Unitpost vs Klaviyo

Klaviyo is an email and SMS marketing platform for online stores, with flows on store events, segments on tracked events, predictive analytics, and SMS, push and WhatsApp on the same profiles. Unitpost covers transactional and marketing email in one product with unlimited contacts on paid plans and a free tier of 5,000 emails a month. Across 7 compared capabilities, Unitpost leads on 4 and Klaviyo leads on 1.

Which should you choose?

Choose Klaviyo if

You run an online store and most of your revenue comes from abandoned-cart, browse and win-back flows
You segment on what people did in your store, not on fields your app sets
Your marketing team builds flows without engineering
You want predictive analytics on each customer

Choose Unitpost if

Your app sends receipts, resets and alerts to the same people your campaigns reach
You'd rather pay for what you send than for every profile that could receive marketing
You want a REST API, SMTP and an MCP server on every plan, with SDKs for the languages you use
You want SMS on the same contacts, API key and bill as email

What Klaviyo does well

Stated plainly, because a comparison that pretends otherwise is not worth reading.

Flows that start on store events, such as a price drop or low inventory, as well as list joins, dates and any tracked event
Segments on tracked events, such as orders, and on profile properties, plus predictive analytics on each profile
Email, SMS, MMS, push and WhatsApp consent on one profile
A free plan to start, and an agency partner program

Pricing and free tier

Unitpost: 5,000 emails/month, 200/day, no credit card; On paid plans your monthly price is a sending allowance you spend at your tier's rate, and it refreshes every month. Marketing and unlimited contacts are included rather than billed as add-ons.
Klaviyo: Up to 250 active profiles and 500 email sends a month; Email is priced by active profiles: everyone Klaviyo can email counts, customers who never subscribed included, and the plan moves up a tier as the list grows. SMS and MMS are bought as credit packs on top, with carrier fees included.

Klaviyo pricing and free-tier details last verified 2026-11. Providers change these often — check their pricing page before making a decision.

Feature comparison

Feature and pricing comparison between Unitpost and Klaviyo
Capability	Unitpost	Klaviyo
Free plan	5,000 emails/month, 200/day, no credit card	Up to 250 active profiles and 500 email sends a month
What the bill grows with	Sends. Unlimited contacts on paid plans	Active profiles, customers who never subscribed included
Store flows and predictive analytics	Not offered: campaigns ship today, automations are in early access	Flows on store events and predictive analytics on each profile
Transactional email	Included on every plan, on the same API and contacts as campaigns	Sent through flows triggered by your events
SMS	On every paid plan: the same contacts, API key, webhooks, and monthly sending allowance as email, at a published per-country rate	Credit packs on top of the email plan, carrier fees included
API and SDKs	REST API, SMTP and an MCP server; SDKs for Node.js, Python, Ruby, PHP, Laravel, Go, Java, Rust, .NET	REST API with dated revisions and read-only keys
One-key import from Klaviyo	Migration Assistant reads your account with a Klaviyo Read-Only private key and previews what it can import before writing anything; the migration guide lists exactly what moves	n/a

How do I migrate from Klaviyo?

Paste a Klaviyo API key into the Migration Assistant (it only reads with it) and it previews what it can bring across before anything is written. Klaviyo keeps sending the whole time, so there is no gap in delivery.

Imports: contacts, unsubscribes and consent, suppressions (bounces and blocks), sms numbers and consent, lists. Partly imports: segments, templates, sending domains. Rebuild: topics, webhooks, api keys. Stays behind: flows, send history, analytics and forms.

Read the Klaviyo migration guide

Switching from Klaviyo?

Try it on the free tier first

5,000 emails a month free. Verify a domain, send a test, preview the migration.

Start for free Explore the docs

Frequently asked questions

Is Unitpost a Klaviyo alternative?

For a SaaS or app that sends product email and campaigns to the same people, yes: one API and contact list, priced by sends, with SMS on paid plans. For an online store that runs on Klaviyo's store flows, purchase segments and predictive analytics, Klaviyo is the better tool, and Unitpost has no store integrations.

Can I import my Klaviyo profiles into Unitpost?

Yes, with a Klaviyo Read-Only private key. The Migration Assistant brings profiles with their email consent and dated SMS consent, custom properties, lists and segments (as today's members), bounces and manual suppressions, and templates and recent campaigns with Klaviyo tags converted. Profiles with no email address, flows and webhooks stay at Klaviyo.

Do I pay for customers who never subscribed?

Not here. Klaviyo counts every profile it can email, checkout-only customers included. Unitpost prices by what you send, and the importer brings never-subscribed profiles over unsubscribed from marketing, so transactional email still reaches them and campaigns skip them.