Omnisend vs. Klaviyo: Which Platform Scales Better for Fast-Growing Businesses?

Both Omnisend and Klaviyo are major players in the email marketing space for ecommerce businesses. They mostly differ in terms of the depth of what they offer, which is why it’s important to clearly define what you need from the platform to avoid overpaying for features you won’t use.

If your business is scaling quickly, you likely need to consider automation capabilities, omnichannel marketing, the platform’s learning curve, pricing, and customer support. While both platforms are quite capable and competitive in these areas, each has its pros and cons.

Automation and workflow capabilities

Based on the latest data, email automations drive significant revenue for ecommerce stores. In 2025, they represented just 2% of email sends, but drove 30% of revenue.

Pre-built templates help you get started quickly, while customization options allow you to fine-tune campaigns to your needs as your business grows.

Omnisend has a wide selection of pre-built automations that cover the customer journey almost completely. You can choose between welcome series, abandoned cart sequences, browse abandonment flows, cross-sell campaigns, birthday messages, and more. Additionally, you can then customize them however you want.

Klaviyo also provides a library of pre-built automations, including specialized flows like price drop alerts and back-in-stock notifications. Once you set them up, you can also customize their contents and settings to your liking.

As your contact list grows, you may need to think about more personalized automations. Both platforms allow you to confidently segment your audience within automations by selecting trigger filters, audience filters, and more. It ensures the right message reaches the right audience at the right time.

Both Omnisend and Klaviyo are excellent from this point of view.

SMS marketing aspects

SMS marketing is especially useful for quick, urgent nudges that must be opened and seen. It has an average conversion rate of 21% – 30%, as opposed to email’s 12.04%.

Omnisend supports SMS globally, so regardless of where you operate or scale, it is most likely supported in your region. You can easily leverage SMS marketing alongside your email campaigns (both manual and automated) to get the best results from your marketing efforts.

Klaviyo operates in only 18 countries for SMS, so if you’re growing into markets outside of those 18, you’ll most likely need a different SMS provider. It automatically comes with managing multiple platforms and losing the unified customer view.

While it doesn’t matter for US-only brands, it becomes a factor if you’re considering going global, making Omnisend better suited for scaling or global brands.

Which platform has a steeper learning curve?

Most email platforms are relatively easy to use in the beginning, when all you need are core workflows and 1 weekly newsletter to your entire list. But once the business scales, you need to truly learn the ropes and focus on more complex workflows.

Omnisend is a growth-focused platform that keeps in mind scaling businesses’ needs. Once you get to the point where complex segmentation and automations are required, the AI segment builder comes in handy. If you grew from a 500-contact list to 10,000, you don’t need to manually sort the contacts out.

You can type in “VIP customers who haven’t purchased in 30 days”, and get that audience built instantly. It works on all plans (including free), and helps you create campaigns faster as volume increases.

Reports are also filled with necessary data, but they’re made to be easy to understand without the overlying complexities usually associated with analytics. The dashboard allows you to take away actionable insights for your next campaign without having to hire a data analytics team to understand or interpret them.

Klaviyo’s interface assumes you’ll invest time trying to master the complexity. It does come with deeper data and analytics than Omnisend, but it’s only useful for teams that have their own dedicated data scientists to unlock it fully, and it is usually overkill for most growing businesses.

If deep data expertise is a crucial component of your success, and you have the time and resources to access it, then Klaviyo is the better choice. But if you’re a growing business that needs a well-rounded platform with easy-to-understand, actionable insights, Omnisend is the more logical choice.

How does support accessibility compare?

Fast growth can sometimes result not only in more revenue, but also more questions and technical difficulties. Waiting for 24 hours may not be ideal if something breaks during your biggest sale of the year.

Omnisend provides 24/7 live chat and email support on all plans, including free accounts. Small and growing businesses get the same access as enterprise customers. Response times average under three minutes for live chat. As you grow further and upgrade to the “Pro” plan, you can also get a dedicated account expert at $400 MRR, if needed.

Klaviyo restricts free users to 60 days of email support, then cuts them off entirely. If you’re on a paid plan, you do get 24/5 support access for live chat, and 24/7 for email, but the waiting time varies from a few minutes for live chat, and 1-2 days for email. Additionally, full weekend support requires upgrading further to professional plans.

Scaling businesses, especially those operating on tight margins, may face unnecessary friction with Klaviyo’s customer support accessibility and delays. For better support, choose Omnisend.

Can you manage multiple stores in one account?

This one is especially important for agencies, but some businesses launching different brands may also benefit from it. When your business starts to scale from several clients to tens, or even hundreds of clients, having a platform that makes it easy to handle multiple stores with a single login becomes essential.

Klaviyo requires separate accounts for each store, which means juggling multiple login details, rebuilding workflows for each brand, and maybe even hiring more people to manage disconnected accounts.

Omnisend, on the other hand, allows you to manage multiple stores from one account. When you add a new client or launch a new brand, you can connect it in minutes and natively copy-paste your best templates and workflows across all stores.

If you have an abandoned cart sequence that works wonders every time, you don’t need to manually rebuild it again. All it takes is a few clicks to copy the automation to your new store.

It’s a critical component when your business is scaling, as you don’t need to waste time rebuilding everything from scratch. From this perspective, Omnisend wins.

Omnisend vs. Klaviyo: Verdict

Omnisend scales better for most fast-growing agencies or ecommerce businesses because it removes unnecessary operational friction. It provides convenient management of multiple stores from a single account, global SMS marketing on all plans, and an excellent 24/7 support team that answers in minutes regardless of how much you pay.

Klaviyo is a better option for those who focus more on data and analytics, and has a dedicated team of data scientists to make the most of it. It provides advanced segmentation and predictive analytics that give you the absolute deepest level of insights into your campaigns and audience. It does, however, come with a steep learning curve that most modern businesses don’t need.

Choose Omnisend if you’re scaling fast with a small team and need a reliable platform that will grow with you, both locally and globally. Also, when it comes to analytics, Omnisend is more than capable of giving advanced, actionable data without overcomplicating it, which is enough for most growing businesses.