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Corey Haines vs Jakob Greenfeld

Products, revenue & stack compared side by side.

Corey Haines avatar

Corey Haines

SaaS marketer behind Swipe Files, Conversion Factory and the top AI marketing skills repo

@coreyhainesco
Jakob Greenfeld avatar

Jakob Greenfeld

Physicist turned permissionless entrepreneur, co-founder of Sales.co

@JakobGreenfeld Denmark

Corey Haines vs Jakob Greenfeld at a glance

Both Corey Haines and Jakob Greenfeld are bootstrapped, build in public and are serial makers. They overlap in Marketing & SEO Tools, Productized Services and Educators & Course Creators. Both started building independently in 2020. Corey Haines has 8 products listed on IndieMakerList vs Jakob Greenfeld's 8. Jakob has sold 3 products. On revenue, Corey self-reports $1M ARR (Conversion Factory) (as of 2026) and Jakob $90K/mo (Sales.co) (as of 2024). On X, Corey has about 33K followers and Jakob about 23K.

Side-by-side comparison

Based in
Corey Haines: —
Jakob Greenfeld: Denmark
Started
Corey Haines: 2020 (6 yrs indie)
Jakob Greenfeld: 2020 (6 yrs indie)
Revenue (self-reported)
Corey Haines: $1M ARR (Conversion Factory)self-reported, as of 2026 · source for Corey Haines's revenue
Jakob Greenfeld: $90K/mo (Sales.co)self-reported, as of 2024 · source for Jakob Greenfeld's revenue
Products listed
Corey Haines: 8
Jakob Greenfeld: 8
Product status
Corey Haines: 8 active
Jakob Greenfeld: 4 active · 3 acquired · 1 shut down
X followers
Corey Haines: 33K
Jakob Greenfeld: 23K
Categories
Corey Haines: Marketing & SEO ToolsProductized ServicesEducators & Course CreatorsAI Builders
Jakob Greenfeld: Productized ServicesCreators & WritersEducators & Course CreatorsMarketing & SEO Tools
Style
Corey Haines: bootstrappedbuilds in publicserial maker
Jakob Greenfeld: duobootstrappedbuilds in publicexitedserial maker
Courses & resources
Corey Haines: 5
Jakob Greenfeld: 4

Revenue figures are self-reported by each maker and not audited; dates and scope differ. Highlighted categories are shared by both.

Top products

Corey Haines avatarCorey Haines

Conversion Factory logo

Conversion Factory

conversionfactory.co

Subscription-based product marketing and conversion agency for growing SaaS teams.

$1M ARR in 2.5 years
Swipe Files logo

Swipe Files

swipefiles.com

SaaS marketing newsletter, community and courses with 27,000+ subscribers.

Marketing Skills logo

Marketing Skills

marketing-skills.com

Open-source library of 50 marketing skills for Claude Code, Codex, Cursor and other AI agents, with 50K+ GitHub stars.

Magister logo

Magister

magistermarketing.com

Autonomous marketing agent that works inside your tools to audit SEO, build email sequences and manage ads.

See all 8 products by Corey Haines →

Jakob Greenfeld avatarJakob Greenfeld

Sales.co logo

Sales.co

sales.co

Done-for-you cold email and AI-assisted lead generation for B2B companies, co-founded with Ryan Doyle.

$90K/mo
F

Founder Flywheel

founderflywheel.com

Research-as-a-service newsletter for entrepreneurs.

O

Opportunities.so

opportunities.so

Newsletter of researched business opportunities and ideas for entrepreneurs.

Newsletter Spy logo

Newsletter Spy

newsletterspy.io

Data on Substack newsletters and what is growing.

See all 8 products by Jakob Greenfeld →

Tech stack

No tools in common in their publicly listed stacks. See the indie maker tech stack.

Corey Haines avatarCorey Haines

Claude CodeCursorRuby on RailsCircle

Jakob Greenfeld avatarJakob Greenfeld

AirtableGPTWeb scraping

How they build

Corey Haines avatarCorey Haines

  • Marketing something that solves a real problem is a service, not a necessary evil.
  • Learning in public is one of the most generous things you can do.
  • Turn your expertise into frameworks and SOPs — and now into skills AI agents can run.
  • Marketers who learn a little technical skill get outsized leverage.

Jakob Greenfeld avatarJakob Greenfeld

  • Act without asking for permission — most of his wins came from just shipping.
  • Launch many small, cheap experiments and let the market tell you which to keep.
  • Mine data (marketplaces, newsletters, filings) to find business opportunities others overlook.
  • B2B services and distribution often beat building yet another SaaS product.
  • The bar is low: most competitors barely try, so consistent effort stands out.

Learn from Corey and Jakob

Corey Haines avatarCorey Haines

Jakob Greenfeld avatarJakob Greenfeld

Corey Haines vs Jakob Greenfeld FAQ

Who makes more money, Corey Haines or Jakob Greenfeld?

Corey Haines self-reports $1M ARR (Conversion Factory) (as of 2026) and Jakob Greenfeld self-reports $90K/mo (Sales.co) (as of 2024). By these self-reported figures, Jakob Greenfeld'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, Corey Haines or Jakob Greenfeld?

Corey Haines has 8 products listed (including Conversion Factory, Swipe Files and Marketing Skills); Jakob Greenfeld has 8 products listed (including Sales.co, Founder Flywheel and Opportunities.so).

What tech stack do Corey Haines and Jakob Greenfeld use?

Corey Haines uses Claude Code, Cursor, Ruby on Rails and Circle. Jakob Greenfeld uses Airtable, GPT and Web scraping. They don't list any tools in common.

Where are Corey Haines and Jakob Greenfeld based?

Corey Haines: not listed. Jakob Greenfeld: Denmark.

Who has been an indie maker longer, Corey Haines or Jakob Greenfeld?

Corey Haines started in 2020 (6 years indie); Jakob Greenfeld started in 2020 (6 years indie).

Are Corey Haines and Jakob Greenfeld bootstrapped?

Yes, both are listed as bootstrapped founders on IndieMakerList.

Full profiles

Read the full story, timeline and links on Corey Haines's profile and Jakob Greenfeld's profile.

More comparisons

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