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Accounting · head to head

Medius vs Mollie

Medius logo

Medius

Accounting

Accounts payable automation and supplier payments for mid-market finance teams, Marlin Equity owned

From
On request
Rated
-
Full reviewWebsite
Mollie logo

Mollie

E-Commerce

European payment service provider with published per-transaction rates and no monthly fee on the online plan

From
£0.3/transaction
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Medius the sourcing, contract and procurement modules are considerably less developed than the AP core, so buying Medius as a full source-to-pay suite means accepting weak upstream tooling.; Mollie non-European cards cost 3.25% plus 20p against 1.20% plus 20p for UK domestic consumer cards, so a merchant with significant traffic from the US or Asia pays close to triple the domestic rate on that revenue.
  • They diverge on capability: Medius covers Invoice capture and coding, Mollie covers Local payment methods.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Medius and Mollie actually diverge.

Attributes where Medius and Mollie differ
AttributeMediusMollie
Starting priceOn request£0.3/transaction
Pricing modelquotePer transaction by payment method
PlatformsWeb, iOS, AndroidWeb, iOS, Android, API
CategoryAccountingE-Commerce

Identical on both: free tier (No), user rating (Not yet rated).

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 Medius

  • Invoice capture and coding
  • Matching and exception handling
  • Fraud and anomaly detection
  • Supplier payments
  • Approval workflow
  • ERP integration

Only in Mollie

  • Local payment methods
  • Published rate card
  • Hosted checkout and payment links
  • Subscriptions API
  • Point of sale terminals
  • Plugin ecosystem
  • Multicurrency settlement

What people use each for

The jobs each tool is most often brought in to do.

Medius

  • A mid-market finance team where most spend arrives as an invoice with no purchase order to match againstnot Mollie
  • A group with several legal entities on different ERPs that wants one AP process across all of themnot Mollie
  • Reducing invoice fraud exposure with automated detection of supplier bank detail changesnot Mollie
  • Replacing a scanning bureau and a shared AP inbox with automated capture and exception-based reviewnot Mollie

Mollie

  • A Dutch or Belgian shop where most customers pay by iDEAL or Bancontact and the flat 30p beats a percentage rate on high-value basketsnot Medius
  • A small merchant that wants published pricing rather than a sales call before it can model card costsnot Medius
  • A subscription business in the EEA collecting by SEPA Direct Debit mandate instead of cardnot Medius
  • A marketplace or platform that needs one integration covering the main European local methodsnot Medius

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Medius

  • The sourcing, contract and procurement modules are considerably less developed than the AP core, so buying Medius as a full source-to-pay suite means accepting weak upstream tooling.
  • Pricing is quote-only and driven by invoice volume, so a business with many low-value invoices pays disproportionately relative to the spend being controlled.
  • Payments are billed on transaction volume separately from the AP subscription, which is easy to omit from a cost comparison against a licence-only AP tool.
  • Private equity ownership since 2017 has produced an acquisition-driven product line, so payments and adjacent capability come from bought-in technology rather than the original platform.
  • ERP integration depth varies sharply by system, and organisations on less common or heavily customised ERPs face integration work that lengthens the implementation.

Mollie

  • Non-European cards cost 3.25% plus 20p against 1.20% plus 20p for UK domestic consumer cards, so a merchant with significant traffic from the US or Asia pays close to triple the domestic rate on that revenue.
  • Coverage is built around European methods, so if you expand into Latin America or Southeast Asia you will need a second processor and a second reconciliation process rather than extending Mollie.
  • The in-person Pro plan requires a one-year contract and charges 20 pounds a month per additional terminal, so a shop with four tills pays 80 pounds a month in terminal fees before any transaction cost.
  • Mollie offers no interchange-plus option publicly, so large merchants cannot see or benefit from falling interchange the way they could on a cost-plus contract with an acquirer.
  • The developer tooling and reporting are lighter than the largest processors, so finance teams that want detailed fee breakdowns or granular reconciliation exports often end up building that layer themselves.

Pricing, plan by plan

Medius

On request
  • Medius AP Automation$undefined/year
    • Two packaged AP automation tiers
    • Priced by invoice volume and entity count
    • Sourcing, contracts and procurement modules sold separately

Mollie

£0.3/transaction
  • Online paymentsFree
    • No monthly fee
    • UK domestic consumer cards 1.20% + 20p
    • European and commercial cards 2.90% + 20p
  • In person, pay as you goFree
    • No monthly commitment
    • Per-transaction terminal rates
    • One terminal
  • In person, Pro$20/month
    • Lower per-transaction terminal rates
    • One-year contract required
    • Each additional terminal 20 pounds per month

Which should you pick?

Choose Medius if

  • You need invoice capture and coding.
  • You work on Web, iOS, Android.
  • You also want matching and exception handling.
Medius review

Choose Mollie if

  • You need local payment methods.
  • You work on Web, iOS, Android, API.
  • You also want published rate card.
Mollie review

Questions people ask

Is Medius or Mollie better?
Neither clearly leads. Medius starts at On request and Mollie at £0.3/transaction, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Medius or Mollie?
Medius starts at On request and Mollie at £0.3/transaction.
Does Medius or Mollie run on more platforms?
Medius runs on Web, iOS, Android. Mollie runs on Web, iOS, Android, API.
What is Medius best used for?
Medius is most often used for a mid-market finance team where most spend arrives as an invoice with no purchase order to match against, a group with several legal entities on different erps that wants one ap process across all of them, reducing invoice fraud exposure with automated detection of supplier bank detail changes, replacing a scanning bureau and a shared ap inbox with automated capture and exception-based review. Of those, a mid-market finance team where most spend arrives as an invoice with no purchase order to match against and a group with several legal entities on different erps that wants one ap process across all of them are not what Mollie is typically brought in for.
What can Medius do that Mollie cannot?
Medius covers Invoice capture and coding, Matching and exception handling, Fraud and anomaly detection, Supplier payments. Mollie covers Local payment methods, Published rate card, Hosted checkout and payment links, Subscriptions API.

Answered from the vendors’ own pages

Medius: Is Medius a procurement suite or an AP tool?

Primarily an AP automation platform with procurement modules attached. If sourcing is your main requirement, look elsewhere.

Mollie: Does Mollie charge a monthly fee?

Not on the online payments plan. You pay only per successful transaction. In-person Pro is 20 pounds a month.

Medius: Who owns Medius?

Marlin Equity Partners, which acquired it in 2017 and has funded several bolt-on acquisitions since.

Mollie: Is iDEAL really a flat fee?

Yes, 30p per transaction regardless of the amount, which is why it is cheaper than cards on high-value baskets.

Medius: How is it priced?

By quote, driven by invoice volume and entity count, with payments billed separately on transaction volume.

Mollie: Can I use Mollie outside Europe?

You can accept non-European cards but at 3.25% plus 20p, and merchant accounts are aimed at European businesses. It is not a global processor.

Medius: Does it replace our ERP?

No. It sits alongside the ERP and posts approved invoices into it.

Mollie: Does Mollie do interchange plus?

Not publicly. The published rates are blended, so falling interchange does not flow through to you automatically.

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