Kaꜩleen 🚂 (@breitwoman) — Twitter Score 192 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 192 out of 1000 (an Excellent rating) as of August 2026, ranking #2,502 (top 1%) among 483,944 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 6,944 posts on the platform and has been mentioned by 241 accounts a total of 660 times, reflecting ongoing attention from the crypto community.

Who follows Kaleen on X?

The accounts that follow Kaleen include 713 founders, 182 angel investors, 178 influencers and 22 VCs, among them Balaji, Brian Armstrong, Chris Dixon, jesse.base.eth, Toly and Laura Shin.