ACI WORLDWIDE, INC. vs Block, Inc.
Side-by-Side SaaS Metrics & Valuation Comparison
analyticsVertical SaaS
Data as of Q2 2026
Summary Verdict
ACIW: 0—SQ: 5wins
Rule of 40
26.1ACIW
99.5SQ
check_circleSQ leads
Revenue Growth
9.1%ACIW
44.8%SQ
check_circleSQ leads
Gross Margin
46%ACIW
352%SQ
check_circleSQ leads
FCF Margin
17.0%ACIW
54.8%SQ
check_circleSQ leads
Operating Margin
15.2%ACIW
36.5%SQ
check_circleSQ leads
NRR
—ACIW
—SQ
Metric
Rule of 40Efficiency score
ACIW
26.1
SQ
99.5check_circle
Revenue GrowthYoY
ACIW
9.1%
SQ
44.8%check_circle
Gross Margin% of revenue
ACIW
46%
SQ
352%check_circle
FCF MarginFree cash flow
ACIW
17.0%
SQ
54.8%check_circle
Operating MarginGAAP
ACIW
15.2%
SQ
36.5%check_circle
NRRNet retention
ACIW
N/A
SQ
N/A
EV / RevenueValuation multiple
ACIW
3.4xcheck_circle
SQ
14.9x
Market CapUSD
ACIW
$5.3B
SQ
$51.7Bcheck_circle
ARR GrowthYoY
ACIW
N/A
SQ
N/A
CAC PaybackMonths to recover
ACIW
N/A
SQ
N/A
insights
Analysis
As of Q2 2026, ACI WORLDWIDE, INC. trades at 3.4x EV/Revenue versus Block, Inc. at 14.9x. On the Rule of 40, ACI WORLDWIDE, INC. scores 26.1 compared to Block, Inc.'s 99.5, placing Block, Inc. ahead in operating efficiency. Gross margins stand at ACI WORLDWIDE, INC. 46% vs Block, Inc. 352%.
Sector Context
Both companies operate in the Vertical SaaS sector. The median columns above show where each company stands relative to their peers.