SBIR Land Home › Forums › General SBIR/STTR Question Forum › Difference between Phase I and Phase II? This topic has 1 reply, 2 voices, and was last updated 3 years ago by Lu@EGC. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts at 3:43 pm #101 EricDoesScience67Participant What is the difference between Phase I and Phase II grants? at 7:07 pm #523 Lu@EGCModerator Phase I is the feasibility study, while phase II is the research and development stage to expand Phase I idea/prototype, moving towards commercialization. Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In Log In Register Lost Password