# Felix Krause
Building since 2014. Not reviewed by Felix.
Page: https://mrrmaker.com/@felixkrause
Launched fastlane (2014), acquired by Twitter, then Google (2017)
In their words: "Felix Krause, creator of fastlane […] Co-Founder of ContextSDK, the best way to know when and how to monetize your user." (krausefx.com)

## Numbers
- Products: 12
- Building since: 2014

## Products
- ContextSDK (2023 →): running
- fastlane (2014 – 2015): sold, sold to Twitter
- SunApps (2013 – 2015): shut down
- iOS-factor.com: dates not stated in any source
- Markdown to GitHub style web: dates not stated in any source
- Themoji: dates not stated in any source
- iTanky: dates not stated in any source

## Timeline
- Sep 2024: On Trending Topics podcast: Edge AI, die 2. große KI-Welle [stated]
- Sep 2024: On Subscription League podcast (Purchasely), season 2 episode 1 [stated]
- Apr 2023: Launched ContextSDK [stated]
- Feb 2019: fastlane: fastlane grew from 10 to over 570 integrations, with 922 contributors [stated]
- 2019: Research and development at Root Insurance [stated]
- Jan 2017: Sold fastlane to Google [verified]
- by Nov 2015: Sold fastlane to Twitter [verified]
- Oct 2015: Joined Fabric to work on fastlane full time [stated]
- 2015: fastlane: At Twitter, fastlane grew from about 5,000 to about 75,000 monthly active apps [stated]
- Nov 2014: Launched fastlane [stated]

## How sure
10 verified by someone other than Felix, 55 stated by Felix in public, 3 outdated. Read on 11 Oct 2026.

## Sources
- Felix Krause, krausefx.com: https://krausefx.com
- About Felix Krause · Felix Krause, krausefx.com: https://krausefx.com/about
- Projects · Felix Krause, krausefx.com: https://krausefx.com/projects
- github.com: https://api.github.com/users/KrauseFx
- fastlane is now part of Fabric · Felix Krause, krausefx.com: https://krausefx.com/blog/fastlane-is-now-part-of-fabric
- fastlane is joining Google · Felix Krause, krausefx.com: https://krausefx.com/blog/fastlane-is-joining-google
- Ending my fastlane chapter · Felix Krause, krausefx.com: https://krausefx.com/blog/ending-my-fastlane-chapter
- SunApps - Native iOS & Android Apps · Felix Krause, krausefx.com: https://krausefx.com/blog/sunapps
- ContextSDK - Introducing the most intelligent way to know how and when to monetize your user · Felix Krause, krausefx.com: https://krausefx.com/blog/context-sdk
- ContextSDK - Angel Round, Dieter Rappold joining as CEO, first large customers · Felix Krause, krausefx.com: https://krausefx.com/blog/context-sdk-funding
- iOS Privacy: Announcing InAppBrowser.com - see what JavaScript commands get injected through an in-app browser · Felix Krause, krausefx.com: https://krausefx.com/blog/announcing-inappbrowsercom-see-what-javascript-commands-get-executed-in-an-in-app-browser
- Launching auxcord.org - Let friends queue their music at your party · Felix Krause, krausefx.com: https://krausefx.com/blog/launching-auxcord-let-friends-queue-their-music-at-your-party
- Introducing Overkill - Don't let iTunes interrupt your workflow · Felix Krause, krausefx.com: https://krausefx.com/blog/introducing-overkill-dont-let-itunes-interrupt-your-workflow
- Introducing danger.systems · Felix Krause, krausefx.com: https://krausefx.com/blog/danger
- Introducing WWDC.family · Felix Krause, krausefx.com: https://krausefx.com/blog/introducing-wwdc-family
- Welcoming Fabric to Google - Google Developers Blog, developers.googleblog.com: https://developers.googleblog.com/2017/01/welcoming-fabric-to-google.html
- Google Acquires Twitter Assets Fabric, Crashlytics, Answers, Digits, Fastlane, adweek.com: https://www.adweek.com/digital/google-acquires-twitter-assets-fabric-crashlytics-answers-digits-fastlane/
- Twitter kauft Start-up Fastlane - VOL.AT, vol.at: https://www.vol.at/fastlane-twitter-kauft-start-up-von-21-jaehrigem-oesterreicher/4518098
- Vienna-based ContextSDK secures $4M seed round led by Speedinvest | Vestbee, vestbee.com: https://vestbee.com/insights/articles/context-sdk-secures-4-m
- ContextSDK: Startup von Felix Krause holt 4 Millionen Dollar, trendingtopics.eu: https://www.trendingtopics.eu/contextsdk-startup-von-felix-krause-holt-4-millionen-dollar
- ContextSDK: Felix Krauses neues Wiener Startup launcht mit Angel-Runde, trendingtopics.eu: https://www.trendingtopics.eu/context-sdk-launch/
- Felix Krause - Forbes, forbes.at: https://www.forbes.at/artikel/30u30-2017-felix-krause.html
- Inside the tech evolution: Insights from Fastlane and ContextSDK founder Felix Krause, buzzsprout.com: https://www.buzzsprout.com/1928263/episodes/14426941-inside-the-tech-evolution-insights-from-fastlane-and-contextsdk-founder-felix-krause
- Edge AI: Die 2. große KI-Welle - feat. ContextSDK, trendingtopics.eu: https://www.trendingtopics.eu/edge-ai-die-2-grosse-ki-welle-feat-contextsdk
- Login - AuxCord.org, auxcord.org: https://auxcord.org
- About ContextSDK - The Mobile Context Layer, contextsdk.com: https://contextsdk.com/company/about
- 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