Klaviyo vs MailerSend: Complete Comparison (2026)
An in-depth comparison of Klaviyo and MailerSend to help you choose the right tool for your business.
Last updated: November 2026
Klaviyo
6.9/10
Klaviyo is an email, SMS and customer data platform for ecommerce brands, priced by active profiles and built around store data and automated flows.
MailerSend
6.9/10
MailerSend is a transactional email and SMS API with SMTP relay and a template builder, aimed at developers and businesses sending app-triggered messages.
Feature-by-Feature Comparison
| Feature | | |
|---|---|---|
| Scores | ||
| Overall Rating | 6.9/10 | 6.9/10 |
| Integration | 9/10 | 7/10 |
| Analytics | 9/10 | 6/10 |
| Cost | 4/10 | 7/10 |
| Customization | 8/10 | 6/10 |
| Ease of Use | 6/10 | 8/10 |
| Scalability | 8/10 | 7/10 |
| Security | 7/10 | 6/10 |
| Support | 5/10 | 8/10 |
| Pricing | ||
| Free plan | Yes | Yes |
| Cheapest paid plan | $20/mo Email | $7/mo Hobby |
| Estimated cost for 10 users | Free Free | $110/mo Professional |
| Features | ||
| Email Marketing | ||
| E-commerce Features | Not listed | |
| Landing Pages | Not listed | |
| Segmentation | Not listed | |
| SMS Marketing | Not listed | |
Klaviyo vs MailerSend cost by team size
Klaviyo and MailerSend cost the same at 1 user; Klaviyo costs less from 5 users.
| Team size | Klaviyo | MailerSend |
|---|---|---|
| 1 user | FreeFree | FreeFree |
| 5 users | FreeFree | $7/moHobby |
| 10 users | FreeFree | $110/moProfessional |
| 25 users | FreeFree | $110/moProfessional |
| 50 users | FreeFree | $110/moProfessional |
The plan that fits each team size, billed monthly, before add-ons and usage charges. Each cost opens that tool's pricing calculator for the team size.
Which One Should You Choose?
Why choose Klaviyo
- Lower estimated cost for 10 users: Free vs $110/mo
- Higher Analytics score (9/10 vs 6/10)
- Higher Integration score (9/10 vs 7/10)
- Better fit for marketing teams (9/10 vs 4/10)
- Better fit for e-commerce (10/10 vs 6/10)
Why choose MailerSend
- Higher Cost score (7/10 vs 4/10)
- Higher Support score (8/10 vs 5/10)
- Better fit for startups (9/10 vs 6/10)
- Better fit for freelancers (6/10 vs 3/10)
Pros & Cons
Klaviyo
Pros
- Deep native integration with Shopify and other stores lets marketers segment on real purchase and browsing data.
- A free plan with 250 profiles and a 20 USD entry plan make it cheap to start.
- Since July 2026, SMS uses dollar-based plans with over 70 tiers, so gaps between plans are smaller and larger plans get lower per-message rates.
- A broad product suite covering reviews, helpdesk, personalization and AI agents can replace several separate tools.
Cons
- Billing by active profiles and uneven tier steps cause cost jumps, for example from 150 USD at 10,000 profiles to 350 USD at 15,000 on the Email plan.
- Many features, such as Reviews, Helpdesk, Personalization and Composer, are separately priced add-ons that raise the total bill.
- Free accounts get email support only for the first 60 days, and reviewers on G2 and Trustpilot report slow or hard-to-reach support.
- New users report a learning curve with segments, event triggers and flow logic.
MailerSend
Pros
- Developers can send through a REST API or an SMTP relay, with SDKs and connectors for Laravel, Django, Rails, Symfony, Supabase and Firebase.
- A free tier of 500 emails and a $7 Hobby plan make it cheap to start.
- Capterra reviewers repeatedly praise its responsive support and clear documentation.
- Built-in blocklist and DMARC monitoring help teams protect deliverability.
- Starter and higher plans add an SMS API, and a WhatsApp add-on is available.
Cons
- It is built for transactional email, not full marketing campaign management.
- Reviewers report sudden throttling or account suspensions after bounce or complaint thresholds are crossed.
- Free and Hobby plans keep only one day of activity history.
- SMS is limited to the USA and Canada.
Not sold on either?
Frequently Asked Questions
Klaviyo and MailerSend both score 6.9/10 on our Marketing criteria. The largest gap is in Analytics: 9/10 for Klaviyo and 6/10 for MailerSend.
Klaviyo costs less for 10 users: free on its Free plan, against about $110/mo on its Professional plan for MailerSend, billed monthly.
Yes, both Klaviyo and MailerSend have a free plan.
Klaviyo is the better fit for marketing teams: we rate it 9/10 for them, against 4/10 for MailerSend.
