# Antoine van der Lee
Building since 2015. Not reviewed by Antoine.
Page: https://mrrmaker.com/@antoinevanderlee
RocketSim MRR $80 (2022) to $4,512 (2024); went indie in 2024
In their words: "Founder of SwiftLee, Indie Dev behind RocketSim" (github.com)

## Numbers
- Revenue: almost $100K ARR, RocketSim (stated · Mar 2026)
- Total revenue so far: almost $25K, From Side Project to Going Indie (stated · Dec 2024)
- Products: 10
- Building since: 2015

## Products
- Swift Concurrency Course (2025 →): running
- From Side Project to Going Indie (2024 →): running
- SwiftLee Weekly (2020 →): running
- RocketSim (2020 →): running
- SwiftLee (2015 →): running
- Video Compressor: dates not stated in any source

## Timeline
- Mar 2026: On RevenueCat's Launched podcast, with Charlie Chapman [stated]
- Dec 2025: Swift Concurrency Course: Completed by over a thousand engineers [stated]
- Sep 2025: On Dev Conversations #14, Swift Toolkit [stated]
- Mar 2025: Launched Swift Concurrency Course [stated]
- Dec 2024: RocketSim: RocketSim for Teams, the business version, first went live [stated]
- Jul 2024: Launched From Side Project to Going Indie [stated]
- Jul 2024: RocketSim: Recommended by Apple as an Essential Developer Tool for App Developers [stated]
- Mar 2024: Decided to leave WeTransfer and become fully independent [stated]
- Jan 2023: Moved to a four-day week at WeTransfer to spend one day a week on side projects [stated]
- Oct 2020: On Indie Dev Monday, issue 14 [stated]
- Mar 2020: Launched SwiftLee Weekly [stated]
- 2020: Launched RocketSim [stated]
- Aug 2019: SwiftLee: Turned SwiftLee into an official company [stated]
- Feb 2019: On Hacking with Swift interview [stated]
- 2019: RocketSim: Built the first version, a deep links tester [stated]
- Mar 2017: Joined WeTransfer as Senior iOS Engineer and Team Lead [stated]
- 2015: Launched SwiftLee [stated]

## How sure
9 verified by someone other than Antoine, 78 stated by Antoine in public, 9 outdated. Read on 11 Oct 2026.

## Sources
- From Side Project to Going Indie | SwiftLee Courses, going-indie.com: https://www.going-indie.com
- A weekly Swift Blog on Xcode and iOS Development - SwiftLee, avanderlee.com: https://avanderlee.com
- About - SwiftLee, avanderlee.com: https://avanderlee.com/about
- github.com: https://api.github.com/users/AvdLee
- SwiftLee 2019 in review: Top Swift Development blog posts - SwiftLee, avanderlee.com: https://www.avanderlee.com/swift/swiftlee-2019-in-review-top-swift-development-blog-posts/
- SwiftLee 2020 In Review: Most read blog posts - SwiftLee, avanderlee.com: https://www.avanderlee.com/swift/swiftlee-2020-in-review/
- Swift in 2021: A Year in Review - SwiftLee, avanderlee.com: https://www.avanderlee.com/general/swift-in-2021-a-year-in-review/
- SwiftLee 2022: A Year in Review - SwiftLee, avanderlee.com: https://www.avanderlee.com/general/swiftlee-2022-a-year-in-review/
- SwiftLee 2023: A Year in Review - SwiftLee, avanderlee.com: https://www.avanderlee.com/general/swiftlee-2023-a-year-in-review/
- Going Indie: From Side Project to Going Independent, avanderlee.com: https://www.avanderlee.com/general/from-side-project-to-going-indie/
- SwiftLee in 2024: Lessons learned and achievements - SwiftLee, avanderlee.com: https://www.avanderlee.com/general/swiftlee-in-2024-lessons-learned-and-achievements/
- SwiftLee in 2025: A full year as an indie developer - SwiftLee, avanderlee.com: https://www.avanderlee.com/general/swiftlee-in-2025-a-full-year-as-an-indie-developer/
- Introducing RocketTrace: Using Xcode Instruments with AI Agents - SwiftLee, avanderlee.com: https://www.avanderlee.com/ai-development/introducing-rockettrace-using-xcode-instruments-with-ai-agents/
- Swift Newsletter for iOS Developers | SwiftLee Weekly, swiftlee-weekly.com: https://swiftlee-weekly.com
- About SwiftLee Weekly and Antoine van der Lee, swiftlee-weekly.com: https://swiftlee-weekly.com/about
- Build Apps Faster - RocketSim, rocketsim.app: https://rocketsim.app
- Pricing - RocketSim, rocketsim.app: https://www.rocketsim.app/pricing/
- Find Performance Problems in Xcode Instruments Traces — RocketTrace, rockettrace.app: https://rockettrace.app
- Video Compressor for iPhone | Shrink Videos Privately, videocompression.app: https://videocompression.app
- About Antoine van der Lee | Video Compressor, videocompression.app: https://videocompression.app/about/
- About Stock Analyzer — Methodology, Data Sources & Team, stock-analyzer.app: https://www.stock-analyzer.app/about/
- Going Indie with Antoine van der Lee, going-indie.com: https://podcast.going-indie.com
- Swift Concurrency Course: Transition to Swift 6.4, swiftconcurrencycourse.com: https://www.swiftconcurrencycourse.com
- Dev Conversations #14: Antoine van Der Lee @ SwiftToolkit.dev, swifttoolkit.dev: https://www.swifttoolkit.dev/posts/dc-antoine
- “Solve time, and they’ll pay you” | RevenueCat, revenuecat.com: https://www.revenuecat.com/blog/growth/antoine-van-der-lee-rocketsim-launched-podcast-2026
- Interview: Antoine van der Lee – Hacking with Swift, hackingwithswift.com: https://www.hackingwithswift.com/articles/180/interview-antoine-van-der-lee
- Issue #14 - Antoine van der Lee and Matthias Gansrigler | Indie Dev Monday, indiedevmonday.com: https://indiedevmonday.com/issue-14
- Site checks on 2026-10-11, MRRMaker: https://mrrmaker.com/how-it-works#checks

Labels: "verified" means confirmed by someone other than the founder; "stated" means the founder said it in public. Method: https://mrrmaker.com/how-it-works