Tuesday was cleaning day, at least until it became Wednesday. In 2016, Assaf Karmon was hosting a short-term rental in Honolulu and discovering that passive income had a surprisingly talkative middle. He would text a cleaner about a checkout two weeks away. Silence. He would ask someone else, who would agree. Then the first cleaner would resurface and also agree. By the time the apologies were sent, the guest might change the reservation and move the checkout by a day. Everyone could begin again.
It was a small problem with impeccable recurrence. Karmon had the useful misfortune of being both the person annoyed by it and a software engineer capable of making it less annoying. He wrote an application to keep the calendar and the cleaner in step. Then he let other hosts use it for free.
The first money arrived late in 2017. Karmon remembers the sum as something like 35 cents. It is difficult to buy coffee with 35 cents; it is possible to buy conviction. Someone had paid for the removal of a nuisance. That transaction, almost too small for an accounting system to notice, contained the future shape of Turno.
The failure that swept the floor
The origin story has a prologue, and the prologue failed. While earning MBAs at the University of Hawaii's Shidler College of Business, Karmon and his future co-founder, Tim Roy, developed an idea for one-hour daily tidying sessions for busy households. It was called TidyDaily. The business did not find its market.
A bad idea is not necessarily useless. Their customer conversations exposed a more urgent, better-timed need: vacation rentals had to be cleaned between fixed departures and arrivals, often by people coordinating remotely. In an entrepreneurial finance class, the pair redirected the plan. They entered it in the 2017 Pacific Asian Center for Entrepreneurship Business Plan Competition and placed third. Soon afterward, they began building.
Karmon later summarized the lesson as the power of validation and early failures. The phrase is tidy; the experience was probably not. A founder has to abandon the answer without abandoning the evidence. TidyDaily disappeared as a service concept, but its name survived in the legal company, and its failed premise pointed to the narrower, sharper problem that became TurnoverBnB.
“Don't wait! Being a student is a great time to work on new ideas. It might not seem like it but you have more time now than you will ever have. Use it!”Assaf Karmon
An engineer learns to see the market
Karmon was born in Israel and studied computer science at Ben-Gurion University of the Negev. His academic work included a 2009 paper on using genetic programming to evolve solvers for the Rush Hour puzzle. The subject now reads like foreshadowing: movable pieces, constrained space and a path that appears only when the sequence is right.
After university he moved to the United States, worked at startups in New York and joined Conductor, where former colleagues remembered him as pragmatic, patient and able to turn technical decisions into delivered products. He later worked as a senior software engineer at Nokia near Boston. By 2015 he was vice president of engineering at GoShare, a marketplace for pickup-truck owners and people who needed things moved, while studying for his MBA in Honolulu.
That pickup-truck marketplace supplied an important mental model. TurnoverBnB began as scheduling software, a private tool for hosts who already knew their cleaners. In 2018 it added a local marketplace. Hosts could post a job; cleaners could bid; reputation could travel through reviews and completed-project counts. The scheduling tool had become a two-sided business.
One reservation, fewer frantic texts
The distinction matters. Software can organize work; a marketplace can create opportunity. On Turno, cleaning professionals set prices, bid for nearby jobs and accumulate public evidence of reliability. Hosts compare more than a quote. Karmon has described checking the database for cleaners who had grossed more than $200,000 and finding a long list, including one approaching $1 million. The most successful were often small businesses with teams, not solitary gig workers waiting for an algorithm to assign a task.
It is easy to call such a platform “Uber for cleaning,” and not entirely accurate. Turno's model prefers consistency: once a host finds someone dependable, the software keeps that relationship running. The clever bit is less the first match than the hundredth turnover, completed without another Tuesday text.
The burden is a feature
The first years were not clean. Demand reached the tiny company before the company could hire enough people to serve it. Karmon has described nights and weekends spent meeting high expectations with a small budget. His advice to founders is persistence, followed quickly by a second suggestion: find a co-founder who shares the burden and supplies accountability.
Roy, whom Karmon met at Shidler, became that counterpart. Karmon gravitated toward code and product. Roy took the operating role. They worked from Karmon's kitchen table, a pleasingly literal headquarters for a company devoted to whether rooms were ready. The kitchen table eventually gave way to a distributed organization, but the division of labor remained part of the product's logic: clear owners, visible tasks, fewer ambiguous handoffs.
Growth followed. By 2019 the company served 20,000 properties in 70 countries, and Karmon and Roy were named Tech Entrepreneurs of the Year in Hawaii. In August 2021, TurnoverBnB raised a $4.5 million Series A led by RET Ventures, with participation from Blue Startups. The deal was recognized at the 2022 Hawaii Entrepreneur Awards. That year, the company also won Pacific Business News' local innovation bracket by reader vote.
A shorter name for a larger machine
In February 2023, TurnoverBnB became Turno. The old name described the original job with all the grace of a file label. The new one made room for a broader system: calendar connections, automatic scheduling, checklists, photographs, problem reports, inventory reminders, chat and payments. In July, Turno announced that it had become an official Airbnb software partner.
Karmon's preferred operating idea is management by exception. A routine booking should create a routine project. The cleaner should know when to arrive and what to do. Payment should follow completion. A host should be interrupted only when something departs from the plan: nobody accepts the job, a door is broken, the air conditioning fails, the coffee pods vanish. Good automation, in this account, is not the absence of people. It is respect for their attention.
Turno says it now works in six languages, connects to more than 40 channel managers and property-management systems, and includes more than 126,000 cleaning professionals across the United States, Canada, Europe, Australia and elsewhere. Its staff exceeds 150 people across eight countries. Those figures describe reach. The smaller workflow explains why it exists.
“We give hosts and cleaners their time back by automating processes that were manual and time consuming.”Assaf Karmon
Hawaii is not incidental
Karmon could have treated Honolulu as the place where he happened to attend school. Instead, he and Roy kept Turno headquartered in Hawaii while its customer base spread. They hired Shidler graduates, brought in interns and spoke openly about wanting the company to serve as a local example of technology entrepreneurship. Karmon now sits on the board of the Pacific Asian Center for Entrepreneurship, the institution that helped test the original business plan.
The choice has a practical edge. Honolulu's startup community is smaller than those of familiar technology capitals. Karmon has identified access to funding and talent as recurring constraints, while crediting Blue Startups and Hawaii's investor network with helping Turno clear them. Building locally became both a limitation and a promise: if the company worked, it could widen the imagined range of what might be built there.
There is a modesty to Karmon's best public advice. Be persistent. Find a co-founder. Do not wait. These are not secrets, and perhaps that is the point. Turno did not begin with secret technology. It began with an ordinary failure of coordination, noticed by someone willing to stay with it longer than most people would.
A guest will change a date again. A cleaner will be busy. A refrigerator will be missing something obvious. The work does not become glamorous merely because software is present. Karmon's achievement is to have made the mess observable, assignable and, most days, forgettable. The company grew by learning exactly which interruption deserved a human and which one could quietly clean up after itself.