Who is Jed McCaleb? Ripple and Stellar co-founder

Jed McCaleb is an American programmer who took part in three early chapters of cryptocurrency. He created the site that would become Mt. Gox, the first major bitcoin exchange; he co-designed the XRP Ledger and co-founded the company now called Ripple; and in 2014 he founded Stellar, a payment network backed by a non-profit foundation. Before that he had created eDonkey2000, one of the most widely used file-sharing applications of the early 2000s.

His career has an unusual feature: he left each project at an early stage to start the next one. That makes it important to separate his contribution from what other people did later, especially at Mt. Gox, which collapsed in 2014, three years after he sold it. Today he devotes much of his time to Vast, an aerospace company he founded in 2021.

Who is Jed McCaleb?

McCaleb is a co-founder of the Stellar Development Foundation (SDF), the non-profit that supports development of the Stellar network, and is listed among its leadership and on its board, according to the team page. He is also the founder and executive chairman of Vast, whose CEO is Max Haot, according to the company's website.

Stellar and Ripple share a common origin but are separate projects. The XRP Ledger and its asset, XRP, are historically tied to Ripple, a for-profit company. Stellar and its asset, the lumen (XLM), are backed by a foundation. That difference in governance was one of the decisions McCaleb made when he founded the second project.

Education and eDonkey2000

McCaleb was born in 1975 in Fayetteville, Arkansas. He attended the University of California, Berkeley, left without completing his degree and moved to New York, according to a 2013 Wired profile. In 2000 he founded MetaMachine and released eDonkey2000, a peer-to-peer file-sharing application that did not rely on a central server to host files.

The application ended up in conflict with the US recording industry. In 2006 MetaMachine reached a settlement with the RIAA, agreeing to stop distributing the software and pay $30 million. The experience with peer-to-peer networks, where participants who do not know each other must coordinate without a central authority, reappears in his later projects.

Mt. Gox: the origin of the exchange

In 2007 McCaleb bought the domain mtgox.com to build a marketplace for Magic: The Gathering cards, hence the name (Magic: The Gathering Online eXchange). In late 2010 he turned it into a platform for buying and selling bitcoin, one of the first of its kind, and in February 2011 he sold it to Mark Karpelès while keeping a minority stake.

Mt. Gox came to handle most bitcoin trading and went bankrupt in February 2014, after hundreds of thousands of customers' bitcoins disappeared, as Wired reconstructed. The collapse happened under Karpelès's management. Attributing it to McCaleb would be incorrect, but his time at Mt. Gox is part of the history of Bitcoin: it showed early on what it means to entrust funds to a platform that holds them in custody.

The XRP Ledger and the founding of Ripple

In 2011, McCaleb, David Schwartz and Arthur Britto began developing a payment ledger that would not depend on mining, whose energy consumption in Bitcoin they considered wasteful. The XRP Ledger went live in June 2012 with XRP as its native asset. In September that year Chris Larsen joined and they founded NewCoin, quickly renamed OpenCoin and, in 2013, Ripple Labs. McCaleb was co-founder and CTO, according to the ledger's official history.

Instead of mining, the XRP Ledger validates transactions through consensus among servers: each one keeps a list of validators it trusts and accepts a version of the ledger when a supermajority of them agree. The XRP Ledger technology page explains the mechanism in more detail. The founders gave 80 billion XRP to the company and kept 20 billion; McCaleb's share was 9 billion, according to CoinDesk, making him one of the largest individual holders.

McCaleb left his active role at Ripple in 2013. His departure came with disagreements with the rest of the leadership, which each side has explained differently, and it raised a practical problem: what to do with the XRP held by a co-founder who no longer worked at the company.

His XRP and the agreements with Ripple

In May 2014 McCaleb announced that he would sell all his XRP within two weeks, and the price fell by about 40% that day. In August he signed an agreement with Ripple setting a sales schedule for his 9 billion XRP: $10,000 a week in the first year and rising limits in later years.

The relationship ended up in court and was settled in February 2016. According to CoinDesk, McCaleb sold his equity in Ripple, accepted sale controls on 5.3 billion XRP linked to average daily trading volume, and 2 billion XRP were set aside for a charitable fund. The sales continued until July 2022, when the wallet he sold from was emptied and deleted from the ledger, according to Cointelegraph.

The episode illustrates a design risk shared by many tokens: when a founder retains a large share of the supply, their sales schedule affects the market and requires agreements that go beyond the protocol.

Stellar: a payment network with a foundation

In 2014 McCaleb and Joyce Kim founded the Stellar Development Foundation, which introduced the network on 31 July with an initial $3 million loan from Stripe. The goal was an open network for sending value across currencies and financial institutions, with a native asset, the lumen, and a non-profit organization behind it.

In 2015 the network adopted its own consensus mechanism, the Stellar Consensus Protocol, designed by David Mazières, a Stanford professor and the foundation's chief scientist, as reported by MIT Technology Review. Each node chooses which other nodes it trusts, its quorum slices, and the network reaches agreement when those sets overlap sufficiently. Stellar's earlier model, derived from Ripple's, depended on validator lists overlapping heavily; SCP defines the conditions under which nodes with different lists can reach safe agreement.

The other defining element is anchors, entities that receive money outside the network and issue its representation on it, so a payment on Stellar can start and end in traditional currencies. The Stellar technology page and the guide to Stellar development companies cover its current use.

Vast and his current activity

In 2021 McCaleb founded Vast, a company developing commercial space stations, which he funded himself in its early stages. Its first module, Haven-1, was due to launch in 2025; the company postponed the date several times and in July 2026 was targeting the first quarter of 2027, according to NASASpaceFlight. McCaleb serves as executive chairman while Max Haot runs the company as CEO.

His link to Stellar continues through the foundation, where he is still listed among the leadership and on the board. The sources consulted do not attribute a specific executive title at the SDF to him as of October 2026, so this profile does not specify one.

Jed McCaleb's contribution

McCaleb is a transitional figure between the peer-to-peer networks of the 2000s and the first cryptoasset payment infrastructure. The XRP Ledger and Stellar proposed an alternative to Bitcoin mining based on consensus among servers, and Stellar added a governance decision, the non-profit foundation, intended to keep the network independent of a company's financial results.

His story also shows limits. Selling Mt. Gox does not make him responsible for its later collapse, but it is a reminder of how much users depend on whoever holds their funds. And his XRP sales, governed by contract over eight years, show that the initial concentration of a token is a market and governance question as well as a technical one.