Apxium
Apxium is a SaaS and embedded-fintech platform that automates accounts receivable, payment processing, and lending for accounting and legal professional services firms across Australia, Canada, UK, and US, with 300+ firms and $5B in cumulative invoices processed.
- Company typePrivate
- Founded-
- HeadquartersAdelaide, Australia
- Headcount11–50
- GTM typeB2B
- OfferingSoftware
What Apxium does
Apxium (legally Onebox Professional Pty Limited, originally branded Onebox Professional) is an Australian-headquartered SaaS and fintech company that automates accounts receivable workflows for accounting and legal professional services firms. Founded in 2017 and based in Adelaide (Lot Fourteen / Stone & Chalk fintech hub), the company has expanded to operate regional offices in Vancouver, Seattle, and London, serving 300+ firms across Australia, Canada, the UK, and the US. The platform's core product, Apxium Collect, integrates natively with the dominant practice management and accounting systems in each market — Xero, CCH ProSystem fx, MYOB AE/AO, Star Practice Management, Reckon, Greatsoft, IRIS, WorkflowMax, and HandiSoft — and automates the full invoice-to-receipt lifecycle, including electronic invoicing, automated reminders (email and SMS), PCI-compliant payment gateway processing (credit card, EFT, direct debit), electronic engagement signing, virtual point-of-sale, and real-time reconciliation write-back.
The product portfolio extends beyond AR automation. Apxium AuditSafe (TaxSafe in the UK) provides automated compliance and audit insurance renewal processing. Partepay Plus and Partepay Proposal (priced at $9.90 and $22/month respectively) target the SMB segment as a standalone or Xero-integrated AR solution. In November 2024, Apxium launched APX Capital as its embedded lending arm, introducing Tax Pay (unsecured tax obligation lending) and WOBL (Whole Of Book Ledger growth capital), with Professional Fee Funding paying firms 100% upfront while clients repay in 3-12 month instalments.
Apxium's revenue model combines recurring SaaS subscriptions ($200-$350/month tiers), per-transaction processing fees (credit cards at 1.65% + $0.28, bank debits at $0.77, SMS at $0.44), and interest income from embedded lending products. The company has reached $5B in cumulative invoices processed and $1B+ in cumulative payments processed with 60% year-over-year growth in new merchant acquisition during 2025, supported by an 11-50 employee team and a sales-led direct go-to-market motion anchored on enterprise accounting firms (Baker Tilly WM LLP, Eide Bailly LLP, HW LLP, Bongiorno Group, Pitcher Partners, PKF, Grassi, Prager Metis).
Apxium firmographics
Firmographics- Name
- Apxium
- Legal name
- Onebox Professional Pty Limited
- Website
- https://apxium.com
- Company type
- Private
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Apxium is a SaaS and embedded-fintech platform that automates accounts receivable, payment processing, and lending for accounting and legal professional services firms across Australia, Canada, UK, and US, with 300+ firms and $5B in cumulative invoices processed.
- Ownership category
- akta.pro rank
Apxium industry classification
Industry- Product category
- Accounting Practice Management Software
- NAICS
- Financial Transactions Processing, Reserve, and Clearinghouse Activities (522320), Software Publishers (513210), Credit Intermediation and Related Activities (522), Activities Related to Credit Intermediation (5223), Sales Financing (52222)
- SIC
- Short-Term Business Credit Institutions (6153), Miscellaneous Business Credit Institution (6159)
- akta.pro primary industry
- Accounts Payable Automation & Supplier Payments (FSAGAJAD)
- akta.pro secondary industries
- Alternative Payment Methods (APMs) Enablement (BNPL, wallets, local methods) (FSAMACAE), Alternative Payment Method (APM) Acquiring (e.g., BNPL, wallets, local methods) (FSAMABAL), A2A Collections & Direct Account Funding (FSAMAFAH), Accounts Payable (Invoice Processing, 2/3-Way Match, Vendor Payments) (BPAAAGAA)
Keywords
Where Apxium is headquartered
LocationHeadquarters
- HQ city
- Adelaide
- HQ country
- Australia
- HQ region
- Oceania
Offices4 records
Markets served
Apxium business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Technology or R&D, Personnel, Infrastructure, Marketing or Sales, Operations
Revenue model
- Software Subscription (SaaS): Monthly subscription fees for access to Apxium Collect and Partepay platforms. Pricing tiers based on business size/turnover and deployment type (cloud vs server-based). Fees are charged regardless of transaction volume with additional per-transaction fees.
- Transaction Processing Fees: Per-transaction fees on credit card payments (1.65% + $0.28), bank debits ($0.77), and SMS reminders ($0.44). These fees are charged each time a payment is processed through the platform.
- Professional Fee Funding (PFF): Revenue generated from the financing component where Apxium Money pays firms 100% upfront and manages client instalment repayments. Interest income earned on the financed amounts over 3-12 month terms.
- APX Capital Lending Products: Tax Pay and WOBL (Whole of Book Ledger) funding products generate revenue through interest on unsecured lending facilities provided to accounting firms and their clients for tax obligations and growth capital.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Monthly | Apxium Collect Cloud - Up to $1.2M turnover |
| Subscription | Monthly | Apxium Collect Cloud - Canada |
| Subscription | Monthly | Apxium Collect Server-Based - Up to $1.8M turnover |
| Subscription | Monthly | Apxium Collect Server-Based - Canada |
| Subscription | Monthly | Partepay Plus |
| Subscription | Monthly | Partepay Proposal |
| Transaction based/ take rate | Pay-as-you-go | Transaction Fees - Canada |
| Other | Pay-as-you-go | Apxium Money (Professional Fee Funding) |
Go-to-market motion2 records
Distribution channels3 records
Marketing channels6 records
Apxium product offering
Product offeringCore offering
Apxium sells a cloud-based accounts receivable automation and payment processing SaaS platform purpose-built for accounting and legal firms. Its core product, Apxium Collect, automates the full invoice-to-reconciliation lifecycle with native integrations to leading practice management and accounting systems (Xero, CCH ProSystem fx, MYOB, Star PM, Reckon, Greatsoft, IRIS). Revenue is supplemented by the Partepay SMB-focused AR toolkit and the APX Capital lending arm offering Professional Fee Funding, Tax Pay, and WOBL financing.
