Klaviyo vs Sage
A detailed, side-by-side comparison of Klaviyo and Sage. We compare features, pricing, ease of use, and value for money to help you make the right choice in 2026.
Reviewed by the Ikaroa team · Last updated: March 2026
Quick Verdict
Klaviyo edges ahead overall with a rating of 4.5/5. However, Sage (3.9/5) may be the better fit if you prioritise UK businesses wanting a trusted, established accounting platform with strong tax compliance. Read on for the full breakdown.
Klaviyo vs Sage at a Glance
Klaviyo
★ 4.5Klaviyo is the email and SMS marketing platform of choice for e-commerce businesses. Deeply integrated with Shopify, WooCommerce, and other e-commerce platforms, it uses customer data to power highly personalised email and SMS campaigns that drive revenue. Known for its powerful segmentation, predictive analytics, and revenue attribution.
Starting from: £0/month
Best for: E-commerce businesses wanting data-driven email and SMS marketing
Read full review →Sage
★ 3.9Sage is a long-established accounting software provider with products ranging from simple cloud accounting to enterprise-grade ERP systems. Sage Accounting (formerly Sage One) is its cloud product for small businesses, offering invoicing, expense management, VAT returns, and bank feeds. Trusted by UK businesses for decades.
Starting from: £12/month
Best for: UK businesses wanting a trusted, established accounting platform with strong tax compliance
Read full review →Klaviyo vs Sage Feature Comparison
Here is how Klaviyo and Sage compare across the features that matter most. We have tested both platforms extensively across client implementations.
| Feature | Klaviyo | Sage |
|---|---|---|
| Free Plan Available | Yes | No |
| Starting Price | £0/month | £12/month |
| Best For | E-commerce businesses wanting data-driven email and SMS marketing | UK businesses wanting a trusted, established accounting platform with strong tax compliance |
| Our Rating | 4.5/5 | 3.9/5 |
| Mobile App | Limited | Yes |
| Email Marketing | No | No |
| Automation | Yes | Limited |
| Reporting | Basic | Yes |
| Integrations | Limited | Extensive |
| API Access | Limited | Limited |
| Ikaroa Exclusive Discount | N/A | N/A |
Klaviyo vs Sage Pricing
Pricing is often the deciding factor. Here is a full breakdown of what each platform charges at every tier:
Klaviyo Pricing
Free
£0/month
- ✓250 contacts
- ✓500 email sends
- ✓150 SMS credits
- ✓Core features
£16/month
- ✓500 contacts
- ✓5,000 emails
- ✓A/B testing
- ✓Automation flows
Email & SMS
£52/month
- ✓500 contacts
- ✓5,000 emails
- ✓1,250 SMS credits
- ✓Automated SMS flows
Sage Pricing
Accounting Start
£12/month
- ✓Invoicing
- ✓Expense tracking
- ✓Bank feeds
- ✓Financial summaries
Accounting
£26/month
- ✓Everything in Start
- ✓Cash flow forecasting
- ✓Quotes & estimates
- ✓Purchase invoices
- ✓Multi-currency
Accounting Plus
Custom
- ✓Everything in Accounting
- ✓Inventory management
- ✓Multiple tax rates
- ✓Project tracking
Not sure which to pick?
Our team has implemented both Klaviyo and Sage for clients. We can help you decide based on your specific needs.
Klaviyo Pros and Cons
✓Pros
- •Best-in-class e-commerce integrations
- •Powerful predictive analytics and segmentation
- •Excellent revenue attribution reporting
- •Deep Shopify integration
- •Strong template library for e-commerce
✗Cons
- •Expensive as contact list grows
- •Steep learning curve for beginners
- •Overkill for non-e-commerce businesses
- •Free plan is very limited
- •SMS pricing can add up quickly
Sage Pros and Cons
✓Pros
- •Trusted UK brand with decades of history
- •Strong compliance with UK tax requirements
- •Good for businesses growing from simple to complex
- •Direct HMRC submission for VAT
- •Solid bank feed integrations
✗Cons
- •Interface feels less modern than Xero
- •Limited integrations compared to Xero
- •Customer support has mixed reviews
- •Pricing has increased significantly
- •Add-on costs can add up
Our Verdict: Klaviyo vs Sage
Both Klaviyo and Sage are solid options, but they serve different needs. Having implemented both for multiple clients, here is our recommendation:
Choose Klaviyo if you need E-commerce businesses wanting data-driven email and SMS marketing. With a starting price of £0/month and a rating of 4.5/5, it offers best-in-class e-commerce integrations.
Choose Sage if you need UK businesses wanting a trusted, established accounting platform with strong tax compliance. Starting at £12/month with a 3.9/5 rating, it excels at trusted uk brand with decades of history.
Still not sure? Talk to the Ikaroa team. We have helped hundreds of businesses make this exact decision, and we are happy to point you in the right direction.
🎁 Get either product at a discount through Ikaroa Partners
Consider Open Doors Instead
Why choose between Klaviyo and Sage? Open Doors gives you the best features of both in one platform, for less. It is an all-in-one CRM with email marketing, SMS, funnels, booking, invoicing, automation, and more, starting at just £97/month with unlimited contacts.
Need implementation help?
Ikaroa can set up Klaviyo or Sage for your business, migrate your data, and train your team. We have done it dozens of times.
Free consultation. No obligation.