The operating system
for how your business
runs money.
Invoices, payments, vendor intake and approvals, client and vendor intelligence, with AI workflows running on top. It's one operational layer your business runs on, instead of five separate tools you switch between all day.
Sign up free. See how the whole product connects.
One invoice. Live.
Invoice sent
Mon 2:15 PM
Acme Studios · $2,750
Client viewed
Mon 2:48 PM
Opened the invoice
Marked overdue
Day 14
12 days past due
Friendly nudge sent
Just now
Reminder stage in your follow-up plan
Cash Pulse updates
Live
Outstanding $2,750
One product, not a stack of tools
Tools handle one motion.
A product holds the shape underneath.
Invoicing tools own the sender side. Inboxes own the recipient side. Wrenbase holds both as the same shared object, reachable from every surface your business uses.
Multi-party
Sender, recipient, AI agent. One shared object.
The invoice exists once. The sender sees their POV, the recipient sees theirs. An AI agent acting on behalf of either is a first-class accountholder, not a bot wrapped in API calls.
Multi-channel
Dashboard, messaging, MCP, public links.
Act on a Wrenbase invoice from the dashboard, from email, from an MCP-connected AI tool, or from a public link. Same record, every surface.
Multi-shape
AR, AP, retainers, intake, channel revenue.
Project invoices, recurring retainers, vendor bills coming in, sales landing across channels. Different shapes of money work, one place.
One workflow, every product
One invoice. One product. Shared state.
Watch a single invoice move through Wrenbase. Every part of the workflow touches it, and it all stays on one ledger.
Invoice created
Acme Studios · $2,750. Sent by email.
Client viewed
Opened the invoice 33 minutes after send.
Reminder sent
Friendly nudge. Stage 2 of 7 in your follow-up plan.
Paid
$2,750 in by ACH, marked paid on the invoice.
Revenue updates
May revenue line up by $2,750. Aging bucket cleared.
Next invoice drafted
Recurring schedule fires the next cycle, queued for review.
Six steps. One product. One invoice. All of it on one ledger.
One ledger, many surfaces
Every workflow writes to
the same operational history.
Invoicing, Cash Pulse, Invoice Inbox, Intake, Agents. One product on one shared ledger. Because it's one system, there's nothing to reconcile.
The organizing layer
Every invoice, bill, and payment, organized by project.
The product is how money moves. Projects is where it lands. Tag a document once and it rolls into that engagement's P&L: quoted, billed, collected, spent, and what's still owed.
Margin per job. Receivables by age. The next six weeks of cash, per engagement. Know what each job actually made while it's still running, not at year-end.
Riverside Brand Shoot · Overview
on trackProfit margin
60%
Outstanding
$1,000
Budget
$14.6k left
Cash timeline, next 6 weeks
Weeks 1-2 run cash-negative before Acme's payment lands in week 3. Consider nudging invoice #4.
If your business runs on spreadsheets
The spreadsheet you've been editing forever has a successor.
Most of the businesses we talk to run their clients, vendors, invoices, and payments out of a spreadsheet. Wrenbase takes over the work behind that file. Invoices send themselves on a schedule, the status updates as money comes in, and late clients get followed up without you opening the laptop.
And if your data already lives in a spreadsheet, you bring it with you. Wrenbase imports clients, vendors, invoices, and transactions from CSV.
clients-2026-final.xlsx
Receivables
LiveOutstanding
$5,575
Overdue
$185
Paid · MTD
$4,950
Acme Studios
$2,750.00
Paid
Maple Tutoring
$2,200.00
Paid
Riverside Co
$1,400.00
Sent
GreenLeaf LLC
$185.00
Overdue
BellaVista
$3,100.00
Paid
NorthStar Inc
$890.00
Draft
What runs in the product
Capabilities you won't find together anywhere else.
Follow-up plan
Heads-up
Friendly nudge
Quick check-in
SendingPolite
Direct
Urgent
Final
Escalating follow-ups
Reminders that escalate with the tone you choose.
Heads-up, friendly nudge, quick check-in, polite, direct, urgent, final notice. Each stage uses a tone you choose. You see every message before send.
- 7 escalation stages
- Tone control per stage
- Approve before send
See how it works →
Invoice Me submissions
Screened[email protected]
PASS[email protected]
PASS[email protected]
BLOCKVendor intake
A public link that filters bad submissions before they reach you.
