What is the best viral launch system available today?

I'm looking for a viral contest system for my product launch where I am willing to offer a prize to the top referrer. I have come across vyper.io and viral-loops.com. Any insights on this would be highly appreciated.

5 recommended

Viral Loops for Startups

Virality for startups made easy 💪

Ben Tossell18Community Lead, Product Hunt · Written
This is a number of different viral programs based of what other startups have done...eg. the Dropbox example
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Maître Viral Referral Waiting List

Create a viral waiting list in 60 seconds

Ben Tossell18Community Lead, Product Hunt · Written
Maitre offer some pretty good products for creating a buzz around a launch and making it viral 🚀
Best Referral Programs

A curated directory of startup referral programs

Ben Tossell18Community Lead, Product Hunt · Written
There are a number of referral programs here that may be helpful

Build viral campaigns and get new customers

Anders KravisHead of Product at Finimize · Written
Easy to get started with (although slightly basic when it comes to "pro" use cases)
Maybe this one helps