# Armin Ronacher
Building since 2010. Not reviewed by Armin.
Page: https://mrrmaker.com/@arminronacher
Released Flask (2010), co-founded Earendil (2025)
In their words: "Software developer and Open Source nut. Creator of the Flask framework. Founder of @earendil-works." (github.com)

## Numbers
- Products: 8
- Building since: 2010

## Products
- Earendil (2026 →): running
- Flask (2010 →): running
- Jinja: dates not stated in any source
- Click: dates not stated in any source
- Sphinx: dates not stated in any source
- Werkzeug: dates not stated in any source

## Timeline
- Oct 2026: Earendil: Pi 1.0 reached the top of Hacker News, past 1,000 points [stated]
- Oct 2026: Earendil: Shipped Pi 1.0 [stated]
- Jul 2026: On Local First Conf, Berlin, talk: Reflections on building cloud and local hybrid machine entities [stated]
- Apr 2026: On The Pragmatic Engineer Podcast, "Building Pi, and what makes self-modifying software so fascinating" [stated]
- Apr 2026: On AI Engineer, London, talk: The Friction Is Your Judgment [stated]
- Apr 2026: Earendil: Acquired the Pi open source project and opened Lefos in public alpha [stated]
- Mar 2026: On PyAI, San Francisco, talk: Leaning In To Find Out [stated]
- Jan 2026: Launched Earendil [stated]
- Apr 2025: On PyCon Austria, talk: Do Dumb Things [stated]
- Jul 2024: On EuroPython 2024, talk: The Catch in Rye [stated]
- Oct 2020: On Evrone interview with the creator of Flask [stated]
- Aug 2016: On PyBay 2016, talk: Flask for Fun and Profit [stated]
- Jun 2016: On Podcast.__init__, episode 63 [stated]
- May 2015: On Talk Python To Me, episode 13: Flask web framework and much, much more [stated]
- Mar 2011: On Pycon Atlanta 2011, talk: Opening the Flask [stated]
- Apr 2010: Launched Flask [stated]

## How sure
8 verified by someone other than Armin, 46 stated by Armin in public, 0 outdated. Read on 11 Oct 2026.

## Sources
- About Me | Armin Ronacher's Thoughts and Writings, lucumr.pocoo.org: https://lucumr.pocoo.org/about
- Projects | Armin Ronacher's Thoughts and Writings, lucumr.pocoo.org: https://lucumr.pocoo.org/projects
- github.com: https://api.github.com/users/mitsuhiko
- Talks | Armin Ronacher's Thoughts and Writings, lucumr.pocoo.org: https://lucumr.pocoo.org/talks
- I’m Leaving Sentry | Armin Ronacher's Thoughts and Writings, lucumr.pocoo.org: https://lucumr.pocoo.org/2025/3/31/leaving/
- Rye Grows With UV | Armin Ronacher's Thoughts and Writings, lucumr.pocoo.org: https://lucumr.pocoo.org/2024/2/15/rye-grows-with-uv/
- Earendil, earendil.com: https://earendil.com
- Announcing Pi & Lefos | Earendil, earendil.com: https://earendil.com/posts/announcing-pi-and-lefos/
- A Reflection on our Announcement Today | Earendil, earendil.com: https://earendil.com/posts/announcement-reflection/
- An Invitation to Begin a Correspondence | Earendil, earendil.com: https://earendil.com/posts/invitation/
- Pi 1.0 | Earendil, earendil.com: https://earendil.com/posts/pi-1-0/
- Changes — Flask Documentation (3.1.x), flask.palletsprojects.com: https://flask.palletsprojects.com/en/stable/changes/
- Welcome to Flask — Flask Documentation (3.1.x), flask.palletsprojects.com: https://flask.palletsprojects.com/en/stable/
- Episode #13 - Flask web framework and much, much more | Talk Python To Me Podcast, talkpython.fm: https://talkpython.fm/13
- Armin Ronacher, pythonpodcast.com: https://pythonpodcast.com/episode-63-armin-ronacher
- Evrone’s interview with Armin Ronacher, Flask framework for Python creator, evrone.com: https://evrone.com/armin-ronacher-interview
- Building Pi, and what makes self-modifying software so fascinating, newsletter.pragmaticengineer.com: https://newsletter.pragmaticengineer.com/p/building-pi-and-what-makes-self-modifying
- Pi 1.0: A.I. Agent From Austria's Developer Scene Tops Hacker News | Trending Topics, trendingtopics.eu: https://www.trendingtopics.eu/pi-1-0-earendil-en/
- 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