Mark Rober has about 86.3 million YouTube subscribers, 31.4 million more than Sierra & Rhia FAM, as of Nov 13, 2026. At the 30-day pace, Sierra & Rhia FAM would not catch up.
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Mark Rober, with about 86.3 million YouTube subscribers to Sierra & Rhia FAM's 54.9 million, a gap of 31.4 million as of Nov 13, 2026.
Never at the current pace. Mark Rober is growing faster than Sierra & Rhia FAM over the last 30 days, so the gap widens by about 66.3K subscribers a day.
Over the last 30 days, Mark Rober gains about 87.8K subscribers a day and Sierra & Rhia FAM gains about 21.6K subscribers a day.
