List of companies involved in quantum computing or communication

As of my last knowledge update in October 2023, numerous companies are involved in quantum computing and quantum communication. These companies range from startups to established tech giants, and they are engaged in various aspects of quantum technologies, including hardware development, software, consulting, and quantum algorithms. Here is a list of some notable companies in this field: ### Tech Giants 1. **IBM** - Pioneering quantum computing hardware and software with IBM Quantum.