Softwr

E-Commerce · head to head

FullStory vs Mercari

FullStory logo

FullStory

E-Commerce

Digital experience intelligence platform

From
Free
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

  • Each has a real cost: FullStory free tier limited to 30,000 sessions per month, no 5,000+ monthly active user sites; 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: FullStory covers Session replay, Mercari covers Flat seller commission.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which FullStory and Mercari actually diverge.

Attributes where FullStory and Mercari differ
AttributeFullStoryMercari
Pricing modelquoteFree to list; 10 percent seller commission on sale price plus payment processing fee
PlatformsWeb, MobileiOS, Android, Web
Founded2014Unknown

Identical on both: starting price (Free), free tier (Yes), 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 FullStory

  • Session replay
  • Heatmaps
  • Conversion funnels
  • User journey mapping
  • Error tracking
  • Frustration signals
  • Search functionality
  • Custom events

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.

FullStory

  • User experience analysisnot Mercari
  • Bug reproductionnot Mercari
  • Conversion optimizationnot Mercari
  • Customer supportnot Mercari
  • Product developmentnot Mercari

Mercari

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

Where each one falls short

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

FullStory

  • Free tier limited to 30,000 sessions per month, no 5,000+ monthly active user sites
  • Personal email addresses cannot be used for signup; business email domain required
  • Paid plan pricing not publicly listed, requires sales contact for quotes
  • Free plan has no email support, only community-based assistance
  • Mobile app analytics requires a separate add-on purchase

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

FullStory

Free
  • FreeFree
    • 1,000 sessions/month
    • 14-day data retention
    • Basic analytics
  • Business$undefined/month
    • Custom sessions
    • 3-month retention
    • Advanced analytics
  • Enterprise$undefined/month
    • Unlimited sessions
    • Custom retention
    • Advanced privacy controls

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 FullStory if

  • You need session replay.
  • You want to start without paying.
  • You work on Web, Mobile.
  • You also want heatmaps.
FullStory 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 FullStory or Mercari better?
Neither clearly leads. FullStory starts at Free and Mercari at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, FullStory or Mercari?
FullStory starts at Free and Mercari at Free.
Does FullStory or Mercari run on more platforms?
FullStory runs on Web, Mobile. Mercari runs on iOS, Android, Web.
Can I use FullStory for free?
Both have a free tier, so you can try either at no cost before committing.
What is FullStory best used for?
FullStory is most often used for user experience analysis, bug reproduction, conversion optimization, customer support. Of those, user experience analysis and bug reproduction are not what Mercari is typically brought in for.
What can FullStory do that Mercari cannot?
FullStory covers Session replay, Heatmaps, Conversion funnels, User journey mapping. Mercari covers Flat seller commission, Prepaid shipping labels, Local pickup and offers, Smart pricing and price drops.

Answered from the vendors’ own pages

FullStory: What does FullStory's free tier include?

30,000 sessions per month, 10 user seats, 5,000 server-side events per month, 1 year of session replay retention, and 1 year of product analytics retention. Session capture pauses when you exceed the monthly limit, though existing sessions remain accessible.

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.

FullStory: What features are excluded from the free plan?

Dashboards, configurable form privacy, Go-Live functionality, Streams, client-side rate hooks, mobile app analytics, and StoryAI are not available on the free tier. Email support is also unavailable; only community-based help is provided.

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.

FullStory: Can I use a personal email to sign up for FullStory's free plan?

No. FullStory requires a business email domain for signup; personal email services like Gmail cannot be used for free plan registration.

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.

FullStory: How does FullStory integrate with Slack?

FullStory's Slack integration allows individual users to send noteworthy sessions to Slack channels. Advanced and Enterprise plans can configure Alerts to receive notifications in Slack when user metrics exceed defined thresholds.

Source
FullStory: What analytics platforms does FullStory integrate with?

FullStory integrates with Segment, Mixpanel, Adobe Analytics, Google Analytics, Salesforce, HubSpot, and others. These integrations allow you to attach FullStory session URLs to events in your analytics platform for cross-platform correlation.

Source
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