It made a very positive impact on my mind at the first look itself. What an interface, looks really great & simple. Coming to service, it apparently looks to me as combination of smsgupshup & twitter! Tagg.in claims itself as SMS group messaging system as well as micro blogging platform. But they are not simply telling like that.

Firstly registration is very easy, you have to fill only three feilds, email, password & verification code (are you human?). You can activate your mobile phone later, but updates via SMS is what looks great. Registration process can also be completed via SMSs. So you need not to have internet to use this service, just remember SMS short codes & their number. Tagg.in uses local number 99801 99801 so you will be less charged by service provider to update via SMS.

After simple registration process, you can create your own group termed as TAGGtivity. Updates to group can be sent using web interface or SMSs. Your followers can follow your updates in either medium. You can subscribe to other popular groups like CricScores, BrkgNews, SportsNews, JokesGuru…etc to get free updates.

Cons:

• You cannot add your friends mobile numbers to your group, they have to sign up or have to send a message from their mobile to follow your updates. SMSGupShup has a feature where you can add mobile numbers of your friends to your group & start sending messages straight away.
• Updates can be made via only two mediums, SMS & web. I still love twitter because it provides lot of ways to update. May be they are going to add these features in final release, this is still in alpha.
• Lack of badges to display your updates on your blogs or web pages.

I feel it still lacks in features when compared with it’s competitor. Let’s wait and see what features they are going to bring in final release.