analyticsVertical SaaS
Data as of Q1 2026
Summary Verdict
DUOL: 3—APPF: 2wins
Rule of 40
74.9DUOL
33.4APPF
check_circleDUOL leads
Revenue Growth
39.9%DUOL
21.5%APPF
check_circleDUOL leads
Gross Margin
72%DUOL
86%APPF
check_circleAPPF leads
FCF Margin
35.0%DUOL
11.9%APPF
check_circleDUOL leads
Operating Margin
13.1%DUOL
16.6%APPF
check_circleAPPF leads
NRR
—DUOL
—APPF
Metric
Rule of 40Efficiency score
DUOL
74.9check_circle
APPF
33.4
Revenue GrowthYoY
DUOL
39.9%check_circle
APPF
21.5%
Gross Margin% of revenue
DUOL
72%
APPF
86%check_circle
FCF MarginFree cash flow
DUOL
35.0%check_circle
APPF
11.9%
Operating MarginGAAP
DUOL
13.1%
APPF
16.6%check_circle
NRRNet retention
DUOL
N/A
APPF
N/A
EV / RevenueValuation multiple
DUOL
4.1xcheck_circle
APPF
6.2x
Market CapUSD
DUOL
$5.1B
APPF
$6.0Bcheck_circle
ARR GrowthYoY
DUOL
N/A
APPF
N/A
CAC PaybackMonths to recover
DUOL
N/A
APPF
N/A
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insights
Analysis
As of Q1 2026, Duolingo, Inc. trades at 4.1x EV/Revenue versus AppFolio, Inc. at 6.2x. On the Rule of 40, Duolingo, Inc. scores 74.9 compared to AppFolio, Inc.'s 33.4, placing Duolingo, Inc. ahead in operating efficiency. Gross margins stand at Duolingo, Inc. 72% vs AppFolio, Inc. 86%.
Sector Context
Both companies operate in the Vertical SaaS sector. The median columns above show where each company stands relative to their peers.