# Rosie Hoggmascall

> Rosie Hoggmascall is a London-based product and growth expert specialising in subscription apps, monetisation, and product-led growth. With a Cambridge education and a career spanning strategic communications to leading consumer tech startups, she is currently Chief Product & Growth Officer at Fyxer AI - an email productivity tool that grew from $1M to $30M ARR in 2025. She also runs 'Growth Dives', a weekly Substack newsletter delivering annotated product teardowns to 2,000+ subscribers with a remarkable 64% average open rate.

- **Role:** Chief Product & Growth Officer at Fyxer AI
- **Organizations:** Fyxer AI, Growth Dives (newsletter), Perceptycs, Peanut, Ferly, what3words, Kekst CNC
- **Nationality:** British
- **Education:** Not publicly specified, University of Cambridge
- **Known for:** Chief Product & Growth Officer at Fyxer AI during $1M to $30M ARR growth in 2025, 90% month-3 retention achieved at Fyxer AI, Named App Leader 2023 by Business of Apps

## Career timeline

- **2017** — Joined Kekst CNC as Senior Associate, managing strategic communications for FTSE100 clients
- **2019** — Joined what3words as Growth Manager; analysed AB tests using SQL, taught teams about experimentation
- **2020** — Joined Ferly (femtech app) as Growth Lead - first growth hire; built growth process from scratch and monetised the product
- **2021** — Joined Peanut (Series A social app for mothers) as Product Growth Lead; worked across monetisation, activation, and retention
- **2022** — Started writing on Medium, publishing product and UX teardowns that gained a wide audience
- **2023** — Named App Leader 2023 and Top Testing Influencer 2023 by Business of Apps; spoke at App Promotion Summit London; consulted as fractional growth lead for Blinkist, Miro, Thriva, SEMrush
- **2024** — Launched 'Growth Dives' newsletter on Substack (September 2024); continues fractional consulting including work with Fyxer AI
- **2025** — Left Medium after 87 articles, 720K+ views, $11K earnings; joined Fyxer AI full-time as Chief Product & Growth Officer in August 2025; Fyxer grew from $1M to $30M ARR with 90% month-3 retention

## Achievements

- Chief Product & Growth Officer at Fyxer AI during $1M to $30M ARR growth in 2025
- 90% month-3 retention achieved at Fyxer AI
- Named App Leader 2023 by Business of Apps
- Named Top Testing Influencer 2023
- 64% average open rate on Growth Dives newsletter (vs ~20% industry average)
- 2,000+ newsletter subscribers within first year of launching Growth Dives
- 720,800+ total views on Medium across 87 articles
- $11,000+ earned on Medium over 2.5 years
- Spoke at App Promotion Summit London 2023
- Fractional consultant for Blinkist, Miro, Thriva, and SEMrush
- First growth hire at Ferly - built growth function from scratch

## Latest updates

- **2025-08** — Joined Fyxer AI full-time as Chief Product & Growth Officer
- **2025-09** — Growth Dives newsletter celebrated its one-year anniversary with 2,000+ subscribers and 64% open rate
- **2025-09** — Secured first newsletter sponsor, Attio, one week before anniversary
- **2025-08** — Published 'The story behind Fyxer's 90% month-3 retention' on Medium
- **2025-07** — Published farewell piece on Medium after 3 years and $11K earned, citing platform changes
- **2025-01** — Fyxer AI hits $30M ARR milestone with 10% weekly growth since launch

## Links

- Website: https://www.growthdives.com/
- LinkedIn: https://www.linkedin.com/in/rosie-hoggmascall/
- Twitter/X: https://twitter.com/Rhoggmascall

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Profile page: https://yespress.io/rosie-hoggmascall
Published by YesPress — https://yespress.io
Last updated: 2026-04-23