On the comparison table top is Mintos which I have previously registered and invested 100 EUR for testing purposes. This happened in October 2017. Since that time, the registration process has not changed much but in this post I will show a step by step guide on how to do that.
1) Get registered via this affiliate link: Mintos registration extra 1%
This will give you 1% bonus on all investments you make for next 90 days. Because this is an affiliate link, I would also get the same 1% bonus from your investment +5 EUR for your registration. Read more here. I have missed 1% opportunity back in the day when I started.