Postlock vs Mayday

Different jobs, both worth knowing about.

Intercompany balance-sheet reconciliation for multi-entity Xero/QuickBooks groups. Here's exactly where Balancer and Postlock overlap - and where they don't.

Where Mayday is strong

AR/AP matching between related entities, automated cross-entity recharges and bank reconciliation - genuinely useful if you run a multi-entity group and need the entities to tie to each other.

Where Postlock is different

Balancer reconciles entities against each other. It doesn't snapshot a signed-off period and watch it for changes afterwards - that's a different problem, and the one Postlock solves.

Side by side

The feature matrix.

Feature Postlock Mayday
Post-lock change detection (auto watchdog) -
Real Excel export · working-paper quality -
Per-line institutional memory (carry-forward notes) -
Supporting schedules
Board-figure tracking -
Read-only Xero · no write access ?
Who-changed-it attribution ?
Audit trail + adjustment register -
Named-user roles + approval workflow ?
Practice multi-client view
Price (early access) from £39/mo Free · from £34/mo

"?" = not confirmed from public docs; check Mayday's current site before deciding.

Our honest take

What we are and aren't.

Where Postlock wins

Post-lock monitoring: we haven't found another tool that watches closed periods and names the document and person behind a change - check us on it in the table below. The Excel pack: the tools we've compared keep reconciliations in their own dashboards; Postlock exports a real file because auditors and accountants live in files, not dashboards.

Where others win

If you need multi-entity consolidation, driver-based forecasting, deep workflow, or client data-hygiene monitoring, look at ScaleXP, Numeric or Dext - they go further in those specific areas. Postlock is deliberate and narrow.

Why read-only matters here

We request only read-only Xero access - technically incapable of changing your ledger. If Postlock were ever compromised, an attacker could see but never touch your numbers. That's a trust decision we won't trade away.

No AI, on purpose

Every check here is deterministic and re-performable - the same inputs give the same answer, which is what audit evidence requires. Your ledger is never read by a model, and there's no metered AI cost under the price. If a tool's pitch leans on AI reading your transactions, ask two questions: what does it find that a written rule couldn't, and what happens to their costs when model pricing moves. Our full reasoning →

Check my closed months · free Talk to us

See how Postlock compares to the rest of the market on the full comparison hub.