ACI WORLDWIDE, INC. vs Duolingo, Inc.
Side-by-Side SaaS Metrics & Valuation Comparison
analyticsVertical SaaS
Data as of Q1 2026
Summary Verdict
ACIW: 1—DUOL: 4wins
Rule of 40
24.2ACIW
74.9DUOL
check_circleDUOL leads
Revenue Growth
6.9%ACIW
39.9%DUOL
check_circleDUOL leads
Gross Margin
47%ACIW
72%DUOL
check_circleDUOL leads
FCF Margin
17.3%ACIW
35.0%DUOL
check_circleDUOL leads
Operating Margin
16.4%ACIW
13.1%DUOL
check_circleACIW leads
NRR
—ACIW
—DUOL
Metric
Rule of 40Efficiency score
ACIW
24.2
DUOL
74.9check_circle
Revenue GrowthYoY
ACIW
6.9%
DUOL
39.9%check_circle
Gross Margin% of revenue
ACIW
47%
DUOL
72%check_circle
FCF MarginFree cash flow
ACIW
17.3%
DUOL
35.0%check_circle
Operating MarginGAAP
ACIW
16.4%check_circle
DUOL
13.1%
NRRNet retention
ACIW
N/A
DUOL
N/A
EV / RevenueValuation multiple
ACIW
3.9xcheck_circle
DUOL
5.2x
Market CapUSD
ACIW
$5.9B
DUOL
$6.2Bcheck_circle
ARR GrowthYoY
ACIW
N/A
DUOL
N/A
CAC PaybackMonths to recover
ACIW
N/A
DUOL
N/A
insights
Analysis
As of Q1 2026, ACI WORLDWIDE, INC. trades at 3.9x EV/Revenue versus Duolingo, Inc. at 5.2x. On the Rule of 40, ACI WORLDWIDE, INC. scores 24.2 compared to Duolingo, Inc.'s 74.9, placing Duolingo, Inc. ahead in operating efficiency. Gross margins stand at ACI WORLDWIDE, INC. 47% vs Duolingo, Inc. 72%.
Sector Context
Both companies operate in the Vertical SaaS sector. The median columns above show where each company stands relative to their peers.