Competition is growing in the enterprise Twitter market: Austin-based start-up QikCom, which announced its closed beta launch today, adds some fresh ideas to the concept that won competitor Yammer the top prize at TechCrunch50., a third company in the enterprise micro-blogging space, launched a week after Yammer’s win last month. Erick Schonfeld at TechCrunch has the story today on the horse race between the three companies.

Each service allows employees to micro-blog about their work projects, and all have one major improvement over Twitter: the enterprise market provides a business model. But not all three companies are taking the same tack. Yammer charges companies who want administrative control over their Yammer accounts, but QikCom is offering that service for free, and instead adopting a model similar to the iPhone app store and charging for features called tabs. charges companies according to their size, with 15 users costing $14 a month and 100 costing $99 a month.

Which company do you think has the best shot at success? Let us know in the comments section. 

I interviewed Yammer CEO David Sacks at the TechCrunch conference after his presentation, and republished the interview above.

Kelsey Blodget, Associate Producer