The short version

Choose Klaviyo if:

You run a Shopify or WooCommerce store and want deep native integration
You need email + SMS in one platform with unified analytics
You want built-in revenue attribution per campaign and flow
You have under 25K active profiles and the per-profile pricing works for you

Choose Sendability if:

You're outgrowing Klaviyo's per-profile pricing as your list scales
You need dedicated IPs and managed deliverability, not shared infrastructure
Your business isn't pure e-commerce and Klaviyo's strengths don't apply
You want data sovereignty with self-hosted infrastructure
You send at volume and need Tableau-grade analytics, not built-in dashboards
You want modular capabilities (deliverability, cleaning, analytics) without replacing your full stack

Feature-by-feature comparison

Not every difference matters for every team. Focus on the rows that affect your business.

Feature	Klaviyo	Sendability
Pricing model	Per active profile. Cost rises directly with list size.	Volume-based. 99 EUR/domain/month + 0.295 EUR CPM. Unlimited contacts.
Contact billing	Charges for all active profiles, including cold and suppressed contacts (changed Feb 2025). Cleaning your list doesn't always lower your bill.	Zero per-contact fees. Store as many contacts as you want. You pay for what you send, not who you store.
Sending infrastructure	Shared IPs by default. Dedicated IP available on higher plans (150K+ profiles).	Dedicated IPs included. Multi-MTA routing across KumoMTA, Sparkpost, and SES.
Deliverability management	Self-service. Deliverability dashboards and guidance, but you monitor and react yourself.	VDMS automated monitoring with proactive intervention per mailbox provider. Human operators step in when it matters.
Analytics	Revenue attribution, campaign performance, flow analytics. Strong for e-commerce metrics.	Tableau Analytics as a Service: inbox placement by provider, segment performance, engagement decay, revenue attribution.
Data ownership	Klaviyo hosts your data. You can export, but the platform is proprietary.	Self-hosted Mautic. Your database, your servers, full export anytime.
Lock-in	Proprietary platform. Flows and segments don't transfer.	Open-source Mautic core. Zero lock-in. If you leave, you take everything.
Marketing automation	Flows builder with behavioral triggers. Pre-built e-commerce templates (abandoned cart, welcome, post-purchase).	Full Mautic automation: segments, campaigns, decision trees, A/B testing. General-purpose, not limited to e-commerce.
E-commerce features	Deep Shopify/WooCommerce sync. Product recommendations, back-in-stock, price drop alerts. This is Klaviyo's core strength.	Mautic plugin ecosystem. E-commerce integrations available but not the primary focus. Sendability is general-purpose infrastructure.
SMS	Native SMS + email in one platform. Unified profiles, combined flows. Strong offering.	Not a native SMS platform. Integrates with third-party SMS providers via API when needed.
Support	Email and chat. Priority support on higher plans. Self-service documentation.	Human operators with 20+ years of deliverability experience. Direct access, not chatbots.
Modularity	All-or-nothing platform. You use Klaviyo for everything or you don't use it.	Each layer available individually. Deploy just VDMS, just data cleaning, or just analytics alongside your existing stack.

The cost comparison at scale

Klaviyo charges per active profile. Sendability charges per volume sent. As your list grows, the gap widens.

Active profiles	Klaviyo Email Plan	Est. monthly sends	Sendability (est.)
10,000	$150/mo	~40K	111 EUR/mo
25,000	$400/mo	~100K	129 EUR/mo
50,000	$720/mo	~200K	158 EUR/mo
100,000	$1,440/mo	~400K	217 EUR/mo
250,000	$2,300/mo	~1M	394 EUR/mo

Klaviyo prices from klaviyo.com as of June 2026 (Email plan only, no SMS). Sendability pricing: 99 EUR/domain/month (yearly) + 0.295 EUR per 1,000 sends. Estimated sends assume 4 emails/contact/month. Sendability includes dedicated IPs, VDMS, Tableau analytics, and human operator support at every tier.

Where Klaviyo genuinely excels

We believe in honest comparisons. Klaviyo built something genuinely strong for e-commerce businesses.

Shopify and WooCommerce integration

Klaviyo syncs with Shopify in real time: product catalog, purchase history, browsing behavior, cart status. For Shopify stores, no other platform matches this depth of native integration.

Revenue attribution

Every email, flow, and campaign shows exactly how much revenue it drove. For e-commerce operators who need to tie sends to sales, Klaviyo's attribution model is built into the core product.

Behavioral segmentation

Segments based on purchase behavior, browsing history, predicted lifetime value, and churn risk. Klaviyo's predictive analytics help e-commerce teams target customers based on what they're likely to do next.

