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Clerk.io vs Nosto

Clerk.io and Nosto both land on Depends.

Clerk.io

clerk.io

Depends
Confidence: Medium

Buy if you run a growing online store with real traffic and want search, recommendations, and email from one vendor.

Read the full report

Nosto

nosto.com

Depends
Confidence: Medium

Buy if you run an established Shopify or Magento store with steady traffic and budget for personalization; the suite is genuinely strong there.

Read the full report

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Clerk.io versus Nosto
CompareClerk.ioNosto
VerdictDependsDepends
Best forMid-size stores with steady trafficEstablished Shopify/Magento stores
Who it's not forBrand-new stores with little traffic . AI has nothing to learn fromSmall or new stores . custom pricing won't pencil out
PrivacySOC 2 and ISO 27001 trust center with GDPR DPA; one high-severity 2022 WordPress plugin CVE, fixed in v4.0.0.⁸One disclosed reflected XSS (CVE-2025-40726, 2025); no known breaches in reviewed sources.16
Support qualityNo direct support evidence found.No support evidence in reviewed sources
Public sentimentReviews are strong . 4.8/5 on G2 (126 reviews) and 4/5 on Trustpilot . though many testimonials are vendor-published.¹Across 235 G2 reviews and Shopify App Store reviews, users praise the friendly interface and results while cost concerns recur.11
Biggest gotchaWordPress sites must run plugin version 4.0.0+; older versions carry CVE-2022-3907.⁸Custom quote pricing . no number until sales talks; budget negotiation time

Pick Clerk.io when

  • Mid-size stores with steady traffic
  • Shopify, WooCommerce, Magento shops
  • Teams wanting search + recs + email in one
  • EU stores needing GDPR-compliant vendor

When Clerk.io is not a fit

  • Brand-new stores with little traffic . AI has nothing to learn from
  • Shops fine with platform-native search plus one simple app
  • Buyers who need transparent flat pricing up front
  • Non-commerce websites . this is e-commerce only

Pick Nosto when

  • Established Shopify/Magento stores
  • Mid-market brands with steady traffic
  • Teams consolidating search, recs, merchandising

When Nosto is not a fit

  • Small or new stores . custom pricing won't pencil out
  • Anyone wanting transparent, self-serve pricing
  • Non-ecommerce sites; it's store-only
  • Buyers wanting a cheap single-feature widget

Sources

  1. Clerk.io Reviews & Product Details - G2g2.com
    review
  2. Read Customer Service Reviews of clerk.io - Trustpilottrustpilot.com
    review
  3. Clerk.io Reviews - Capterracapterra.com
    review
  4. Clerk.io Reviews - Glassdoorglassdoor.com
    review
  5. Clerk.io Featuresclerk.io
    official
  6. Clerk.io Pricing Calculatorclerk.io
    official
  7. Clerk.io SOC 2 Compliance - Trust Centertrust.clerk.io
    security
  8. CVE-2022-3907 - Clerk.io WordPress Pluginavd.aquasec.com
    security
  9. Clerk.io Revenue 2025: $12M Est. ARR - GetLatkagetlatka.com
    news
  10. Danish startup Clerk.io expands rapidly throughout Europeecommercenews.eu
    news
  11. Nosto Reviews . G2g2.com
    review
  12. Nosto | AI Search & Discovery . Shopify App Storeapps.shopify.com
    review
  13. Nosto . Trustpilottrustpilot.com
    review
  14. Nosto Review 2026: AI-Powered Product Discovery . EcommerceParadiseecommerceparadise.com
    review
  15. Nosto named 'Leader' in E-Merchandising by G2 . Bailadorbailador.com.au
    review
  16. CVE-2025-40726 Detail . NVDnvd.nist.gov
    security