Firstly, I noticed that, as a technically marketing company...
... they have less than 1000 followers on any social network (except twitter, but it's easy to spam follow/unfollow there).
In my eyes, not trust-worthy.
Additionally, I checked their site on whois.com
The domain dates from 1999 so I believe they bought it because of the DA (49).
The above is not good metric for quality, but is my first step ... ALWAYS.
If i was you, I would search through-out their blog to see if their blog posts are good quality and full with good, deeply researched info.
If their blog posts are classic list posts, or curated posts or else, the signs are clear.
If they have original content, deeply researched, full with external links that link to other studies or I don't know what...
... then they probably know what they are doing.
I hope I helped you,