DeCode Genetics says subscribers will be able to assess the likelihood of developing certain diseases.
Customers will be able to see if they are at risk from illnesses such as heart disease and certain cancers, a spokesman for the Icelandic firm said.
Critics condemned the service, saying people could misinterpret the data and become unnecessarily concerned.
"People who buy the service will have the opportunity to look at their genome and compare it to the genomes of those who in the past have been shown to be at particular risk of certain diseases," said Kari Stefansson, chief executive of DeCode Genetics.
"It will also give people an opportunity to put their genome in context of what we know about the genetics of population history," he added.
"So people will be able to figure out where their ancestors came from."
Customers receive an analysis of their genome a few weeks after sending a cheek swab to the company.
clipped from: news.bbc.co.uk 