Backfill
Beta — accepting founders

Autonomous bookkeeping · managed

Drop a bank CSV in.Walk out with a clean ledger.

Backfill reads a raw statement export — any bank, any processor — and turns it into a typed, direction-aware, running-balance ledger. The reconciliation, rules and follow-ups ship on top of this surface next.

Open the appSee how it works
4–6 hrs

back per month, per founder on average

96%

lines matched without a human touch

~5 min

to wire bank, Stripe and invoicing feeds

Today · ledger
5 transactions matched · 1 needs you
1 ping waiting
Stripe payout08:14+$12,408.22
Linear09:02−$48.00
WeWork — usage10:31−$612.40
Northwind Co.11:45+$4,250.00
Vercel13:08−$20.00
Quietly handled: 9 charges, 2 invoices, 1 payout · Awaiting you: 1 unusual charge

How it works

Four quiet stops, one dashboard you do not have to babysit.

No manual tagging, no “did this match?” review. Backfill works through a clear loop on your books and escalates the rare call that actually needs you.

01Plug in

Connect your money in five minutes

Drop in a CSV export from your bank, processor or card feed. Backfill parses the headers, normalizes dates and infers direction so the ledger is clean before you ever look at it.

Runs without a founder in the loop · paused at any time
Connected feeds
Chase Business
Bank
Live
Stripe
Processor
Live
Brex card
Card
Live
QuickBooks
Invoicing
Live
02Match & categorize

Audit-ready reasoning on every line

Every transaction gets matched against invoices, receipts and prior categories, with a short paper trail cited underneath. The agent explains itself like a senior bookkeeper would in a Slack thread.

Runs without a founder in the loop · paused at any time
Notion Labs — monthly sub
Matched to INV-4421 · 96% confidence
Software · deductible
Charge−$96.00
  • Vendor string matched “NOTION LABS”
  • Amount equals $96.00 on INV-4421
  • Past 7 charges from this vendor coded 6310
03Chase & remind

Polite, persistent overdue follow-ups

Backfill sends a reminder cadence that respects your client relationships — measured, never aggressive, on your tone of voice. It writes the email, schedules it, pulls the invoice and logs when it lands.

Runs without a founder in the loop · paused at any time
Follow-up thread · 4 d overdue
BackfillSent a friendly nudge to Northwind Co. — invoice INV-4478, $4,250.
Sent
Northwind Co.Acknowledged 2 d ago; promised payment by Friday.
Auto-logged
BackfillHolding the next nudge until Friday EOD to honor their word.
Scheduled
04Forecast

A cash view you can actually plan around

Ledger closes roll into a rolling 13-week cash view that respects your AR cadence, recurring bills and the one-off POs you flag. Hire someone, time a purchase, plan a quiet week — without a spreadsheet.

Runs without a founder in the loop · paused at any time
Next 13 weeks · cash on hand
Wk 1Wk 5Wk 9Wk 13
13-week cash view
Lowest point
$48.2k · Wk 4
Closing balance
$112.4k

Why Backfill

Built for the founder in between — not the tool stack at either end.

Built for the in-between

Outgrown spreadsheets. Not ready for a full-service firm.
Most founders hit a wall somewhere between a tangled Google Sheet and the moment their first quarterly close matters. Backfill slots in right there — full control, none of the overhead, no new hire. You keep the receipts and the final say; the agent does the late nights.
See how it fits

Escalations

Only pings you when it matters
A surprise $4,100 charge from a new vendor. A vendor disputing a delivered invoice. A contractor crossing the $600 IRS threshold. Everything else — the 96% confident matches, the obvious recurring bills — happens silently. You read a short brief, not a firehose.

Reads only

Read-only by design
Connect feeds in seconds. The agent synchronizes, categorizes, drafts. It never moves money and never authenticates against a money-moving surface on your behalf. If it ever moved money, the dashboard would say so — out loud.

Audit trail

Every entry has a paper trail
Tap any line. See the receipt, the invoice, the prior pattern, the rule the agent used. When your CPA reviews quarter-end, they get a back-up ledger, not a black box.

Founder time

A genuine hour back, weekly
Founders on Backfill report reclaiming four to six hours a month previously spent reconciling Stripe payouts, chasing invoices and categorizing lunch receipts. That time goes back into the product, the team and the customer.

Pricing

One tier. Honest. Managed.

Priced between free DIY tools and a traditional full-service firm — small enough a seed-stage founder can sign off in a moment, large enough that the agent works on the books full-time on your behalf.

Founders · managed
managed service
$349/ month
Continuous bookkeeping, overdue chasing, cash forecasting and human-on-call review. Cancel any time.
Up to $2.5M annual GTV · unlimited transactions
Bank + card + processor + invoicing feeds
Continuous reconciliation with audit trail
Polite, persistent AR follow-ups on your tone
Rolling 13-week cash forecast
Quarter-end handoff packet for your CPA
Human-on-call for the rare ambiguous call
Start with Backfill
Switching from another bookkeeper?
Send us your last close. We reconcile the first 60 days for free and give you the delta in a one-page brief before you commit.
Send us your close

FAQ

Questions founders ask before signing on.

Something missing? Email us at backfill-2@polsia.app.

Quietly gets to work in five minutes

Stop reconciling Stripe payouts on a Sunday night.

One email gets you a working session by tomorrow. Bring your weirdest month-end and we will show you what the agent does with it.

Email BackfillAsk a question