do you work with US companies?
In English, or in Spanish if your team prefers, and in direct contact with the people who design and build the product. Meetings go in your team's working hours, whichever coast it is on. The rest moves forward through shared documentation, written decisions and a stable technical channel.
How long does blockchain development take?
It depends on product complexity, the number of integrations and the level of review required. Before development we set scope, dependencies and deliverables for each phase, so you can decide what reaches production first and what waits for a second iteration, without mistaking an MVP for a complete architecture.
Which blockchain network is right for my project?
The one the product requirements call for, not the one that is fashionable. For EVM projects we compare Ethereum, Polygon, Arbitrum or Base on finality, costs, tooling, interoperability, custody and compliance, and we consider non-EVM networks when they fit better. The recommendation covers contracts, indexing, wallets and operations, and takes into account who will use the product.
Let's build the rails for your project in the United States
Tell us about your case and we'll propose architecture, timeline and budget within a week.
Where we work in the United States
We work remotely with teams throughout the country, and on site where the project calls for it.
Territorial coverage
- Alabama
- Alaska
- Arizona
- Arkansas
- California
- North Carolina
- South Carolina
- Colorado
- Connecticut
- North Dakota
- South Dakota
- Delaware
- Florida
- Georgia
- Hawaii
- Idaho
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Louisiana
- Maine
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Mississippi
- Missouri
- Montana
- Nebraska
- Nevada
- New Jersey
- New York
- New Hampshire
- New Mexico
- Ohio
- Oklahoma
- Oregon
- Pennsylvania
- Rhode Island
- Tennessee
- Texas
- Utah
- Vermont
- Virginia
- West Virginia
- Washington
- Wisconsin
- Wyoming
Blog
Articles on securities tokenization
What are the differences between security tokens and utility tokens?
How to distinguish financial rights from service access, what legal classification examines and why a token’s name does not determine its regulation.
OpenZeppelin and ERC-3643: how a security token is built
What OpenZeppelin libraries and ERC-3643 controls provide, and what a securities issuance also requires: rights, permissions, operations and review.
Real Asset Tokenization: How RWA Tokenization Works
How to structure an RWA project: holder rights, issuance, recordkeeping, payments and recovery. What blockchain adds and what depends on the legal arrangement.
Where we are
Blockchain development in the United States and worldwide
Metlabs Offices
Av. García Sabell, 1, Edificio Proa 15009 A Coruña, Spain
We are also your blockchain development company in
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