Share one Invoice Me link. Every submission is screened before it reaches you, with sanctions checks and your own rules built in, so most bots and bad actors are caught before they get in. Blocked ones stay out of your inbox.
- Structured submissions
- Screened at the door
- Audit log of rejections
See how it works →
Client · Acme Studios
Auto-trackedAcme Studios
Since Mar 2024 · 12 invoices
Total paid
$48,200
Avg days
4 days
Outstanding
$2,750
Derived from invoices and payments. No CRM logging required.
Client and vendor intelligence
Your contacts get smarter from the work itself.
Every invoice, payment, and submission updates the client or vendor record automatically. No CRM logging tax. Their behavior is the data.
- Auto-tracked from Invoice Me
- Per-client payment history
- Block, approve, monitor vendors
See how it works →
Agent rules · Revenue agent
Agent-native
AI agents that draft invoices, working inside the rules you set.
Spending caps, recipient whitelists, approval thresholds. The AI agent stops at the edge of every rule. Wrenbase logs every action in the same audit trail as your own.
- Spending caps + whitelists
- Approval thresholds
- Full audit trail
See how it works →
Workflows on Wrenbase
One product. Many workflow shapes.
Four common shapes most businesses recognize themselves in. Eight in the gallery, and many more fit the same primitives.
Freelancers
Project billingSend the invoice. Get paid. Move on.
You bill clients project by project. You want the invoice to take two minutes and the payment to land without a follow-up call.
Workflow
See the workflow →
Agencies
AR + APAR and AP in one place. Stop billing through three tools.
You run a small team billing multiple clients. You also pay subcontractors and vendors. You want the money in and the money out tracked in one system.
Workflow
See the workflow →
Local services
Recurring clientsRecurring monthly billing for the families and businesses you serve.
You teach, train, clean, or maintain on a recurring schedule. You have 30 to 200 clients paying you monthly. You want them paying online without you texting reminders every Friday.
Workflow
See the workflow →
Multi-channel businesses
Channel revenueYour money lands in five places. See it in one.
Etsy, Amazon, Acuity, Stripe, the occasional check. Each platform pays on its own schedule. Wrenbase imports every channel into one revenue view so you can see what you actually made.
Workflow
See the workflow →
Pricing
Start free. Pay when you need automation.
Every new workspace starts with the full product, no feature gates. See how the whole system connects, then pick the plan that fits how you operate.
Try Wrenbase
Free
Send your first invoice in seconds. Forever free.
Where most teams land
Growth
Understand and control your cash flow.
- Escalating follow-ups, tone-controlled per stage
- Client risk scoring and payment insights
- Vendor management and approval workflows
- AI agents for invoicing automation
- API and MCP access
For finance ops
Scale + Enterprise
Custom limits, advanced controls, ERP and SSO.
Common questions
Quick answers.
- What is Wrenbase?
- One operational layer for how a small business runs money. Invoicing, payments, vendor intake and approvals, and client and vendor intelligence sit on a single ledger, so you stop switching between five separate tools all day.
- Who is Wrenbase for?
- Service businesses that both send invoices and pay vendors: agencies, contractors and trades, consultants, freelancers, local services, and multi-channel sellers. If you invoice clients and get billed by suppliers, it's built for you.
- Is it really one product, not a bundle?
- Yes. Invoicing, Cash Pulse, Invoice Inbox, Intake, Screening, AI Agents, and Projects all write to the same ledger. Because it's one system, there's nothing to reconcile between separate tools.
- How do payments work?
- Card and ACH payments through Stripe are rolling out now. Today you can send invoices, track what's outstanding, and mark them paid by whatever method the money actually arrived, whether that's wire, check, ACH, or Zelle.
- Is there a free plan?
- Yes. The free plan covers invoicing, receiving bills, and the basics, and stays free. Paid plans add approvals, vendor management, AI agents, and finance controls.
- What are the AI agents?
- Optional helpers that work inside your rules. They can draft invoices, follow up on late ones, and screen incoming bills, each with spending caps and approval thresholds you set. Nothing goes out without staying inside the limits you define.
One system for how
your business gets paid.
Sign up free. See how the whole product connects. Your first invoice takes minutes.