SpaceX (US) has launched 120 satellites and is intending to launch 42,000 in total, 60 at a time twice a month during 2020, It is developing a rocket that can launch 120 at a time. They expect to turn on the first 420 satellites in February 2020.
OneWeb (UK) is planning 5,260 satellites, launching 30 at a time every three to four weeks starting January 2020. Late 2020, it plans to turn the first 300 on.
Telesat (Canada) wants 512 satellites with intent to offer services in 2021.
Amazon is aiming for 3,236 satellites, with offering services when 578 of those are in orbit.
Facebook has plans but is not disclosing its plans.
Roscosmos (Russian Space Agency) is planning for 640 satellites.
Aerospace Science and Industry Corp. (China, state owned) in intending to have 156 satellites in orbit in 2022.
Lynk Global, Inc. (US) is promising a huge global satellite network in 2023.
User devices can be mounted on homes and vehicles and will function as small cells.