How do I test different brand names and slogans for free?
Create an online survey that you beta test or just send them out to your friends to get their feedback. I have created many slogan/taglines over the years and have never paid anyone to give me their feedback. It starts with a good feeling that you have picked a good one and then you bounce it off of a few people to get their feedback. Bounce something off 10 people and you will get the general idea of whether it is a winner or a loser.