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BEST COMPANIES · CUSTODY

Which are the best crypto custody companies?

Custody is the piece that decides whether a crypto-asset project is viable: who controls the private keys, with which guarantees and under which regulation. Under MiCA, holding crypto-assets on behalf of clients is a service reserved for authorised providers (CASPs). This guide compares regulated custodians, technology providers and what you need depending on your case.

Unknown Gravity: custody integration for your platform

Unknown Gravity is not a custodian: it is the blockchain development company that designs and integrates the custody layer of your product. If your platform issues, manages or trades crypto-assets, someone has to decide where the keys live — and that decision defines your architecture and your regulatory obligations.

Why work with Unknown Gravity?

  • Tailor-made wallet architecture: MPC, multi-signature, cold wallets and hot wallets depending on the flow of funds.
  • Integration of regulated custodians and technology providers into your platform.
  • Custody model design together with your advisors: who controls the keys determines whether you need CASP authorisation under MiCA.
  • Audited smart contracts and backend, with documented residual risk.

We also publish a complete guide on crypto-asset custody with the regulatory and technical detail.

MPCMULTISIGWALLETSINTEGRATION

BitGo: institutional custodian with a European licence

BitGo is one of the longest-standing institutional custodians in the sector, with qualified custody, insurance over the assets and a European entity authorised under MiCA. It is the usual reference for funds, asset managers and companies that need cold storage at scale.

Coinbase Prime: custody and execution for institutions

Through Coinbase Prime, Coinbase offers institutional custody with segregated assets alongside execution and financing services. Its scale and the scrutiny of being a listed company make it the conservative choice for corporate treasuries and institutions taking their first steps with crypto-assets.

Fireblocks: MPC technology to run your own custody

Fireblocks does not hold assets for you: it sells the infrastructure (MPC, signing policies, exchange connectivity) so that companies and fintechs can operate their own wallets. This is the key distinction in this market: a technology provider is not the same as a custodian — with your own technology, the keys remain under your control and under your responsibility.

Bit2Me: custody from Spain

Bit2Me, the leading Spanish exchange, also offers custody services for individuals, companies and institutions that prefer a national provider, with support in Spanish and segregated accounts.

Conclusion: the right question is who controls the keys

Before comparing prices, answer three questions: who controls the keys (an authorised custodian, your company with MPC technology, or the user themselves), what happens if the provider goes bankrupt (asset segregation and separation rights) and what your regulatory case requires — under MiCA, holding crypto-assets on behalf of clients requires CASP authorisation. The answer to those questions defines the provider. This comparison is published by Unknown Gravity, which designs and integrates these architectures: check each option before deciding.

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01

Demonstrated experience

Outstanding experience collaborating with leading companies from different countries.

02

Personalized approach

Each client has unique needs, and we create solutions that are 100% adapted to your vision.

03

Security audits

Our process includes code audits and documented residual risk.

04

Efficiency and scalability

We design platforms that grow with you, optimizing each line of code.