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E-Commerce · head to head

FastSpring vs Mercari

FastSpring logo

FastSpring

E-Commerce

Merchant-of-record commerce platform for global payments, subscriptions, and tax compliance

From
On request
Rated
-
Full reviewWebsite
Mercari logo

Mercari

E-Commerce

Japan-founded peer-to-peer resale marketplace with a flat seller commission

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Mercari has a free tier, so it costs nothing to try first.
  • Each has a real cost: FastSpring pricing is not published and requires contacting sales for a quote, making cost comparison difficult upfront.; Mercari the flat 10 percent commission plus payment processing fees applies even to very low-value items, so selling something for a few dollars can leave the seller with proportionally little after fees and packaging.
  • They diverge on capability: FastSpring covers Global online payments, Mercari covers Flat seller commission.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which FastSpring and Mercari actually diverge.

Attributes where FastSpring and Mercari differ
AttributeFastSpringMercari
Starting priceOn requestFree
Pricing modeltransactionFree to list; 10 percent seller commission on sale price plus payment processing fee
Free tierNoYes
Platformsweb, apiiOS, Android, Web
Founded2006Unknown

Identical on both: user rating (Not yet rated), category (E-Commerce).

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 FastSpring

  • Global online payments
  • Subscription billing
  • Branded checkout
  • Tax compliance
  • Fraud prevention
  • Digital invoicing and quotes

Only in Mercari

  • Flat seller commission
  • Prepaid shipping labels
  • Local pickup and offers
  • Smart pricing and price drops
  • Mercari authenticity guarantee
  • Instant or standard payout

What people use each for

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

FastSpring

  • Selling software or SaaS internationally without a local tax entitynot Mercari
  • B2B invoicing and custom quotes for enterprise SaaS dealsnot Mercari
  • Recurring subscription billing for digital productsnot Mercari
  • Reducing fraud and chargebacks on digital purchasesnot Mercari

Mercari

  • Someone clearing out a wide mix of household items, not just clothing, in one listing appnot FastSpring
  • A casual seller who wants a flat, predictable commission rather than a tiered fee structurenot FastSpring
  • A buyer looking for secondhand electronics or general goods alongside apparelnot FastSpring
  • A seller using local pickup to avoid shipping costs on bulky itemsnot FastSpring

Where each one falls short

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

FastSpring

  • Pricing is not published and requires contacting sales for a quote, making cost comparison difficult upfront.
  • As a merchant-of-record, FastSpring takes on more control of the checkout and payment relationship than a pure payment gateway like Stripe.
  • Revenue share pricing can become more expensive than flat per-transaction gateway fees at very high volumes.
  • Primarily targeted at software/digital goods sellers, so it is less suited to physical product e-commerce.

Mercari

  • The flat 10 percent commission plus payment processing fees applies even to very low-value items, so selling something for a few dollars can leave the seller with proportionally little after fees and packaging.
  • Shipping is the seller's responsibility to arrange and package correctly, and disputes over item condition or damage in transit are common friction points in buyer-seller resolution.
  • Instant payout carries its own fee on top of the selling and processing fees already deducted, so getting money out quickly costs more than waiting for standard transfer.
  • Buyer protection and authenticity verification are limited outside the specific luxury authentication programme, so counterfeit risk on unverified categories rests largely on buyer judgement of listing photos and seller ratings.
  • Market depth and typical sale prices vary significantly between the Japan and US versions of the app, and the two operate as largely separate marketplaces despite the shared brand.

Pricing, plan by plan

FastSpring

On request
  • Custom$undefined/mo
    • All-in-one transaction-based pricing based on sales volume
    • No subscription fees or per-feature charges
    • Discounted rates for ACH and wire transfers

Mercari

Free
  • SellingFree
    • 10 percent selling fee on final sale price
    • Separate payment processing fee, roughly 2.9 percent plus a fixed amount
    • Instant payout carries an additional fee versus standard bank transfer

Which should you pick?

Choose FastSpring if

  • You need global online payments.
  • You work on web, api.
  • You also want subscription billing.
FastSpring review

Choose Mercari if

  • You need flat seller commission.
  • You want to start without paying.
  • You work on iOS, Android, Web.
  • You also want prepaid shipping labels.
Mercari review

Questions people ask

Is FastSpring or Mercari better?
Neither clearly leads. FastSpring starts at On request and Mercari at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, FastSpring or Mercari?
Mercari has a free tier; the other does not. Paid plans start at On request for FastSpring and Free for Mercari.
Does FastSpring or Mercari run on more platforms?
FastSpring runs on web, api. Mercari runs on iOS, Android, Web.
Can I use Mercari for free?
Yes. Mercari has a free tier, so you can try it without paying. FastSpring starts at On request.
What is FastSpring best used for?
FastSpring is most often used for selling software or saas internationally without a local tax entity, b2b invoicing and custom quotes for enterprise saas deals, recurring subscription billing for digital products, reducing fraud and chargebacks on digital purchases. Of those, selling software or saas internationally without a local tax entity and b2b invoicing and custom quotes for enterprise saas deals are not what Mercari is typically brought in for.
What can FastSpring do that Mercari cannot?
FastSpring covers Global online payments, Subscription billing, Branded checkout, Tax compliance. Mercari covers Flat seller commission, Prepaid shipping labels, Local pickup and offers, Smart pricing and price drops.

Answered from the vendors’ own pages

FastSpring: What does FastSpring cost?

FastSpring uses flat-rate, all-in-one pricing based on transaction volume, with fees withheld from payouts. There is no minimum volume or subscription fee, and pricing is typically quoted based on expected sales volume after contacting their sales team.

Source
Mercari: How much does Mercari charge sellers?

A flat 10 percent selling fee on the final sale price in the US, plus a separate payment processing fee, both deducted from the seller payout.

FastSpring: Is there a free plan?

FastSpring does not offer a free plan; instead pricing is transaction-based with no upfront subscription cost, and merchants only pay a commission on completed sales.

Source
Mercari: Does the buyer pay any extra platform fee?

No separate platform fee is added at buyer checkout the way Vinted adds a buyer protection fee; the buyer pays the listed price plus shipping if not included.

FastSpring: What does FastSpring integrate with or include compared to a payment gateway like Stripe?

FastSpring bundles international payments, subscription management, tax compliance, fraud prevention, reporting, and B2B invoicing into one price, whereas gateways like Stripe charge separately for many of these features.

Source
Mercari: Is Mercari the same marketplace in Japan and the US?

No, they operate as separate marketplaces under the same brand, with different inventory, pricing and fee history.

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