Klaviyo Alternatives: When to Switch, and Which Platform Fits

Hayes Media is an eCommerce growth agency that runs email and SMS retention for DTC and Shopify brands, in Klaviyo for most accounts. Leave Klaviyo when you're paying for depth your program doesn't use. If only SMS needs a specialist tool, keep Klaviyo for email and move just your SMS. The real alternatives are Omnisend, Mailchimp, Attentive and Postscript, and each one fits a different kind of store. This guide compares them by fit, not by rank, and every price is quoted from the vendor's own page, listed in the sources at the end.

A few terms first.

Active profile: Klaviyo's billing unit. Its pricing page describes active profiles as "contacts who may receive marketing emails." Klaviyo's help centre adds that this counts any profile that can be emailed, regardless of consent status.

Billable contact: Omnisend's billing unit. Its pricing page says "You're billed for subscribers and non-subscribers who received automated messages. Unsubscribed contacts aren't billed."

Send limit: A cap on monthly emails tied to your contact tier. Mailchimp's plans and Omnisend's Standard plan both use one.

Flow: An automated sequence triggered by something a customer does, like abandoning a cart or placing a first order.

When does it make sense to leave Klaviyo?

When the bill pays for depth your program doesn't use, or when a channel you care about runs better somewhere else. A switch means rebuilding every flow, template and segment, so the reason needs to be specific.

Your program is a few flows and a newsletter. Klaviyo bills on the profiles it can email, so a big list on a simple program is a big bill for features you don't touch. Our guide to how Klaviyo pricing works explains why that count includes checkout customers who never opted in.

You want a price you can forecast. Klaviyo's pricing page prints exact limits for the free plan only, and paid tiers come from a calculator. Mailchimp and Omnisend show a price and a monthly email limit for each contact tier on their pricing pages.

SMS is your main channel. Attentive and Postscript are built around text messaging. Postscript's pricing page lists SMS and RCS plans, and Attentive's lists SMS, RCS, email and push.

Nobody is running the account. Moving won't fix that. Stale flows on a cheaper platform are still stale. If a lower bill is the only goal, say so and price it honestly.

Price on its own is a weak reason. Compare what each platform costs at your real list size against the gross profit your flows return, then decide.

What are the real alternatives to Klaviyo?

We compare four here: Omnisend and Mailchimp as full email platforms, and Attentive and Postscript as SMS-first tools. Each section says who it fits, how it prices, and its main limit.

Omnisend

Fits: Shopify stores that want the core flows done well on a simpler bill, with support on every plan.

Pricing: Omnisend's pricing page says "Billing is in USD." At 500 contacts, the Standard plan includes "6,000 emails/mo". With 30% off for paying 3 months upfront, the card shows a total of $33.60 instead of $48.00, or $11.20/mo, then says "After 3 months, you will be billed monthly." The Pro plan card shows 2,500 contacts and "Unlimited monthly emails", at $41.30/mo with the same discount. So both /mo figures are the price for your first 3 months.

SMS: SMS sits on the Pro card, with the line "Add Global SMS credits to your Pro plan." The page lists "SMS starting at $0.007" and says the starting rate "applies to high-volume US sends." Its FAQ says the Free plan can use SMS too, so confirm plan access with Omnisend.

Support and migration: The page says 24/7 live chat and email support is included "for all customers, on any plan (including free)." It also offers free migration: "We migrate your contacts, data, and segments for you."

Main limit: Non-subscribers who receive automated messages count toward the bill. Klaviyo counts profiles that never opted in too, so compare the totals, not the rule. The page also claims you can "Save up to 35% vs. Klaviyo". That's the vendor's claim, so test it at your own contact count. Our Klaviyo vs Omnisend comparison goes deeper on segments and flows.

Mailchimp

Fits: Brands whose program is mostly campaigns and simple automations, and who want a fixed monthly price by contact tier.

Pricing: At 500 contacts, Mailchimp's pricing page shows Essentials "starts at $13/month" and Standard "starts at $20/month". The monthly send limit is 10 times your maximum contact count on Essentials, 12 times on Standard and 15 times on Premium. The page notes that overages "apply if contact or email send limit is exceeded." Premium's card starts at 10,000 contacts, so it's built for bigger lists.

Flows: Essentials allows "up to 4 steps per flow". Standard and Premium allow "up to 200 steps per flow, multiple branching points, and more."

SMS: SMS is an add-on. You sign up for a paid plan, then apply to add it.

Main limit: With four steps and no branching listed on Essentials, a branched post-purchase or win-back sequence needs Standard or above. Our Klaviyo vs Mailchimp comparison covers where each one makes sense.

Attentive

Fits: Brands where SMS carries a big part of revenue and who'd rather agree a tailored plan than self-serve.

Pricing: There's no public price. Attentive's pricing page says its pricing "is tailored to your business needs based on your message volume, subscriber list size, number of channels, and AI products selected." It describes the model as usage-based pricing with no credit system.

Channels: The page lists SMS, RCS, email and push, and says you can "Send both triggered emails and full ESP campaigns".

Main limit: You can't price it without a sales conversation, so you can't compare it side by side until you have a quote.

Postscript

Fits: Shopify brands that want SMS in a specialist tool, next to the email platform they already use.

Pricing: Postscript's pricing page lists Starter at "$0/mo." with a "$49 monthly minimum spend" and "$0.009/SMS, $0.045/MMS + Carrier fees", Growth at "$100/mo." with "$0.008/SMS", and Professional at "$500/mo." with "$0.007/SMS". Enterprise is custom. The page says the listed rates are for the US and Canada only.

