The Soylent company claims its vegan product (the powder – not the oil blend) is kosher certified, and the powder's manufacturer does mention Star-K, but does the powder actually have a hechsher – Star-K or other?
Feb 2015 Update
From Star-K on Facebook:
Due to product reformulation, Soylent 1.4, a dietary supplement, manufactured by Rosa Labs, Los Angeles, CA, is no longer certified by Star-K. Previous versions of the Soylent product remain certified.
As of 2021, all products in Soylent's "Ready To Drink" product line are certified kosher by the OU: source on the OU website. (This does not include their "Complete Energy" energy drinks.) However, Soylent Powder is not certified, and has not been since 2015.
It isn't listed on the Star-K's website, and from the way your links present the representation of Kosher it may be that the company is buying Kosher product but not itself receiving certification for their own packaging. It could also be that it is listed on the Star-K's website under a corporate name that is different than the brand name, or that the website information is not up to date.
The issue with the company saying they are packaging Star-K certified product without themselves having the certification is that you only have the company's representation that this is what they are doing, and that should not be construed as Star-K certification in the generally understood sense. CYLOR.
Yes, the powder is certified by the Star-K*:
FW: Question about Rosa Labs
Fri, Jun 27, 2014 at 10:43 AM
Yes, the powder is certified by us.
Rivka Leah Goldman
Database Support Specialist
122 Slade Avenue
Baltimore, MD 21209
443 334 0137
* Even if the Star-K symbol is not on the label. (Source: Followup question.)