Guesty has completed the acquisition of French vacation-rental software company Smily, formerly known as BookingSync, strengthening its position in one of the world’s largest short-term rental markets as artificial intelligence, automation and software consolidation reshape the technology used by professional property managers.
The transaction was announced on September 17, 2026, although financial terms were not disclosed. Smily’s five founders and a group of existing shareholders are reinvesting part of their proceeds into Guesty equity, giving them continued exposure to the combined business rather than making a complete exit from the short-term rental technology sector.
The acquisition brings together Guesty’s global property-management platform with a French company that has spent more than 15 years developing software for vacation-rental operators. Smily has processed more than €3.3 billion of bookings for approximately 13 million travellers since opening its platform to paying customers in 2010, creating an established base of transaction and operating experience that Guesty can now combine with its broader artificial intelligence strategy.
Why is Guesty acquiring Smily in France?
France represents the central strategic rationale for the transaction. Guesty said the country has more than one million active short-term rental listings and generated approximately $9 billion of gross booking value through online travel agencies during the past year, making it the second-largest short-term rental market globally.
Acquiring an established local platform gives Guesty a faster route into that market than relying entirely on organic customer acquisition. Smily already serves French vacation-rental managers and has built integrations, customer relationships and operational knowledge around the specific requirements of professional hosts operating in France and other European markets.
That local expertise matters because property-management software becomes deeply embedded in the daily operations of rental businesses. Operators use the systems to coordinate availability, pricing, reservations, payments, guest communication and listings across multiple distribution channels, making switching providers more complicated than replacing a basic standalone software product.
What does Smily add to Guesty’s short-term rental technology platform?
Smily combines a property management system with channel-management software, direct-booking websites and payment capabilities. The platform is designed to allow property managers to operate listings across major booking channels while coordinating reservations and other operational tasks from a central system.
The company’s history stretches back to 2005, when founder Sébastien Grosjean originally built the technology to manage his family’s vacation-rental business. The system was opened to paying customers in 2010 and subsequently developed into BookingSync before being rebranded as Smily.
As of August 31, 2026, Smily had processed more than €3.3 billion in bookings involving about 13 million travellers. It has also maintained the highest tier of Booking.com’s Connectivity Partner Programme for eight consecutive years, most recently receiving Premier Plus Connectivity Partner status for 2026.
Guesty therefore gains more than a customer list. It acquires a mature French product, an experienced engineering and support team and years of operational data from property managers ranging from businesses handling small portfolios to operators managing hundreds or even thousands of rental units.
How large has Guesty become before the Smily acquisition?
Guesty has expanded from property-management software into a broader technology platform covering revenue management, guest communication, operations and finance. The privately held company says its technology is now used across more than 500,000 properties in over 100 countries, giving the business considerably greater international scale than Smily.
Guesty is integrated with major online travel platforms including Airbnb, Booking.com, Vrbo, Expedia, Tripadvisor, Hopper, Google Travel and Homes & Villas by Marriott. Those connections are important because professional property managers increasingly distribute the same accommodation across multiple booking channels and need availability and pricing to remain synchronised.
The company has attracted approximately $410 million of funding from investors including KKR, Apax Digital Fund, Inovia Capital, DFO Management, Sixth Street Growth, Viola Growth and Flashpoint. That capital base has supported both product investment and international expansion as Guesty attempts to build greater scale in a fragmented property-technology market.
Why is artificial intelligence important to the Guesty and Smily combination?
Guesty is increasingly positioning artificial intelligence as a central part of its product strategy rather than simply an additional software feature. Its platform uses artificial intelligence agents across areas including revenue, operations, communications and finance, with the company seeking to automate repetitive tasks that traditionally require manual intervention from property managers.
The company said it has released more than 300 product features during 2026. Following the acquisition, Guesty plans to bring its artificial intelligence capabilities and Agent Hub to Smily customers while combining product development, engineering and customer-support resources from the two organisations.
The potential commercial benefit is straightforward. Professional property managers often add operational complexity as their portfolios grow because every additional property creates more guest messages, reservations, pricing decisions, cleaning schedules and payment activity. Automation that allows operators to increase the number of properties they manage without expanding headcount at the same rate could become a significant competitive differentiator for software providers.
Why are Smily’s founders reinvesting in Guesty?
The decision by all five Smily founders and some existing shareholders to reinvest part of their acquisition proceeds into Guesty is notable because it aligns their financial interests with the future performance of the combined platform. The structure suggests the transaction is being positioned as a combination designed to create additional growth rather than simply an acquisition followed by the immediate departure of Smily’s existing owners.
Guesty has not disclosed how much equity the Smily shareholders will receive or what valuation was used for the reinvestment. The undisclosed transaction value also prevents investors and industry observers from calculating acquisition multiples based on Smily’s revenue, customers or booking volume.
Operational integration will therefore become the more useful measure of success. Guesty will need to retain Smily customers while introducing its wider product suite without disrupting the platform relationships that have been built over more than a decade in France.
Could the Smily acquisition accelerate consolidation in vacation-rental software?
The transaction illustrates how the technology layer behind short-term rentals is becoming increasingly important as professional operators scale across Airbnb, Booking.com and other distribution platforms. Property-management systems have moved beyond reservation calendars toward broader operating platforms covering payments, revenue optimisation, communications and automation.
That evolution favours providers capable of investing heavily in software development while supporting customers across multiple countries. Smaller regional platforms can retain advantages in local relationships and market knowledge, but they face growing requirements to invest in artificial intelligence, payments, cybersecurity, integrations and global distribution connectivity.
Guesty’s acquisition strategy can potentially combine those two strengths by adding established regional platforms while continuing to develop technology at a larger global scale. Smily gives the company an immediate increase in French expertise and market reach while Guesty gives Smily customers access to a broader research and development organisation and international product ecosystem.
What should the technology industry watch after Guesty acquires Smily?
The transaction has already closed, so attention now shifts directly to integration. Guesty said the two teams will combine product, engineering and support resources while continuing to work with Smily customers, making customer retention and product migration important indicators of whether the acquisition delivers the intended benefits.
France will also provide an important test of Guesty’s ability to translate its global artificial intelligence strategy into a large regional market with established local competitors and experienced professional operators. With more than one million active listings and roughly $9 billion of annual online travel agency booking value, even incremental gains in software penetration could represent a meaningful commercial opportunity.
The acquisition ultimately reflects a wider shift in hospitality technology toward larger platforms capable of connecting distribution, operations, payments and artificial intelligence in a single system. By acquiring Smily, Guesty is betting that combining international technology scale with deeply rooted local expertise will provide a stronger route to growth in France than attempting to build that position from scratch.
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