Klaviyo vs Sendy
Klaviyo and Sendy are both popular choices in the email marketing platform space. Klaviyo starts at $20/mo versus $69 one-time for Sendy. Klaviyo offers a free plan (250 active profiles, 500 email sends/month), while Sendy does not. Klaviyo has the edge with A/B testing, landing pages, SMS marketing.
Quick Verdict
Klaviyo wins on price, deliverability, rating, integrations, free tier.
Best for most users: Klaviyo (ecommerce).
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.
Sendy
Self-hosted email marketing that sends via Amazon SES at 100x lower cost
Sendy is a self-hosted email newsletter application that connects to Amazon SES to deliver emails at a fraction of the cost of traditional email marketing platforms. With a one-time $69 license and SES sending costs of roughly $1 per 10,000 emails, it is ideal for high-volume senders who want to avoid recurring subscription fees. It requires technical setup but offers unlimited subscribers, autoresponders, segmentation, and full data ownership.
Feature Comparison
| Feature | Klaviyo | Sendy |
|---|---|---|
| Rating | 4.6/5 | 4.2/5 |
| Starting Price | $20/mo | $69 |
| Free Plan | 250 active profiles, 500 email sends/month | No free plan |
| Founded | 2012 | 2012 |
| Email Templates | 100 | 0 |
| Integrations | 350 | 20 |
| Deliverability Rate | 99% | 95% |
| 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
Sendy: Pros & Cons
Pros
- +Extreme cost savings — one-time $69 license with Amazon SES sending at ~$1 per 10,000 emails
- +Unlimited subscribers with no tier-based pricing that punishes list growth
- +Full data ownership and privacy since everything is self-hosted on your own server
- +Clean, focused interface without bloated features — does exactly what it promises
- +White-label multi-brand support allows managing multiple client accounts from one install
Cons
- −Requires technical skills for server setup, installation, and ongoing maintenance
- −No built-in A/B testing, landing page builder, or advanced automation workflows
- −UI feels dated and lacks modern design polish compared to SaaS competitors
- −Limited customer support — solo developer product with slow response times reported
- −No drag-and-drop email editor; requires HTML knowledge for custom templates
The Verdict
Klaviyo edges ahead with a 4.6/5 rating compared to Sendy's 4.2/5. The gap comes mainly from ease of use (4.6 vs 3.9) and feature depth (4.6 vs 4.1). On deliverability, Klaviyo reports 99% compared to 95% for Sendy — a meaningful difference if inbox placement is critical for your campaigns.
| Criterion | Weight | Klaviyo | Sendy |
|---|---|---|---|
| Starting Price | 30% | $20/mo | $69/mo |
| Deliverability | 25% | 99% | 95% |
| Rating | 25% | 4.6/5 | 4.2/5 |
| Integrations | 10% | 350 | 20 |
| Free Tier | 10% | Yes | No |
Weights determine how much each criterion counts toward the final score. See full methodology
Choose Klaviyo if…
- + You want lower starting costs ($20/mo)
- + You need a free plan to get started
- + You need SMS marketing
- + You need ecommerce integrations
Choose Sendy if…
- + You're a cost conscious email marketers with large lists
- + You're a technical users comfortable with self hosting and server management
- + Extreme cost savings — one-time $69 license with Amazon SES sending at ~$1 per 10,000 emails