Lunos develops AI agents that act as virtual coworkers for business finance teams, automating the tedious, day-to-day work of accounts receivable, such as tracking payments, following up on overdue invoices, and handling customer correspondence in a human-like, personalized manner. Pulse 2.0 interviewed Lunos founder and CEO Duncan Barrigan to learn more.
Duncan Barrigan’s Background
What is Duncan Barrigan’s professional background and what led him into AR and payments? Duncan Barrigan previously served as Chief Product Officer at GoCardless, where he helped scale one of Europe’s leading B2B payments companies from $1m ARR to >$150m ARR. Working closely with hundreds of finance teams, he saw that while payment rails improved, accounts receivable remained deeply manual… it has largely been driven by emails, spreadsheets, and fragmented systems. A defining moment was seeing how manual AR was even at highly technical companies like Uber. This disconnect inspired him to found Lunos in 2024 to tackle receivables with AI.
Formation Of The Company
How did the idea for Lunos come together? Barrigan said:
“The idea for Lunos emerged from a clear gap in the market. Enterprise AR platforms are typically difficult and expensive to implement, and still need large teams of people to operate them, while SMB tools often rely on generic reminders that customers ignore. Duncan realized AI agents could replicate how skilled AR professionals actually work – for example, reading context, handling two-way conversations, tracking promises, and escalating when needed, all while integrating into existing systems. Lunos was built to go live in days, not months, and scale from SMBs to mid-market companies.”
Favorite Moment
What has been your favorite moment building Lunos so far? Barrigan reflected:
“Lunos’ public launch in September 2025, when the team brought a real cowboy and horse to Wall Street to highlight AR as the “Wild West” of B2B payments. The stunt drew journalists, social media attention, and sparked conversations far beyond traditional SaaS launches. More importantly, it set the tone for Lunos: finance software doesn’t have to be boring.”
Products & Features
What does Lunos do? Barrigan explained:
“Lunos offers AI agents that are trained in accounts receivable to automate collections end-to-end. Our platform sends personalized payment reminders, manages two-way customer conversations, tracks payment promises, and escalates issues to humans when needed. It integrates with accounting systems (QuickBooks, NetSuite, Xero, Sage Intacct), CRMs, and communication tools. Customers can run Lunos in Monitor, Suggest, or fully autonomous Act Mode.”
Challenges Faced
What challenges have you faced and how have you overcome them? Barrigan acknowledged:
“The biggest challenge has been skepticism toward AR automation, often associated with spammy reminder tools. Lunos overcomes this by starting customers in Suggest Mode, offering full transparency into every action, and proving value quickly through fast pilots that show reduced DSO, lower AR balances, and time saved.”
Evolution Of The Company’s Technology
How has the product evolved since launch? Barrigan noted:
“Early versions focused on simple email reminders. Today, Lunos handles multi-threaded conversations across multiple invoices, learns customer behavior automatically, operates across Slack, email, and web, and integrates deeply with finance systems. Deployment time has dropped to under five days, and around 40% of customers move to full autonomy within 30 days.”
Milestones
What have been the most significant milestones so far? Barrigan cited:
“Key milestones include a public launch in September 2025, raising $5 million in pre-seed funding co-led by General Catalyst and Cherry Ventures, signing paying customers across SaaS, media, services, and manufacturing, and closing the first enterprise deal in January 2026. Lunos now integrates with major accounting platforms and is expanding partnerships across payments and finance ecosystems.”
Customer Success
Can you share examples of impact? Barrigan highlighted:
“Yes, please find two below:
— Workweek Media reduced overdue AR by 61% in two months and saved over 80 hours through automated collections and full visibility into customer payments.
— Revela, a B2B SaaS company, saved 35+ hours per month and moved entirely to autonomous collections with zero negative customer feedback.
Funding & Revenue
What can you share publicly? Barrigan revealed:
“Lunos raised $5 million in pre-seed funding in September 2025. The company is in early commercial stages with paying customers and is on track for seven-figure ARR in early 2026. Pricing is based on a small percentage of managed AR, with self-serve, mid-market, and enterprise tiers.”
Total Addressable Market
What market are you pursuing? Barrigan assessed:
Lunos targets the invoice-to-cash layer of over $100 trillion in annual global B2B trade. Initially, the focus is mid-market B2B companies with $10M–$500M in revenue. The broader invoice-to-cash software market could be as high as $100B annually, with the initial mid-market B2B segment likely around $17B and expanding as AI enables new levels of automation.
Differentiation
What sets Lunos apart? Barrigan affirmed:
“Lunos is an AI worker, not workflow software. It learns by observing real AR behavior rather than relying on rigid rules. It layers on top of existing billing and payment systems, deploys in days, offers full transparency and control, and delivers measurable ROI quickly. The mid-market AR segment remains largely underserved by incumbents.”
Future Goals
What are your priorities for the next 12 months? Barrigan emphasized:
“We’re rapidly adding more agents to our AR suite, such as payment orchestration agents to help you get every customer on the right payment method for you. Later this year we’ll be launching our product for accounts payable and executing the first agent-to-agent payments on our network. Commercially we’re growing the team and increasingly serving enterprise customers, too. ”
Long-Term Vision
What larger shift is Lunos driving? Barrigan concluded:
“Lunos is built on the belief that B2B payments are fundamentally a communication and negotiation problem, not a payments rails problem. Today, most of the $100 trillion global B2B economy still runs on emails and manual coordination. This leads to wasted time, errors, and delays in payments. Conversely, AI agents make it possible for machines to handle contextual, negotiated communication at scale. Lunos is solving this problem by providing agent-to-agent B2B commerce, where invoices, payment timing, and liquidity are negotiated continuously, and humans set the objectives and constraints. This shift has the potential to dramatically reduce cash flow friction and make receivables truly liquid.”
