The Superhuman email client requires users to request access to the application on the Superhuman website that asks them a series of questions about their preferred work flow and habits regarding email. After being granted access to use the Superhuman email client, the user will completed a mandatory videoconference tutorial about how to use the application. The Superhuman email client uses the users existing email accounts and only works with Gmail and Google G Suite emails (as of June 2019).
The Superhuman email client has an official 100ms rule for the speed of everything a user does when using Superhuman, and the company claims their email client is the fastest in the world. Superhuman allows users to gain insights using social media integration (LinkedIn, Facebook, and Twitter) about the people they are emailing such as: what they look like, where they are located, and what they are doing for work. Their email client allows users to pick the time their email is sent, see when their messages have been read , and un-send emails for any reason such as a change in plans or noticing of a typo. Superhuman uses artificial intelligence to sort emails based on a users perception of which emails are most important to them.
On May 1, 2019 Superhuman completed their series B funding round with $33 million of funding from Andreessen Horowitz (lead investor), First Round Capital, and Boldstart Ventures. At the time of receiving their series B funding Superhuman was valued at $227 million with onlyfewer than 15,000 customers. David Ulevitch, a partner at Andreessen Horowitz, commented on why the company is valued at such a high price in relation to their number of customers by saying: "Superhuman is the future of work. Once I started using Superhuman, I couldn't conceive of relying on anything else."
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