10M monthly readers in a year (+free tool)

How Upworthy grew to 10.4 million monthly readers in its first year?
They posted old articles with new headlines.
And in order to find the most viral one, they A/B tested 25 headlines for each article.

But the hardest part is actually coming up with enough interesting headlines for A/B testing.

I’ve just found an awesome free tool that will help you do that: Kickass Headline Generator (sumo.com/kickass-headline-generator/)

Love headlines it suggests!