What is Stellar?

Stellar is an open-source payment network and smart contract platform designed for fast, low-cost cross-border asset transfers, with a particular focus on serving unbanked populations and emerging markets. Founded in 2014 by Jed McCaleb (co-founder of Ripple) and Joyce Kim, it uses the Stellar Consensus Protocol (SCP) — a federated Byzantine agreement mechanism that achieves finality in 3-5 seconds without proof-of-work or standard proof-of-stake. XLM (Lumen) serves as the network's base currency and anti-spam mechanism rather than as a speculative investment asset by design.

Stellar's consensus model, SCP, relies on quorum slices: each node selects a set of other nodes it trusts, and the network achieves consensus when sufficient overlapping trust sets agree. This is distinct from both PoW (no mining), standard BPoS (no validator staking), and classical BFT (no fixed committee). It allows high throughput (~5,000 transactions per second theoretical) and 3-5 second finality with minimal energy consumption, making it practical for micropayments and remittances. The Stellar network natively supports multi-currency atomic swaps and maintains an on-chain decentralized exchange (SDEX), which means any two Stellar assets can be traded against each other without a separate DEX protocol. Soroban, Stellar's smart contract platform activated in 2024, adds Wasm-based smart contracts to the network.

The recurring criticism of Stellar is its token distribution and the role of the Stellar Development Foundation (SDF). The SDF controls a large XLM treasury used to fund ecosystem development, and periodic large transfers from the SDF have historically created sell pressure. The network has also faced comparisons with Ripple/XRP — both target cross-border payments, both were co-founded by Jed McCaleb, and both have centralization concerns stemming from the relatively small number of trusted validator nodes. McCaleb himself departed Ripple in dispute and has sold billions of XLM through court-supervised schedules, which the XLM community tracked as a persistent overhang.

Reviewed by the 2Bitcoins Editorial Team · Updated June 2026. Not financial advice.