Private Alpha · Now Open

Your client owes you money.
You haven't followed up yet.

Invoice Sentinel sends smart, human sounding follow ups that get you paid without damaging client relationships. It learns each client's behavior and adapts automatically.

Start Recovering Free → View Architecture

SOC-2 Compliant No Credit Card Setup in 10 min

Command Center Autopilot

QBO Synced v2.4.1

Recovered $485k

Active 128

Collection 96.5%

Avg Time 8.3d

Autopilot Feed

11:42// init memory graph... OK

11:42// scanning ledger sync... 12 overdue

11:43// drafting nudge #847... sent

11:43// tone: warm, escalation: 2/5

11:44// INV-2026-041 payment detected

11:44// closing INV-2026-041... cleared

11:45// dispute signal on INV-2026-018

11:45// pausing sequence... manual review

Active Invoices

Client	Amount	Status
Apex Studios	$14,200	Cleared
Bolt Creative	$8,750	Chasing
Cipher Labs	$22,400	Grace
Delta Agency	$5,100	Cleared
Echo Digital	$31,000	Overdue
Forge Media	$12,800	Chasing

Autopilot Active

96.5% Collection Rate

$485,210 Recovered

99%

Recovery Rate

8.3d

Average Time

847+

Invoices Cleared

Saved per Week

the real cost of late payments

You are losing more than money.

Every awkward follow up call, every template email, and every ignored message slowly destroys your confidence and your client relationships.

Five plus hours a week, wasted

Agency owners and ops teams spend an average of 5 hours per week manually chasing late payments. That is 260 hours a year not spent growing.

// estimated cost: $6,500/yr in lost billable time

The follow up feels terrible

Generic follow up emails feel robotic. They make you look desperate and put clients on the defensive, right when you need them most.

// risk: damaged relationships, lost referrals

Cash flow unpredictability

Late invoices mean you cannot hire, cannot invest, and cannot plan. The uncertainty is more damaging than the cash itself.

// 82% of small businesses fail due to cash flow issues

the recovery sequence

Four steps. Zero effort.

Connect your invoicing tool, set your tone, and let Sentinel handle every follow up intelligently.

Connect

Sync Xero, QuickBooks, or FreshBooks in one click. Sentinel imports all overdue invoices automatically.

Personalize

Tell the AI your preferred tone and any notes about a client. Sentinel handles the rest.

Activate

Autopilot turns on. Sentinel sends perfectly timed nudges that escalate intelligently over time.

Get Paid

Watch payments land. Every invoice closes. Your relationships stay intact. You do nothing.

the engine room

Sentinel Canvas

Every invoice moves through a deterministic lifecycle. No random reminders. No guesswork. Every state transition is intentional.

128 active

Issued

Invoice sent to client

→

94 tracked

Viewed

Email opened, read

→

41 flagged

Overdue

State transition fires

→

27 managed

Recovery

AI nudge sent

→

847 cleared

Paid

Relationship intact

why sentinel wins

The Unfair Advantage

Three proprietary layers that make Invoice Sentinel fundamentally different from any invoice chasing tool on the market.

Relationship Memory Graph

Neo4j maps every client interaction. The Sentinel knows who pays late but is sensitive to tone, and who just needs a gentle reminder. Context never gets lost.

Neo4j · Cypher

Deterministic State Machine

Every invoice follows a finite, predictable lifecycle. No random email blasts. The FSM decides the exact right moment to act, and why. Every transition is auditable.

Python · Transitions

Contextual AI Voice

GPT-4o drafts nudges that reference previous conversations and match your brand voice. No templates. No robotic repetition. Every message reads like it came from you.

GPT-4o · Webhooks

One Click Integrations

Connect Xero, QuickBooks, FreshBooks, and Stripe. Sentinel pulls invoices, syncs payment status, and marks invoices closed when payment lands.

Xero · QBO · Stripe

Recovery Analytics

See exactly which clients are at risk, how many nudges each invoice has received, and your total recovered amount in real time.

Dashboard · Export

Smart Escalation

Sentinel knows when to be warm and when to be firm. Tone escalates automatically, and pauses if a dispute is detected. You are always in control.

Autopilot · Manual override

the difference

Generic Chasers vs. Sentinel

Most invoice tools send the same robotic sequence to every client. Sentinel treats each relationship as unique.

Capability	Generic Chasers	Invoice Sentinel
Tone Adaptation	Same template every time	Adapts to client personality
Relationship Memory	No history awareness	Neo4j tracks every interaction
Timing Logic	Fixed intervals	State driven, behavior based
Client Trust Impact	Feels robotic, damages trust	Feels like a human assistant
State Transparency	Black box logic	Full audit log per invoice

what people are saying

Early Testers. Real Feedback.

Reactions from agency founders who have used the recovery engine.

★★★★★

"We were burning 5 plus hours a week manually chasing payments. Sentinel didn't just automate it, the tone is so human that our clients actually apologize for being late instead of getting defensive."

Sarah Chen

Founder, Digital Flow Agency

5h/week recovered

★★★★★

"The relationship memory is the killer feature. Most tools just blast emails. Sentinel knows when a client is sensitive and adjusts. It is like a senior AR specialist on autopilot."

Marcus Thorne

CEO, Thorne Creative

3x faster collections

★★★★★

"Paid in full within 48 hours. That is our new record. If you run a service based business, you need this yesterday. The automation is flawless."

Elena Rodriguez

Director, Growth Nexus

$41k recovered in 48h

investment

Simple, Transparent Pricing

Start free, cancel anytime. No credit card needed to explore.

Starter

For freelancers managing up to 50 active invoices.

$ 0 /forever

Free Plan

50 Active Invoices

Basic State Machine

Email Notifications

Single Integration

Get Started

Frequently Asked Questions

Will it damage my client relationships?›

No, this is the core design principle. Sentinel uses a Relationship Memory Graph to understand each client's communication style and adjusts the tone accordingly. Clients consistently report that follow ups feel human and considerate, not robotic.

How long does setup take?›

Most agencies are live within 10 minutes. Connect your accounting tool (Xero, QuickBooks, or FreshBooks), set your preferred tone, and Sentinel starts recovering immediately.

What if a client disputes an invoice?›

Sentinel automatically detects dispute signals in replies and pauses all follow ups for that invoice. You get notified immediately so you can handle it personally, without any accidental automations going out.

Can I see what is being sent before it goes out?›

Yes. The dashboard shows you every nudge in the queue, the AI drafted message, and the exact send time. You can edit, delay, or cancel any nudge with one click.

What accounting tools does it connect to?›

Currently, Xero, QuickBooks Online, FreshBooks, and Google Sheets for manual workflows. Stripe is in beta. More integrations are actively being built based on community requests.

Is this safe to use?›

Yes, Early Access means you are getting in before the public launch and pricing increases. The core recovery engine is fully functional and already being used by 42 plus agencies. You get direct access to the founding team for any issues.

Your client owes you money. You haven't followed up yet.

You are losing more than money.

Five plus hours a week, wasted

The follow up feels terrible

Cash flow unpredictability

Four steps. Zero effort.

Connect

Personalize

Activate

Get Paid

Sentinel Canvas

The Unfair Advantage

Relationship Memory Graph

Deterministic State Machine

Contextual AI Voice

One Click Integrations

Recovery Analytics

Smart Escalation

Generic Chasers vs. Sentinel

Early Testers. Real Feedback.

Simple, Transparent Pricing

Frequently Asked Questions

Stop Chasing.Start Recovering.

Your client owes you money.
You haven't followed up yet.

Stop Chasing.
Start Recovering.