Best Science Twitch Channels

Browse Twitch channels by category

Twitch rankings: common questions

Who is the biggest Twitch streamer right now?

NASA tops this ranking with 1.9M followers and an average of 17K concurrent viewers over the last 30 days. The list re-ranks as the numbers move.

How are average and peak viewers calculated?

Twitch does not publish viewership history, so we measure it. Our engine reads the platform's live listings every 15 minutes, records the concurrent viewer count of every channel it finds, and rolls those readings into a daily figure. Average viewers is total hours watched divided by total hours streamed over 30 days - time-weighted, so a 20-minute stream does not count as much as an 8-hour one. Peak is the highest single reading in that window.

Why do some channels show a dash instead of a viewer count?

Because we have not measured them yet. A dash means the channel has not been seen live during our sampling window, which is not the same as having no viewers. Writing a zero there would rank a channel we never measured below one with a single viewer, so we leave it blank until there is a real reading.

What are hours watched?

Viewer-hours: the number of hours of content actually consumed, summed across everyone watching. A channel streaming 4 hours to 500 concurrent viewers delivers 2,000 hours watched. It is the figure sponsors ask for, because it combines audience size with how long a channel actually broadcasts. Across this directory that comes to 416Mh in the last 30 days.

Is follower count a good way to rank Twitch channels?

On its own, no. A follower count is cumulative and never goes down much, so a channel that was popular years ago still carries the number long after the audience left. Concurrent viewers is what advertisers and buyers actually price, which is why this directory sorts by it too.

What does Partner mean next to a channel?

Twitch has no verification badge. Partner is the platform's own top status tier and it gates monetization, so it is the closest equivalent - an Affiliate label marks the lower tier beneath it. We show whichever one the channel holds rather than inventing a tick of our own.