Rats and mice continue to cause serious problems in Swedish homes. With milder winters and an increasing number of open green spaces, rodents are finding their way into basements, garages, attics and storage rooms – sometimes without any warning.
The results of this year's major rat repeller comparison are in. And it's a Swedish-developed model that takes the top spot.
Repello Rat Repeller is Top-ranked 2025, having outperformed the competition in effectiveness, coverage and long-term performance.
"We have developed a way to simulate acute threats through sound for the rat. It's not about volume – it's about influencing the subconscious with the right type of signals so that the rat flees," says Örjan Johansson, Professor of Technical Acoustics at Luleå University of Technology and research director.
Repello is this year's most reliable rat repeller
The test compared models from Repello, Isotronic, Gardigo, Tomcat, Soveco and PestRepeller, looking at how they perform in real-world spaces: along walls, in attics, basements and storage rooms – the places where rats are most active.
The results showed significant differences.
Several models lose effectiveness when ultrasound is blocked by walls or furniture. Some also emit a single constant tone, which rats quickly get used to.
Repello stands out by using varied bioacoustic signals – sounds that mimic rodents' own alarm calls. The technology was developed in collaboration with researchers from Luleå University of Technology and has since been evaluated by the Swedish University of Agricultural Sciences (SLU).
This means rats cannot adapt to the signals. Instead, they leave the area and continue to avoid it going forward.
"Our technology recreates the rats' own alarm signals. It triggers their instinctive flight response, and it's impossible for them to resist," says Professor Örjan Johansson.
According to the Bäst i Test Guide panel, the difference was clear:
"Top-ranked is the Repello Rat Repeller, which combines documented effectiveness, reliable coverage and modern ultrasound technology. It is a safe and sustainable choice for anyone who wants to get rid of rats in walls, basements, storage rooms and other spaces without poison or traps. A dependable choice for both homes and outbuildings."
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"It didn't take long before the traces were gone"
Roger and Ann in Luleå are one of many couples who have noticed the situation getting worse in recent years.
After a major renovation, scratching noises suddenly started coming from their attic.
"It was like a nightmare. We had never had rats before," says Roger.
They tried traps and pest control, but the problem kept coming back. It wasn't until they installed Repello that they felt back in control.
"It was just plug and play. We haven't seen a single rat trace since," he says.
"It's an enormous relief," adds Ann
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Why more people are choosing Repello
Unlike traditional rat traps and rat poison, Repello is completely non-toxic, silent and safe to use in homes with both children and pets.
The technology requires no monitoring – it works around the clock, keeping rodents away in a natural way.
It has also been developed for European conditions, where rats move through small gaps, along facades and walls – the exact spaces where Repello has shown its strongest results.
How Repello works
- Mimics the rats' own alarm signal
- No effect on humans or pets
- Silent, discreet and easy to install
- Developed and tested in Sweden
Summary: This year's standout test winner
After the test panel evaluated performance, coverage, long-term effectiveness and ease of use, the conclusion was clear:
Repello is the most effective and reliable choice of 2025.
For anyone who wants to get rid of rats without poison, without traps and without hassle, the Swedish test winner is the option that stands out the most.
👉 Learn more about Repello here!
