Let's get you
Airtight.
Bella — your always-on accountant, living inside Airtight — closes your books while you sleep, chases your invoices so you don't have to, and drops a cryptographic receipt behind every move. Ask her anything, in plain English or Arabic. She'll just do it.
Three signatures on every move. Sealed tight by dawn.
Bella is tightening up 47 transactions across 4 bank feeds while Sara sleeps.
The people who keep the books honest.
One platform. Four audiences. One cryptographic ledger underneath all of them. Pick the door that looks like you — or skim all four.
Invoicing, BAS/VAT, SMSF, Sharia. Bella does the accountant's job for one person — no more late-night receipt shuffling.
Payroll, inventory, multi-currency, e-invoicing, R&DTI, projects. Books that scale without a second bookkeeper.
Everything Xero Practice Manager does. Sealed three ways, Bella-run, natively bilingual, one database under every client.
Fund accounting, AFSL, unfalsifiable books for LPs and auditors. Every dollar, provably.
Accounting software wasn't
built for the AI age.
QuickBooks is forty. Xero bolted AI onto a fifteenth-century ledger. Not one of them has cryptographic proof of a single transaction. We started from the opposite end — what does accounting look like when the ledger itself is the evidence?
See the architectureBuilt for Windows 3.1. Ported to the web. AI added as an afterthought. No cryptographic integrity, no immutable audit trail.
A cloud-native double-entry ledger. Beautiful UI. The architecture is unchanged since 1494. Bolt-on AI can't fix structural limits.
Australian-first, Windows-era desktop DNA. AI is a sidecar, not a spine. Compliance modules are tacked on, not integrated.
Not accounting with AI.
AI-native accounting.
Four architectural pillars no legacy platform has — or can easily retrofit.
Triple-entry cryptographic ledger
Every transaction is debited, credited, and cryptographically proven. Ed25519-signed, SHA-256 hash-chained, Merkle-anchored. The third entry isn't metadata — it's the proof nobody can argue with.
Ed25519 · SHA-256 · MerkleBella, your always-on accountant
Reconciles 24/7, drafts returns, chases clients, flags anomalies in plain English or Arabic. Every action leaves a receipt. Pause her any time — "take the wheel".
Autonomous · Guarded · OffPer-tenant envelope encryption
Four-layer key hierarchy: CMK → KEK → DEK → field. Every organisation gets its own key. Cryptographic shredding on deletion — unrecoverable, not merely "gone".
CMK → KEK → DEK → field20 specialist modules, one ledger
SMSF, R&DTI, Trust, Payroll (STP 2), Sharia AAOIFI, Auditor Portal, AFSL, Fund Accounting, ZATCA / FTA / NBR / OTA e-invoicing. All integrated — no bolt-ons, no second login.
20 modules · AU-native · MENA-readyConnect. Ask. She runs the tight stuff.
Connect your stack, upload your evidence
Xero, QuickBooks, 135+ AU banks, GCC banks, Stripe, Tabby, Shopify. Drop in R&D evidence (timesheets, lab notes, supplier invoices). Bella pulls the feeds and starts reading.
Airtight prepares the claim
AI-assisted classification of eligible expenditure, evidence linkage, and a draft AusIndustry registration plus R&D Schedule. Suggestions — not decisions. You stay in control.
Your tax agent reviews and lodges
Bring your registered tax agent into Airtight to review, sign-off, and lodge through their own ATO Online Services. Don't have one? We'll introduce you to a partner practice — no fee to you, no fee to them.
AI prepares.
Your tax agent approves.
You decide.
Airtight is preparation software. Every R&DTI claim is reviewed and lodged by a registered Australian tax agent under their own Tax Practitioners Board registration — not by us, and not by an algorithm.
Airtight is not a registered tax agent and does not provide tax, legal or financial advice.
You already have a registered tax agent. Invite them in.
Your agent gets a free seat inside Airtight. They review the prepared claim, sign off, and lodge through their own ATO Online Services. You stay the claimant; they stay the agent.
Matched with a partner practice — at no extra cost.
We connect you with a registered tax agent from the Airtight Accounting Practice panel. Airtight does not receive any fee from your tax agent for this introduction. Your agent's engagement and fees are independent of Airtight.
Everything accountants
quietly charge you for.
No add-on store. No "enterprise" wall. Every specialist module is wired into the same cryptographic ledger — one schema, one login, one source of truth.
- Chart of accounts
- Journals
- Bank feeds (135+)
- Reconciliation
- FX (25 currencies)
- Multi-entity consolidation
- Quotes
- Invoices
- Recurring
- Credit notes
- Statements
- Payment links
- BAS / GST / VAT
- STP 2 Payroll
- TPAR
- R&DTI
- ZATCA / FTA / NBR / OTA e-invoicing
- Sharia AAOIFI reporting
- SMSF
- Trust (8 AU states)
- Fund accounting
- AFSL
- Property / leases (AASB 16)
- Inventory & landed cost
- Anomaly detection
- Cash-flow forecasting
- Categorisation (live)
- Chasing on autopilot
- Month-end drafting
- Auditor Q&A
Airtight vs the ledgers
that started in the 90s.
Every honest head-to-head. No asterisks. You can switch any time — Bella imports ten years of history and rebuilds the chain of custody for you.
People who've put
Bella to work.
Bella closed the month before I'd finished my coffee. I signed three returns and went back to bed.
Our ZATCA compliance used to eat a person full-time. Now it's a screen we glance at.
I run 140 client books out of one login. The receipt trail means my PI insurer drops my rate next renewal.
Pricing you can actually read.
Four tiers. No per-seat multiplier. No "call us". Switch plans any day; we pro-rate.
Sole trader or single-entity SME.
- 1 entity
- Bella reconciliation
- BAS/GST/VAT lodgement
- Cryptographic receipts
Multi-entity, payroll, e-invoicing.
- Up to 5 entities
- Payroll (STP 2)
- GCC e-invoicing (ZATCA / FTA / NBR / OTA)
- Multi-currency (25)
Firms, funds, trusts, R&DTI, SMSF.
- Unlimited entities
- SMSF + Trust + Fund accounting
- R&DTI + AFSL
- Practice-manager tools
10+ entities, custom SLAs, onboarding.
- 10+ entities
- Custom SLAs
- Dedicated onboarding
- Priority support
Close your books
before the coffee's cold.
Bella runs in the background. You review receipts. Three signatures, one pass, every night.
Those who know, know.