Klaviyo x inMobile: Your strongest marketing stack in 2025

Klaviyo is strong for email and automation, while inMobile is built for SMS with full control over price and high delivery reliability.

Since Klaviyo opened for SMS in Denmark, many webshops are faced with a more complex choice: Should you put everything in one platform (best-of-suite) or use the best tool for each channel (best-of-breed). Our clear recommendation is the latter - let Klaviyo handle marketing emails and send SMS through inMobile.

This provides three tangible benefits: better cost control, faster and more stable delivery during peak periods, and the flexibility e-commerce requires - while Klaviyo remains your single source of truth (all data in one place) via inMobile's Klaviyo integration.

This article explains the possibilities and limitations of SMS in Klaviyo, why best-of-breed often works best in practice, and how to connect inMobile and Klaviyo in minutes (without any code).

What is Klaviyo?

Klaviyo is an American marketing automation platform where you can, for example, send email campaigns and set up automatic flows.

For webshops, Klaviyo typically acts as the "engine" for email. When you pair Klaviyo with inMobile, you can use your Klaviyo lists and segments to send SMS in inMobile because your data is synchronised between the systems in real-time (approximately every 5 minutes).

The advantage of this is that you still see the behaviour in Klaviyo: for example, clicks on SMS links are registered as events in Klaviyo and unsubscribes are automatically kept synchronised across channels. This makes Klaviyo your single source of truth, while the SMS broadcasts are delivered via inMobile.

Technically, you can connect Klaviyo and inMobile in two ways: via the direct integration (great for campaigns) or via webhooks in Klaviyo's flow builder (great for automatic flows). We'll dive deeper into both solutions later in the article.

Limitations for SMS in Klaviyo

Although Klaviyo can send SMS in Denmark, the platform is primarily built for email. This has some limitations, especially in terms of price, speed and flexibility. price, speed and flexibility - especially if your SMS volume fluctuates. And that can cost your ROI.

Here are the most important things you should be aware of.

• More expensive price per SMS
• Auto-upgrade or stopped campaigns
• Wasted credits = wasted money
• Hard to hit consumption
• Less flexibility
• Speed
• Range of coverage
• Support
• Limited features

More expensive price per SMS

At Klaviyo, SMS is settled using monthly credits that are converted into SMSes. For most people, this means a higher average price per SMS. At Klaviyo, the average SMS price is DKK 0.40-0.57 per SMS. With inMobile, you instead have a fixed price per SMS sent - in Denmark it is typically DKK 0.259-0.279 per SMS.

For example, if you send 10,000 SMSes a month, the savings with inMobile will typically be around DKK 1,495 - and it increases as the SMS volume increases.

Auto-upgrade or stopped campaigns

If you've suddenly used up all your credits, you can ask Klaviyo to automatically upgrade your account to a larger package. However, you should be aware to downgrade this package again next month if your need for SMS broadcasting is not as high here. This is important as credits cannot be transferred from month to month - and that can be expensive.  

If you don't use auto-upgrade, Klaviyo will instead stop all your broadcasts - both SMS campaigns and automations. If you don't pay attention, you risk losing revenue.

Wasted credits = wasted money

If you don't use all your credits one month, they cannot be transferred to the next month, nor can they be refunded. Instead, your credits just go to waste. This means you've wasted money and paid an even higher price per SMS.

Read what The Last Bottle thinks about Klaviyo's SMS pricing model.

Hard to hit consumption

Because Klaviyo uses this pricing model, you should try to guess your SMS usage for the coming month as accurately as possible to choose the right package. This can be difficult, partly because an SMS only contains 160 characters, and if these characters are exceeded, the transmission counts as two SMS messages.

If you don't know the exact content of your campaigns in advance, the maths suddenly becomes very difficult.

Less flexibility

When you have to pre-select your package month by month, a lot of the flexibility that many people love about the SMS channel disappears. The ability to write and send an SMS campaign very quickly on days when sales might be a little slow or something unexpected happens in the organisation.

When you only pay for texts sent, you can be more spontaneous and react the same day - without 'guessing' next month's usage.

Speed

When things are busy - such as new drops, sales or Black Week - speed and stable delivery are crucial. SMS is not Klaviyo's core product. As a result, there are also some technical limitations that mean Klaviyo's delivery speed is significantly slower than inMobile (8 min vs. 48 sec) - especially during peak periods.

This difference can affect the performance of your SMS campaigns.

Global reach

Klaviyo only supports SMS to 21 different countries(August 2025), including Denmark. inMobile, on the other hand, supports SMS in +200 different countries globally. If your organisation sends text messages across borders, this is obviously something you need to be aware of.

Support

Support is important - both when things get tough and when doubts or questions arise in everyday life. At Klaviyo, your level of support depends on the country you operate in and the package you have chosen with them.

At inMobile, you get good Danish support every day, and we can be reached by phone, email and live chat.

Limited features

Klaviyo's SMS product is still relatively new and features are limited. That's why experienced partners like Texta also point out that inMobile is more "everyday-robust". Here you'll find features such as virtual number, keywords and auto-blacklisting.

Hear what marketing agency Texta thinks about Klaviyo's new SMS solution.

Why split your marketing channels (best of breed)?

When building your marketing stack, the choice is often between investing in an "all-in-one platform" or "the best tool for every need". The latter is called Best-of-breed strategy and is gaining popularity.

That's because this strategy gives you more control, better scalability and fewer compromises - without losing sight of the big picture, as long as the systems can talk to each other.

