sunbay.io raises €550K to automate invoice collection for finance teams

Warsaw-based sunbay.io, a platform helping finance teams recover overdue invoices faster, has raised €550,000 in funding from Kogito Ventures, with participation from s20 and a group of angel investors, including Jostein Håvaldsrud, CTO of Kahoot. The company already works with more than 20 businesses across five countries, collecting payments from customers in 30 markets.

For growing companies, collecting overdue payments is often a manual and time-consuming process. Finance teams must track outstanding invoices, send follow-ups, manage exceptions and decide when to escalate cases, often relying on spreadsheets, email threads and basic accounting-system reminders.

While ERP and accounting platforms can send standard payment reminders, they are not designed to manage collections according to each company's workflows and customer relationships. As a result, a process that directly affects cash flow still requires significant manual effort.

sunbay.io was founded by Filip Szczeciński, Dawid Dzierzyński and Nikodem Cabała after conversations with finance leaders revealed how much time teams spent managing receivables. The founders set out to automate the process while keeping finance professionals involved where judgement is needed.

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,

says Filip Szczeciński, co-founder of sunbay.io.

The platform connects directly to invoice data and automates collections according to each company's rules. It follows up on overdue payments via email, SMS and AI voice calls, manages escalations, provides a branded payment portal and involves finance teams only when decisions require human input.

sunbay.io is now expanding the platform with predictive insights and additional automation. The product already surfaces credit-scoring and payment-behaviour signals to help teams identify at-risk accounts before they become seriously overdue. Future AI agents will automate further tasks, analyse payment data and support faster decision-making.

Built for European finance teams, the platform keeps customer and receivables data within the EEA, avoids transatlantic data transfers and is designed with GDPR compliance at its core.