Mark Rober

Rober spent approximately nine years as a mechanical engineer at NASA's Jet Propulsion Laboratory, where he worked on the Curiosity Mars rover. He later joined Apple before transitioning to full-time content creation and founding CrunchLabs.

CrunchLabs is an engineering-toy education company Rober founded, built around a monthly subscription called the Hack Pack that ships hands-on build kits to subscribers. He scaled the business through 2023–2024, positioning it as both a direct-to-consumer product line and an extension of his on-channel engineering education content.

The Hack Pack is CrunchLabs' flagship monthly subscription box, delivering engineering and science build-it-yourself kits aimed primarily at younger audiences. Rober uses his YouTube channel to demonstrate and promote the kits, creating a tight loop between content and commerce.

Launched in March 2024, #TeamWater was a charity fundraising campaign Rober organized to support global clean water access. The campaign raised over $40 million, marking one of the largest single fundraising drives associated with a YouTube creator.

In March 2025, Rober published a video testing Tesla's camera-only Autopilot system in scenarios designed to probe its object-detection limits, drawing comparisons to the cartoon character's oblivious cliff-running. The video sparked significant public and industry debate about the trade-offs between camera-only self-driving and Lidar-equipped alternatives.

The Glitter Bomb series is Rober's recurring project in which he engineers booby-trapped fake packages to deter and expose porch pirates. He released the latest installment in December 2024; the series has become one of the most recognizable recurring formats on his channel.

Confirmed recent partners include T-Mobile (YouTube, November 2025), Adobe (Instagram, April 2026), and CrunchLabs as an owned-brand placement (YouTube, October 2025). His deals cluster in tech, telecom, and education-adjacent verticals consistent with his engineering-focused content.

As of mid-2026, Rober's YouTube channel carries approximately 77.6 million subscribers, making it one of the largest science-and-engineering channels on the platform. Total cross-platform followers, including Instagram and TikTok, exceed 84 million.

Rober's headline engagement rate of 2.2% on YouTube sits above the roughly 1.5% median for the engineering-and-science education category. His TikTok engagement runs higher still at 7.7%, though that platform represents a smaller share of his total audience.

YouTube growth remains positive at roughly 1.9% over the most recent 30-day window, a healthy clip for a channel already in the high-double-digit millions. Instagram growth has flattened and TikTok is broadly static, suggesting YouTube continues to be the primary engine for audience expansion.