UK SMEs lose an estimated £23,000 per year to late payments, and over half report that cash flow problems — not a lack of customers — are the biggest constraint on their growth. Manually chasing invoices by email consumes 15+ hours a week for most finance teams and still misses the invoices most likely to default.
Accounts receivable (AR) automation software fixes this by connecting to your accounting platform, running outreach sequences automatically, and — in the most advanced tools — using AI to predict which invoices will go late before the due date arrives.
This guide covers the 6 best AR automation tools for UK SMEs in 2026, ranked and compared by:
We've based this comparison on publicly available product information, G2/Capterra ratings, and hands-on evaluation. No sponsored rankings.
| Factor | Weight |
|---|---|
| UK accounting integrations | High |
| AI / predictive capability | High |
| Pricing accessibility for SMEs | High |
| Multi-channel outreach | Medium |
| Setup speed | Medium |
| Human escalation option | Low |
| Enterprise compliance | Low |
Starting price: £49/month | Free trial: Yes | UK-focused: Yes
Equisettle is purpose-built for UK SMEs and the only platform in this list that combines AI-powered predictive analytics, WhatsApp/SMS outreach, and native FreeAgent integration — all at an SME-accessible price point.
Its machine learning model identifies invoices at risk of late payment up to 14 weeks in advance with 94% accuracy, enabling finance teams to act proactively rather than chasing after the fact. Automated outreach runs across email, SMS, and WhatsApp without manual intervention, and the platform integrates natively with FreeAgent, Xero, QuickBooks, and Sage.
Teams typically go live within 48 hours. There's no credit card required for the free trial.
Strengths: - Predictive AI across the full invoice portfolio - WhatsApp + SMS outreach (higher response rates than email alone) - Native FreeAgent and Sage support — covers the full UK SME accounting stack - Lowest starting price in this comparison - 48-hour setup
Weaknesses: - No human collections escalation service - No NetSuite/ERP integration for larger businesses - Smaller user base than established competitors
Best for: UK SMEs on FreeAgent, Xero, QuickBooks, or Sage that want proactive, AI-led collections at an accessible price.
[Try Equisettle free →]
Starting price: £199/month | Free trial: Yes | UK-focused: Yes
Chaser is a London-based platform founded in 2014 with over 10,000 users worldwide. It's one of the most recognised AR automation tools in the UK market, holding the Xero App Partner of the Year 2023 award.
Its core approach is rule-based: you configure escalation sequences that trigger based on invoice age, and Chaser handles execution. What makes it unique is the optional Care add-on (from £324/month), which provides access to a human credit control team for complex dispute management and phone-based collections.
Chaser works via email only — no WhatsApp or SMS — and does not support FreeAgent or Sage. Its entry price (£199/month) is 4× higher than Equisettle's.
Strengths: - Established platform with strong UK accounting community trust - Human collections escalation via Care add-on - Good Xero integration (Xero App of the Year) - Multi-entity support on Core plans
Weaknesses: - Email-only outreach (no WhatsApp or SMS) - No FreeAgent or Sage integration - No predictive AI — purely rule-based - High starting price for SMEs
Best for: Established UK mid-market businesses willing to pay premium pricing for a trusted platform with optional human collections support.
Starting price: Custom (contact sales) | Free trial: No | UK-focused: Mixed (UK/EU/Enterprise)
Kolleno is an AI-powered AR platform built "by and for finance professionals." Its differentiator is depth of integration: it connects to Xero, QuickBooks, NetSuite, Salesforce, and other ERPs and CRMs simultaneously, unifying data from multiple systems for context-sensitive collections decisions.
Its 2026 feature set includes enhanced payment controls (customer portfolio payment limits), a global document repository, and embedded payment reconciliation — capabilities that go beyond pure AR automation into financial operations management.
There is no free trial and pricing is custom (sales-required). This makes Kolleno less accessible for SMEs evaluating tools on a budget.
Strengths: - Deep multi-system integration (ERP, CRM, accounting) - AI-powered workflow execution with context from all connected systems - Embedded payment reconciliation - Strong feature set for complex, multi-entity finance operations
Weaknesses: - No free trial - No published pricing — requires sales engagement - No FreeAgent or Sage support - Longer implementation cycle than SME-focused tools
Best for: Mid-market finance teams with complex ERP environments (NetSuite, Salesforce) that need a unified AR and reconciliation platform.
Starting price: $0 (Discover) / Custom (paid plans) | Free trial: Yes (limited) | Primary market: US / Global
Upflow is a US-founded AR platform particularly well-suited to SaaS and subscription businesses. Its free Discover tier provides ongoing AR health analytics and peer benchmarking at no cost — a genuine entry point that no other tool in this list matches for zero-cost value.
Its AI feature tags "Promise to Pay" signals from customer email replies, improving cash flow forecast accuracy without manual data entry. It integrates with Chargebee, Stripe Billing, NetSuite, HubSpot, and Salesforce — a stack built for US SaaS companies.
It does not support FreeAgent or Sage. Paid plans are priced by ARR tier (custom) and require a sales conversation.
