These guys are trying hard to hide their identity. No business name or address. No SSL cert. Anonymously registered domain in Panama. Hosted by a telecom in Sweden. Nothing in Google, Facebook, or LinkedIn.
The "Privacy" page gives a hint. It gives a contact address of "contact@ymal.io". "ymal.io" just redirects back to "taste.io". But WHOIS gives some info for "ymal.io". It's registered to [redacted].
That location is a 5-story building, but the most likely location is Spark Labs, which is a co-working space.[1] $550 a month for a desk. And, yes, "ymal.io" is listed as a member of Spark Labs.[2] So, if you need to find them, that's where to look.
[1] http://www.desksurfing.net/desks/1045-spark-labs [2] http://spark-labs.co/members/