Aviv Refuah

Serial Entrepreneur | Venture Capitalist | Founder & CEO

🔄 Updated September 2026💼 26 investments📅 8 years investing🗓 Last invested Nov 2023
Operator-angel20+ investments
26
Total investments
10
Early stage
10
Mid stage
2
Late stage
8y
Years active

Portfolio

23 investments · sorted by recency
All investments
Early stage
Mid stage
Late stage
Seed Investor
Nov 2023
Lumai is enabling AI deployment at scale with the fastest, most energy-efficient AI processor for datacentres. The company is solving the challenge of how to meet the ever-increasing AI performance demand while minimising energy consumption. Lumai’s unique 3D optical technology is taking AI processing way beyond the limitations of both silicon-based GPUs and photonic solutions. With its outstanding power efficiency, Lumai significantly reduces the operating costs of running AI processors. The company is an Oxford University spinout, and the technology is based on many years of ground-breaking research. The Lumai team brings together outstanding technical knowledge alongside commercial and scaleup expertise.
Investor
Apr 2022
Deskfirst provides innovative online collaboration desktops to streamline interactions with clients and teams.
Investor
Jul 2021
CASTOR is an automated 3D printing software enabling manufacturers to identify cost reduction opportunities, utilizing the benefits of industrial 3D printing. The software analyzes thousands of parts at once and provides deep technical analysis for a full machine design while identifying cost reduction opportunities and suggesting geometry changes to the part's design. It estimates the cost and lead-time for each part and connects the manufacturer to a service bureau that can print and supply the part according to requirements. CASTOR's easy-to-customize software helps manufacturers find profitability within 3D printing, fitting their needs like a glove. Visit our website to learn more: www.3dcastor.com
Investor
Apr 2021
Visionary AI empowers cameras to achieve the next generation of image quality. Our software-based ISP (Image Signal Processor) leverages AI to achieve market-leading performance on a wide range of imaging tasks such as low-light imaging, de-noising, exposure control, and high dynamic range. Our technology both dramatically improves image quality, and increases the accuracy and capabilities of detection and recognition algorithms. Other product features include gaze correction, bokeh, and depth maps on any sensor. As a software-based ISP, we’re able to deploy updates in real time, ensuring that cameras can stay at the forefront of computer vision developments, and maintain the highest quality imaging capabilities in the market. Visionary AI was founded by a team with years of experience pioneering real-time algorithms in computer vision. We are a team of imaging, computer vision, ISP, and optic specialists from the world’s leading technology companies including Apple, Samsung, Corephotonics, Intel and Mobileye.
Investor
Feb 2021
By automating all of your finances, accounting and tax, we make admin for business owners... Simpler: Connect your bank account Ember will automatically categorise all your transactions with the HMRC Smarter: Know your real-time tax position to avoid month-end surprises Cheaper: Save the money youd normally spend on an accountant More intuitive: See all your important numbers in one central feed and directly submit your VAT returns, payroll and end of year accounts, accountant-free Sign up for 1 month free.
Investor
Oct 2019
THERES ALWAYS A BETTER HOTEL DEAL FOR YOU OUT THERE. There are hundreds of brokers, thousands of agents, millions of hotels, and an infinite number of pricing combinations in the travel industry. Until now, no travel company had the ability to use all this information together to provide better rates for travelers... Lucky for you, we are a tech company.
mid stageHospitality
Investor
Aug 2019
Disrupting the traditional $80 billion ski travel industry with the worlds first self-service platform for booking an entire ski trip in just a few clicks. Using our unique dynamic package technology, WeSki empowers customers to plan, compare, book and fully customize their ski holiday by providing real-time prices and availability for millions of ski trip combinations. WeSkis technology connects to thousands of suppliers to provide customers with a one-stop-shop solution to book everything they need for their ski holiday, including flights, airport transfers, accommodations, ski lift passes, ski gear rental, and more. Once skiers are on their trip, WeSkis technology continues to provide a stress-free experience by coordinating all trip components, so skiers can relax and enjoy their ski holiday without worrying about the logistics. WeSki partners with over a hundred ski resorts (and counting) across 10 different countries and already sold over 40,000 ski holiday packages to skiers worldwide.
Investor
Jun 2019
Roomerang gives all travel professionals in the world a chance to sell hotel rooms in a totally different way, we provide them a flashlight in the dark of rooms and rates. for the first time ever, in one single search they can see what is the most profitable hotel room they can book. we are very excited and welcome all on board (it's free to sign up), together we can all win from a very high end technology and a different way of thinking.
early stageHospitality
Investor
Jun 2019
Wenrix uses cutting-edge AI technology to help travel agencies collect the money off the table, by generating new savings and boosting conversion rate on bookings. We know to purchase flight tickets for the online travel agencies and travel management companies exactly at the right moment, for the minimal price. With our AI-powered SaaS platform travel agencies can get the best future airfares based on predictions. We are able to that by leveraging AI networks which until now belonged only to other complex domains.
Investor
May 2019
Wndr is bringing a new era of entrepreneurship to the travel industry by democratizing the power of international travel brands among individual travel experts, allowing them to launch their own personalized booking platform to monetize their trust and expertise.
Investor
May 2019
Wndr is bringing a new era of entrepreneurship to the travel industry by democratizing the power of international travel brands among individual travel experts, allowing them to launch their own personalized booking platform to monetize their trust and expertise.
Investor, Board Member
Mar 2019
Perimeter 81 is a robust, yet easy-to-use, converged networking and network security platform which connects all users, in the office or remote, to all resources, located on-prem, or cloud. It is a cloud-native service that includes advanced capabilities such as Zero Trust remote access, Internet access control, malware protection and firewall as a service. It enables any business to build a secure corporate network over a private global backbone, without hardware and within minutes. The entire service is managed from a unified console and is backed by an award-winning global support team that has you covered 24/7.
