To collaborate, to manage their identities and to access their own data, users pay increasingly high rent to someone else. All the while keeping
+getting hacked, ransomed or spied upon...
What if there was a solution, right in our own hands ?
+
4NK builds a user‑owned cloud bringing sovereignty and simplicity together. Digital sovereignty has been third party promise for way too long. 4NK's self-custodial cloud makes it a technical reality
The 4NK Self-Custodial Cloud OS runs as app on your often-idle equipement.
+ We are restoring user agency on the internet by leveraging private keys
+ as the core building block to anchor ownership and trusted workflows. No blockchain, and no token : simply a
+ client-side infrastructure that extends Bitcoin’s properties for
+ everyday use and collaborative workflows.
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+Our approach is pragmatic, privacy‑first, and Bitcoin‑aligned.
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Identity
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Users own and manage their keys. The infrastructure is built around you. Control what you share, with whom and how.
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Infrastructure-less
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Leverage existing or underused gear (laptop, servers..)
+to run the Self-Custodial OS app. New CAPEX is optional. Invite others
+to use your infrastructure on your own terms, they don't need a node but
+ only a browser.
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Security
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Your data, your rules. Encrypted by default, shared on
+your terms. Fully encrypted storage. Local or distributed. All
+communications are encryped and do no leak meta-data by leveraging
+Bitcoin's silent-payment functionality.
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Network
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Collaborate and Network as you wish. Network layer is
+made up of nodes which can be local or distributed. Many networks can be
+ built from nodes in the open or as dedicated islands.
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Your Keys, Your workflows
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The Self-Custodial Cloud value proposition is for you to build any cloud collaborative workflow you want.
+ Here are some examples of the services you can deploy.
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Personal Digital Safe
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Secure storage for yours documents. Secure sharing.
+Choose whether it is store locally or on the cloud. It's always fully
+encrypted by your private key.
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Personal Sovereignty
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Run an LLM only on content you own and want to keep private. 100% local . Without any data leak
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Collaborative documents
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Build secure document workflows. With encrypted data
+storage and sharing. Super simple identities management : create, share,
+ invite any users (they do not need to run a node, just a browser).
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Workflows orchestration
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Your Rules: fully manage rules, roles, access policies,
+and data access for any workflow. Always with verifiable identities.
+Audit trail with timestamped proofs at each and every interaction..
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Updates
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Recent highlights and projects from the 4NK network.
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Sep 2025: Alpha release for a B2C Self-custodial cloud freemium service.
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Aug 2025: Alpha release for a self hosted local LLM running only on the user's content.
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Jul 2025: Pre-production stage for the secure document workflow for notarial services.
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March 2025: First POC for a fully secure document workflow for notarial services.
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2024 - 2025: Bitcoin meetups "Tour de France" showcasing the properties of Silent Payments
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Team
+
Our team and advisory board consists of
+experienced professionnal and talented Bitcoiners, including core
+developer. Our mission is to expand Bitcoin's properties, such as
+self-custody, privacy and empowerement, to the everyday digital life.
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