The archive · Developer & Business Tools · Strategic decision · 2013–2019
ConvertKit bootstrapped creator email to $15M ARR on $55K of founder money
Nathan Barry built email marketing for professional bloggers from Boise, grew it to $15M ARR with 38 people — no outside capital, funded by customers.
ConvertKit
What the business is
ConvertKit is email marketing and automation software for creators (bloggers, podcasters, authors, YouTubers), with paid plans from $29/month.
Starting capital：$5,000 to start, then $50,000 more when going all-in; no outside capital
How it started
In 2013, designer-turned-author Nathan Barry launched a web-app challenge to build a business with recurring revenue: ConvertKit. Frustrated that existing platforms were either too simple or too complex for creators, he started with $5,000 of his own money and focused on professional bloggers.
What happened
After a slow start — revenue dipped to $1,300 MRR 15 months in and a friend advised shutting down — the niche focus and free concierge migrations took hold. Webinars with affiliate partners became the first scalable channel, and the company crossed $15M ARR in early 2019 with a team of 38 (nearly $400K ARR per person).
How it ended up
ConvertKit kept compounding: $28.3M ARR with 36,634 active customers by July 2021, $33.5M ARR at end-2022 with 44,939 paying customers and 100% net dollar retention. It later raised a $12M Series A, rebranded to Kit in 2024, and remained founder-led from Boise.
Background
ConvertKit started in 2013 as Nathan Barry's web-app challenge: build a business with recurring revenue. He put in $5,000, then another $50,000 when he committed fully, and targeted a niche the incumbents ignored — email marketing for professional bloggers.
Early growth was deliberately unscalable: Barry listed prospects, sold directly, and migrated each early customer off Mailchimp and other tools by hand for free. The referrals that followed became word of mouth, and webinars with affiliate partners became the first repeatable channel.
The company crossed $15M ARR in early 2019 with just 38 people — roughly $400,000 in ARR per team member — with no outside capital. Barry shared the financials openly as an 'open startup', a transparency mission he kept even as competitors watched.
Growth continued on the same model: $28.3M ARR by mid-2021, $33.5M ARR and 44,939 paying customers by end-2022, with 100% net dollar retention. ConvertKit later raised a $12M Series A and rebranded to Kit in 2024, but the bootstrapped years defined the business.
What has to be true
- Choosing a tight niche ('email marketing for professional bloggers') made messaging clear, trimmed the roadmap, and made prospect lists easy to build.
- Doing the hard, unscalable work — free concierge migrations for early customers — created the referrals that turned into a durable word-of-mouth engine.
- Running without outside capital forced focus: 38 people at $15M ARR meant saying no to everything except the highest-leverage work.
- Public, open financials (open startup) built trust and a brand that creators wanted to be associated with.
What can be applied
A tight niche plus customers served so well they become the sales force makes funding optional; revenue-funded growth forces focus.
Aftermath
ConvertKit remained an independent, founder-led company from Boise, Idaho. After the bootstrapped run to $15M ARR, it raised its first institutional round (~$12M in 2020), kept publishing revenue numbers (≈$33.5M ARR in 2022), and rebranded to Kit in late 2024 with reported ARR around $43M+. It continues serving creators with email, commerce, and sponsor-network products, and Nathan Barry still writes publicly about the build.
Sources
- 15 lessons from our first $15 million
- 2022 Review — A year of growth and managing stress
- 0 to 28M ARR While Building In Public | Nathan Barry
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