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Sina Yamani
Sina Yamani is a London-based founder and technology entrepreneur whose work has included fintech, payments, Web3, blockchain, and artificial intelligence (AI). He founded and led the hospitality payments company Yoello and later founded ActionModel, a company focused on community ownership of AI. [1][2]
Early Life and Education
Yamani studied computer science at Cardiff University from 2014 to 2017. His professional interests include AI, fintech, Web3, blockchain, payments, and application programming interfaces (APIs). He speaks English and Persian at native or bilingual proficiency.[1]
Yoello
Yoello, founded in 2019 and headquartered in Cardiff, Wales, developed mobile ordering and payment products for hospitality businesses. Yamani’s profile lists him as the company’s founder from August 2019 and says he led it until March 2024.[1]
The company’s offerings included table ordering, pickup, click-and-collect, and delivery, alongside pay-by-bank and bill-payment services. Its products also included customer analytics, marketing tools, dynamic menus, and digital receipts. Yamani’s profile describes Yoello as having pioneered the use of open banking for consumer payments.[1]
Yamani’s profile reports that Yoello served 2 million paying users in the United Kingdom, processed more than 100 million in payments, powered thousands of merchants internationally, raised $10 million, and had a team of more than 100 people. In May 2021, he announced the launch of Yoello’s order-and-pay platform in Canada, following its launch in the United States.[1]
Yoello was acquired by Epos Now. In a post dated December 18, 2024, Yamani announced the acquisition and described it as the end of his journey with Yoello.[1]
Fintech Roles
From August 2020 to January 2024, Yamani served on the board of FinTech Wales, an independent membership association and advocate for Wales’s fintech and financial-services industries. From October 2022 to February 2024, he was a UK fintech ambassador for the UK Department for Business, Innovation and Trade in London. [1]
Action Model
In 2024, Yamani founded ActionModel’s and serves as the CEO of of the company. ActionModel’s stated mission is to make AI’s benefits broadly shared rather than concentrated among a small number of technology companies and billionaires. The company argues that AI could put a billion jobs at risk and that major technology companies capture value from users’ data.[1][2]
Action Model is headquartered in the Cayman Islands, with 30–40 employees distributed across 11 countries, including Turkey, the United Kingdom, Nigeria, the Cayman Islands, and the Netherlands.
In a post dated February 5, 2026, he announced that the company had launched after months in stealth and said it received 75,000 sign-ups within 72 hours. A March 10, 2026 post said the company had passed 250,000 users in less than a month, was operating on an invite-only basis, and promoted community-owned AI as an alternative to control by billionaires.[1]
Action Model’s website lists advisors including Andrew Saunders, CMO of Arbitrum; Anthony Day, managing director at VeChain and Polkadot; David Sedecca, finance director at Polkadot; Jan Camenisch, CTO of ICP; Mario Casiraghi, CFO at ASI and Singularity DAO; Raheem Ali, COO at CoinBureau and OKX; Daniel Baker of NEAR and Impossible Cloud; Eric Benz, CEO of Changelly; and Zoltan Fazekas, head of research at Zilliqa.
It also lists Daniel Gretzke alongside Polygon and Uniswap. Named team members include Head of Operations Declan Aaron Edwards, Technical Lead Poorya Araghy, and Marketing Manager Georgia Lilli Coombs, as well as staff in design, software engineering, AI, quality assurance, marketing, business development, partnerships, community, operations, and product roles.[2]
In February 2026, Yamani was reported as a speaker at the Institutional Onchain: Stablecoins, RWAs & AI event at Consensus Hong Kong. The event was hosted by The Unpaid Company, and other participants included representatives from KiteAI and 1inch.[1]
Actionist
Yamani also lists himself as the founder of Actionist from January 2024, while his profile lists the company as founded in 2026.
Actionist is described as an application that turns computers into an autonomous workforce: users can control a computer’s mouse, keyboard, and screen to automate tasks without coding. The profile describes the company as headquartered in the United Kingdom, with a workforce distributed across the United Kingdom, Turkey, and the Cayman Islands.[1]
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