Comparison
Klaviyo vs Omnisend
Klaviyo vs Omnisend for Shopify stores under 25k contacts in 2026 — AI feature delta (MCP vs Customer Agent), active-profiles vs subscribed-contacts billing, and a segmented verdict by list size. Pricing verified 2026-05-26.
Klaviyo
"AI Email Marketing & SMS | B2C CRM" — the autonomous B2C CRM that unifies email, SMS, RCS, WhatsApp and push.
Omnisend
"Email and SMS Marketing for Ecommerce Businesses" — ecommerce-focused email & SMS automation built on feedback of 150,000+ brands.
Affiliate link. Pricing and terms are set by the vendor. details
On this page
At a glance
Most Klaviyo vs Omnisend comparisons in 2026 still frame the decision around per-contact price, where Omnisend wins narrowly. The real 2026 story is the AI feature delta — Omnisend's MCP integration (operator-facing conversational access to store data) and Klaviyo's Customer Agent ($200/mo from April 1, 2026 — shopper-facing conversation handling). They're not substitutes. The other quiet driver is the billing-dimension difference: Klaviyo bills on all active profiles (anyone active in roughly the last 365 days), Omnisend on subscribed contacts only. On the same store Klaviyo's denominator often runs 30–50% larger before any list growth.
Quick stats
Starting price
Klaviyo
$20/mo
Omnisend
$0/mo
Rating
Klaviyo
8.4/10
Omnisend
8.8/10
Integrations
Klaviyo
8
Omnisend
8
Free tier (verified 2026-05-26)
Klaviyo
250 active profiles / 500 emails / 150 SMS credits
Omnisend
250 contacts / 500 emails / 60 SMS credits
Paid at 500 contacts
Klaviyo
$20/mo (Email)
Omnisend
$16/mo (Standard)
Paid at 5,000 contacts
Klaviyo
~$100/mo (Email)
Omnisend
~$51/mo (Standard)
Billing dimension
Klaviyo
All active profiles (~365-day window)
Omnisend
Subscribed contacts only
AI flagship (2026)
Klaviyo
Customer Agent — $200/mo add-on, shopper-facing
Omnisend
MCP — no extra cost, operator-facing
Pricing
Klaviyo
$20/mo
- up to
- —
- Model
- tiered
Tiers: Free $0 (250 active profiles, 500 emails/mo, 150 SMS credits); Email from $20/mo for 251-500 active profiles; scales with active-profile count up to ~$2,300/mo at 250K profiles Pricing gotchas: Billed on active profiles, not emails sent; Klaviyo One mandatory above ~$10K/mo (+20%). Free plan: Yes—250 profiles/500 emails/150 SMS credits Verified 2026-05-30
Omnisend
$0/mo
- up to
- —
- Model
- freemium
Tiers: Free $0 (250 contact reach, 500 emails/mo, 60 SMS credits trial); Standard from $16/mo for 500 contacts (scales to ~$132 at 10K); Pro from $59/mo for 2,500 contacts (unlimited emails); Custom for 150K+ Pricing gotchas: Billed on total billable contacts (subscribers + abandoned-cart + imported); auto-upgrades tier as list grows. Free plan: Yes—250 contacts/500 emails/60 SMS trial credits Verified 2026-05-30
Omnisend starts at $0/mo vs Klaviyo's $20/mo. Pricing models differ: Klaviyo is tiered, Omnisend is freemium.
At 500 contacts: Klaviyo Email $20/mo, Omnisend Standard $16/mo. At 5,000 contacts: Klaviyo Email ~$100/mo, Omnisend Standard ~$51/mo. At 15,000 contacts: Klaviyo Email ~$245/mo, Omnisend Standard ~$160/mo. Klaviyo Customer Agent is +$200/mo add-on from April 1, 2026 (separate from Email plan; introductory $140/mo ran through March 31, 2026). Klaviyo One mandatory above $10,000/mo standard spend adds 20% to the bill.
