kitio.aiKlaviyo vs Sendster
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Klaviyo starts at $20/mo and Sendster starts at $49 one-time. Check both pricing pages for current plans.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Email and SMS campaigns
- Automated flows
- Predictive analytics
- AI campaign builder
- Shopify integration
- AI email writer
- Lead capture forms
- Autoresponders and campaigns
- Built-in email verification
- Deliverability tools
| Feature | Klaviyo | Sendster |
|---|---|---|
| Best for | Email and SMS marketing for ecommerce with AI agents | Self-hosted newsletter script with a built-in AI email writer |
| Category | Marketing | Marketing |
| Pricing model | Freemium | Paid |
| Starting price | $20/mo | $49 one-time |
| Free plan | Yes | No |
| Made by | Klaviyo | Teknikforce |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Klaviyo starts at $20/mo and Sendster starts at $49 one-time. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Free
Free
- Up to 250 active profiles
- 500 email sends/month
- $5 of mobile messages/month
- Built-in reporting
Email
$20/mo
- Starting price, scales with profiles
- Email marketing and flows
Email and SMS
$35/mo
- Starting price, scales with profiles
- Email plus SMS/MMS credits
2 plans
Personal Use
$49 one-time
- One-time payment
- All upgrades free
Commercial Use
$69 one-time
- One-time payment
- Use for client work
- All upgrades free
Prices in USD, checked Oct 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Klaviyo
- Deep ecommerce data
- Strong automation
- Good AI features
- Costs climb with list size
- Overkill for non-ecommerce
Sendster
- One-time payment instead of a subscription
- No contact or send limits in the software
- 30-day refund offered
- You must host and maintain it yourself
- Amazon SES sending costs are extra
- Fewer integrations than hosted platforms
Which one should you choose?
Choose Klaviyo if you want:
- Deep ecommerce data
- Strong automation
- Good AI features
Watch out: costs climb with list size.
Choose Sendster if you want:
- One-time payment instead of a subscription
- No contact or send limits in the software
- 30-day refund offered
Watch out: you must host and maintain it yourself.
Klaviyo vs Sendster FAQ
What is the difference between Klaviyo and Sendster?
Klaviyo: Email and SMS marketing for ecommerce with AI agents. Sendster: Self-hosted newsletter script with a built-in AI email writer. Both are marketing tools.
Is Klaviyo or Sendster cheaper?
Klaviyo starts at $20/mo and Sendster starts at $49 one-time. Check both pricing pages for current plans.
Do Klaviyo and Sendster have free plans?
Klaviyo: Yes. Sendster: No.
Who makes Klaviyo?
Klaviyo is made by Klaviyo, based in United States.
Who makes Sendster?
Sendster is made by Teknikforce.
Which should I choose, Klaviyo or Sendster?
Choose Klaviyo if you value deep ecommerce data and strong automation. Choose Sendster if you value one-time payment instead of a subscription and no contact or send limits in the software.