A box can arrive on time and still have a terrible journey. The delivery record may be immaculate. The contents may be ruined. Somewhere between departure and arrival, a temperature changed, a load tilted, or an impact left its mark. The paperwork has a destination and a signature. The box has a story, and very little opportunity to tell it.
Daniel J. Yun came to this problem through the business of moving fresh food. He had warehouses and trucks, the tangible apparatus of logistics. What he lacked was a dependable account of what happened to the goods between handoffs. Losses could be observed; their causes were harder to establish. Experience helped people form an opinion. It did considerably less to settle an argument.
That distinction runs through his work as co-founder and co-CEO of Willog, the Seoul-based company he leads alongside fellow co-founder Sunghoon Bae. Yun’s subject is the physical condition of cargo: the small events that disappear while a shipment proceeds through a perfectly respectable sequence of addresses. His business gives those events a record. Increasingly, it also gives that record a job.
A warehouse education
Yun was working in fresh-food distribution from 2017. In that setting, he encountered a sharp information gap between suppliers and consumers. A product moved through a chain of people, but knowledge about its treatment did not necessarily travel with it. The person receiving it could see the result without seeing the process that produced it.
The appeal of solving that gap was practical. A recurring loss is expensive enough. A recurring loss whose cause remains uncertain comes with an additional indignity: the next shipment can encounter the same problem. Everyone may be experienced, diligent, and perfectly sincere. Sincerity is a poor thermometer.
Willog is Yun’s fourth startup. His professional background includes operating traditional logistics businesses and completing graduate and doctoral coursework in logistics. The combination matters to the story because it places the problem close to his own working life. He had handled the movement of products before he began selling a means of understanding that movement.
He began preparing the new venture around 2019 while still running his previous business, paid for an initial prototype himself, and took it to investors in 2021. Temperature was the first problem he chose to tackle. It offered a specific starting point for a much larger ambition: turning a shipment’s physical history into information people could use.
The usefulness of an ordinary phone
An early Willog device, OTQ, made an instructive choice about how information should leave the box. It generated QR codes containing logistics records. A driver or recipient could scan the code with a smartphone and access the history. The device collected the readings; the phone supplied a familiar way to retrieve them.
The detail is easy to overlook beside the larger vocabulary of artificial intelligence. Yet it gets close to the original business problem. A record that requires awkward handling is another task for someone already managing a delivery. A readable code puts the information within reach at the moment the goods change hands.
Yun described the system in 2022 as an alternative to repeatedly connecting and disconnecting USB-style loggers to collect data. The readings were also stored in the monitoring software. The work extended beyond a gadget attached to a container: it involved how information was collected, preserved, and made accessible to the people handling a shipment.
In the photograph, the blue devices occupy very little space beside the framed certificates. That is a useful visual proportion. A small piece of hardware carries the measurement; a much larger set of expectations surrounds whether that measurement will be trusted. Yun’s work has had to address both.
When the cargo changes vehicles
Willog’s Korean company was established in May 2021. Its official history records Series A investment that July and a US branch that October. By October 2023, it had secured Series B investment. The dates describe a company moving quickly through financing stages, but the more revealing progression is the expansion of what it tries to observe.
Today its sensors capture temperature, humidity, shock, tilt, and light. Its monitoring software connects warehouses, vehicles, and international transport. A shipment may spend time sitting still before it begins its most visible journey. Including the warehouse brings that less theatrical portion of the trip into the same account.
Control Tower, Willog’s monitoring product, combines vehicle locations and cargo-hold temperatures on a map, uses three-dimensional warehouse views, and connects records across import and export segments. For air and sea transport, its product description includes data logging during the journey and automatic upload upon arrival. Different legs require different ways of gathering the record.
There is a quiet complication here. Moving a box through several environments does not make those environments behave alike. A warehouse, a truck, and an ocean voyage have different rhythms. The useful achievement is making their records intelligible together, so the receiving team can follow the goods rather than assemble a scrapbook of disconnected readings.
“We are turning invisible events into intelligence and action.”
Daniel Yun
A number needs a place to land
The business now reaches beyond collecting conditions to interpreting them. Willog describes a sequence that begins with visibility, proceeds through diagnosis, alerts, and action, and moves toward supply-chain improvement and risk prediction. Each step gives the same underlying information a different use. A reading can reveal an event; a pattern can inform a later decision.
Yun has described a project with a global e-commerce customer in which digital-twin mapping helped identify thermal weak spots inside a fulfilment centre. A broad suspicion about a building became a more specific view of the locations and conditions associated with deviations. That specificity gave the customer something concrete to address.
A warehouse-wide warning leaves considerable room for interpretation. A particular zone, a repeatable condition, and a record of recurrence narrow the question. The difference resembles the distance between being told that your house is draughty and being shown the window that will not close. The latter gives you somewhere to put your hands.
This is also where Yun places the value of operational experience. Context determines what a measurement means for a particular cargo and process. A number becomes useful when someone can connect it to the goods, the surroundings, and the decision at hand. Collecting more numbers alone does not perform that work.
From a record to a remedy
On September 17, 2026, Willog launched Willog Vision, bringing four modules into one platform: Willog Safe, Control Tower, Intelligence, and Insurance. The company describes their functions as record, response, prove, and compensation. The sequence follows an incident from its first measurement through the administrative consequences.
The launch announcement describes automated claims, data-based insurance plans, and support for disposal and re-shipment costs. Existing customers are to receive the platform in phases. For Yun, insurance extends the same concern that began with an unexplained loss: a dependable record should help determine what happens after the goods are damaged, too.
That connection gives the original sensor a second audience. An operations team wants information it can act on. An insurance process needs evidence about the event behind a claim. Bringing those uses together asks one record to survive both the urgency of a shipment and the slower business of assigning financial consequences.
The smiley face after Series B
Yun’s public language occasionally leaves the technical vocabulary behind. Announcing the Series B round on LinkedIn, he thanked the team with a short message: “Thanks to Willogers!!!” The exclamation marks do their own modest piece of character work. A funding round becomes an occasion to acknowledge the people inside the company.
He also announced Willog’s participation at SCM Fair 2024 in Kintex, South Korea. In 2023, the company introduced MentorTalk, an interview initiative intended to help logistics professionals and job seekers understand different roles across the industry. Yun explained the need in terms of a sector changing so quickly that even its own workers could struggle to understand one another’s jobs.
These are smaller details than a financing announcement, but they widen the picture of his work. The business depends on people understanding processes across organisational boundaries. That applies to the driver and the recipient, and to colleagues whose responsibilities intersect without being identical. A supply chain has plenty of handoffs before anyone picks up a box.
The next shipment
In May 2026, Willog announced Series B-2 investment backed by seven investors, including KB Investment, IBK Capital, Muirwoods Ventures, and Big Basin Capital. It reported more than 200 enterprise customers and expansion into the United States, Singapore, and Japan. The company also reported zero customer churn over five consecutive years; that remains a company-reported measure of retention.
For Yun, the next stage is about putting the accumulated records to work earlier. His stated ambition is to move logistics toward prediction and prevention. The warehouse operator’s original question still sits underneath the wider platform: what happened to the goods, and what can the people responsible do with that knowledge?
A shipment will always need to reach its destination. Yun has spent this chapter of his career insisting that its history should arrive as well. The box may be quiet. The record need not be.