Features
Everything Vowline does to get your invoices paid
Vowline drafts a WhatsApp reminder for every overdue invoice, helps you review and send them in minutes, reads the replies, and protects your business number along the way.
Reminders written for each customer
Vowline drafts a WhatsApp reminder for every invoice that's due one, in a tone that fits the relationship.
- AI-drafted personal note
- Each reminder carries a short note written by AI (Anthropic's Claude) from your notes on the customer, their payment history and earlier messages about the invoice.
- Three escalation stages
- A friendly nudge, then a direct request for a payment date, then a firm final reminder. Thresholds default to 3, 14 and 30 days overdue, and you can change them.
- Per-customer limits
- Cap how far each customer escalates, so a key account never gets past a friendly reminder.
- Red lines the AI never crosses
- No legal threats, no contacting someone's boss, no aggressive language, plus any rule you add in your own words.
- Redraft or edit anytime
- Change the note directly in the message, or ask for a fresh draft with one tap.
A two-minute morning review
Reminders are drafted at 12am and waiting for you by morning, on your phone or computer.
- See exactly what's sent
- Each card shows the full message as your customer will see it, with the personal note highlighted for editing.
- Tick and send together
- Tick the reminders you've reviewed and press Send all. You confirm the list before anything goes out.
- Skip today
- Hold a reminder back for a day without losing it.
- Morning summary email
- At 8:30am, a short email with how many reminders are ready and who replied overnight. It never includes names or amounts.
Replies handled for you
When a customer answers, Vowline reads the reply and adjusts chasing automatically.
- Promises to pay
- Chasing pauses until the promised date, then resumes if the invoice is still unpaid.
- Disputes
- Chasing stops for that invoice so you can sort it out personally.
- "Already paid"
- Flagged for you to check and mark paid, so nothing is closed by mistake.
- Chats
- Every conversation in one place. Reply directly to customers from Vowline.
Autopilot, with guard rails
For customers you trust, the first friendly reminder can go out on its own.
- Per customer, opt in
- Off by default. Turn it on only where you're comfortable.
- First reminder only
- Firmer reminders always wait for your review.
- Sent at 8:30am
- Drafted overnight, sent in the morning, never in the middle of the night.
- Held back when needed
- Paused automatically for new connections and if your number's quality drops.
Built on the official WhatsApp Business Platform
Reminders come from your business, through Meta's official platform, with formats Meta has approved.
- Use your existing number
- Connect the WhatsApp Business number your customers already know and keep using the app as normal.
- Or a dedicated number
- Prefer to keep reminders separate? Connect a new number used only for Vowline.
- Number health checks
- Connection, templates and quality rating are checked every morning, with plain-language warnings if anything changes.
- Gentle start
- New connections send up to 20 reminders a day for the first 7 days to build standing with WhatsApp.
Customers and invoices
Everything Vowline needs, without connecting your accounting software.
- Spreadsheet import
- Paste from Excel or upload a CSV. Customers are matched or created, with a preview before anything is saved.
- Customer notes
- Write how each customer should be treated. Notes are followed in every draft.
- Payment history
- How often each customer pays late, and by how much, is worked out for you.
- Next chase at a glance
- See when each customer is next due a reminder, or that they've promised a date.
- Partial payments
- Record part-payments and reminders mention only what's still owed.
Your rules
Set how chasing works once, and Vowline follows it every day.
- Escalation timing
- Choose how many days overdue each stage starts.
- Gap between reminders
- At least 7 days between reminders for the same invoice by default.
- Weekends
- No weekend reminders unless you switch them on.
Privacy and security
Your customers' details stay protected.
- Hosted in Singapore
- Data is stored in Singapore, and each account is isolated at the database level.
- No training on your data
- Drafting uses Anthropic's Claude, which doesn't train on your data by default.
- Private emails
- Summary emails contain counts only, never customer names or amounts.
Want the day-by-day picture? Read how Vowline works, or our guide to sending payment reminders on WhatsApp.
Stop dreading the follow‑up.
See Vowline with your own invoices. We'll set it up with you.
Request a demo