Will ETIAS be similar to US ESTA?

Yes, since the ETIAS visa application form has similar objectives to the American ESTA (Electronic System for Travel Authorisation, part of the Visa Waiver program).

ETIAS is designed to pre-screen visa-exempt travelers who wish to enter the Schengen Area, while ESTA pre-screens those who travel to the US. Other similarities might include resemblance in the travel authorization forms such as the personal, passport and past visa information, currently required when completing an ESTA form. Questions regarding criminal, educational and employment history might also be asked.