Steam units sold: 402M (2019) → 704M (2024), up 21% in 2024 alone.
Steam peak concurrent users: 3.52M in January 2011 → 42,042,778 on January 11, 2026. Roughly twelvefold, directly measured from Valve's API.
Valve's own disclosed number, which isn't an estimate by anyone: between August 2024 and August 2025, Steam averaged 109,000 people making their first ever purchase every day. That's about 40 million brand-new paying customers in one year.
Games released on Steam: ~8,100 in 2019 → 20,282 in 2025.
Steam gross revenue: $4.5B (2019) → roughly $16.9B (2025).
Some of the best selling games did come out roughly 15 years ago, but that's because they've been selling consistently ever since. Like Minecraft, the Witcher, etc.