For now it's completely free, but we will need to find a way to cover costs - premium account for API, bulk submissions, extra features maybe.
Developed our own queueing, distribution, data syncing systems but the core is NCBI's standard, freely available blast executables.

We would love feedback on a new NCBI-BLAST service we are launching today: sky-blast.com

Under the hood it's the same BLAST executable and databases provided by NCBI, with a replica of the NIH's interface - providing an alternative to the US gov service that's less congested, faster & more reliable