Who is Jae Kwon? Tendermint creator and Cosmos co-founder

Jae Kwon is a Korean-born, US-educated programmer who created Tendermint, the consensus algorithm that secures the networks of the Cosmos ecosystem, and co-founded Cosmos with Ethan Buchman. In 2014 he published the paper proposing to replace Bitcoin mining with Byzantine fault-tolerant consensus, in which a group of validators with funds deposited as collateral votes on each block. Today he leads NewTendermint and Gno.land, a smart contract network written in a variant of Go.

His career revolves around one idea: the security of a proof-of-stake network depends on a validator's signature carrying economic consequences, and governance must protect that security before any other goal. That conviction explains Tendermint, and also his clashes with the Cosmos community, from his departure in 2020 to the fork he proposed in 2023. Distinguishing Kwon from his company, the foundation and the network helps show who decided what.

Who is Jae Kwon?

Kwon is the founder of NewTendermint, the company he created in 2022, and of Gno.land, according to his personal website; the press release for Gno.land's mainnet launch in September 2026 describes him as the project's founder and CEO. In May 2022 CoinDesk reported that he held a majority stake in All in Bits, the parent company of the former Tendermint Inc. His Cosmos co-founder, Ethan Buchman, also co-founded that company and later led the Interchain Foundation, the Swiss foundation that supports Cosmos.

He should not be confused with Do Kwon, co-founder of Terraform Labs and the Terra network, whose 2022 collapse was covered by Fortune. They share a surname and an industry, but they are different people and their projects are unrelated: Jae Kwon's work centers on consensus and Cosmos infrastructure, not on Terra's algorithmic stablecoin.

Education and early career

Kwon was born in Korea, into a family that put school performance first, and he describes himself as a problem child in an interview with Decrypt from April 2019. After coming to the United States, he says, he discovered ideas of freedom, individualism and personal sovereignty. He earned a degree in Computer Science from Cornell University in 2005 and worked as lead mobile developer at Yelp, where he built its first iPhone app, according to his website. In the same period he traded stocks and options.

His interest in cryptography has two origins he connects himself: the 2008 housing crisis, which hit his family's business, and Edward Snowden's revelations. In 2013, according to Decrypt, he was about to give up on finding an alternative to proof of work and had started building a cryptocurrency exchange when he came across a set of academic papers from 1988 on Byzantine fault-tolerant consensus. Those papers contained the pieces he needed.

Tendermint: consensus without mining

In 2014 he published "Tendermint: Consensus without Mining", still signed with his Cornell email address. The paper starts from the nothing-at-stake problem: in early proof-of-stake proposals, signing on two branches at once cost nothing. Tendermint solves it with deposits. Validators lock coins as collateral, vote on each block in rounds, and a block is committed once validators holding at least two thirds of the voting power sign it. If a validator signs two conflicting blocks, anyone can publish the evidence and its deposit is destroyed.

The practical effect is immediate finality: once committed, a block is not reverted unless more than a third of validators acted maliciously, in which case they lose their deposits. In 2018 Kwon formalized the protocol with Buchman and Zarko Milosevic in "The latest gossip on BFT consensus", the specification with safety and liveness proofs. By then the company he co-founded in 2014, Tendermint Inc., was developing both the consensus engine and the Cosmos software.

Cosmos: from white paper to network

The Cosmos white paper, signed by Kwon and Buchman, proposes a network of independent chains, called zones, connected through a center, the Hub, by an inter-blockchain communication protocol (IBC). Each chain keeps its own validator set and rules, and IBC lets assets and messages move between them without a single chain processing everything. It is the model we describe in our Cosmos profile.

The Interchain Foundation, based in Switzerland, funded development with a token sale in April 2017 that hit its target of about $17 million in the first 29 minutes, according to Decrypt; Kwon admitted it was a surprise and that a token sale was not their first choice, because venture capital had not invested. The Cosmos Hub mainnet started on March 13, 2019, according to CoinDesk. Kwon was then president of the foundation and CEO of Tendermint.

