Grams is a search engine for Tor based darknet markets launched in April 2014. The service allows users to search multiple markets for products like drugs and guns from a simple search interface.
The services uses a custom API to scrape listings from several markets such as Alpha Bay and others, to return search listings. The site is described by the Global Drug Policy Observatory to have “transformed how people search the hidden web”.
In May 2014 the site added Gramwords, a service similar to Google’s AdWords search sponsorship system for vendors. Additionally their profile system allows for cross-market vendor contact details and reviews to be held centrally.
Later that year in June the creators released Grams Flow, a clearnet to Tor redirection service serving various dark net sites and in November, a banner advertising network for Tor sites, Tor Ads which has not yet had much success.
‘Info Desk’ allows central content and identity management for vendors, reducing the complexity of around maintaining presences on multiple markets.
In June 2014 Grams released Helix, a market payment service with an integrated bitcoin tumbler. Before the coins are mixed they are also traded out for new ones. The site is also available on the clearnet via Grams Flow.