Product overview
Apxium is a multi-product SaaS and fintech platform delivering accounts receivable automation, secure payment processing, and embedded financing solutions for accounting and legal firms. The platform operates across Australia, Canada, UK, and US markets. The core product is Apxium Collect (debtor management and payment gateway), complemented by compliance automation modules (Apxium AuditSafe/TaxSafe), and APX Capital (the financing arm offering Tax Pay, WOBL funding, and Professional Fee Funding). A separate SMB-focused product line is offered under the Partepay brand, which includes Partepay Plus and Partepay Proposal sub-products for small businesses requiring standalone or Xero-integrated accounts receivable automation.
Differentiator
Problem solved
Functional benefit
Brands
- Apxium Collect: Total debtor management and payment solution for accountants, providing integrated accounts receivable automation with multiple payment options.
- Apxium AuditSafe
- Apxium Money
- APX Capital
- Partepay
Products and services
- Apxium Collect Total debtor management and payment solution for accounting firms that automates the entire invoice lifecycle — invoicing, automated reminders, payment collection, and reconciliation — through native integrations with practice management and accounting systems (Xero, CCH ProSystem fx, MYOB AE/AO, Star PM, Reckon, Greatsoft, IRIS). Supports credit card, direct debit, EFT, and instalment payments.
- Apxium AuditSafe
Quantifiable outcome
- Collections increased 8-10% year-over-year
- +6 more outcomes
Companies that use Apxium
Customer profileNamed customers20 records
Segments4 records
Ideal customer profiles3 records
Apxium technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration13 records
Feature10 records
Apxium partnerships and signals
Strategic signalPartnerships
Nine partnerships are on record, tiered core and supporting.
- XerocoreNative integration partnership with Xero, the leading cloud accounting platform. Apxium synchronises invoices, payments, and debtor data bidirectionally with Xero, enabling automated receipting and reconciliation. Supports both cloud-based and standalone deployment for Xero users.
- CCH ProSystem fxcoreIntegration with Wolters Kluwer's CCH ProSystem fx practice management software, primarily used by US and Canadian accounting firms. Enables automated accounts receivable and payment gateway functionality within the CCH ecosystem.
- MYOB AE/AOcoreIntegration with MYOB AccountRight and MYOB AO (Accountants Office) practice management systems for Australian accounting firms, providing automated debtor management and payment processing.
- Star Practice ManagementcoreIntegration partnership with Star Practice Management software (US/Canadian market), enabling seamless payment processing and receivables management for CPA firms using Star.
- ReckonsupportingIntegration with Reckon desktop and cloud accounting software used by Australian accounting practices, providing automated accounts receivable functionality.
- GreatsoftsupportingIntegration with Greatsoft practice management system, expanding Apxium's reach in the UK and Australian legal/accounting markets.
- IRISsupportingIntegration with IRIS accounting software used by UK accounting practices, providing automated debtor management and payment processing capabilities.
- HandiSoft (Access Legal)supportingIntegration with Access Legal/HandiSoft legal practice management software, extending Apxium's reach into the legal sector.
- WorkflowMaxsupportingIntegration with WorkflowMax job management and invoicing software (now part of MYOB), enabling automated debtor management for practices using WorkflowMax.
Scale indicators7 records
Recent moves7 records
Expansion highlights6 records
Apxium competitors and assessment
Company assessmentMarket position
Competitive moat6 records
Key highlights7 records
Customer concentration
Apxium social profiles
Digital presenceApxium financial estimates
Financial estimateRevenue estimate
Valuation estimate
Apxium leadership team
Management profileNumber of profiles
Profiles1 record
Apxium subsidiaries and ownership
Company hierarchySubsidiaries1 record
Apxium funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Apxium M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Apxium
What does Apxium do?
Apxium sells a cloud-based accounts receivable automation and payment processing SaaS platform purpose-built for accounting and legal firms. Its core product, Apxium Collect, automates the full invoice-to-reconciliation lifecycle with native integrations to leading practice management and accounting systems (Xero, CCH ProSystem fx, MYOB, Star PM, Reckon, Greatsoft, IRIS). Revenue is supplemented by the Partepay SMB-focused AR toolkit and the APX Capital lending arm offering Professional Fee Funding, Tax Pay, and WOBL financing.
Is Apxium a public or private company?
Apxium is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Apxium founded?
Apxium was founded in -1. It employs 11 to 50 people.
Where is Apxium based?
Apxium is headquartered in Adelaide, Australia, in the Oceania region.
How does Apxium make money?
Four revenue lines are on record. Software Subscription (SaaS) is the primary driver. The others are transaction Processing Fees, professional Fee Funding (PFF) and APX Capital Lending Products.
Does Apxium have an API?
No public API is recorded for Apxium.
What industry is Apxium in?
Apxium's product category is Accounting Practice Management Software. Its primary akta.pro industry code is FSAGAJAD, Accounts Payable Automation & Supplier Payments, with a secondary code of FSAMACAE, Alternative Payment Methods (APMs) Enablement (BNPL, wallets, local methods). Its NAICS code is 522320 and its SIC code is 6153.