OnlySim compares all Dutch SIM only deals with Superpower. This new BigSpark initiative aims to help consumers save money on their monthly phone bills by comparing the offer of SIM only deals in an independent and transparent manner.

Visit →

Monthly visitors
Unique monthly visitors
Monthly pageviews

OnlySim gives customized advice to consumers via the website, telephone and social media. All Dutch providers are taken into account and actual prices, deals and conditions become clear directly.

Based on your preferences, like the number of minutes or MBs, or by using our own personal aid tool which helps you to define your preferences, a custom made advice is given. This tool and the search technology of OnlySim have been tuned by de telecom experts of BigSpark.

Peter Geurts, director of BigSpark: “The launch of OnlySim fits our ambition to help consumers to make better decisions. We share our expertise and use smart tools to give a custom-made advice.”

Comparing with five guarantees

Consumers who use the comparison tool of OnlySim can count on a transparent and independent purchase advice. We promise you five guarantees on which you can count on as a visitor of OnlySim:

  1. Independent: the advice we give is 100 percent independent. We are transparent about the way we compare the deals;
  2. Always up to date: Everyday, we make sure that the most up-to-date prices, deals and specs are visible;
  3. Complete: We have collected the largest offer of SIM only deals of all of our competitors in the Netherlands;
  4. Reliable: Our comparison is objective. The best offer is always shown first;
  5. Personal: Our telecom experts are always available to help you and to give custom-made advise


There is a significant shift going on in telecommunications in the Netherlands. SIM only deals keep getting more popular. In 2013 only eight per cent of the Dutch chose for such a subscription, while in 2015 no less than 37 percent chose a SIM only deal. 62 percent of them said that their choice for a provider was mainly based on the extent to which they could save money on their monthly phone bill.

OnlySim wants to help consumers and business users to compare the price and provider of a SIM only deal in a clear and honest manner. Furthermore, OnlySim offers the unique possibility to extend the deal you have with your current provider with an even better deal.


The target audience of OnlySim is divers. Consumers as well as business users know where to find us. OnlySim is optimized for mobile use, which is paying off: half of our visitors find us via their mobile device.

User research

Through Feedback Company we conduct an ongoing and independent investigation into the usability and reliability of OnlySim: check our reviews.


At the moment we are working on some pretty interesting cases. We hope to show them to you very soon. In the meantime, don’t hesitate to contact us and hear about all the advertising possibilities.

Be inspired bij our cases.

Cases will be available soon.

Rate card

Please contact us if you want to be included in our comparison engine. Transactions are settled based on cost per sale.


At the moment there are no additional advertising possibilities on OnlySim.

Contact us

You can reach BigSpark during working hours by phone or via our contact form.

Call +31 (0)24 7370191 or go to contact →

Want to advertise?

Reach your audience with a targeted campaign. We like to think along with you to get the most out of your marketing budget.

Take a look at our advertising possibilities →