Accounting · head to head
Causal vs Medius Expense
Causal
Accounting
Formula-based financial planning and modelling, now sold as Lucanet xP&A
- From
- On request
- Rated
- -
Medius Expense
Accounting
Expense management, formerly Expensya, now the expense module of the Medius spend platform
- From
- On request
- Rated
- -
The short version
- Each has a real cost: Causal causal was acquired by Lucanet on 31 October 2024 and the independent brand has been retired in favour of Lucanet xP&A, so the roadmap, support and pricing you buy are Lucanet’s and not the ones the product built its reputation on.; Medius Expense the Expensya name is being retired, so contracts, logins and support articles change identity mid-relationship and internal documentation has to be rewritten.
- They diverge on capability: Causal covers Variable-based modelling, Medius Expense covers Receipt OCR.
- Prices and features above were last checked on 1 September 2026.
Where they differ
Only the attributes on which Causal and Medius Expense actually diverge.
| Attribute | Causal | Medius Expense |
|---|---|---|
| Platforms | Web | Web, iOS, Android |
Identical on both: starting price (On request), pricing model (quote), free tier (No), user rating (Not yet rated), category (Accounting).
What each one covers
Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.
Only in Causal
- Variable-based modelling
- Dimensional breakdowns
- Scenario and range inputs
- Actuals integration
- Interactive dashboards
- Version history
- Spreadsheet import
- Workforce and headcount planning
Only in Medius Expense
- Receipt OCR
- Mileage and per diem
- VAT recovery
- Card reconciliation
- Approval workflows
- AP suite integration
What people use each for
The jobs each tool is most often brought in to do.
Causal
- A finance team whose three-statement Excel model has become too fragile to change safely before every board meetingnot Medius Expense
- A company that needs to show a range of outcomes rather than a single forecast, with uncertainty modelled directly in the driversnot Medius Expense
- A budget owner outside finance who should adjust hiring or spend assumptions and see the effect without being given edit access to the master spreadsheetnot Medius Expense
- A group already running Lucanet for consolidation and reporting that wants planning on the same platform rather than a separate toolnot Medius Expense
Medius Expense
- A French or Spanish employer needing VAT-compliant receipt capture in local formats and languagesnot Causal
- A company already running Medius for supplier invoices that wants employee spend on the same platformnot Causal
- A finance team with heavy mileage claims needing statutory rates applied without spreadsheetsnot Causal
- A group consolidating several country expense tools into one European platformnot Causal
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Causal
- Causal was acquired by Lucanet on 31 October 2024 and the independent brand has been retired in favour of Lucanet xP&A, so the roadmap, support and pricing you buy are Lucanet’s and not the ones the product built its reputation on.
- Self-serve pricing is gone: the old causal.app pricing page now redirects to a Lucanet solution page, so what was a transparent product you could sign up for is an enterprise sales conversation with no published rate.
- The variable-based model is a genuine departure from spreadsheet thinking, so an accountant fluent in Excel must relearn how to express a model, and the team members who could previously all edit the forecast often cannot at first.
- Deep Excel compatibility is limited by design; complex existing workbooks with macros, circular references or heavy lookups do not import cleanly and have to be rebuilt, which turns a tool evaluation into a modelling project.
- Consolidation, statutory reporting and multi-entity currency handling are weaker than in dedicated corporate performance management suites, so a group with several legal entities usually needs Lucanet’s other modules alongside it, raising the real cost well past the planning tool alone.
Medius Expense
- The Expensya name is being retired, so contracts, logins and support articles change identity mid-relationship and internal documentation has to be rewritten.
- It is now a module inside an accounts payable suite, so expense-specific roadmap items compete with supplier invoice work for engineering time.
- Pricing is not published and is discounted against bundling with Medius AP, which makes standalone expense quotes less competitive than they look.
- Strength is concentrated in Europe and the Maghreb; North American and Asian tax and mileage handling are thinner than the European coverage.
- It does not issue cards, so real-time spend controls are absent and it relies on card feed reconciliation after the fact.
Pricing, plan by plan
Causal
On request- Lucanet xP&A (formerly Causal)$undefined/year
- Variable-based planning models with dimensions and scenarios
- Actuals integration from accounting, CRM and warehouse sources
- Interactive dashboards for non-finance stakeholders
Medius Expense
On request- Medius Expense$undefined/year
- Per-user subscription, quoted not published
- Tiering by feature set and entity count
- Implementation and OCR configuration fees
Which should you pick?
Choose Causal if
- You need variable-based modelling.
- You also want dimensional breakdowns.
Choose Medius Expense if
- You need receipt ocr.
- You work on Web, iOS, Android.
- You also want mileage and per diem.
Questions people ask
- Is Causal or Medius Expense better?
- Neither clearly leads. Causal starts at On request and Medius Expense at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Causal or Medius Expense?
- Causal starts at On request and Medius Expense at On request.
- Does Causal or Medius Expense run on more platforms?
- Causal runs on Web. Medius Expense runs on Web, iOS, Android.
- What is Causal best used for?
- Causal is most often used for a finance team whose three-statement excel model has become too fragile to change safely before every board meeting, a company that needs to show a range of outcomes rather than a single forecast, with uncertainty modelled directly in the drivers, a budget owner outside finance who should adjust hiring or spend assumptions and see the effect without being given edit access to the master spreadsheet, a group already running lucanet for consolidation and reporting that wants planning on the same platform rather than a separate tool. Of those, a finance team whose three-statement excel model has become too fragile to change safely before every board meeting and a company that needs to show a range of outcomes rather than a single forecast, with uncertainty modelled directly in the drivers are not what Medius Expense is typically brought in for.
- What can Causal do that Medius Expense cannot?
- Causal covers Variable-based modelling, Dimensional breakdowns, Scenario and range inputs, Actuals integration. Medius Expense covers Receipt OCR, Mileage and per diem, VAT recovery, Card reconciliation.
Answered from the vendors’ own pages
Causal: Does Causal still exist?
The product does, as Lucanet xP&A. The independent Causal brand and self-serve offering have been retired following the October 2024 acquisition.
Medius Expense: Is Expensya still available?
Under that name, no. The product continues as Medius Expense, with the branding cutover on 30 September 2026 and no change to features or data.
Causal: What does it cost now?
Nothing is published. The former pricing page redirects to Lucanet, and the product is quoted as part of the Lucanet CFO Solution Platform.
Medius Expense: Do I have to buy Medius AP as well?
No, but the commercial terms improve materially if you do, which is worth testing during negotiation.
Causal: Can I import my existing Excel model?
Simple workbooks import. Models with macros, circular references or heavy lookup chains have to be rebuilt around named variables, which is the real migration cost.
Medius Expense: Does it issue corporate cards?
No. It reconciles existing card feeds rather than issuing its own cards.
Causal: Is it a replacement for a consolidation tool?
No. It plans and forecasts. Statutory consolidation and multi-entity reporting sit in Lucanet’s other modules.
Related pages
More on Medius Expense
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