Calculus Capital
Calculus Capital is a London-based venture capital and private equity firm focused on established and mature small and medium-sized UK companies. It targets growth and expansion investments, management buyouts or buy-ins, acquisitions, and financing for generational change, as well as pre-IPO finance and growth capital across various sectors including media, energy, software and services, healthcare, manufacturing, and transportation. The firm typically invests between £2 million and £5 million in companies with positive EBITDA and annual sales of up to £50 million, and it commonly takes a board seat. Investments are generally held for about four to five years. Founded in 1999, Calculus Capital operates from London and concentrates on United Kingdom-based opportunities rather than startups or overseas ventures.
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Past deals in Hotel
Booked It
Seed Round in 2025
Booked It is an online bookings management software company focused on transforming the leisure, hospitality, and entertainment sectors. Its platform offers customizable technology and innovative marketing solutions that seamlessly integrate with various applications and services. By leveraging data, Booked It enables businesses to implement highly targeted marketing campaigns aimed at enhancing customer experiences, driving foot traffic, and boosting revenue. The company's approach not only streamlines booking processes but also provides valuable insights that support effective decision-making within the industry.
Avvio
Venture Round in 2014
Avvio is a leading direct booking platform and digital agency that specializes in enhancing the online presence of hotels and accommodation providers. Established in 2002 and headquartered in Limerick, with additional offices in Dublin, London, and New York, the company focuses on driving growth in direct bookings while minimizing reliance on online travel agencies. Avvio made a significant breakthrough in October 2017 by introducing the world's first AI-driven booking engine tailored for the hospitality industry. This innovative platform, known as Allora, utilizes advanced machine learning and AI technologies to enhance the visitor experience and increase booking likelihood. Avvio offers a comprehensive suite of booking technologies, including a smart booking engine, split testing services, and third-party integration, alongside exceptional website design and digital marketing solutions. The company supports hundreds of hotels globally, empowering them to improve their online distribution strategies and maximize profitability per booking.
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