CoStar Group, Inc. (CSGP) vs ServiceNow, Inc. (NOW): Which Is the Better Buy in 2026?
As of 2026-06-21, CSGP is overvalued at $30, with a DCF intrinsic value of $1 and a margin of safety of -1979%. NOW is overvalued at $95, with an intrinsic value of $85 and a margin of safety of -12%. Of the two, NOW has the wider margin of safety.
Rewards
- ★Gross margin of 78.6% indicates strong pricing power — typical of businesses with significant intellectual property or brand strength.
- ★Trailing P/E of 430.3x is 54% below the historical average of 937.7x — potentially undervalued relative to its own history.
- ★PEG ratio of 0.11 suggests the stock is undervalued relative to its growth rate — paying less than 1x for each unit of earnings growth.
- ★Gross margin of 76.6% indicates strong pricing power — typical of businesses with significant intellectual property or brand strength.
- ★Free cash flow has grown at a 27.8% CAGR over the past 4 years, demonstrating strong earnings power growth.
- ★Each dollar of retained earnings has created $3.22 of earning power — management is an exceptional capital allocator.
Risks
- ⚠FCF yield of 1.6% is below 3%, meaning the market is pricing in substantial future growth to justify the current price.
- ⚠Free cash flow has declined at a 52.6% CAGR over the past 4 years — a concerning trend.
- ⚠Despite buyback spending, shares outstanding increased in 3 out of 3 years — stock-based compensation is offsetting repurchases.
- ⚠FCF yield of 5.2% suggests reasonable valuation assuming continued moderate growth.
- ⚠6 insider sales totaling $2.7M with no purchases in the past 3 months — insiders are reducing their exposure.
Key Valuation Metrics
Learn more →Historical Fundamentals
Learn more →Price ÷ Earnings Per Share — how many years of current earnings you're paying for at today's price. Lower P/E may indicate undervaluation. The dashed forward point is the forward P/E — today's price ÷ analyst consensus EPS.
Price ÷ Earnings Per Share — how many years of current earnings you're paying for at today's price. Lower P/E may indicate undervaluation. The dashed forward point is the forward P/E — today's price ÷ analyst consensus EPS.
Price ÷ Earnings Per Share — how many years of current earnings you're paying for at today's price. Lower P/E may indicate undervaluation. The dashed forward point is the forward P/E — today's price ÷ analyst consensus EPS.
$1 Retained Earnings Test
Learn more →> $1 created per $1 retained = Value Creator · < $1 created = Value Destroyer
> $1 created per $1 retained = Value Creator · < $1 created = Value Destroyer
Buffett's "$1 Test": For every $1 of earnings retained, has management created at least $1 of market value?
> $1 created per $1 retained = Value Creator · < $1 created = Value Destroyer
Discounted Cash Flow (DCF) Analysis
Learn more →Reverse DCF — Market-Implied Growth
Learn more →What growth rate is the market pricing in at $30?
The market implies +60.0% Owner Earnings growth, above historical trends.
Standard FCF implies a demanding +22.8%, reflecting heavy growth investment.
What growth rate is the market pricing in at $95?
The market implies +21.4% Owner Earnings growth, below historical trends — potential opportunity.
Standard FCF implies a more demanding +6.8%, reflecting heavy growth investment expected to generate future returns.
Economic Moat Score
Learn more →No durable moat detected, though revenue predictability shows some competitive positioning. The business lacks consistent evidence of sustainable advantages.
Narrow moat with revenue predictability as the key competitive advantage. Improving roic consistency would strengthen the moat.
Forensic Accounting
Learn more →M-Score Trend
M-Score Trend
Beneish's 8-variable model estimates the probability of earnings manipulation. An M-Score above -1.78 signals elevated risk — companies in this range have historically been 3-5× more likely to be manipulating earnings. Scores between -2.22 and -1.78 fall in a grey zone warranting further investigation.
Ownership Breakdown
Learn more →High insider ownership aligns management incentives with shareholders. Institutional concentration can indicate smart-money conviction but also crowding risk.
Insider Buying Activity
Learn more →Open market purchases · includes direct & indirect ownership · excludes option exercises.
Insider Selling Activity
Learn more →Direct ownership only · excludes indirect, option exercises, planned (10b5-1) sales & derivatives.
🎭 Mr. Market's Mood
Learn more →"Market is pessimistic — investigate whether fears are temporary or structural"
"Market is pessimistic — investigate whether fears are temporary or structural"
Composite sentiment score based on market signals. Inspired by Buffett’s "Mr. Market" allegory — fear = potential opportunity, greed = potential risk. Must be used alongside fundamental analysis, not in isolation.
⚖️ Buffett Signal
Learn more →The Buffett Signal cross-references market sentiment with DCF valuation. Configure the DCF Analysis above to generate a signal.
The Buffett Signal cross-references market sentiment with DCF valuation. Configure the DCF Analysis above to generate a signal.
Frequently Asked Questions: CSGP vs NOW
Is CoStar Group, Inc. or ServiceNow, Inc. more undervalued in 2026?▼
Based on our discounted cash flow model, NOW trades at a -11.8% margin of safety (intrinsic value $85 vs. price $95), compared to CSGP's -1978.8% margin of safety (intrinsic $1 vs. $30).
Which stock has a wider economic moat, CoStar Group, Inc. or ServiceNow, Inc.?▼
NOW scores 61/100 (Narrow moat), while CSGP scores 37/100 (None moat). The moat score measures competitive advantage durability across ROIC consistency, margin stability, revenue predictability, and reinvestment efficiency.
Which company has better free cash flow, CoStar Group, Inc. or ServiceNow, Inc.?▼
ServiceNow, Inc. (NOW) generates a 5.2% free cash flow yield, compared to CoStar Group, Inc.'s 1.6%. A higher FCF yield means the business converts more of its market value into cash that can be returned to shareholders or reinvested.
Which stock has higher return on invested capital, CoStar Group, Inc. or ServiceNow, Inc.?▼
NOW earns 10.4% ROIC versus CSGP's 0.1%. A higher ROIC means the company generates more profit per dollar of capital employed, a hallmark of durable competitive advantage in Buffett-style analysis.