SMS + email in one platform

Unified profiles across email and SMS. Build flows that send an email first, then follow up via SMS if the email isn't opened. One audience, two channels, coordinated automatically.

Pre-built e-commerce flows

Abandoned cart, welcome series, post-purchase, win-back, back-in-stock, price drop. Klaviyo ships with templates that work out of the box for online stores. Less time building, more time optimizing.

Growing ecosystem

183K+ customers, $1.23B in revenue, public company ($KVYO). Expanding rapidly in the EU market. Active community, extensive documentation, and a mature developer API.

These strengths are real. If you run a Shopify store under 25K profiles and need email + SMS in one place, Klaviyo is a strong choice. The calculus changes when you scale past that.

Where Sendability wins at scale

The differences that matter most when your list keeps growing and per-profile pricing starts hurting.

No contact tax

Klaviyo charges for every active profile, including contacts you've suppressed or who haven't opened in months. Since February 2025, even "cleaned" contacts can count toward your bill. With Sendability, you store unlimited contacts and pay only for what you send. A 250K list on Klaviyo costs $2,300/month. On Sendability, the same list with the same send volume costs under 400 EUR.

Dedicated IP infrastructure

On Klaviyo, you share sending IPs with other senders until you hit 150K+ profiles and qualify for a dedicated IP. With Sendability, dedicated IPs are included from day one. Multi-MTA routing across KumoMTA, Sparkpost, and SES means your reputation depends on your behavior alone.

Proactive deliverability management

Klaviyo gives you dashboards and guidance. You monitor your own deliverability. Sendability's VDMS system monitors it for you and intervenes automatically when your reputation shifts at Gmail, Outlook, or Yahoo. You find out after the problem is solved, not before.

Tableau analytics, not built-in dashboards

Klaviyo's analytics are strong for e-commerce metrics. But if you need inbox placement by mailbox provider, engagement decay analysis, or cross-domain deliverability intelligence, you need Tableau-grade analytics. Sendability provides them as a managed service.

Data sovereignty

Klaviyo stores your data on their servers. For businesses with data residency requirements or compliance obligations, this is a real constraint. Sendability runs self-hosted Mautic on infrastructure you control. Open-source core. Full export anytime. Zero lock-in.

Human operators, not self-service

Klaviyo is a self-service platform. You learn the tool, build the flows, diagnose the problems. Sendability includes human operators with 20+ years of email infrastructure experience. When your program hits a wall, you talk to someone who's solved the problem before.

Not just e-commerce

Klaviyo is built for online stores. If your business is SaaS, media, publishing, B2B, or any model that doesn't fit the e-commerce mold, Klaviyo's core strengths don't apply. Sendability is general-purpose email infrastructure that works across industries and use cases.

Modular deployment

With Klaviyo, you use the full platform or nothing. With Sendability, you can deploy just VDMS for deliverability intelligence, just Sendability Verify for data cleaning, or just Tableau analytics alongside your existing ESP. Every layer works standalone.

Common questions about switching

Yes. We handle the full migration: contacts, segments, tags, flow logic. Klaviyo's data export is comprehensive, which makes migrations straightforward. Most Klaviyo migrations complete within a week.

Sendability's Tableau dashboards provide revenue attribution per send and per segment. The data is there. The difference is that Sendability also gives you deliverability intelligence that Klaviyo doesn't: inbox placement by provider, engagement decay, and sending reputation metrics. You see both sides of the equation.

Not natively. Sendability is focused on email infrastructure and deliverability. If SMS is critical to your strategy, we integrate with third-party SMS providers via API. If you need a single platform for email + SMS with unified profiles, Klaviyo handles that well. Be honest about your requirements during the diagnostic and we'll tell you whether the switch makes sense.

If Klaviyo is working and the cost is sustainable, probably not. Klaviyo is a strong platform for e-commerce, especially under 50K profiles. The reasons to switch are specific: per-profile pricing that's eating into margins, need for dedicated IPs, deliverability problems on shared infrastructure, data sovereignty requirements, or a business model that isn't pure e-commerce. If none of those apply, stay where you are.

Mautic has its own automation builder with segments, decision trees, and conditional logic. The pre-built e-commerce templates won't transfer directly, but the flow logic translates. We rebuild your critical automations during onboarding. Most teams find Mautic's automation more flexible once they're past the initial setup.

See if switching makes sense for your business

Get a 15-minute diagnostic. We'll compare what you're paying Klaviyo now with what Sendability costs at your volume, and show you what changes in deliverability and infrastructure.

Book Your Diagnostic

No pitch. No pressure. If Klaviyo is the right fit for your store, we'll tell you.
Or email us at hello@sendability.com

Klaviyo vs Sendability: E-commerce Specialist or Full Infrastructure?