Investor
Feb 2019
Managing a hospitality business is complex. Guesty is your partner in making it easier. With an all-in-one platform, Guesty’s purpose-built technology optimizes and automates every aspect of your hospitality operations so you can save time, maximize revenue, and stay ahead of the curve. Our industry-wide expertise, large-scale R&D department of 200+ engineers, and technology-first approach ensures that hospitality businesses can streamline operations and achieve growth, all while delivering the best value to their guests. With a complete suite of features and more than 150+ industry partners, Guesty is transforming the hospitality industry with innovative solutions that help you succeed.
Investor
Jan 2019
Ontopo - Elevating Restaurants to New Heights 🍽️ Welcome to Ontopo, where the art of dining meets cutting-edge innovation. Our purpose is clear: to equip restaurants with advanced technology solutions that transcend the ordinary, opening doors to a new era in culinary experiences. 🌟 Shaping the future of dining From dynamic table management systems to impactful marketing campaigns and state-of-the-art tools, our comprehensive suite of products is meticulously crafted to one end: to maximize efficiency and amplify profits. Ontopo empowers restaurants to enhance customer experiences, optimize table utilization, increae online presence, and achieve unparalleled operational excellence. 🏆 A Proven Record of Success With a remarkable 70% of Israels restaurants as clients, our footprint is a testament to our impact. Collaborating with over 1000 restaurants, weve driven an impressive 3.2 million average monthly diners to our partners. Were not just a solution; were the gold standard in diner engagement. 💼 Our Team: Architects of Innovation Behind each line of code and every milestone reached stands our passionate team of professionals. From brilliant tech minds to seasoned industry experts, our diverse team embodies a collective genius that propels our mission forward. Ontopo is more than a workplace; its a family united by a shared vision. 🌍 Expanding Horizons: Culinary Revolution on a Global Scale With our sights set on broader horizons, our expansion into Europe marks an exciting chapter. This isnt just growth; its a testament to our impact.Ontopo is redefining dining worldwide, reshaping restaurant operations, success, and innovation. 👉 https://ontopo.co.il/en/ Ready to be part of a transformative journey? Follow us for updates on our latest innovations, success stories, and the brilliant minds driving our culinary revolution.
Founding Member, Board Member, Seed Investor
Jan 2019
UpStay was acquired by Plusgrade
Show all 23 investments ↓
Experience · 31 entries
All (31)
Investments (26)
Founder (4)
Board (2)
2024
Founding Partner
Apr 2024
Liberty Pixel is a casual gaming company that was founded by two industry veterans with a passion for creating fun and engaging games for players of all ages. Their flagship game, SkeeBoost, is a unique take on the classic arcade game of skeeball, with the addition of boosters and a PvP (Player versus Player) mode. SkeeBoost is a fast-paced and exciting game that combines the traditional gameplay of skeeball with new and innovative features. Players can compete against each other in real-time matches, using boosters to gain an edge and climb the leaderboard. The game features colorful and vibrant graphics, intuitive controls, and a wide variety of challenges and power-ups to keep players engaged for hours on end. Liberty Pixel is dedicated to creating fun and entertaining games that players will love. With SkeeBoost, theyre bringing a classic arcade game into the modern era and adding a new level of competition and excitement. The game will be available for both iPhone and Android and its set to be released soon. With their focus on quality and innovation, Liberty Pixel is poised to become a leading developer in the casual gaming space.
2023
Seed Investor
Nov 2023
Lumai is enabling AI deployment at scale with the fastest, most energy-efficient AI processor for datacentres. The company is solving the challenge of how to meet the ever-increasing AI performance demand while minimising energy consumption. Lumai’s unique 3D optical technology is taking AI processing way beyond the limitations of both silicon-based GPUs and photonic solutions. With its outstanding power efficiency, Lumai significantly reduces the operating costs of running AI processors. The company is an Oxford University spinout, and the technology is based on many years of ground-breaking research. The Lumai team brings together outstanding technical knowledge alongside commercial and scaleup expertise.
2022
Investor
Apr 2022
Deskfirst provides innovative online collaboration desktops to streamline interactions with clients and teams.
2021
Investor
Jul 2021
CASTOR is an automated 3D printing software enabling manufacturers to identify cost reduction opportunities, utilizing the benefits of industrial 3D printing. The software analyzes thousands of parts at once and provides deep technical analysis for a full machine design while identifying cost reduction opportunities and suggesting geometry changes to the part's design. It estimates the cost and lead-time for each part and connects the manufacturer to a service bureau that can print and supply the part according to requirements. CASTOR's easy-to-customize software helps manufacturers find profitability within 3D printing, fitting their needs like a glove. Visit our website to learn more: www.3dcastor.com
Investor
Apr 2021
Visionary AI empowers cameras to achieve the next generation of image quality. Our software-based ISP (Image Signal Processor) leverages AI to achieve market-leading performance on a wide range of imaging tasks such as low-light imaging, de-noising, exposure control, and high dynamic range. Our technology both dramatically improves image quality, and increases the accuracy and capabilities of detection and recognition algorithms. Other product features include gaze correction, bokeh, and depth maps on any sensor. As a software-based ISP, we’re able to deploy updates in real time, ensuring that cameras can stay at the forefront of computer vision developments, and maintain the highest quality imaging capabilities in the market. Visionary AI was founded by a team with years of experience pioneering real-time algorithms in computer vision. We are a team of imaging, computer vision, ISP, and optic specialists from the world’s leading technology companies including Apple, Samsung, Corephotonics, Intel and Mobileye.
Show all 31 entries ↓
Investment activity
2018–2023 · 26 investments
20189201912202132022120231
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