Nimbleway

Bright Data, formerly known as Luminati Networks, is a leading web data platform and proxy service provider. It offers a comprehensive set of tools and services for businesses to collect public web data efficiently and ethically. 
Bright Data's offerings include various types of proxies (residential, datacenter, ISP, mobile), as well as web scraping tools, data collectors, and ready-to-use datasets.

Smartproxy is a proxy service provider established in 2018 that offers residential, datacenter, mobile, and ISP proxies.
They have a large proxy pool with over 55 million IPs across 195+ locations worldwide. Smartproxy provides solutions for web scraping, data collection, ad verification, brand protection, etc.

Oxylabs is a premium proxy service provider offering a comprehensive range of solutions including residential, datacenter, mobile, and ISP proxies.
They focus on providing reliable, high-performance proxies with advanced features for web scraping, data gathering, brand protection, and other use cases. Oxylabs has one of the largest proxy pools in the industry with over 100 million residential IPs.

SOAX is a fast-growing UK-based company that provides businesses with advanced proxy solutions and web data collection tools. Their focus is on delivering efficient, secure, and ethically sourced data extraction capabilities to empower data-driven decision-making.
Their primary services feature residential, mobile, ISP (with US GEO targeting), and datacenter proxies, alongside a web unblocker tool optimized for web scraping.

Webshare, established in 2018 and headquartered in Covina, California. The company specializes in offering a comprehensive range of proxy solutions, including datacenter proxies, residential proxies, and ISP proxies. All of their technology is developed in-house with a focus on cybersecurity and speed. 

Webshare processes over 250 billion unique data points every month to provide a safe and compliant business proxy network. Webshare is a solid choice for those looking for cheap, customizable proxies for use cases like web scraping, multiple account management, etc.