Klaviyo vs Sender

Klaviyo

• Repeated price rises - 2022 increase and up to 25% auto-upgrades in 2025(10/10)
• Pricing based on ALL profiles, not just active subscribers(9/10)
• Too expensive for small e-commerce startups(7/10)
• Billing now counts all active profiles, so bills jump after the Feb 2025 change(8/10)
• SMS credits cost extra on top of already expensive plans(6/10)

Sender

• No refund after suspension or for unused plans(8/10)
• Automatic upgrade to a bigger plan at renewal(6/10)
• Unused email credits are lost when you downgrade(5/10)

Klaviyo

• No phone support - email and chatbot-based help only(8/10)
• Support just repeats documentation without real help(7/10)
• Compliance reviews and disabled accounts get slow or no replies(8/10)

Sender

No signals

Klaviyo

• Accounts suspended without warning or explanation(9/10)

Sender

No signals

Klaviyo

• Segment loading and template editor painfully slow(7/10)
• Klaviyo emails going to spam or the Promotions tab(8/10)

Sender

• Sender emails going to spam(7/10)

Klaviyo

• Steep learning curve despite powerful features(5/10)
• Basic functions unnecessarily complex and time-consuming(6/10)

Sender

• Templates are limited and look dated(4/10)
• Popup forms not showing on the website(4/10)

Klaviyo

• Duplicate profiles created with no easy way to merge(7/10)
• Shopify events stop syncing and abandoned cart flows don't trigger(8/10)

Sender

• Integrations are thinner than Mailchimp or Klaviyo(4/10)

Klaviyo

No signals

Sender

• Sender account suspended without warning(9/10)
• Suspension thresholds are much stricter than people expect(8/10)

Klaviyo

No signals

Sender

• Account verification blocks sending at the start(6/10)
• Cold outreach and purchased lists get accounts shut down(7/10)

Klaviyo

No signals

Sender

• Automation and segmentation feel too light for advanced marketers(5/10)