In a statement, the company said it would replace Google for users in the US, the UK and Canada; replace Qwant in France; and DuckDuckGo in Germany. More countries are to be added in the future.
He quit Mozilla in April 2014 after a mob took exception to his having donated $US1000 (A$1329) to Proposition 8, a California move to define marriage as being between a man and woman, in 2008.
Existing users of Brave can switch their search engine to Brave Search by going to the Settings menu. Users of other browsers can also use the Brave search engine.
“Brave Search has grown significantly since its release last June, with nearly 80 million queries per month. Our users are pleased with the comprehensive privacy solution that Brave Search provides against Big Tech by being integrated into our browser,” said Eich, chief executive and co-founder of Brave.
“As we know from experience in many browsers, the default setting is crucial for adoption, and Brave Search has reached the quality and critical mass needed to become our default search option, and to offer our users a seamless privacy-by-default online experience.”
The announcement also said Brave was launching the Web Discovery Project, "a privacy-preserving system for users to anonymously contribute data to improve Brave Search coverage and quality, and its independence and competitiveness against Big Tech alternatives".
"The WDP is a strictly opt-in feature and protects user privacy and anonymity by design, so that contributed data cannot be linked to individuals or their devices, and cannot be linked together for a user or set of users; this prevents deanonymisation," the company added.