In the United States, the startup landscape is bustling with activity, with new ventures launching daily. However, many falter due to a lack of insight from successful companies that have risen to the top. To address this, we've compiled a list of 300 renowned and rapidly expanding startups in the United States that have caught the attention of investors.

1. Airmeet:
   
   Based in Delaware, Airmeet offers an all-in-one event platform featuring virtual social lounges and summits, founded in 2019 by Lalit Mangal, Manoj Singh, and Vinay Kumar Jasti.

2. Gopuff:
   
   Originating from Pennsylvania, Gopuff is a digital delivery service app offering a range of products, founded in 2013 by Rafael Ilishayev and Yakir Gola.

3. Calendly:
   
   Headquartered in Georgia, Calendly provides an automated scheduling service to streamline communication, founded in 2013 by Tope Awotona.

4. Outreach:
   
   Seattle-based Outreach offers sales interaction software utilizing artificial intelligence for forecasting, established in 2014 by Andrew Kinzer, Gordon Hempton, Manny Medina, and Wes Hather.

5. Thrasio:
   
   Founded in Massachusetts in 2018 by Carlos Cashman and Joshua Silberstein, Thrasio is a digital consumer products company acquiring Amazon FBA businesses.

6. Drift
   
   Boston-based Drift aims to enhance business purchases through seamless and humanized conversations, founded in 2015 by David Cancel and Elias Torres.

7. Transmit Security:
   
   Transmit Security, based in Boston, provides risk management and passwordless identity solutions, established in 2014 by Mickey Boodaei and Rakesh K. Loonkar.

8. RoadSync:
   
   Atlanta's RoadSync offers a logistics-focused digital payment software platform, founded in 2015 by Akmann Van-Mary, Ryan Droege, and Spencer Barkoff.

9. Novo
   :
   Miami's Novo delivers digital banking services tailored for small business owners and freelancers, founded in 2016 by Michael Rangel and Tyler McIntyre.

10. Flyhomes:
    
    Seattle's Flyhomes is a real estate brokerage platform assisting customers throughout the home-buying process, founded in 2016 by Stephen Lane and Tushar Garg.

These startups showcase the diverse and innovative landscape of entrepreneurship in the United States, offering solutions across various industries with the potential to reshape markets and drive growth.