Klaviyo vs Sender
Klaviyo and Sender are both popular choices in the email marketing platform space. Sender is the more affordable option at $10/mo — that's $10 less than Klaviyo's $20/mo entry point. Both offer free plans to get started. Klaviyo has the edge with A/B testing, landing pages, advanced analytics. Both tools work well for ecommerce.
Quick Verdict
Klaviyo wins on deliverability, integrations.
Sender wins on price, rating.
Best for most users: Sender (small businesses).
Klaviyo
The platform for unified customer data
Klaviyo is the gold standard for ecommerce email and SMS marketing, particularly for Shopify stores. Its deep integration with ecommerce platforms enables sophisticated automated flows like abandoned cart, post-purchase, and win-back sequences based on real purchase data.
Sender
Affordable email and SMS marketing
Sender offers one of the most generous free plans in email marketing, combined with built-in SMS capabilities. It's an excellent choice for budget-conscious businesses that need both email and SMS marketing without breaking the bank.
Feature Comparison
| Feature | Klaviyo | Sender |
|---|---|---|
| Rating | 4.6/5 | 4.7/5 |
| Starting Price | $20/mo | $10/mo |
| Free Plan | 250 subscribers | 2,500 subscribers |
| Founded | 2012 | 2012 |
| Email Templates | 100 | 50 |
| Integrations | 350 | 50 |
| Deliverability Rate | 99% | 97% |
| Marketing Automation | ✓ | ✓ |
| A/B Testing | ✓ | ✕ |
| Landing Pages | ✓ | ✕ |
| Segmentation | ✓ | ✓ |
| Drag & Drop Editor | ✓ | ✓ |
| SMS Marketing | ✓ | ✓ |
| Ecommerce Features | ✓ | ✓ |
| API Access | ✓ | ✓ |
| Multi-Language | ✓ | ✕ |
| Web Push Notifications | ✕ | ✕ |
| Live Chat | ✕ | ✓ |
| Advanced Analytics | ✓ | ✕ |
Klaviyo: Pros & Cons
Pros
- +Best-in-class ecommerce integrations (Shopify, WooCommerce)
- +Powerful segmentation with predictive analytics
- +Excellent deliverability (99%+)
- +Revenue attribution for every email and SMS
- +Deep customer data platform capabilities
Cons
- −Expensive for large lists
- −Steep learning curve
- −Free plan very limited (250 contacts)
- −SMS credits sold separately
- −Can be overkill for non-ecommerce businesses
Sender: Pros & Cons
Pros
- +Extremely generous free plan (2,500 subs, 15,000 emails)
- +Built-in SMS marketing on all plans
- +Very affordable paid plans
- +Ecommerce integrations for abandoned cart
- +No credit card required for free plan
Cons
- −No A/B testing
- −No landing page builder
- −Smaller integration ecosystem
- −Less well-known brand
- −Limited advanced features
The Verdict
Klaviyo and Sender are closely matched — both score within 0.1 points of each other in our overall rating. Your decision should come down to specific needs rather than overall quality. On deliverability, Klaviyo reports 99% compared to 97% for Sender — a meaningful difference if inbox placement is critical for your campaigns.
| Criterion | Weight | Klaviyo | Sender |
|---|---|---|---|
| Starting Price | 30% | $20/mo | $10/mo |
| Deliverability | 25% | 99% | 97% |
| Rating | 25% | 4.6/5 | 4.7/5 |
| Integrations | 10% | 350 | 50 |
| Free Tier | 10% | Yes | Yes |
Weights determine how much each criterion counts toward the final score. See full methodology
Choose Klaviyo if…
- + You need built-in landing pages
- + You need A/B testing
- + You need advanced analytics
- + You're a shopify
Choose Sender if…
- + You want lower starting costs ($10/mo)
- + You're a small businesses
- + You're a beginners