What is Stellar?
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🟢 The simple version
Plain English — no jargon. Start here.
Stellar is a blockchain built to move money — especially small, cross-border payments — quickly and almost for free.
Built for everyday payments
While many blockchains chase complex apps, Stellar keeps a tight focus: helping people and businesses send money across borders cheaply and fast. Sending money between countries today is often slow and pricey; Stellar aims to make it nearly instant and nearly free, including for small amounts that other systems make uneconomical.
Who it's for
Stellar leans toward real-world financial inclusion — connecting banks, payment companies, and people in regions underserved by traditional finance. It's often mentioned alongside XRP because both focus on payments, though they're separate projects. Its coin is called XLM (Lumens).
What to keep in mind
Stellar's narrow payments focus is a strength (clear purpose) but means it doesn't have the sprawling app ecosystems of Ethereum or Solana. Its success depends on real-world adoption by financial institutions. XLM's price is volatile like all crypto.
🟡 A bit more detail
For when you want to go a little deeper.
Anchors: the bridge to real-world currencies
Stellar uses a concept called Anchors — trusted entities that hold real-world currency (USD, EUR, KES, PHP) and issue equivalent tokens on the Stellar network. When you want to send $100 internationally, you deposit $100 with an Anchor, receive $100 in Stellar tokens, send those tokens instantly across the network, and the recipient redeems them with their local Anchor for local currency. Anchors take custody of the real-world funds while the Stellar network handles the settlement.
This model means Stellar itself does not hold any real-world currency — it only moves representations of value agreed upon by trusted parties. Security depends on choosing reputable, regulated Anchors.
MoneyGram partnered with Stellar (and later terminated the partnership, then resumed discussions) for USDC-based money transfers at MoneyGram locations. The Ukrainian government used Stellar to distribute over $2 million in humanitarian aid to refugees via digital wallets in 2022. IBM World Wire used Stellar for cross-border payments before IBM wound down the service. Multiple African fintech companies use Stellar for mobile money payments. The International Air Transport Association (IATA) explored Stellar for airline settlement. USDC on Stellar is widely used for stablecoin remittances in Latin America and Southeast Asia.
Stellar vs Ripple: the key differences
Both use a federated consensus model and focus on payments, but differ significantly. Stellar is open-source and governed by a non-profit; Ripple is a for-profit company. XLM distribution was largely through giveaways and partnerships targeting financial inclusion; XRP was retained largely by Ripple Labs. Stellar has native DEX functionality built into the protocol; Ripple's exchange features are secondary. Stellar explicitly targets individuals and NGOs; Ripple targets large financial institutions.
Key Stellar metrics: Anchor volume (how much real currency is flowing through), USDC on Stellar supply, active accounts, and partnership depth with remittance corridors. Stellar's competitive position is low-cost, fast, payment-focused infrastructure with a non-profit governance model — more trusted by aid organisations and development banks than commercial alternatives. Live data: CoinGecko · Stellar Expert explorer.
🟣 The full technical picture
For the technically curious.
Stellar Consensus Protocol (SCP): Federated Byzantine Agreement
Stellar uses the Stellar Consensus Protocol — the first production implementation of Federated Byzantine Agreement (FBA), designed by David Mazières at Stanford. Unlike classical BFT consensus (which requires a known, fixed validator set) or Nakamoto consensus (which requires proof-of-work), FBA allows each node to choose its own "quorum slice" — a set of nodes it trusts. Safety is guaranteed when there is sufficient overlap between quorum slices across the network.
SCP provides two properties: Safety (all correct nodes agree on the same value) and Liveness (the protocol continues making progress). These hold as long as the quorum intersection property is maintained — the network of quorum slices must form a connected graph with sufficient redundancy. If quorum slices diverge (nodes trust entirely different sets), the network can fork.
Source: Mazières, D. (2015). The Stellar Consensus Protocol: A Federated Model for Internet-level Consensus. Stellar Development Foundation. stellar.org/papers/stellar-consensus-protocol
Path payments and the DEX
Stellar's built-in DEX operates using offers stored in the ledger as orderbook entries. Path payment operations automatically traverse multiple asset pairs to find the best route. The pathfinding is done client-side using the Stellar Horizon API, which returns optimal paths given current orderbook state. In practice, XLM often serves as an intermediate bridge asset, though any pair of assets with sufficient liquidity can route directly. Settlement is atomic — the multi-hop conversion either completes fully or reverts entirely.
XLM's minimum account balance requirement (currently 1 XLM base reserve + 0.5 XLM per account entry) prevents Sybil attacks on the network — creating millions of fake accounts to spam the ledger requires holding XLM for each. This reserve mechanism differs from Ethereum's gas model: Stellar charges a flat fee per operation (0.00001 XLM) plus reserves that are locked per account object. Reserves are returned if the account entry is removed. This design keeps ledger state manageable while remaining accessible — 1 XLM reserve is negligible in cost.
Key protocol parameters
- Consensus: SCP (Federated Byzantine Agreement)
- Ledger close time: 3–5 seconds
- Transaction fee: 0.00001 XLM (100 stroops)
- Total supply: 50 billion XLM (fixed; originally 100B, 55B burned 2019)
- Account reserve: 1 XLM base + 0.5 XLM/entry
- Built-in DEX: Yes (native orderbook)
- USDC: Native issuance by Circle
- Smart contracts: Soroban (Rust/WASM, launched 2024)
Source: Stellar documentation. developers.stellar.org