Losant - Losant makes building connected experiences and solutions easy.

Kaa - Kaa Enterprise IoT Platform is an end-to-end platform for enterprise-grade IoT, Kaa brings you up to speed with a broad stack of modern IoT technologies and, at the same time, gives you flexibility to adapt it all to your specific business domain.

Hologram.io - Cellular IoT connectivity that powers innovation

Mainflux - Mainflux is a secure, scalable, open-source IoT platform written in Go and deployed in Docker. 

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