For LoRa, check out Multitech, LinkLabs, and Libelium. Semtech has a development board, too, though it would need to be paired with a microcontroller. Warning that most of this stuff is not for the faint of heart -- you need to be ready to dive into datasheets, bring up radio drivers, etc.

For Sigfox, if you're not in an area with a Sigfox network, there's not much you can do. But TI has some killer FSK dev boards. http://www.ti.com/tool/smartrftrxebk and http://www.ti.com/tool/cc1101cc1190emk915

Ingenu has radio modules and dev boards, but I don't think they're set up to sell single-unit quantity.

If you're in San Francisco, we're making a going to be distributing dev boards that will work out of the box and come with a bunch of sensors. Just sign up on our website: www.beepnetworks.com