Popular open-source API client he started in 2014 and sold to Kong in 2019.
diff ~/p/gregory-schier ~/p/martin-donadieu
Gregory Schier vs Martin Donadieu
Products, revenue & stack compared side by side.
Gregory Schier vs Martin Donadieu at a glance
Both Gregory Schier and Martin Donadieu are bootstrapped solo founders and build in public. They overlap in Developer Tools and Open Source Makers. Gregory is based in Canada, Martin in Portugal. Gregory started in 2014 and Martin in 2021. Gregory Schier has 5 products listed on IndieMakerList vs Martin Donadieu's 3. Gregory has sold 1 product. On revenue, Gregory self-reports $20K MRR (Insomnia, before its 2019 sale) and Martin $30K MRR (as of 2026). They share 1 tool in their stacks: TypeScript. On X, Gregory has about 7.4K followers and Martin about 12K.
Side-by-side comparison
- Based in
- Gregory Schier: Canada
- Martin Donadieu: Portugal
- Started
- Gregory Schier: 2014 (12 yrs indie)
- Martin Donadieu: 2021 (5 yrs indie)
- Revenue (self-reported)
- Gregory Schier: $20K MRR (Insomnia, before its 2019 sale)self-reported, as of 2019 · source for Gregory Schier's revenue
- Martin Donadieu: $30K MRRself-reported, as of 2026 · source for Martin Donadieu's revenue
- Products listed
- Gregory Schier: 5
- Martin Donadieu: 3
- Product status
- Gregory Schier: 4 active · 1 acquired
- Martin Donadieu: 3 active
- X followers
- Gregory Schier: 7.4K
- Martin Donadieu: 12K
- Categories
- Gregory Schier: Developer ToolsOpen Source MakersMac & Desktop App Makers
- Martin Donadieu: Open Source MakersDeveloper ToolsMobile App MakersSaaS Founders
- Style
- Gregory Schier: solobootstrappedbuilds in publicexited
- Martin Donadieu: solobootstrappedbuilds in public
- Courses & resources
- Gregory Schier: —
- Martin Donadieu: 2
Revenue figures are self-reported by each maker and not audited; dates and scope differ. Highlighted categories are shared by both.
Top products
Yaak
yaak.app
Local-first, Git-friendly desktop API client for REST, GraphQL, gRPC, WebSocket and SSE, free for personal use.
Kabook
kabook.app
Book tracker and reading log for iPhone, iPad and Android.
Pakratt
pakratt.com
Packing-list app that learns from every trip what you took and forgot.
Capgo
capgo.app
Open-source live update (OTA) platform for Capacitor apps, shipping fixes without app store review.
Captime
captime.app
Workout timer app for CrossFit and high-intensity interval training, the app whose update problems led to Capgo.
Naturopia
naturopia.xyz
Eco co-housing village and wellness spa project on the island of Madeira.
Tech stack
1 shared tool, marked with ★: TypeScript. See the indie maker tech stack.
How they build
- Self-employment is a lever: choose to work for more time, not just more money.
- Keep developer data local and in plain files instead of a proprietary cloud.
- Strong word of mouth from users matters more than early metrics.
- Build the tool you need yourself when the old one stops fitting.
- Build open source and stay free of venture capital.
- Scratch your own itch, then let the community shape the product.
- Share numbers and the journey openly.
Learn from Gregory and Martin
No courses, books or communities listed.
- [podcast] Solos
- [podcast] Indie Makers (French)
Gregory Schier vs Martin Donadieu FAQ
Who makes more money, Gregory Schier or Martin Donadieu?
Gregory Schier self-reports $20K MRR (Insomnia, before its 2019 sale) and Martin Donadieu self-reports $30K MRR (as of 2026). By these self-reported figures, Martin Donadieu's reported monthly revenue is higher. Figures are unaudited and may cover different periods or businesses, so treat them as rough indicators.
Who has built more products, Gregory Schier or Martin Donadieu?
Gregory Schier has 5 products listed (including Insomnia, Yaak and Kabook); Martin Donadieu has 3 products listed (Capgo, Captime and Naturopia).
What tech stack do Gregory Schier and Martin Donadieu use?
Gregory Schier uses Rust, Tauri and TypeScript. Martin Donadieu uses Capacitor, Supabase, TypeScript and Vue. Tools they have in common: TypeScript.
Where are Gregory Schier and Martin Donadieu based?
Gregory Schier: Canada. Martin Donadieu: Portugal.
Who has been an indie maker longer, Gregory Schier or Martin Donadieu?
Gregory Schier started in 2014 (12 years indie); Martin Donadieu started in 2021 (5 years indie).
Are Gregory Schier and Martin Donadieu bootstrapped?
Yes, both are listed as bootstrapped founders on IndieMakerList.
Full profiles
Read the full story, timeline and links on Gregory Schier's profile and Martin Donadieu's profile.