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About our sources

A thousand websites.
But how many homes?

A big number sounds reassuring, especially if you don't want to miss a home. Yet a list of web addresses does not tell you how many different rental homes are behind it.

What you come across along the way

The promise in pictures.

Big source counts. Exact counters. Sometimes even the promise that you will always be first. These are examples of how services present what they offer.

A big number should come with answers.

What is being counted? How many different homes does it add up to? What does a fast alert mean for your reply? The promise is where those questions start, not the answer.

1500+ rental sites scanned automatically. Always be the first to reply without searching.
Reach and speed“1500+ rental sites”
“Always be the first to reply”
Text fragment: It started with an €80 subscription I didn't want to pay.
Too expensive, so they built their own“It started with an €80 subscription I didn't want to pay”That service of their own now costs € 34.99.

Clippings from promotional copy. The numbers and promises shown belong to the providers concerned.

What counts?

More addresses do not
automatically mean more homes.

An estate agent can have its own website, be on a property portal and share listings on Instagram as well. Count those places separately and the list of sources gets longer. The number of different homes does not have to grow with it.

That is why we look beyond the web address. Are there actually homes for rent? Can they be found elsewhere too? Does this source add anything for someone looking for a home?

One home on ten sites is still one home. One with an excellent PR department, mind you.

Automate your search. We scan 1000+ rental websites to find your ideal home.
Websites as the yardstick“We scan 1000+ rental websites”
1,000+ estate agents in one overview. Scanned for new homes every 2 minutes. Direct links to the original source.
Estate agents as the yardstick“1,000+ estate agents in one overview”

What we came across

We have a list like that too.
We went through it.

Well over a thousand entries. There were useful rental sites among them, but also referrals to platforms already on the list, websites with only homes for sale and sites that no longer worked.

We even came across a domain that had since become a casino site. Exciting as well, but it won't get you a viewing.

In our check we saw homes for rent at about six in ten entries. Two dropped out. Two needed a closer look. That is what we found at the time of checking; it says nothing about how many homes are available today.

So a long list is a start. The value lies in checking, following and making it useful.

An exact number
Headline: 1,037 estate agents, one search.
“1,037 estate agents, one search”
Text fragment: was missing. So I built a program that automatically tracks one site. More and more were added. There are now 1,037 of them.
“There are now 1,037 of them.”
Cut-off text fragment with Moving is stressful and more than 1000+ websites.
A partial clipping“more than 1000+”

What it comes down to

You don't need to know every site.
You want to know when something comes up.

Even a few hundred providers are more than you can keep up with yourself all day. The tricky part is that you don't know when something new will appear. That is where OpenSein helps.

We do not count social media as extra sources. In our check, what was shared there had usually appeared earlier with a provider or on a platform. We would rather follow where the listings come from.

On our status page we show how many requests our system makes per day. That is how we make the activity of our technology visible. The number of requests is not a count of unique homes.

An alert that is actually useful to you.

That is what we build OpenSein for.

How OpenSein works

Partly cut-off text with get more homes and 1,500+ reliable sources.
More homes promised“1,500+ reliable sources”