Hello Bar is a SaaS which charges based on the number of clicks the bar receives. If your bar receives 7,500 clicks per month, HelloBar would cost you $50/month. It’s a great service and includes it’s own analytics but many sites will benefit from a simpler option without ongoing fees.
Foobar is my favorite alternative to Hello Bar. $14 is a one time payment at CodeCanyon and it features a powerful customization panel. Customizing colors, font size, shadows as well as social icons and much more. You can save multiple Foobars and assign to to specific pages. It’s great also for occasional ’emergency’ notices also.
Foobar was my favorite, but attentionGrabber is nicely designed visually. The transition effect is smooth. Like Foobar, you add official Twitter and Facebook button next to the post link. So with regards to the backend and in terms of design attentionGrabber is the best.