One of the most difficult problems that humanity will face in the 21st century is being addressed by the fast expanding science of quantum computing. According to IBM, a typical supercomputer would need a week to solve a challenging problem. In 2021, the market for quantum computing is expected to be worth about $554.6 billion. It is anticipated to reach $4.7 trillion by the end of 2029, growing at a compound annual growth rate of 31.2%. The attention of major organizations like Amazon, IBM, and Microsoft is growing as they look to quantum computing as a potential answer to their most challenging business problems. Amazon even has a lab dedicated to quantum solutions. The most fascinating and cutting-edge quantum computing startups are listed here.