Features
Klaviyo
- Predictive Analytics (CLV / Churn Risk / Next Order Date) — Predicts customer lifetime value, churn probability, and expected next purchase date per profile
- Klaviyo AI (generative content) — Generates subject lines, email copy, SMS copy, and form copy in brand voice
- Klaviyo Data Platform (Advanced KDP) — Customer data platform layer with advanced data ingestion, identity resolution and segmentation
- Customer Hub — Branded self-service customer portal showing orders, loyalty, recommendations
- Marketing Analytics — Cross-channel attribution and advanced marketing reporting
- Helpdesk / Customer Agent — Native helpdesk product with AI Customer Agent for ticket resolution
Omnisend
- AI Segment Builder (natural language) — Describe a segment in plain English and AI builds the rules
- Flow-Aware Content Generation — AI looks at the entire automation workflow and suggests content that progresses across messages
- Personalized Product Recommender — AI analyzes browsing behavior to insert personalized products in every email
- Forms AI Assistant — Builds full form design/copy/visuals from a prompt with self-optimizing variants
- Customer Lifecycle Map — AI segments subscribers by RFM into lifecycle stages with retention suggestions
- MCP Integration with ChatGPT/Claude — Talk to your Omnisend account through Claude or ChatGPT to create campaigns and check performance
Shopify integration
Klaviyo
Deep native Shopify integration; Shopify App Store; Built-for-Shopify; near real-time sync of customers, products, orders and events; native Customer Hub for Shopify storefronts; Klaviyo SMS supported; embedded forms and popups
Omnisend
Deep native Shopify integration; Shopify App Store; Built-for-Shopify badge; one-click install; supports Shopify Flow; popups, signup forms and automation flows tied to Shopify events
Integrations
Only Klaviyo
- Segment
- Snapchat
Both
- Google Ads
- Meta
- TikTok
Only Omnisend
- BigCommerce
- Shopify
- WooCommerce
Customer support
Support rating (aggregated from independent review platforms like G2, Capterra, Shopify App Store): Klaviyo 8.4/10, Omnisend 9.1/10. This is an editorial composite of channel availability, response speed, and resolution quality — see the individual reviews below for specifics.
Pros & cons
Klaviyo
Pros
- Deep Shopify integration & flow builder
- Behavioral segmentation depth (9.0 G2 score)
- Predictive AI / CLV scoring
Cons
- Steep price scaling as contacts grow
- Support quality drops on lower tiers
- Reporting requires data exports for advanced analysis
Omnisend
Pros
- Ease of use significantly higher than Klaviyo/Mailchimp
- 24/7 live chat support with ~4 min avg response
- All-in-one email + SMS + push at lower price point
Cons
- Some users report missing advanced features (e.g. flow audits, deeper analytics)
- Pop-up builder limitations
- Sales attribution lags vs. Klaviyo
When each one wins
Winner: Omnisend
Sub-5k contacts — cheaper-math play
Omnisend Standard at $16–$50/mo beats Klaviyo Email by 30–50% at this band, especially because Omnisend bills on subscribed contacts and Klaviyo on all active profiles (typically a 30% larger denominator on the same store). MCP integration is included at no extra cost.
Winner: Klaviyo
5k–25k contacts with ecommerce flow needs
Klaviyo's 80+ pre-built ecommerce flows, event-level segmentation, and predicted CLV pay back the price premium for stores generating $0.80+ revenue per subscriber per month. Behavioral segmentation depth is the deciding factor — Klaviyo handles 'viewed product in collection X, predicted CLV >$200, hasn't purchased in 60 days' natively.
Winner: Omnisend
AI-first operator — analytics queries
Omnisend MCP lets ChatGPT and other compatible AI clients query your Omnisend account conversationally — campaign post-mortems, segment ideation, performance debugging. No equivalent on Klaviyo's Email plan. Klaviyo Customer Agent is shopper-facing (support automation), not operator-facing — different problem, different price point.
Winner: Omnisend
High SMS volume (>1,000 sends/mo)
Omnisend Pro bundles SMS credits into the plan; Klaviyo charges per-message overage on top of a +$15/mo SMS add-on. For meaningful SMS volume Omnisend Pro often pencils out cheaper than Klaviyo Email + SMS at the same contact band.
Our verdict
For Shopify stores under 25,000 contacts in 2026, the choice splits on what you're optimizing. Sub-5k stores wanting cheaper math, faster setup, and ChatGPT-style access to store data via Omnisend MCP — pick Omnisend, typically 30–50% lower monthly bill. 5k+ stores that need ecommerce flow depth (browse abandonment, post-purchase product recommendations, predicted CLV), or that already pay for support and would benefit from Klaviyo Customer Agent's email-attributed conversation handling — pick Klaviyo. The April 1, 2026 Customer Agent jump from $140 to $200 doesn't flip the decision — it's a separate $200/mo add-on, not a baseline price bump. Decisive question: do you need behavioral-event-level segmentation? If yes, Klaviyo. If 'good-enough' segmentation plus operator-facing AI via MCP is the priority, Omnisend. For the full Klaviyo pricing breakdown, see /pricing/klaviyo. For the full Omnisend pricing breakdown (billable-contacts denominator + MCP on Free), see /pricing/omnisend.
Klaviyo
"AI Email Marketing & SMS | B2C CRM" — the autonomous B2C CRM that unifies email, SMS, RCS, WhatsApp and push.
Omnisend
"Email and SMS Marketing for Ecommerce Businesses" — ecommerce-focused email & SMS automation built on feedback of 150,000+ brands.
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