Strengths: - Free Discover tier for ongoing AR analytics - Strong SaaS/subscription billing integrations (Chargebee, Stripe) - SOC 2 Type II certified - AI Promise-to-Pay tagging from email communications
Weaknesses: - US-first; limited UK accounting coverage (no FreeAgent, no Sage) - No WhatsApp or SMS outreach - Paid plans require ARR-based custom pricing - Less relevant for invoice-based UK SMEs
Best for: SaaS/subscription businesses with Chargebee, NetSuite, or US enterprise procurement requirements.
Starting price: £500+/month (custom) | Free trial: Not widely available | UK-focused: Yes
Credit Hound is a comprehensive credit management platform with deep functionality for risk assessment, credit limit management, and multi-step collections workflows. It's built for large businesses with dedicated credit control teams — not SMEs.
Its feature depth is its strength: detailed debtor risk scoring, credit limit management, integration with credit reference agencies, and granular collections workflow control. But this depth comes with complexity and cost that most SMEs don't need.
Strengths: - Comprehensive credit risk management - Suitable for businesses with dedicated credit departments - Deep workflow configuration options
Weaknesses: - Pricing (£500+/month) excludes most SMEs - Complexity is overkill for teams under 10 people - No AI-predictive analytics at the SME level
Best for: Large businesses with revenue above £20M and dedicated credit control departments.
Starting price: Not publicly disclosed | Free trial: Not confirmed | Market: US / Global
Gaviti is a well-rated AR automation platform (4.5/5 on G2, 91 reviews) that deserves a mention for teams evaluating a broad shortlist. It focuses on collections workflow automation with collaboration features for AR teams.
It does not appear to have FreeAgent or Sage integration for UK users, and pricing is not publicly listed. It's included here as a monitor-worthy alternative for UK businesses that find the above tools don't fit, particularly those with US operations.
Best for: Teams seeking an alternative to the above with a strong G2 track record; requires direct evaluation for UK-specific fit.
| Equisettle | Chaser | Kolleno | Upflow | Credit Hound | Gaviti | |
|---|---|---|---|---|---|---|
| Starting price | £49/mo | £199/mo | Custom | $0/Custom | £500+/mo | Custom |
| Free trial | Yes | Yes | No | Yes (limited) | No | Not confirmed |
| AI predictions | Yes 14-wk | No | Yes | Yes (limited) | No | No |
| Yes | No | No | No | No | No | |
| SMS | Yes | No | No | No | No | No |
| FreeAgent | Yes | No | No | No | No | No |
| Sage | Yes | No | No | No | Yes | No |
| Xero | Yes | Yes | Yes | Yes | Yes | Yes |
| QuickBooks | Yes | Yes | Yes | Yes | Yes | Yes |
| Human escalation | No | Yes | No | No | Yes | No |
| Setup time | 48 hrs | Days–weeks | Weeks | Days | Weeks | Not specified |
| UK-first | Yes | Yes | Mixed | No | Yes | No |
Pricing as of April 2026.
Choose Equisettle if: You're a UK SME on FreeAgent, Xero, QuickBooks, or Sage and want proactive AI collections at the lowest price with the fastest setup.
Choose Chaser if: You're a mid-market UK business that values rule-based workflows, an established platform, and optional human collections escalation.
Choose Kolleno if: You're a mid-market finance team running NetSuite, Salesforce, or multiple ERPs and need a unified AR and reconciliation platform.
Choose Upflow if: You're a SaaS business using Chargebee or Stripe Billing, or want free AR analytics before committing to paid automation.
Choose Credit Hound if: You're a large business (£20M+ revenue) with a dedicated credit control team needing full credit management features.
Choose Gaviti if: None of the above fit and you want to evaluate a strong G2-rated alternative.
What is accounts receivable automation software? AR automation software connects to your accounting platform, tracks invoice due dates and payment status, and automatically sends payment reminders and follow-ups to customers — replacing the manual work of chasing invoices by email or phone.
What's the best AR software for FreeAgent users? Equisettle is the only platform in this list with native FreeAgent integration. Chaser, Kolleno, and Upflow do not support FreeAgent.
What's the cheapest AR automation software for UK SMEs? Equisettle starts at £49/month — the lowest published price in this category for UK businesses. Chaser's entry plan starts at £199/month.
Does accounts receivable software actually reduce DSO? Yes, when implemented correctly. Chaser cites 75% DSO reduction for users; Equisettle cites 40% faster cash recovery. The key driver is consistency of outreach — automation sends reminders every time, on schedule, without human oversight gaps.
Which AR software uses AI best? Equisettle uses predictive ML to identify at-risk invoices 14 weeks ahead. Kolleno uses AI for context-sensitive workflow decisions. Upflow uses AI for Promise-to-Pay signal extraction. All three are genuine AI applications — Equisettle's is the most forward-looking at the SME level.
This comparison is published by Equisettle Ltd. We are one of the products reviewed. All competitor information is sourced from public websites, G2, Capterra, and GetApp as of April 2026. We aim to present all tools fairly and accurately — if you spot an error, please contact us.
