For growing companies, issuing an invoice is only the beginning. When payment does not arrive on time, finance teams have to monitor overdue accounts, send follow-ups, handle exceptions, decide when to escalate, and keep management updated. As the number of invoices and customers grows, this work turns into an increasingly manual operation run through spreadsheets, email threads, and basic accounting-system reminders.
ERP and accounting systems can usually send a standard payment reminder. They do not run a collections process around the way a company actually works: which customers need a different approach, when an overdue payment should be escalated, what exceptions matter, or when a finance professional needs to step in. The result is a process that directly affects cash flow, but still takes up dozens of hours of manual work.
sunbay.io was founded by Filip Szczeciński, CEO, Dawid Dzierzyński, CRO, and Nikodem Cabała, CTO. The idea emerged from Filip’s conversations with CFOs and CEOs of technology companies about the processes that consumed the most time inside their teams. One of the first people he called was Dawid, who worked in finance at tech companies. Instead of becoming a customer, he joined as a co-founder.
"In our conversations with CFOs and CEOs, one sentence kept coming back: 'I hate working with invoices.' It wasn't that companies didn't know how to collect their receivables. The problem was that a process that directly affects their liquidity still depends on manual work. We built sunbay.io so that companies can automate this process on their own terms and bring the team in only where human judgement is actually needed."
Nikodem joined the team once the first companies committed to paying for the product, bringing a combination of finance and software engineering experience, including projects for mBank and Metro Bank. The first customers were live on the platform within two weeks. After signing with five companies, the founders decided to build sunbay.io full-time.
The platform connects directly to invoice data and runs the receivables process according to each customer’s collection rules. It follows up on overdue payments via email, SMS, and AI voice calls, handles escalations, provides customers with a branded payment portal to settle invoices, and brings the finance team into the loop only when a case requires a decision.
The model is already producing measurable results. At Tequipy, sunbay.io cut the average time to payment from 26 to 14 days while the company scaled to €1M a month. It also reduced collections work by more than 40 hours a week and helped bring invoices 90+ days overdue down to zero. Flowmore shortened the time needed to recover payments by 27 days. Today, more than 20 companies in five countries use the platform to collect payments from customers across 30 markets.
“As we grew, handling collections started taking up more and more of our time. sunbay.io helped us organise and automate that process, freeing up more than 40 hours a week and allowing the team to focus on more important work.”
sunbay.io is now building the next layer of its platform. The product already surfaces credit scoring and payment-behaviour signals next to each customer, helping finance teams act on accounts likely to slip before they reach 90+ days overdue. Next come AI agents that will handle further manual tasks, analyse payment data and help finance teams decide faster where intervention is needed.
The product is built for European finance teams, with customer and receivables data kept in the EEA, no transatlantic data transfers, and GDPR compliance built in.
“sunbay.io is solving a problem that costs fast-growing companies far more than finance teams’ time. Slow collections stretch the cash-conversion cycle and put pressure on profitability. Filip, Dawid and Nikodem combine product, finance and operational experience in a way we rarely see. That is what gives them a real chance to build the European platform for receivables, not just another collections tool.”
