The Phone Call Gap: What AR Software Gets Wrong

Open any accounts receivable software product page in 2026 and you will see the same promises: automated workflows, email reminders, aging dashboards, customer portals. Every platform has them. They are table stakes. But scroll through the feature lists of the ten most popular AR tools on the market and look for one thing: the ability to call your customers. It is not there.

The entire accounts receivable software category has a blind spot. It automates everything up to the point where automation actually matters most, and then it stops.

Email automation is solved. Collections are not.

A decade ago, sending automated payment reminders was a competitive advantage. Today, every AR platform does it. You configure a schedule, the tool fires off emails at day 3, day 7, day 14, day 30. Some platforms let you customize the tone at each stage. Some include SMS. A few offer customer-facing payment portals.

This is useful work. For customers who forgot an invoice or need a quick nudge, an automated reminder is all it takes. But the data tells a different story about the customers who actually drag your cash flow. Email collections achieve response rates between 15% and 25%. Phone calls generate 40% to 60%. For the invoices that matter most, email is half as effective as a conversation.

Every AR software vendor knows this. They just have not done anything about it.

What happens after the emails fail

Here is the scenario that plays out in thousands of businesses every week. The automated emails run their course. Day 3, day 7, day 14, day 21. Open rates sit between 20% and 40%. Most customers never see the reminder. Of those who do, many close the email and move on.

By day 30, your AR software has done everything it was designed to do. The dashboard shows the invoice in red. The aging report flags it. And your platform says, in effect: your turn.

So someone on your team picks up the phone. The office manager, the bookkeeper, the business owner. They call the customer, ask about the invoice, discover there is a dispute about a line item, negotiate a partial payment, and log a note somewhere. Or, more likely, they put it off until tomorrow because they have other work to do.

This is the gap. The most effective part of the collection process, the actual conversation, is the one part that accounts receivable software does not touch.

Why AR platforms avoid voice

The absence of phone calls from AR software is not an oversight. It is a structural problem.

Building email automation is relatively straightforward. You compose a template, set a trigger, and send. The technology stack is simple: an SMTP connection, a scheduling engine, some merge fields. Text-based AI adds another layer, but the fundamentals have not changed in 20 years.

Voice is a different problem entirely. A real-time phone conversation requires a pipeline of three AI systems running simultaneously: speech recognition converting audio to text, a language model interpreting intent and generating a response, and speech synthesis turning that response back into natural-sounding audio. The entire round trip needs to complete in under 500 milliseconds, because humans expect near-instant responses in conversation. Anything slower feels robotic.

Then there is the conversation itself. A collection call is not a script. The customer might say "I never got the invoice," or "there is a problem with the delivery," or "I can pay half now and half in two weeks." The system needs to handle all of those, in real time, while maintaining a professional tone calibrated to how overdue the invoice is.

Most AR platforms were built from the ground up around text. Their data models, their workflow engines, their user interfaces are all designed for email sequences and dashboard views. Adding voice is not a feature request. It is an architecture change. And most vendors have chosen not to make it.

The cost of the gap

The gap between what AR software automates and what actually collects the money creates a specific, measurable cost.

An entry-level AR clerk in the United States earns roughly $44,000 per year. That is the starting price for a human who can pick up the phone. On top of that, the AR software itself runs $45 to $150 per user per month for SMB-tier plans, with mid-market solutions reaching well into five figures annually.

So you are paying for software that handles the easy part (sending emails) and then paying again for a person to handle the hard part (making calls). The software covers about 40% of the collection workflow. Your team covers the other 60%, which is the 60% that actually resolves overdue invoices.

For an SMB with 5 to 15 employees, this math does not work. You do not have enough volume to justify a full-time AR clerk, but you have too many overdue invoices to ignore. The result is that the business owner or office manager spends hours every week doing collection work at the highest hourly rate in the company.

What a voice-first platform looks like

Dunwise was built around the phone call, not as an add-on to an email engine.

When an invoice crosses the due date threshold, the agent calls. Not a robocall, not a pre-recorded message. An actual two-way conversation that handles objections, identifies disputes, and captures specific payment commitments. If the customer says "I never received the invoice," the agent sends it via SMS during the call. If the customer commits to paying by Thursday, that date is logged as structured data and an automatic follow-up is scheduled.

The tone adjusts automatically based on invoice aging: a friendly reminder at 7 days, a professional follow-up at 30, a direct conversation at 60. Every call produces actionable data, not just a contact attempt checkbox on a dashboard.

This is the part of accounts receivable software that has been missing. Not better dashboards, not smarter email templates. The ability to have the conversation that actually gets the invoice paid.

The market is catching up (slowly)

A handful of enterprise platforms have started experimenting with voice. Billtrust announced VoIP-based collection features in late 2025. But these are enterprise tools priced for large organizations with dedicated AR departments. For the SMB market, where the pain is sharpest and the resources are thinnest, the gap remains wide open.

The Kolleno alternative comparison illustrates this well. Every competing platform lists the same capabilities: email workflows, payment portals, aging reports. The differentiators are in the margins: a slightly better UI, one more integration, a different pricing model. None of them address the fundamental problem. When emails fail, your team is still on its own.

Key takeaways

• Every major AR platform automates emails. Virtually none of them automate the phone call that follows when emails fail.
• Email collection response rates (15-25%) are roughly half of phone call response rates (40-60%). The more effective channel is the one no software covers.
• Voice AI requires real-time speech processing under 500ms, a fundamentally harder problem than sending templated emails. Most platforms were not built for it.
• SMBs end up paying for AR software and paying for manual follow-up. The software handles the easy 40%. Humans handle the hard 60%.
• A voice-first approach closes the gap by automating the conversation, not just the reminder.

Ready to hear how it works? Try the Dunwise demo and experience an AI collection call for yourself.