Comparison · InboxRatio Editorial
Klaviyo vs Omnisend
This comparison is built from three datasets we maintain for every catalog service: documented pricing captured from the vendors' own configurators, the documented-feature matrix compiled from vendor documentation, and user ratings from G2, Capterra and Trustpilot — each value dated at its capture. Neither service has a measured deliverability score yet; we compare only what the data supports.
Editorial verdict — who fits whom
Both are e-commerce-first platforms; the split is depth versus price. At 1,000 contacts Klaviyo's Email plan is $30/mo and Omnisend's Standard is $20/mo — both already pass our functional filter at entry (checked 2026-08-19). The distance widens at 50,000 contacts: $720/mo for Klaviyo against $413/mo for Omnisend (checked 2026-08-21). Klaviyo documents more of the 60 capabilities we track — 44 yes-cells to Omnisend's 36, including a built-in CRM and automated warmup (checked 2026-08-21) — while Omnisend holds the stronger weighted rating: 4.6/5 across 1,348 reviews versus Klaviyo's 4.14/5 across 2,263 (checked 2026-08-21).
Klaviyo fits data-heavy stores that will use its documented CRM, AI analytics and warmup tooling and accept the steeper curve at list scale. Omnisend fits stores that want documented email-plus-SMS automation at a flatter price. Neither has a measured InboxRatio deliverability score yet.
Measured deliverability
Inbox placement, measured on our seed list
Klaviyo · tested September 2026
85/100Good deliverability
- Inbox89.7%
- Spam4%
- Gmail90/100
- Outlook65/100
- Yahoo89/100
Omnisend · tested September 2026
69/100Fair deliverability
- Inbox80%
- Spam11.6%
- Gmail86/100
- Outlook12/100
- Yahoo95/100
Same campaign archetype, same seed composition, same measurement window for every service — how we test.
From our pricing dataset
Pricing side by side
Cheapest paid tier covering each volume, and the functional tier — the cheapest tier with automation, API access and vendor-branding removal all included — captured from the vendors' own pricing configurators on monthly billing.
| Volume | Klaviyo | Omnisend |
|---|---|---|
| 1,000 contactscheapest paid tier | $30/mo | $20/mo |
| 1,000 contactsfunctional tier | $30/mo(Email) | $20/mo(Standard) |
| 50,000 contactscheapest paid tier | $720/mo | $413/mo |
| 50,000 contactsfunctional tier | $720/mo(Email) | $413/mo(Standard) |
Pricing checked 21 August 2026 · monthly billing, prices as shown by the vendor. Where a vendor has no exact step at a volume, the nearest covering step was captured (noted in the dataset).
Full pricing by volume:Klaviyo pricing →Omnisend pricing →
From our feature dataset
Features side by side
What each vendor documents, category by category: ✓ documented, ◐ partial or tier-gated, × documented as not offered, — not documented by the vendor. All marks reflect vendor documentation, not our testing.
| Category | Klaviyo | Omnisend |
|---|---|---|
| 3✓3— | 5✓1— | |
| Automation | 6✓ | 5✓1◐ |
| AI | 5✓1— | 5✓1◐ |
| Personalization | 3✓1— | 4✓ |
| Analytics | 4✓ | 3✓1◐ |
| Developer features | 3✓1◐1— | 2✓1◐2— |
| Marketing platform | 6✓1— | 5✓2— |
| E-commerce | 5✓ | 5✓ |
| Deliverability | 12✓3◐2— | 7✓7◐1×2— |
Where they differ most
17 of the tracked capabilities are documented differently; the sharpest contrasts — computed from the dataset, never hand-picked:
| Capability | Klaviyo | Omnisend |
|---|---|---|
| Transactional emailEmail | Not documented | Documented |
| Drag-and-drop editorEmail | Not documented | Documented |
| AI subject linesAI | Not documented | Documented |
| Dynamic contentPersonalization | Not documented | Documented |
| SDKs / client librariesDeveloper features | Documented | Not documented |
| CRMMarketing platform | Documented | Not documented |
| Landing pagesMarketing platform | Not documented | Documented |
| ChatbotsMarketing platform | Documented | Not documented |
| Automated warmupDeliverability | Documented | Documented as not offered |
| Blacklist monitoringDeliverability | Documented | Not documented |
Features checked 10 September 2026 · from vendor documentation and official feature pages.
Independent review platforms — shown as context; never part of our measured Deliverability Score
What users say
Klaviyo
3.2/5
2,263 reviews, weightedSubstantial review base
- Trustpilot1.7/5 · 367 reviews
- G24.6/5 · 1,361 reviews
- Capterra4.6/5 · 535 reviews
Checked 21 August 2026
Omnisend
4.5/5
2,592 reviews, weightedSubstantial review base
- Trustpilot4.4/5 · 512 reviews
- G24.6/5 · 1,244 reviews
- Capterra4.7/5 · 836 reviews
Checked 10 September 2026
Aggregator scores diverge across platforms by design — read each platform's number with its review count; the weighted average is never shown without them.
Generated from our datasets — every value verified and dated
Frequently asked questions
Is Klaviyo or Omnisend cheaper at 50,000 contacts?
At 50,000 contacts, the cheapest paid Klaviyo tier covering that volume is $720/mo and the cheapest paid Omnisend tier is $413/mo — vendor-page prices on monthly billing, last checked 21 August 2026. Which works out cheaper for you also depends on which tier carries the features you need; the side-by-side tables above show both services' entry and functional tiers at each volume.
Do users rate Klaviyo or Omnisend higher?
Klaviyo averages 3.2/5 across 2,263 reviews and Omnisend averages 4.5/5 across 2,592 reviews on G2, Capterra and Trustpilot (Trustpilot counts for half of each average, checked 10 September 2026). Review-base sizes differ, so read the averages together with the counts. User ratings are context only — never part of our measured Deliverability Score.
What are the main feature differences between Klaviyo and Omnisend?
Of the 60 capabilities we track per vendor, Klaviyo and Omnisend document 17 of them differently. The comparison table above lists the headline contrasts — cells where one vendor documents a capability the other documents as absent or does not document at all. All marks reflect vendor documentation, not our testing.
Has InboxRatio tested Klaviyo and Omnisend's deliverability?
Klaviyo has a published seed-list placement test dated 3 September 2026. Omnisend has a published seed-list placement test dated 6 September 2026. The table above shows both services' measured inbox placement and Deliverability Scores. How we test.
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