Company, foundation and network: who decides what

The later conflicts are easier to follow once three layers are separated. Tendermint Inc., now All in Bits, is a private company that developed the software and in which Kwon held a majority in 2022, according to CoinDesk. The Interchain Foundation is the foundation that held the proceeds of the 2017 sale and funds development. The Cosmos Hub is a network whose rules change through votes by ATOM holders in proportion to their stake. Kwon has carried weight in all three, but he does not control the Hub's votes, as the approval of proposal 848 against his vote showed.

Departure, return and conflicts in Cosmos

In January 2020 Kwon announced he was leaving the day-to-day running of Cosmos to work on Virgo, a decentralized technology project partly funded by the Interchain Foundation, according to Decrypt. Days later Zaki Manian, a director at Tendermint, accused him on Twitter of walking away from his responsibility to the project, and Jessy Irwin, director of security, alleged retaliation and harassment of engineers and wrote that the problem came from the top, according to Decrypt. Kwon disputed at the time that he was stepping down, but that year he left the CEO role and Peng Zhong replaced him.

In 2022 the company was renamed Ignite and in May it split in two: Ignite, under Zhong, and NewTendermint, with Kwon as CEO. CoinDesk reported at the time that Manian, by then outside the company, had accused Kwon of religious discrimination and abusive treatment of staff in a later-deleted thread, and that Kwon maintained Manian, Buchman and other Cosmos leaders were conspiring against him. Kwon opposed Hub proposal 69 on security grounds, promised to include those who voted against it in the Gno.land airdrop, and the proposal was rejected. Zhong left Ignite on July 1, 2022, according to The Block.

The most visible clash came in November 2023, when the Hub passed proposal 848, which cut ATOM's maximum inflation from about 14% to 10%, with 41.1% of votes in favor and 31.9% against, according to Decrypt. Kwon, who had voted no with veto, proposed a fork called AtomOne with an airdrop for those who opposed it. His argument was that lower inflation reduces the incentive to stake and, with it, the Hub's security; the proposal cut the nominal staking reward from about 19% to about 13.4%, according to the same source. The AtomOne chain started on October 18, 2024, with community validators, according to All in Bits.

Jae Kwon today: Gno.land

Gno.land's mainnet has been running since September 12, 2026, under the chain ID gnoland-1, according to its repository. Its contracts, called realms, are written in Gno, an interpreted and deterministic variant of Go, and their source code is published on-chain so anyone can read it, according to the launch press release. The network uses a variant of Tendermint consensus and distributed part of its token, GNOT, to ATOM and AtomOne holders.

The GNOT sale disclosure, published as a draft, allocates at genesis 26.26% of supply to ATOM holders, 17.33% to AtomOne holders, 22.5% to investors and 24.91% to NewTendermint LLC, the company that incubated, funded and developed the project. For anyone building today in the ecosystem Kwon helped create, the state of the networks and providers is covered in our guide to choosing a Cosmos development company.

What is Jae Kwon's net worth?

There is no reliable estimate of Jae Kwon's net worth. As of November 10, 2026, neither Forbes nor the Bloomberg Billionaires Index publishes a figure for him, and Kwon has not disclosed his holdings. The amounts circulating online come from aggregator sites that do not explain their method, and some confuse him with Do Kwon, so this profile does not reproduce them.

What is public are the pieces that wealth would depend on. CoinDesk reported in 2022 that Kwon held a majority of All in Bits, a private company with no published valuation. NewTendermint LLC received 24.91% of the initial GNOT supply, but that share belongs to the company, not to Kwon, and its value depends on a token launched with the network in September 2026. There is no record of how much ATOM or ATONE he holds personally.

Jae Kwon's contribution: bringing BFT consensus to proof of stake

Kwon's contribution lies in joining two traditions that ran separately until 2014: academic research on Byzantine fault-tolerant consensus and open cryptocurrencies. Tendermint gave proof of stake a verifiable rule, the deposit destroyed on a double signature, and immediate finality that later made it possible to connect independent chains through IBC. The 2014 paper and the 2018 formal specification show the idea was written down and reasoned out before the ecosystem existed.

The tension lies in governance. Kwon defends the Hub's security as a principle a vote should not weaken, and he has carried that position as far as proposing new networks when he lost, rather than accepting the result. It is a legitimate use of the freedom to exit that open source offers, but it has fragmented the community his own protocol was meant to coordinate, and the accusations from former colleagues, which he denies, remain part of any assessment of his leadership.