shouldiuse.io

VERDICT

Should I use Mercari?

Not disclosed - mercari.com

Depends. Use it if you casually buy or sell secondhand items and accept a flat 10% fee plus imperfect support. Skip it for high-volume or thin-margin selling, where fee changes and seller complaints sting most.

Confidence

Medium. Based on 12+ public sources. Same-name businesses (e.g., Yelp 'Mercari Herrljunga') were excluded as unrelated.

Ratings

  • Value for money
  • Ease of use
  • Feature depthToo little evidence in sources
  • Support quality
  • Security posture

Pricing

10% flat fee

Standard selling

ModelNot disclosed
Monthly fees10% flat
HardwareNot disclosed
Free tierYes

Best for

  • Casual sellers clearing closets
  • Secondhand bargain hunters
  • Collectibles and hobby resellers

Not for

  • High-volume professional resellers
  • Sellers needing responsive support
  • Thin-margin items where 10% kills profit

Gotchas - check before you buy

high

New fee structure since January 2025 added buyer fees; some sellers say it's no longer worth cross-posting

medium

Flat 10% selling fee eats margins on cheap items

medium

Users warn against using Mercari as a holding account for funds

medium

Two improper-authorization CVEs hit the mobile app; keep it updated

Pros and cons

Pros

  • App described as easy and intuitive by mobile reviewers
  • Free to list; flat 10% fee only on completed sales
  • Well-established, legit marketplace per independent reviewers
  • Buyer protection with 24/7 email support

Cons

  • Customer support widely criticized on Trustpilot
  • Sellers report unfair reviews and suspicious buyer behavior
  • Some buyers distrust listings, calling them fake
  • Long-time users say the platform has gotten scummy

Sources & method

Analyzed 9/20/2026 - 12 sources - Legitimate service overall, but two improper-authorization CVEs (CVSS 7.5) and a 2021 Codecov-linked data breach are on record.

official x1review x5security x3news x3
  • CVE-2021-20835, Missing authorization in custom URL scheme handler of the Mercari Android app (Japan), CVSS 7.5.
  • CVE-2024-23388, Improper authorization in custom URL scheme handler of the Mercari app.
  • Codecov supply-chain breach (2021), Mercari was among companies hit by the Codecov incident, exposing customer data.

Key stats

  • Value for money: 3/5

    Rating

  • 10% flat fee

    Starting price

  • 12

    Sources

  • Analyzed

  • Value for money: 3/5. Flat 10% fee; recent fee changes angered users
  • Ease of use: 4/5. App Store reviewers call it easy and intuitive
  • Feature depth. Too little evidence in sources
  • Support quality: 2/5. Trustpilot and BBB report unhelpful support
  • Security posture: 2/5. Two CVEs and a 2021 Codecov breach
  • 10% flat Seller fee Charged only when an item sells
  • Yes Free to list No upfront cost for sellers
  • 2013 Founded Tokyo-headquartered marketplace

Pricing

Standard selling

10% flat fee

  • Charged only when an item sells
  • Free to browse and list
  • 2025 restructure added buyer-side fees

Security

Legitimate service overall, but two improper-authorization CVEs (CVSS 7.5) and a 2021 Codecov-linked data breach are on record.

  • CVE-2021-20835Missing authorization in custom URL scheme handler of the Mercari Android app (Japan), CVSS 7.5.⁸
  • CVE-2024-23388Improper authorization in custom URL scheme handler of the Mercari app.⁹
  • Codecov supply-chain breach (2021)Mercari was among companies hit by the Codecov incident, exposing customer data.10

What users say

Users like the app's simplicity and authentication, but many complain about fee changes, support quality, and seller treatment.

“The Mercari app is very easy and intui”
Apple App Store reviews
“Yes, their authentication is very reliable. I se”
Reddit, r/Mercari
“Ever since the buyer fee changes Mercari has be”
Reddit, r/Mercari
Full analysis

Based on 12+ public sources. Same-name businesses (e.g., Yelp 'Mercari Herrljunga') were excluded as unrelated.

Free to list, legit marketplace, but 10% fees, weak support, scam complaints — fine for casual flips, not serious sellers.

Methodology

Based on 12+ public sources. Same-name businesses (e.g., Yelp 'Mercari Herrljunga') were excluded as unrelated.

Sources

  1. review
  2. review
  3. review
  4. review
  5. review
  6. news
  7. news
  8. security
  9. security
  10. security
  11. official
  12. news

Rate this review

Anonymous. You can change your vote.

Loading votes…

Comments

One queue. No nested comments. Give a display name first. Limit: 200 words per comment and 7 comments per day. You can edit or delete yours.

Save a name to write a comment.

0 / 200 words

No comments yet.