The Best Collections Software
Late payment is still one of the biggest drains on a finance team's time. Collectors chase the same customers every month, reminders go out from spreadsheets, and nobody can say with confidence which invoices will be paid this week. Collections software fixes that, but the market is crowded, and the right choice for a large global business on SAP is rarely the right choice for a growing business on Xero.
This guide does one job: it names the collections software we think fits best for six common types of buyer, and explains why. It is deliberately short. If you want the full independent viewpoint of the market, every vendor and how they compare, our Accounts Receivable Software Options 2026 report is the place to go.
Viewpoint Analysis is a Technology Matchmaker, helping finance leaders find and select the right technology fast - aiming to be the first place buyers go to understand the technology marketplace.
The Short Answer: Best Collections Software by Buyer Type
There is no single best collections platform becuase every business is different - in terms of its location, industry, finance software stack, ERP, size, and lots more variables. Whilst every business and need is invariably a little different, our picks across six main areas are:
Best for | Our pick | Also worth a look |
Large, high-volume enterprise AR teams | HighRadius | Esker |
AI-led collections for fast-growing B2B | Monk | Fazeshift |
Mid-market teams moving off spreadsheets | Kolleno | Quadient AR (YayPay) |
UK and European multinationals | Sidetrade | HighRadius |
SAP-centric finance teams | Serrala | SAP Collections Management |
Reducing disputes through customer self-service | Versapay | Billtrust |
What We Mean by Collections Software
In this guide, collections software means the tools a business uses to collect its own B2B invoices. That covers automated reminders and dunning, prioritised collector worklists, promise-to-pay tracking, dispute handling and reporting on overdue debt.
It does not cover debt collection agency or recovery platforms, which are a different market built for third-party collectors. If your problem is recovering written-off or cross-border debt rather than running day-to-day credit control, this is not the right list.
How We Chose The Best Collections Software
We judged each pick on how well it fits a specific buyer type, not on a single overall score. We looked at five things:
Fit for the buyer type: company size, transaction volume and the shape of the AR team.
ERP integration: how cleanly the platform connects to the systems that buyer is likely to run.
Collections depth: segmented dunning, prioritised worklists, promise-to-pay and dispute handling.
AI that acts, not just advises: whether the platform does the chasing and triage, or only recommends it.
Evidence and presence: real customer outcomes, and the ability to support UK and European buyers.
A word on independence. Viewpoint Analysis keeps full editorial control over what we publish. We work hard to understand the technology market and partner with vendors worldwide. Our opinion is just that - our opinion. We always encourage buyers to spend time looking at the market and make their own decision for their specific requirements.
Our Picks in Detail:
Best for Large, High-Volume Enterprise AR Teams: HighRadius
HighRadius is the platform most often shortlisted when an enterprise wants to run collections at scale. Its AI scores each customer on likely payment behaviour, builds collector worklists around that risk, and automates routine correspondence. Collections sits inside a full order-to-cash suite, so credit, cash application and deductions share the same data.
Who it suits: large organisations with thousands of open invoices, multi-entity AR and an established collections team on SAP, Oracle or another major ERP.
Worth knowing: breadth comes with a larger implementation and price. Smaller teams may pay for capability they will not use.
Also worth a look: Esker, for enterprises that want strong collections alongside wider document automation.
Best for AI-Led Collections in Fast-Growing B2B: Monk
Monk is one of the new AI-native AR platforms, where an agent does the collections work rather than a rules engine. Its collections agent runs context-aware email chasing, a separate voice product handles calls, and the platform also submits invoices into customer AP portals, a common reason enterprise invoices go unpaid. Onboarding is measured in days rather than months.
Who it suits: Monk suits fast-growing and mid-market B2B businesses that want AR automation running quickly without heavy implementation or ongoing admin overhead.
Worth knowing: it is a younger company than the incumbents and developing rapidly with industry-leading technology.
Also worth a look: Fazeshift, another AI-native option built around autonomous AR agents.
ℹ️ Monk is a Viewpoint Analysis Market Partner. Learn more in our Who Are Monk? vendor profile.
Best for Mid-Market Teams Moving Off Spreadsheets: Kolleno
Kolleno is a London-based AR platform designed for finance teams that have outgrown spreadsheet credit control but do not need an enterprise suite. It automates reminders with a tone that can vary by customer, gives collectors one view of every account, and connects to Xero, QuickBooks, Sage and NetSuite. Deployment is quick and the interface is easy to pick up.
Who it suits: UK mid-market and growing businesses without a dedicated AR operations team.
