ACI WORLDWIDE, INC. vs CSG SYSTEMS INTERNATIONAL INC
Side-by-Side SaaS Metrics & Valuation Comparison
analyticsVertical SaaS
Data as of Q2 2026
Summary Verdict
ACIW: 4—CSGS: 1wins
Rule of 40
26.1ACIW
-0.5CSGS
check_circleACIW leads
Revenue Growth
9.1%ACIW
1.4%CSGS
check_circleACIW leads
Gross Margin
46%ACIW
49%CSGS
check_circleCSGS leads
FCF Margin
17.0%ACIW
-1.9%CSGS
check_circleACIW leads
Operating Margin
15.2%ACIW
10.3%CSGS
check_circleACIW leads
NRR
—ACIW
—CSGS
Metric
Rule of 40Efficiency score
ACIW
26.1check_circle
CSGS
-0.5
Revenue GrowthYoY
ACIW
9.1%check_circle
CSGS
1.4%
Gross Margin% of revenue
ACIW
46%
CSGS
49%check_circle
FCF MarginFree cash flow
ACIW
17.0%check_circle
CSGS
-1.9%
Operating MarginGAAP
ACIW
15.2%check_circle
CSGS
10.3%
NRRNet retention
ACIW
N/A
CSGS
N/A
EV / RevenueValuation multiple
ACIW
3.5x
CSGS
2.2xcheck_circle
Market CapUSD
ACIW
$5.3Bcheck_circle
CSGS
$2.3B
ARR GrowthYoY
ACIW
N/A
CSGS
N/A
CAC PaybackMonths to recover
ACIW
N/A
CSGS
N/A
insights
Analysis
As of Q2 2026, ACI WORLDWIDE, INC. trades at 3.5x EV/Revenue versus CSG SYSTEMS INTERNATIONAL INC at 2.2x. On the Rule of 40, ACI WORLDWIDE, INC. scores 26.1 compared to CSG SYSTEMS INTERNATIONAL INC's -0.5, placing ACI WORLDWIDE, INC. ahead in operating efficiency. Gross margins stand at ACI WORLDWIDE, INC. 46% vs CSG SYSTEMS INTERNATIONAL INC 49%.
Sector Context
Both companies operate in the Vertical SaaS sector. The median columns above show where each company stands relative to their peers.