“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
NFT development company. Built for use, not for hype.
We are an NFT development company for businesses that issue certificates, memberships and tickets, with the right standard, durable metadata and rules for who can transfer each token.
They trust Metlabs with their blockchain projects
NFT
How do businesses use NFTs?
To issue a unique, verifiable right such as a certificate, a membership, a ticket or a product warranty. The NFT is an ownership record anyone can check on the network, and its metadata states what it represents. What the holder can do with it is set by the contract and backed by the issuer.
14.5M+
NFTs minted across 4,000 Ticketmaster events
Ticketmaster · 2023
500,000+
NFL commemorative ticket NFTs in 2021
Ticketmaster · 2022
Dec 2024
MiCA applies, with unique NFTs out of scope
MiCA Regulation · 2023
What's included
What our NFT development services include.
A business NFT has to keep working after the campaign ends. Every piece settles what it represents, where its data lives and what its holder can do.
Collection design
What each token represents, who issues it and which right it gives the holder against your company.
ERC-721 and ERC-1155 contracts
Contracts on OpenZeppelin with minting roles, supply caps and ERC-2981 royalty information.
Durable metadata
Metadata and media on IPFS or your own storage, with content pinned and verifiable over time.
Transfer permissions
Transferable tokens, bound to the holder with ERC-5192 or limited to approved recipients.
Minting and redemption
Bulk minting, claims by link or QR code and redemption at the venue or store from your own app.
Wallets for everyone
Embedded email wallets, with gas covered by your company, for users without a wallet of their own.
Architecture decision
ERC-721, ERC-1155 or soulbound?
This decision sets what the holder can do and what minting costs. ERC-721 gives unique tokens, ERC-1155 groups several token types in one contract and an ERC-5192 soulbound token binds it to a single account.
| Criterion | ERC-721 | ERC-1155 | Soulbound (ERC-5192) |
|---|---|---|---|
| What it represents | One unique token per id, with its own holder. | Several token types per contract, each with its supply. | A unique ERC-721 bound to a single account. |
| Transfers | Free, unless the contract restricts them. | Free, including batches with safeBatchTransferFrom. | Locked. Transfer functions revert. |
| Minting at scale | One operation per token, unless extended with ERC-721A. | Several ids and amounts in a single transaction. | Like ERC-721, minted already locked to the holder. |
| Typical fit | Unique certificates, warranties and numbered memberships. | Ticket tiers, editions and in-game items. | Degrees, credentials and personal accreditations. |
A soulbound token cannot be recovered on its own if the holder loses the wallet. We design issuer burn and reissue from day one.
Methodology
How we develop your NFTs.
Four phases, each with a concrete deliverable. We decide what every token represents before writing code, and no collection reaches mainnet without a test mint.
A document with what each token represents, its metadata, who mints it and what stays off the network.
We design the claim, wallet and redemption screens in Figma for users with no prior experience.
Contracts on OpenZeppelin with roles, supply caps and pinned metadata, reviewed in a pull request.
Tests and invariants with Foundry, Slither analysis and a test mint on a testnet before mainnet.
Tools for NFTs that last.
ERC standards on audited libraries, testing with Foundry, metadata on IPFS and EVM networks with low minting costs.
- Solidity
The smart contract language for verifiable rules on EVM networks.
- OpenZeppelin
Audited Solidity contracts for tokens, access control and upgradeable systems.
- Foundry
Solidity tests, invariant fuzzing and command-line tooling for EVM networks.
- IPFS
Verifiable content storage addressed through content identifiers (CIDs).
- Polygon
Polygon PoS: EVM contracts secured by its own validators, with low fees.
- Base
An EVM layer 2 on the OP Stack with tools for building applications.
Use cases
Where we apply NFTs.
An NFT adds value when a right has to be unique, verifiable by a third party and sometimes transferable under rules.
Tickets and accreditation
Tickets with resale limits enforced by the contract and a collectible that arrives after the event.
Blockchain for Pro Sports
Academic credentials
Soulbound diplomas an employer verifies on the network without requesting a certified copy.
Blockchain for Education
Warranty and authenticity
One token per item with its origin and warranty, passed to the buyer together with the product.
Blockchain for Fashion & Luxury
Fan memberships
Member passes that unlock presales, content or experiences depending on each fan's tier.
Blockchain for Music & Media
Reviews
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
Team
In-house blockchain development team
Metlabs is a blockchain development company based in A Coruña, Spain. An in-house team covers every part of the project, from product and engineering to infrastructure and legal fit. The people who design your architecture write, test and deploy the code.
Meet the team- Projects in production
- +30
- In tokenized assets
- +$40M
- In‑house development
- 100%
Isaac González
Head of Innovation
Carlos Peña
Full Stack Engineer
Pablo Castro
DevOps Engineer
Helena Ramos
Product Designer
Javier Yáñez
Legal
Security
Security in NFT development
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
Blockchain development
More blockchain development services.
Connect your operations
Represent assets and rights
Blog
Related articles
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Let's build the rails for your product.
Tell us which right you want to issue and who will use it. We start with the collection and the standard that best supports it.
