Founded: August 2010 Funding: PubNub has raised $15.5 million in two rounds of financing. PubNub was initially bootstrapped by its two founders, Todd Greene and Stephen Blum, until achieving a 7/24 average of over 100 transactions per second across 40 customers. A Series pubnub leadership A of $4.5 million was completed in early 2012 with funds coming from Relay Ventures and TiE Angels. A Series B of $11 million was closed in the summer of 2013, led by Scale Ventures and including follow-on investments from the Series A investors. Why it’s on this list: PubNub argues that the IoT space is held back by two major obstacles: a lack of reliable communications and security issues. First, while reliable bi-directional signaling for IoT devices is easy in the lab, trying to achieve this in the wild becomes a huge problem, putting at risk the overall success of the deployment. It is very difficult to guarantee device connectivity through corporate and home networks, cell towers, firewalls and variable-speed wireless networks. Second, security is a huge concern. Hackers have successfully attacked numerous highly protected corporate networks.
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