In summary, while Dumbu appears to be professional company with the right credentials, unfortunately, because of how they run their service and their website, they aren't safe to use.
There are a lot of articles and posts on forums out there calling FollowLiker a scam.
Forbes doesn't like Social Upgrade. They group it alongside Instazood, which is a terrible bot.
We also think that their services are genuine and their price points are reasonable – all you need to do is look through their portfolio to discover the kind of reputation they already have. If you're looking for a trustworthy company to work with over your Instagram marketing strategy, we recommend Stellation Media.
You even run the risk of having your account taken entirely by using a bot as simple as this. Avoid.
At the end of the day, we don't think that Social Shark is safe to use. While they've got a couple of features on their website that is essential, they've missed out on too many for us to be even slightly impressed with them.

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