Softwr

Accounting · head to head

Medius vs Mercury

Medius logo

Medius

Accounting

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

From
On request
Rated
-
Full reviewWebsite
Mercury logo

Mercury

Accounting

Banking for startups

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Mercury has a free tier, so it costs nothing to try first.
  • 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.; Mercury treasury access requires a $250,000 balance held with Mercury
  • They diverge on capability: Medius covers Invoice capture and coding, Mercury covers Business checking.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Medius and Mercury actually diverge.

Attributes where Medius and Mercury differ
AttributeMediusMercury
Starting priceOn requestFree
Pricing modelquotefreemium
Free tierNoYes
FoundedUnknown2019

Identical on both: platforms (Web, iOS, Android), 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 Medius

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

Only in Mercury

  • Business checking
  • Savings accounts
  • Virtual cards
  • Team management
  • API access
  • QuickBooks
  • Xero
  • Stripe

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 Mercury
  • A group with several legal entities on different ERPs that wants one AP process across all of themnot Mercury
  • Reducing invoice fraud exposure with automated detection of supplier bank detail changesnot Mercury
  • Replacing a scanning bureau and a shared AP inbox with automated capture and exception-based reviewnot Mercury

Mercury

  • Business banking and payments for startupsnot Medius
  • Managing treasury, invoicing and corporate cards from one accountnot 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.

Mercury

  • Treasury access requires a $250,000 balance held with Mercury
  • Non USD international wires carry a 1% conversion fee
  • Choosing OUR wire coding, which covers intermediary bank charges, costs $15 per wire
  • ACH invoicing is $1 per transaction on Mercury Plus and only free on the $299 a month Pro plan
  • Advanced and recurring invoicing require Mercury Plus at $29.90 a month

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

Mercury

Free
  • Mercury (Free)Free
    • ACH payments
    • Domestic wires
    • Real-time payments
  • Mercury Plus$29.9/month
    • Invoice ACH debits
    • Recurring invoices
    • Invoicing API (500/month)
  • Mercury Pro$299/month
    • All Plus features
    • Relationship manager
    • Free ACH invoice debits

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 Mercury if

  • You need business checking.
  • You want to start without paying.
  • You work on Web, Ios, Android.
  • You also want savings accounts.
Mercury review

Questions people ask

Is Medius or Mercury better?
Neither clearly leads. Medius starts at On request and Mercury at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Medius or Mercury?
Mercury has a free tier; the other does not. Paid plans start at On request for Medius and Free for Mercury.
Does Medius or Mercury run on more platforms?
Medius runs on Web, iOS, Android. Mercury runs on Web, Ios, Android.
Can I use Mercury for free?
Yes. Mercury has a free tier, so you can try it without paying. Medius starts at On request.
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 Mercury is typically brought in for.
What can Medius do that Mercury cannot?
Medius covers Invoice capture and coding, Matching and exception handling, Fraud and anomaly detection, Supplier payments. Mercury covers Business checking, Savings accounts, Virtual cards, Team management.

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.

Mercury: Is Mercury business banking free?

Mercury's base banking tier is free and includes ACH payments, domestic wire transfers, real-time payments, Bill Pay, and QuickBooks/Xero automations at no monthly cost.

Source
Medius: Who owns Medius?

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

Mercury: What does Mercury Plus add beyond the free tier?

Mercury Plus costs $29.90 per month and adds invoice ACH debits, recurring invoice capabilities, invoicing API with 500 calls per month, unlimited 1099 filings, and access to partner benefits.

Source
Medius: How is it priced?

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

Mercury: Does Mercury charge monthly account fees?

No, Mercury states there are no minimum account balance requirements, overdraft fees, required monthly fees, or account opening fees. The free tier includes essential business banking, with paid tiers available for additional features.

Source
Medius: Does it replace our ERP?

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

Share

Related pages

More on Medius

More on Mercury

Keep looking

Other head to heads