Thumbtack may be ideal for basic services but it's not for designers, architects or product developers. None of the quotes that come in have any detail - not enough to even estimate a price since the cope of work is lacking. Furthermore most of the inquiries are bogus; most likely bot generated to keep you buying more credits so you don't get any response after quoting.
It's a scam for sure and not for real businesses. Thumbtack is the craigslist for finding a face painter or someone to rake your leaves.
Product or Service Mentioned: Thumbtack Leads.
Reason of review: Not as described/ advertised.