Losant - Losant makes building connected experiences and solutions easy.
dweet.io - Ridiculously simple data sharing for the Internet of Things.
Hologram.io - Cellular IoT connectivity that powers innovation
AskSensors - The easiest IoT platform
Cisco Jasper - Jasper provides a SaaS IoT platform to enable companies of all sizes to launch, manage and monetize IoT services on a global scale.
ThingSpeak - Open source data platform for the Internet of Things. ThingSpeak Features