Features: Every plan includes a "Visual Flow Builder with built-in Automation templates" and "Advanced segmentation using your Shopify data and third party integrations".

Main limit: Postscript's pricing page says email is here but lists it behind a waitlist. Until you have access, plan to run Postscript beside an email platform. Our guide to SMS marketing for eCommerce covers what to send before you price it.

How do the pricing models differ?

Each platform counts something different, and that decides which one is cheaper for you.

Klaviyo: Profiles and email sends on one plan, with SMS on a separate Mobile Messaging plan. Its help centre says the Profiles and Email plan "must cover your active profile count", or you're moved to a plan that does at the next billing cycle.

Omnisend: Billable contacts, with a monthly email cap on Standard and unlimited emails on Pro.

Mailchimp: Contact tiers, with a send limit set as a multiple of your contacts and overages above it.

Attentive: A tailored quote based on volume, list size, channels and AI products.

Postscript: A monthly plan fee or minimum spend, plus a rate per message and carrier fees.

A worked example with the published limits

Take a made-up store with 500 contacts. The plan limits are the real ones from each pricing page. Omnisend Standard includes 6,000 emails a month, which is 12 emails per contact. Mailchimp Standard's limit is 12 times your contacts, also 6,000. Mailchimp Essentials is 10 times, so 5,000.

Now say the store sends one campaign to everyone three times a week. That's 156 campaigns a year, or 13 per contact a month, before a single flow email goes out. It's already over the cap on both Standard plans. The store needs Omnisend Pro with unlimited emails, a bigger Mailchimp tier, or overages.

So send frequency moves the bill as much as list size does. Price each platform at your real contact count and your real monthly sends, not at the headline number.

Stay on Klaviyo if

Your revenue leans on segments built from order history. Repeat buyers of one category, VIP tiers by lifetime spend, win-back by time since last order. In the accounts we run, this is where Klaviyo earns its bill.

Your flows are built and working. A migration means rebuilding every flow, template and segment, then proving the new ones perform as well. That's a real cost, and it only pays off if the new platform adds something.

You want email and SMS in one account. Klaviyo sells SMS as a Mobile Messaging plan in the same account, next to your Profiles and Email plan.

The bill is high because of dead profiles. Fix that before you move. Run a sunset flow, suppress the profiles that don't respond, then pick the lower tier before your cycle renews.

How do you switch without losing revenue?

Price at your real numbers. Pull the count of contacts you can email, your monthly sends, and your SMS volume by country. Enter them in each vendor's calculator.

Map every live flow first. Write down each trigger, filter, delay and message before you export anything.

Carry consent exactly. Move unsubscribes, suppressions and SMS consent records as they are.

Keep the old flows on. Leave them running until the new ones are live and tested, then switch them off one at a time so no customer gets both.

Move one channel at a time. Move email, prove it, then move SMS. If you move both at once, you can't tell which change caused which result.

Judge it on gross profit. Take flow and campaign revenue, multiply by your gross margin, and subtract the platform bill and the cost of running it. Compare that number before and after the move.

When this does not apply

You're pre-revenue or your list is tiny. Klaviyo, Omnisend and Mailchimp all have free plans capped at 250 profiles or contacts. At that size, the platform isn't your problem.

The problem is the program. If your flows are thin and your segments are basic, a new platform won't fix that. Start with an email marketing audit instead.

Only SMS needs to change. Keep Klaviyo for email and compare SMS tools on their own. Klaviyo bills SMS on a separate Mobile Messaging plan, so the email side of your bill stays as it is. If you run two tools, make sure they share unsubscribes, suppressions and SMS consent, so no customer gets the same message twice or hears from you after opting out.

Does Hayes Media only work in Klaviyo?

No. Hayes Media works in Klaviyo for most accounts and has experience in most other email and SMS platforms, so a brand that isn't on Klaviyo is still a fit. If staying where you are is the better call, we'll say so and build the program there.

Hayes Media runs email and SMS retention for eCommerce brands: email, SMS, loyalty programs and subscribe-and-save programs, as a complete engagement on its own. Our retention site, email.hayesmedia.co, states "Trusted by 50+ eCom brands" and "8 yrs Retention expertise". Those figures and our case studies are published by Hayes on its own site, and we don't have a third-party review profile or a Klaviyo partner listing, so weigh them accordingly.

Hayes Media typically works with brands doing at least $100K per month in revenue. That's a guideline, not a gate: a smaller brand with a clear budget set aside to scale and real order volume already qualifies. One-time email projects start from $2,000 USD, and retainers for ongoing full management start from $4,000 USD per month, scoped on the discovery call.

If you're comparing agencies as well as platforms, our list of the best Klaviyo agencies puts Hayes Media first, because we wrote it.

Want a straight answer on whether to switch?

Book a discovery call and we'll audit your current platform: what you pay at your real profile count, the flows that are live, the segments you can and can't build, and whether a move would add gross profit or just cost you a rebuild. No onboarding fees. No lock-in contracts. No junior marketers.

Sources

Klaviyo pricing. Source for the free plan limits and the active profile definition.

Klaviyo help centre: How Klaviyo bills customers. Source for active profiles, the profile-compliant plan rule, and Mobile Messaging as a separate plan.

Omnisend pricing. Source for plan prices, contact and email limits, SMS rates, billable contacts, support and migration.

Mailchimp pricing. Source for plan prices at 500 contacts, send limits, overages, flow steps and the SMS add-on.

Attentive pricing. Source for how Attentive prices and the channels it offers.

Postscript pricing. Source for plan prices, per-message rates, US and Canada rate scope, plan features, and the email waitlist.

Hayes Email and Retention. Source for the Hayes retention figures quoted above, which Hayes publishes itself.