ForgeLine Systems

Get paid.
Keep the relationship.

The work is done. The invoice is out. The money isn't there. Knock Knock sends polite, persistent payment reminders via SMS โ€” in your voice, not a collections robot. It stops the moment they pay.

Get started $49/mo ยท Cancel anytime
๐Ÿšช Knock Knock
Your business number
You (owner)
Mike Johnson owes $450, roof repair, 2085551234
Knock Knock
๐Ÿ“… Invoice logged: Mike Johnson, $450 for roof repair. Starting reminders now.
โ€” Day 1 โ€”
Knock Knock โ†’ Mike
Hey Mike, this is Boise Pro Roofing. Just a friendly reminder โ€” there's a $450 balance for the roof repair last week. Easy to pay at boiseproroofing.com/pay, or reply and we can sort it out!
โ€” Day 5 โ€”
Mike
Sorry about that, sending it today
You (owner)
PAID 2085551234
Knock Knock
โœ… Marked paid: Mike Johnson โ€” $450. Invoice closed.
How it works

Log the invoice. We handle the rest.

๐Ÿ’ฐ

Log an invoice in seconds

Text your Knock Knock number: "Mike Johnson owes $450, roof repair, 2085551234." That's it. Knock Knock parses the name, amount, job, and customer phone instantly.

๐Ÿ“จ

Polite, persistent reminders

Day 1, day 5, day 14, day 30 โ€” each message escalating slightly in urgency but never aggressive. Claude writes them to sound like you, not a collections agency.

โœ…

Stop the moment they pay

Text "PAID 2085551234" and all reminders stop immediately. If they reply with a question or dispute, Claude handles it โ€” and alerts you if it needs your attention.

The invoice follow-up you've been putting off.

Written like you, not a robot

Claude writes every reminder fresh โ€” using the customer's name, the specific job, and the right tone for where they are in the sequence. Professional, human, effective.

Two-way conversation handling

When customers reply โ€” with excuses, hardship stories, or disputes โ€” Claude responds appropriately and escalates to you when needed. You stay out of it until it matters.

Simple commands

PAID to close an invoice. LIST to see what's open. That's it. No app to learn, no dashboard to log into. It all works via the SMS number you already have.

Escalating urgency โ€” never aggressive

Day 1 is friendly. Day 30 is firm. But Knock Knock never threatens, never mentions credit bureaus, never damages the relationship you worked to build.

Unlimited invoices

One flat price, no per-invoice fees. Whether you have 3 open invoices or 50, Knock Knock tracks them all without you chasing anyone manually.

Owner alert when it escalates

If a customer gets upset or mentions a dispute, you get an SMS alert with the full context. You step in exactly when you're needed โ€” not before.

Simple pricing

Stop leaving money on the table.

Knock Knock
$49
per month ยท cancel anytime
Start for $49/mo
โœ“ Unlimited invoices tracked
โœ“ AI-written payment reminders
โœ“ Day 1 / 5 / 14 / 30 sequence
โœ“ Two-way customer conversation
โœ“ Owner alerts when escalated
โœ“ Simple SMS commands (PAID, LIST)
โœ“ Dedicated Knock Knock number
No contracts. No setup fees. Works with any smartphone.