Today, SendHub launched its Android application, upgrading the business communication app to allow unlimited calls and added new features including call forwarding, call transfer, shared groups, and auto attendant.

SendHub graduated from Silicon Valley incubator Y Combinator a year ago with a $2 million check in its pocket — a sizeable amount to get the SMS-based product off the ground. The company billed itself as an SMS service for organizations and has morphed into a social business phone system.

The system works on a variety of devices and includes features such as VoIP calling and voicemail services as well as free SMS and calling. The company also offers simple text messaging and mobile marketing features, allowing business and organizations to broadcast messages to colleagues and customers through group text.

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“Email is not really that medium anymore, it’s just such an overburdened channel. Social media is even worse. It’s often impractical to call people. So that leaves SMS. And nobody has really made SMS serious — and that’s what we do,” SendHub cofounder Ash Rust told VentureBeat last year.

SendHub joins other social business services like Yammer striving to engage and connect the workplace through social tools as networks like Facebook and Twitter permeate our personal lives.

However, some analysts are skeptical of the benefits of standalone social business software. Unproductive noise has begun to fill up the business network, writes entrepreneur Alastair Mitchell, and “useful business conversations that the platform was purchased to foster were made obsolete.”

But with a variety of devices and ways to connect, the growing social business software community could help simplify collaboration in the workspace through idea sharing, file exchange, and integrated communication. The SendHub Android application is the startup’s next step in creating a simple, fast, and reliable communications platform for organizations that want an easier and more social way of staying connected.

Image credit: rbulmahn/Flickr

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