Kaꜩleen 🚂 (@breitwoman) — Twitter Score 194 out of 1000

Kaleen is a blockchain entrepreneur who co-founded Tezos, a proof-of-stake blockchain designed with on-chain governance and self-amending capabilities. Kaleen's Twitter Score is 194 out of 1000 (an Excellent rating) as of July 2026, ranking #2,810 (top 1%) among 389,587 tracked accounts.

Kaleen co-founded Tezos alongside Arthur Breitman, building it as a direct response to governance conflicts in Bitcoin and other blockchains. The Tezos fundraiser raised $232 million in Bitcoin and Ethereum in July 2017, described by Wired as the largest ICO to date at that time. Following the fundraiser, disputes involving the Breitmans, Dynamic Ledger Solutions, and the Tezos Foundation delayed the project and led to class-action lawsuits alleging fraud and unauthorized securities sales. In 2020, those lawsuits were settled, with the Tezos Foundation paying $25 million before federal courts ruled on whether the ICO constituted an unregistered securities sale; the allegations were never adjudicated as established findings of guilt.

Kaleen previously worked at R3 as a senior strategy associate, and was formerly affiliated with the Tezos Foundation. Kaleen has published 6,928 posts on the platform and has been mentioned by 240 accounts a total of 659 times, reflecting ongoing attention from the crypto community.

Who follows Kaleen on X?

The accounts that follow Kaleen include 644 founders, 155 angel investors, 214 influencers and 24 VCs, among them Balaji, Brian Armstrong, Chris Dixon, Laura Shin, jesse.base.eth and Toly.