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Klaviyo Review

Depends

Should I use Klaviyo?

AI-powered email marketing and SMS to drive growth, retention, and measurable results. - klaviyo.com

· 1 month ago

Buy if you run a growing ecommerce brand earning real revenue from email and SMS. Skip it if you are a small store or budget-sensitive — pricing is the single most common user complaint.

Confidence

High. Based on 20+ public sources including G2, Trustpilot, Reddit, PCMag, official pricing, and security trackers.

Ratings

  • Value for money
  • Ease of use
  • Feature depth
  • Support qualityNo support evidence found
  • Security posture

Pricing

$0

Free

ModelNot disclosed
Monthly feesNot disclosed
HardwareNot disclosed
Free tierYes

Best for

  • Growing Shopify stores
  • Email + SMS retention marketing
  • Brands with dedicated marketing staff
  • Revenue-focused ecommerce teams

Not for

  • Small stores watching every dollar
  • Teams wanting a simple newsletter sender
  • Non-ecommerce B2B or SaaS companies
  • Anyone unwilling to learn a complex tool

Gotchas - check before you buy

high

Charged by active profiles — costs climb automatically as your list grows

medium

Free plan suits only tiny lists; upgrade pressure arrives fast

medium

Hidden fees flagged in third-party pricing analyses of every plan

medium

Users cite rivals like Sendlane at roughly half the price

Pros and cons

Pros

  • Rated 4.6/5 across 1,356 G2 reviews
  • PCMag praises excellent email marketing with useful AI and omnichannel upgrades
  • Unified customer profiles drove 323% conversion lift in one segmentation case study
  • Email, SMS, reviews, and AI agents consolidated in one platform

Cons

  • Pricing is the most common complaint in a 300-review user study
  • Trustpilot reviewers call it severely overpriced
  • Users say Klaviyo feels complicated to use
  • Security incidents on record, including a 2022 data breach

Sources & method

- 12 sources - Multiple incidents: a 2022 breach of crypto-customer lists, a 2026 password-exposure flaw, and a WordPress plugin XSS CVE.

official x1review x7security x3news x1
  • August 2022 data breach, Hackers stole marketing lists of crypto customers from Klaviyo.
  • 2026 password exposure flaw, Dozens of advertisers may have seen other users' passwords due to a security flaw.
  • CVE-2023-25456 (WordPress plugin), Cross-site scripting in the Klaviyo WordPress plugin, CVSS 4.8 — affects the plugin, not the core platform.
  • Twilio-linked social engineering incident, Customer data exposed in an incident traced to social engineering alongside the Twilio breach.

Key stats

  • Value for money: 2/5

    Rating

  • $0

    Starting price

  • 12

    Sources

  • Analyzed

  • Value for money: 2/5. Top complaint in 300-review user study
  • Ease of use: 2/5. Users report it feels complicated
  • Feature depth: 5/5. Email, SMS, reviews, AI, unified profiles
  • Support quality. No support evidence found
  • Security posture: 2/5. 2022 breach plus 2026 password flaw
  • 4.6/5 G2 rating 1,356 reviews
  • Yes Free tier Free plan aimed at small senders
  • $773M+ Total funding Incl. $320M Series D

Pricing

Free

$0

  • Start free with email and SMS
  • Best suited to small senders

Security

Multiple incidents: a 2022 breach of crypto-customer lists, a 2026 password-exposure flaw, and a WordPress plugin XSS CVE.

  • August 2022 data breachHackers stole marketing lists of crypto customers from Klaviyo.⁸
  • 2026 password exposure flawDozens of advertisers may have seen other users' passwords due to a security flaw.⁹
  • CVE-2023-25456 (WordPress plugin)Cross-site scripting in the Klaviyo WordPress plugin, CVSS 4.8 — affects the plugin, not the core platform.10
  • Twilio-linked social engineering incidentCustomer data exposed in an incident traced to social engineering alongside the Twilio breach.

What users say

Reviewers praise Klaviyo's ecommerce depth and integrations but consistently complain about pricing and learning curve.

“I'd go klaviyo or sendla…”
Reddit, r/Klaviyo
“Klaviyo feels complex be…”
Reddit, r/shopify
“Severely overpriced to s…”
Trustpilot

Alternatives

Compare Klaviyo with each alternative.

  • Brevo

    Budget option cited for teams leaving Klaviyo

Companies that use it

  • ICONIC Cosmetics
  • EquityBee
  • Crayon
Full analysis

Based on 20+ public sources including G2, Trustpilot, Reddit, PCMag, official pricing, and security trackers.

Powerful ecommerce email/SMS platform praised for depth; pricing and complexity make it overkill for small stores.

Methodology

Based on 20+ public sources including G2, Trustpilot, Reddit, PCMag, official pricing, and security trackers.

Read how a report is made.

Sources

  1. Klaviyo Features | G2g2.com
    review
  2. Klaviyo Reviews | Trustpilottrustpilot.com
    review
  3. Klaviyo Review | PCMagpcmag.com
    review
  4. Klaviyo User Reviews Analysis: 300-Review Studyomnisend.com
    review
  5. Why is Klaviyo so complicated to use? | Redditreddit.com
    review
  6. Klaviyo Pricing | Officialklaviyo.com
    official
  7. Klaviyo Pricing Hidden Fees Explained | Omnisendomnisend.com
    review
  8. Email marketing firm hacked, crypto lists stolen | BleepingComputerbleepingcomputer.com
    security
  9. Klaviyo password exposure | TechCrunchtechcrunch.com
    security
  10. CVE-2023-25456 details | Strixstrix.ai
    security
  11. Klaviyo raises $320M Series D | PR Newswireprnewswire.com
    news
  12. Klaviyo segmentation case study | Swankyswankyagency.com
    review

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