Below you'll find what we believe are the most important reasons to choose specialised marketing systems to solve your tasks.

Specialisation leads to better results

It's hard for one platform to be equally strong in everything. Instead, when each tool does what it does best, you typically get higher quality on each channel.

Email platforms are of course optimised for email campaigns and often also automations and data reporting. Dedicated SMS gateways are optimised for SMS - including speed of delivery, flexibility, scalability and control over your sending.

Flexibility

With best of breed, you can swap out a single component if needs or prices change - without moving your entire setup. You avoid getting stuck with one supplier and can choose the features that fit your business now.

Economy that follows consumption

When each channel has its own billing, you can optimise per channel instead of paying for "packages" where some features are not used. This allows for better budget management, especially in channels (like SMS) where volumes can fluctuate greatly month to month.

Data overview without compromise

Best of breed doesn't necessarily mean data chaos. With a clear data model (single source of truth = all customer data in one place), you can still let one system take care of your overall view while other systems send data to it. Of course, this requires that the right integrations are set up.

When it comes to Klaviyo and inMobile, our recommendation is clear: Keep Klaviyo as your email engine, but let inMobile handle the secure delivery of your SMS messages - and remember to create an integration between the two. It's the most flexible, the most stable and ultimately the cheapest.

Read more in the article: Understand the differences between inMobile and Klaviyo.

How to integrate inMobile and Klaviyo

There are two ways to connect inMobile and Klaviyo so your email and SMS strategy can work effectively together.

1. inMobile direct integration: The first solution is to integrate your inMobile account directly with your Klaviyo account. With this solution, you can create SMS campaigns in inMobile based on lists, segments and data from Klaviyo that syncs to inMobile.

2. Webhooks for SMS: The other solution is to use a webhook in Klaviyo. With a webhook, you can embed SMS directly into Klaviyo's flow builder along with your emails. This is a great feature for those who want to combine email and SMS in their marketing strategy.

Direct integration

Integrating inMobile and Klaviyo is easy and you can do it directly from your inMobile account. See how to do it in the video below.

Go to Guide: Create Klaviyo integration.

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Webhook

The other way you can use SMS in Klaviyo is by building SMS directly into your favourite flow. Just as you would build an email flow in Klaviyo, you can also build SMS flows (or flows with both SMS and email) using webhooks.

Go to: Guide: Create Klaviyo Webhook

Who should (still) choose Klaviyo for SMS?

This is rarely our recommendation, but there are scenarios where it may make sense to leave SMS in Klaviyo. This is true if you consciously prioritise "all in one platform" over price and flexibility.

Low and stable usage - and you accept a higher price
If your SMS volume is small and fluctuates minimally month-to-month, the credit model can be acceptable, although the effective price per SMS is typically higher than pay-as-you-send. This requires that you can live with unused credits not being refunded or transferred - and that you actively manage upgrades/downgrades yourself to avoid wastage.

One platform trumps flexibility
If working in one tool is most important to your team - even if it means less flexibility - Klaviyo could be the right choice. Be aware that credits need to be predicted monthly, that auto-upgrade can continue into the next month, and that broadcasts (also flows) stop when the cap is reached until you upgrade.

For most webshops, the combination - email in Klaviyo, SMS in inMobile - will result in lower costs, less waste and more freedom of action in practice. Of course, you know best what's right for your business.

Converting SMS campaigns with inMobile and Klaviyo

When you combine inMobile's SMS broadcasts with Klaviyo's customer data, you can execute fast and targeted without losing track. This is a strong foundation for effective SMS campaigns.

Below are 3 examples of how you can utilise inMobile and Klaviyo for SMS marketing.

Example 1: Retargeting

Retargeting is communication aimed at recipients who have previously had contact with your organisation. For example, they may have visited your website, bought some of your products or clicked on one of your adverts.

The SMS channel is an effective way to get in touch with that group of potential customers and get them (re)activated. Do it with a one-off SMS campaign or create an automatic flow that sends an SMS every time a contact is added to your specific list.

Example 2: Welcome message

Do you have a customer club or newsletter? Then you should welcome new contacts. It confirms that the enrolment has gone through and establishes a good relationship from the first contact.

Ideally, such a message should be sent automatically so that the customer quickly receives relevant info from you without you having to manually check for new sign-ups. You can do this via an SMS flow in inMobile or a webhook in Klaviyo if you want to follow up with an email.

Example 3: Targeted campaigns

Targeted campaigns are all about knowing your customers - and then targeting your campaigns accordingly. For example, if you know their date of birth, you can send a small gift their way on the big day.

You can also look at other parameters such as the customer's typical repurchase cycle, favourite categories or whether they live close to your physical store.

The above are just a few examples of how inMobile and Klaviyo can be used together to send highly targeted SMS messages to the right customer segments.

Find more SMS inspiration in the inMobile inspiration catalogue.

Summary: inMobile vs Klaviyo

Klaviyo's launch of SMS has caused a stir in the market. This is good, and at inMobile we welcome the increased focus on SMS, but encourage you to familiarise yourself with your options.

Klaviyo is primarily built for email, which presents some challenges on the SMS side: the price is high, delivery is slow, flexibility is lacking and SMS features are limited.

Fortunately, your choice doesn't have to be either-or. The solution we see working best in practice is both-and. Let inMobile handle SMS, Klaviyo handles email - and let the integration ensure that the two systems work together and your data is collected in one place.

Do you have any further questions about the integration or how to send SMS in Klaviyo? You are always welcome to call us on +45 88 33 66 99 or send an email to [email protected]