Here are some U.S. events that offer start-ups a host of opportunities in terms of motivation, education, financial support and exposure.

Startup World Cup
$1 million grand investment prize. startupworldcup.io.

G-Startup Worldwide
Regional competitions; Global Final Competition grand prize winner gets $250,000 investment.
g-startup.com/

PITCH: The Battle of the Startups
Open to startups exhibiting that have received under $3 million in funding to date and have not had a discernible change in business model in the previous three years. collisionconf.com/startups/pitch

HATCH
Pitch competition for tech start-ups. hatchpitch.com/#applications-open

U.Pitch Competition & Showcase
Elevator pitch competition for students. Prize pool of $10,000.
futurefounders.com/contact/

TechCrunch Disrupt Startup Battlefield Competition
Winner gets $50,000 prize.
techcrunch.com/event-info/disrupt-sf-2018/

SXSW Accelerator Startup Competition
Company pitches. sxsw.com/apply-to-participate/sxsw-accelerator/

For some competitions limited to specific locations or ethnic/cultural groups:
gusto.com/framework/business-basics/the-ultimate-list-of-startup-competitions-hackathons-more/