$575M sale
2015
The company had hired by the sale, so the exit is a record-book outcome rather than a solo revenue input.
Solo Operator Index
Operators ranked by the best dated annual revenue achieved with zero employees or a near-solo core. The score discounts estimates, later team growth, and loose solo claims instead of treating every internet number as fact.
Research snapshot: Aug 26, 2026
Ranked operators
9
S-tier operators
3
Still solo
3
Corroborated
2
Revenue is log-scaled from $100K to $15M so one outlier cannot erase the field.
Ranked index
Score parts: scale + proof + solo + years
1
SMarkus Frind
Plenty of Fish · Marketplace
56+20+8+3
2
SGary Brewer
BuiltWith · Data SaaS
59+8+5+10
3
SPieter Levels
Nomad List, Remote OK, Photo AI · Product portfolio
41+20+10+10
4
AJustin Welsh
The Saturday Solopreneur · Creator education
40+14+10+6
5
ADan Koe
Koe Letter and courses · Creator education
43+14+8+3
6
ABrett Williams
Designjoy · Productized service
41+8+10+7
Different units, separate board
$575M sale
2015
The company had hired by the sale, so the exit is a record-book outcome rather than a solo revenue input.
41M copies
Dec 2024
Barone created the original game alone for four years. A small update team arrived after release.
$1M cumulative
Jul 2022
Founder-disclosed total across three years and nine income streams, not one year's revenue.
$500K cumulative
Mar 2023
Founder-disclosed lifetime revenue milestone, kept outside the annual revenue ranking.
Method. The index score is 60 points for log-normalized annual revenue, 20 for evidence quality, 10 for solo purity, and 10 for years sustained. Corroborated figures receive 20 evidence points, founder-disclosed figures receive 14, and reported estimates receive 8. Current solo operators receive 10 purity points, solo-at-the-metric operators receive 8, and near-solo cores receive 5. Annualized MRR and single-month figures are labeled as such. The index uses the highest dated annual revenue or run rate found while the business still matched its stated solo operating model. Revenue is gross, not owner earnings, unless a source explicitly says otherwise. This is a research index, not an audited rich list.