lemlist
lemlist.com
Cold email and multichannel sales outreach platform with personalization and deliverability tools.
diff ~/p/guillaume-moubeche ~/p/justin-duke
Guillaume Moubeche vs Justin Duke
Products, revenue & stack compared side by side.
Founder of Buttondown, the bootstrapped newsletter platform he started at Stripe
@jmduke United States
Guillaume Moubeche vs Justin Duke at a glance
Both Guillaume Moubeche and Justin Duke are bootstrapped. They overlap in SaaS Founders, Marketing & SEO Tools and Creators & Writers. Guillaume is based in Paris, France, Justin in Richmond, United States. Guillaume started in 2018 and Justin in 2016. Guillaume Moubeche has 6 products listed on IndieMakerList vs Justin Duke's 2. On revenue, Guillaume self-reports ~$40M ARR (lempire) (as of 2025) and Justin ~$15K MRR (as of 2022-12). On X, Guillaume has about 25K followers and Justin about 5.6K.
Side-by-side comparison
- Based in
- Guillaume Moubeche: Paris, France
- Justin Duke: Richmond, United States
- Started
- Guillaume Moubeche: 2018 (8 yrs indie)
- Justin Duke: 2016 (10 yrs indie)
- Revenue (self-reported)
- Guillaume Moubeche: ~$40M ARR (lempire)self-reported, as of 2025 · source for Guillaume Moubeche's revenue
- Justin Duke: ~$15K MRRself-reported, as of 2022-12 · source for Justin Duke's revenue
- Products listed
- Guillaume Moubeche: 6
- Justin Duke: 2
- Product status
- Guillaume Moubeche: 6 active
- Justin Duke: 1 active · 1 shut down
- X followers
- Guillaume Moubeche: 25K
- Justin Duke: 5.6K
- Categories
- Guillaume Moubeche: SaaS FoundersMarketing & SEO ToolsCreators & Writers
- Justin Duke: SaaS FoundersMarketing & SEO ToolsCreators & Writers
- Style
- Guillaume Moubeche: bootstrappedserial maker
- Justin Duke: bootstrappedbuilds in public
- Courses & resources
- Guillaume Moubeche: —
- Justin Duke: —
Revenue figures are self-reported by each maker and not audited; dates and scope differ. Highlighted categories are shared by both.
Top products
lemwarm
lemwarm.com
Email warm-up tool that improves deliverability before outreach campaigns.
lemcal
lemcal.com
Scheduling and booking-link tool for sales teams.
Taplio
taplio.com
LinkedIn content and growth tool, acquired by lempire.
Buttondown
buttondown.com
Simple, developer-friendly email newsletter platform for writers and publishers.
~$15K MRR
Service that tracked changes people made to their social media profiles and bios.
Tech stack
No tools in common in their publicly listed stacks. See the indie maker tech stack.
No stack shared publicly.
DjangoPythonVueHerokuPostmarkStripe
How they build
- Bootstrap to profitability and stay in control.
- Build a personal brand and community to fuel distribution.
- Use profits, not investors' money, to buy and build new products.
- Pick boring, familiar technology so you can focus on the product.
- A side project can compound for years before it needs to become a full-time job.
- Stay profitable and self-funded rather than relying on outside capital.
- Publish openly about how the business is going, including annual reviews.
Guillaume Moubeche vs Justin Duke FAQ
Who makes more money, Guillaume Moubeche or Justin Duke?
Guillaume Moubeche self-reports ~$40M ARR (lempire) (as of 2025) and Justin Duke self-reports ~$15K MRR (as of 2022-12). By these self-reported figures, Guillaume Moubeche'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, Guillaume Moubeche or Justin Duke?
Guillaume Moubeche has 6 products listed (including lemlist, lemwarm and lemcal); Justin Duke has 2 products listed (Buttondown and Spoonbill).
What tech stack do Guillaume Moubeche and Justin Duke use?
Guillaume Moubeche hasn't shared a stack. Justin Duke uses Django, Python, Vue, Heroku, Postmark and Stripe. They don't list any tools in common.
Where are Guillaume Moubeche and Justin Duke based?
Guillaume Moubeche: Paris, France. Justin Duke: Richmond, United States.
Who has been an indie maker longer, Guillaume Moubeche or Justin Duke?
Guillaume Moubeche started in 2018 (8 years indie); Justin Duke started in 2016 (10 years indie).
Are Guillaume Moubeche and Justin Duke bootstrapped?
Yes, both are listed as bootstrapped founders on IndieMakerList.
Full profiles
Read the full story, timeline and links on Guillaume Moubeche's profile and Justin Duke's profile.
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