Bitcoin, not the wider crypto market
The platform stays focused on Bitcoin, its protocol, its network and the practical responsibility of using it.
Independent Bitcoin education
Understand Bitcoin. Verify more for yourself.
21Relay connects structured education, practical node guidance, self-custody planning, network data and Bitcoin-focused tools in one open platform.
Why 21Relay exists
Move beyond price and understand the system
Many people first meet Bitcoin through an exchange, a headline or a price chart. 21Relay starts earlier: what money is, how keys and transactions work, why full nodes matter and how the network reaches agreement without a central operator.
The aim is not to tell readers what to buy. It is to make Bitcoin’s rules, risks and trade-offs understandable enough that people can evaluate claims and make their own decisions.
Verification over promotion
Lessons explain how claims can be checked through primary sources, full nodes and transparent calculations.
Plain language with technical depth
Beginner explanations lead into transactions, policy, consensus, Script, mining and network operation without hiding important trade-offs.
Open before accounts
The public V1 experience is designed to work without signing in, connecting a wallet or sharing financial information.
What is included
Six ways to learn, inspect and practise
Each area has a clear job. Lessons establish the concepts, simulations make them visible, node guides turn theory into practice, and data and tools help readers inspect real conditions.
Bitcoin Academy
Beginner, Intermediate and Advanced pathways with diagrams, lesson summaries, quizzes, assessments, progress tracking, badges and an optional completion certificate.
Bitcoin Playground
Guided local simulations for transactions, UTXOs, mining, blocks, keys, multisig, network behaviour and other core Bitcoin systems.
Library and primary sources
Curated Bitcoin books and videos, reading status, guided selections and a dedicated companion page for Satoshi Nakamoto’s white paper.
Run a Node
A connected journey through hardware selection, Bitcoin Core and Umbrel installation, initial sync, maintenance, privacy and troubleshooting.
Network Data
Bitcoin market, chain, mempool, mining, supply and reachable-node indicators presented with status labels, context and documented limitations.
Tools and self-custody
Calculators and planning tools for sats, fees, UTXOs, transaction size, node resources, storage setups, signing devices and recovery planning.
Data boundaries
Context before confidence
External data can be delayed, revised or unavailable. 21Relay distinguishes operational states rather than presenting every value as equally current or authoritative.
LiveCachedDelayedEstimatedUnavailable
Read the analytics methodologyPrivacy approach
Local first, no wallet required
V1 learning progress and non-sensitive preferences remain in the browser. Public tools do not ask for seed phrases or private keys, and the platform does not require a wallet connection.
Public address or transaction lookup tools only process the public identifiers a user chooses to submit. Never enter secret recovery material into 21Relay or any website.
Public V1 scope
What readers can expect at launch
The first public release prioritises useful open access over account-dependent features.
- No account is required for public lessons, guides, analytics or tools.
- Academy progress, reading status and Playground completion are stored in the current browser.
- The Playground is educational only: it creates no real keys and broadcasts no transactions.
- The V1 interface launches in English; incomplete language options are not presented as available.
- Sign-in and a dedicated app are planned additions, not dependencies of the public V1 experience.
Education, not advice
21Relay provides general education and planning tools. It does not provide financial, investment, legal or tax advice, predict returns or guarantee outcomes.
Independent and unaffiliated
21Relay is not Bitcoin Core, an exchange, wallet provider, hardware manufacturer, financial institution or owner of the Bitcoin network. Product references are educational; commercial relationships must be disclosed where they appear.
Accessible by design
The interface is designed for keyboard navigation, visible focus, responsive layouts and reduced-motion preferences. Accessibility barriers can be reported through the correction channel.
Trust and accountability
Review the standards or report a problem
21Relay publishes its source hierarchy, editorial boundaries and corrections process. Reports can cover factual errors, stale data, broken functionality or accessibility barriers.
About content reviewed 17 August 2026