Klarna On‑Site Messaging

I don't leave negative reviews often, but after this experience I think other Shopify merchants deserve the warning.

I've spent weeks trying to get Klarna connected to my store. Shopify support confirmed my Merchant ID is valid and active on their end, so the problem sits with Klarna's own integration. The app fails to connect with an error every time.

Every time I've contacted Klarna support, the response has been automated: a bot sending links to generic setup documentation. None of it addresses a connection error with an already-confirmed Merchant ID, because it's all written for someone setting up the app for the first time, not someone whose setup is already failing. I've explained this repeatedly and gotten the same doc links back each time. No human has actually looked at the error.

So now I'm stuck in a loop: Shopify says the integration is Klarna's to fix, and Klarna's support system won't route me to a person who can fix it. Weeks in, still unresolved, still no reply from an actual human being.

If you're considering Klarna for your store, know that the moment something doesn't work as expected, you're on your own with a chatbot. I wouldn't build a checkout dependency on a payment provider whose support layer can't handle a problem that isn't in their FAQ.

Doesnt work well for me. I want to use a variant of 1 widget (it was 3 variations) but for some reason i can't get is set correctly.... it keeps displaying 2 different type of variations every time i check. Asked for help @ klarna but won't help me....

Great way to advertise Klarna monthly payment plan on product page. Works nicely and automatically with Shopify Payments Klarna payment method. Took one star off as it lacks the ability to change if the text for the placement "credit-promotion-auto-size" is left, center or right. By default it is at center but for our store text to the left would've resulted in cleaner look.

The app is not working, it worked in the beginning and now it does not anymore.

Great app.

Although it has 1 (local) minor issue: the currency symbol is shown after the slided price, which isn't the default location for our currency (€).

Is it possible to manually change this position? For example:

Current on-site message: Betaal in 3 delen van 43,00 €
Prefered on-site message: Betaal in 3 delen van € 43,00

son unos impresentables, llevo mas de un mes diciendo que necesito cambiar la cuenta y no hay forma envie 400 correos , 3000 llamadas y no son capaces de cambiar la cuenta ni de bloquear los pagos. Me deben mas de 4 pagos ya que les llevo avisando mas de un mes.

Do not waste your time. The application was working with some errors, for example it did not appear if the product was more than 1500 euros. But it was working. Suddenly it has disappeared from the web. In the template it appears but then it does not appear on the web. The application tells me that I have vintage mode but I have a 2.0 theme. Has anyone been able to contact support to fix anything it is impossible. Anyway run away while you can.

UPDATE:
Since writing the review below, I have now had further communication and a solution from Klarna. The app was installed twice; once within Shopify, and again within the Klarna Portal. No idea how or why that happened as they appear as one and the same to thing to a new user with no previous experience, but this was causing my issue. I was contacted by Nicole from Klarna support after reading my review below. I'm glad it is sorted but frustrated that I had to waste time with 2 agents over chat, (who did not give a solution) and then write a review, just to get the help required. It was actually very simple to fix if only you knew it was an issue in the first place. But I appreciate Nicole reaching out and taking the time to understand the problem, and following up with clear instructions that resolved my problem.
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As others have reported, there is clearly an issue with this app and Shopify. I've followed all instructions and still can not get the thing working. When support eventually respond, it's a standard robotic line of 'we can see you have successfully connected your store...' - Which is true, but it is not displaying the Klarna on site-messaging, and therefore it is not working. No assistance, you just get pointed you back to the instructions.
very disappointing service from what should be a great solution.

And please do not reply stating it's working, its not. It's connected, but not working.

I should have taken heed of the other 1-star reviews. I almost never leave reviews, but in this case, I feel I have to - to help others avoid wasting time and energy.

Despite spending over 4 months actively trying to integrate Klarna with my Shopify store - including countless emails, troubleshooting steps, and back-and-forth with support - the experience was one of the most frustrating and unproductive I’ve encountered. Despite countless emails, screenshots, and explanations, the app never functioned properly - and support continuously offered surface-level responses without resolving the issue.

The app lacks clarity, error messaging is non-existent, and the support process is incredibly inefficient.

I’ve removed Klarna from my store and will moving to another provider. I strongly recommend others avoid this app unless you’re prepared to spend months troubleshooting with little to no progress.

Same experience as other users: the app doesn't work and the customer is nowhere to be found. Opened a ticket 8 days ago...

The app used to work on our store, but wouldn't translate for German customers. We were advised to reinstall it, which completely broke it.