How Zartis Achieved a 90% On-Time Payment Rate with Kolleno

Zartis is a digital solutions company that helps businesses worldwide navigate technical challenges, from product development and team augmentation to technology consulting. Recognized as a Deloitte Fast 50 company, they are no stranger to complexity, building and scaling technology for clients across a wide range of industries.

Headquartered in Cork, Ireland, Zartis has grown to more than 250 employees while expanding its global footprint. That growth is built on a reputation for delivering high-quality digital solutions and pairing clients with the technical talent and expertise they need to move fast.

As Zartis expanded its global footprint, its accounts receivable process could not keep pace. The company serves a wide variety of industries, each with its own billing cycle and terms, so as active accounts climbed, the volume of invoices ballooned. Without automation, that increase meant long hours spent chasing payments, reconciling accounts by hand, and updating internal spreadsheets.

Making matters harder, the team had no central platform to work from. Client communications lived in one tool, payment updates in another, and reporting in yet another. Jumping between systems led to missed follow-ups, delayed decisions, and no real way to triage collections. With no live view of aging balances, every account was treated with the same urgency, so high-risk invoices did not always get the attention they needed.

Kolleno gave Zartis one end-to-end system instead of a stack of disconnected tools. Rather than solving a single piece of the puzzle, it became the single source of truth the team needed to bring order and clarity to their receivables.

The foundation was a seamless integration with Microsoft Business Central. Real-time, bi-directional data flow meant customer records, invoice statuses, and payment updates were reflected across both platforms automatically. A payment made through the Kolleno portal showed up instantly in Business Central, and a new invoice created in Business Central was picked up without delay. The manual reconciling and chasing of missing updates simply disappeared.

On top of that foundation sat a centralized, real-time dashboard that turned reporting into a command center. The team could sort portfolios by risk level, aging bucket, or customer segment, and Kolleno’s built-in task manager kept everyone clear on who needed to do what and when. Meanwhile, a fully branded customer payments portal let clients view balances, download invoices, and pay immediately in multiple currencies, which removed friction for international clients and cut down inbound queries.

Once everything lived in one place, the results followed quickly. Within the first few months, Zartis saw a 38% reduction in median days late, 12 hours saved per week on manual tasks, and 90% of payments collected on time. Balances that used to slip through the cracks were now getting collected.

The bigger change was how the team spent its time. With less time chasing payments and more clarity around AR performance, the finance function shifted from reactive to proactive and from fragmented to fully aligned. The dashboard became a daily operating system, the payments portal improved the customer experience, and the Business Central integration kept accuracy intact at every step. Departments across the business, from sales to customer success to operations, began leaning on Kolleno’s real-time insights to guide their own decisions.