Softwr

Accounting · head to head

Carta vs Medius

Carta logo

Carta

Accounting

Cap table, equity and 409A valuation software built around United States private company practice

From
$29/month
Rated
-
Full reviewWebsite
Medius logo

Medius

Accounting

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

From
On request
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Carta pricing scales with the number of stakeholders on the cap table, so a company that grants options broadly pays a rising annual fee for employees and small angels who sign in once a year, and the cost keeps climbing after the round that justified it is spent.; 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.
  • They diverge on capability: Carta covers Cap table of record, Medius covers Invoice capture and coding.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Carta and Medius actually diverge.

Attributes where Carta and Medius differ
AttributeCartaMedius
Starting price$29/monthOn request
Pricing modelsubscriptionquote
Founded2012Unknown

Identical on both: free tier (No), 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 Carta

  • Cap table of record
  • 409A valuations
  • Electronic issuance
  • Vesting and exercise
  • Employee portal
  • Scenario modelling
  • Waterfall analysis
  • ASC 718 expense reporting

Only in Medius

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

What people use each for

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

Carta

  • A startup that has just closed a priced round and whose investors and counsel expect the cap table to live somewhere they can read itnot Medius
  • A company issuing options to employees for the first time and needing a defensible 409A before it can set a strike pricenot Medius
  • A finance team preparing its first audit and needing ASC 718 stock compensation schedules that tie to the grant recordsnot Medius
  • A venture fund that wants LP reporting, capital calls and SPV administration handled outside a spreadsheetnot Medius

Medius

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

Where each one falls short

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

Carta

  • Pricing scales with the number of stakeholders on the cap table, so a company that grants options broadly pays a rising annual fee for employees and small angels who sign in once a year, and the cost keeps climbing after the round that justified it is spent.
  • The cap table is a legal record assembled from years of board consents, so migrating to another provider means re-entering historical transactions and having counsel confirm the rebuilt table matches the signed documents, which is why most companies stay whatever they think of the service.
  • The product is built around United States company law and tax practice, Delaware entities, 409A and ASC 718, so a company incorporated in the United Kingdom, Europe or elsewhere gets a record keeping tool while the valuation and compliance features that carry the price are of limited or no use.
  • 409A valuations are delivered on a cadence and require a refresh after each material event or every twelve months, so a company that raises or changes materially is repeatedly back in a valuation process with fees and turnaround time attached, and a late valuation blocks option issuance.
  • Carta drew sustained criticism in 2024 over how customer cap table data intersected with its secondary trading business, and although it exited that activity the episode is a live reason to check what a vendor holding your ownership record is permitted to do with it.

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.

Pricing, plan by plan

Carta

$29/month
  • LaunchFree
    • Cap table
    • Stakeholder management
  • Seed$360/year
    • 409A valuations
    • Option exercising
    • Scenarios

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

Which should you pick?

Choose Carta if

  • You need cap table of record.
  • You work on Web, Ios, Android.
  • You also want 409a valuations.
Carta review

Choose Medius if

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

Questions people ask

Is Carta or Medius better?
Neither clearly leads. Carta starts at $29/month and Medius at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Carta or Medius?
Carta starts at $29/month and Medius at On request.
Does Carta or Medius run on more platforms?
Carta runs on Web, Ios, Android. Medius runs on Web, iOS, Android.
What is Carta best used for?
Carta is most often used for a startup that has just closed a priced round and whose investors and counsel expect the cap table to live somewhere they can read it, a company issuing options to employees for the first time and needing a defensible 409a before it can set a strike price, a finance team preparing its first audit and needing asc 718 stock compensation schedules that tie to the grant records, a venture fund that wants lp reporting, capital calls and spv administration handled outside a spreadsheet. Of those, a startup that has just closed a priced round and whose investors and counsel expect the cap table to live somewhere they can read it and a company issuing options to employees for the first time and needing a defensible 409a before it can set a strike price are not what Medius is typically brought in for.
What can Carta do that Medius cannot?
Carta covers Cap table of record, 409A valuations, Electronic issuance, Vesting and exercise. Medius covers Invoice capture and coding, Matching and exception handling, Fraud and anomaly detection, Supplier payments.

Answered from the vendors’ own pages

Carta: Do I need Carta before I have employees with options?

No. Before options exist a spreadsheet reviewed by your lawyer is usually enough. The pressure to move normally comes at a priced round, or the first time you need a 409A to set a strike price.

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.

Carta: Is the 409A included in the subscription?

The subscription tiers bundle valuations differently and refreshes after material events can carry additional cost. Check what triggers a chargeable revaluation before you sign, because raising a round is exactly the moment you will need one.

Medius: Who owns Medius?

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

Carta: Can my accountant get the stock compensation numbers out of it?

Yes, it produces ASC 718 expense schedules and exports. If your accounts are prepared under a different framework, expect the schedules to be a starting point that your accountant reworks rather than something they post directly.

Medius: How is it priced?

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

Carta: Is it useful for a company outside the United States?

It can hold the share register and grants, and it does support some non United States structures. The 409A and United States tax workflow will not apply to you, so weigh it against local alternatives that understand your filings.

Medius: Does it replace our ERP?

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

Carta: How hard is it to leave?

Harder than the export button suggests. You can export the data, but the receiving system has to reproduce every historical grant, cancellation and transfer, and someone has to verify the result against the original signed consents.

Carta: Who normally pays for it, the company or the investors?

The company, even though investors and counsel are frequent users. That is the usual complaint about the pricing model: the party paying is not the only party benefiting.

Share

Related pages

More on Carta

More on Medius

Keep looking

Other head to heads