Worth knowing: if you run complex multi-entity AR across several ERPs, ask for references from customers of your size.
Also worth a look: Quadient AR (formerly YayPay), for mid-market teams that want stronger predictive analytics.
Best for UK and European Multinationals: Sidetrade
Sidetrade is a French order-to-cash specialist with a long track record in European collections. Its Aimie AI agents draw on a large data lake of B2B payment behaviour to prioritise accounts and personalise outreach, and the company now operates across Europe, North America and Asia-Pacific. For groups collecting across several European countries, languages and currencies, that footprint matters.
Who it suits: mid-to-large enterprises headquartered in the UK or Europe with international receivables, but also major global vendors.
Worth knowing: it is built for enterprise-scale AR, so a small finance team may find it more than it needs.
Also worth a look: HighRadius, for European enterprises that want a full global order-to-cash suite.
Best for SAP-Centric Finance Teams: Serrala
Serrala has deep roots in SAP and built its AR products to run natively alongside SAP ERP and S/4HANA. Its collections capability covers worklists, dunning, credit and disputes, and in 2026 it added governed AI agents across AR, AP and payments. For SAP shops that want a specialist rather than a generic workflow tool, it is a natural fit.
Who it suits: large SAP-centric organisations, especially those also looking at AP or treasury automation from the same vendor.
Worth knowing: its value is greatest inside SAP landscapes. Teams on other ERPs should test its cloud AR option against their own data.
Also worth a look: SAP Collections Management, for buyers who want to stay entirely inside SAP.
Best for Reducing Disputes Through Customer Self-Service: Versapay
Versapay is built on the idea that many late payments are really unresolved queries. Its collaborative portal lets customers view invoices, raise disputes and pay in one place, with that activity flowing back to the collections team. Collectors spend less time on inbound emails and more on the accounts that need a call.
Who it suits: mid-market businesses where disputes and customer queries are a big driver of DSO, particularly those on NetSuite or Sage Intacct.
Worth knowing: the benefit depends on your customers actually using the portal, so ask vendors for adoption rates from comparable customers.
Also worth a look: Billtrust, for businesses that want to drive electronic payment adoption across their customer base.
Which Collections Buyer Are You?
Answer these five questions before you speak to any vendor. Your answers point you to the right row in the table above.
How big is your AR operation? Thousands of open invoices across entities point to the enterprise picks. A few hundred a month points to the mid-market ones.
Which ERP or accounting system do you run? SAP narrows the field quickly. Xero, QuickBooks, Sage or NetSuite opens up the agile, faster-to-deploy platforms.
Where are your customers? Receivables spread across Europe call for multi-language, multi-currency support from day one.
Why do invoices go unpaid? If it is mostly disputes and queries, prioritise customer self-service. If it is volume and capacity, prioritise automation and AI agents.
How much autonomy will you give the software? Some teams want recommendations they approve. Others are ready for an agent that chases on their behalf.
Want the Full Field?
Six picks are a starting point, not a shortlist. Before you go to market, read our full viewpoint on the key elements - Accounts Receivable, AI Accounts Receivable, and Cash Application Software - see more:
Accounts Receivable Software Options 2026 is the key document for anyone choosing collections software. It covers the leading AR and order-to-cash platforms across enterprise and mid-market tiers, with our viewpoint on each.
AI Accounts Receivable Software Options 2026 explains the difference between AI-native and AI-added platforms, and who leads each group.
Cash Application Software Options 2026 covers the step after collections: matching the payment to the right invoice, which decides how accurate your DSO really is.
Summary
The best collections software is the one that fits your size, your systems and the reason your invoices go unpaid. HighRadius and Serrala lead for large enterprises and SAP shops. Sidetrade suits UK and European multinationals, and Monk leads the new AI-native group for fast-growing and mid-market B2B businesses that want AR automation running quickly.
For the mid-market, Kolleno is the quickest step up from spreadsheets, and Versapay is the pick where disputes drive late payment. Whichever direction you lean, test each platform against your own ERP and your own customer data before you commit.
Talk to Viewpoint Analysis
If you want a shortlist built around your own business rather than our six buyer types, we can help.
The free Longlist Builder gives you a tailored list of collections vendors matched to your size, ERP and requirements in minutes. Just answer a few quick questions and we'll compare your requirements to all of our Software Options reports, and our 4,000+ list of global technology vendors.
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Our Technology Selection Services take you from longlist to decision in weeks. If you need an extra pair of hands to run a super-efficient selection process, let Viewpoint Analysis help you.
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