CALX vs RBBN vs DGII Stock Comparison

Calix, Ribbon Communications and Digi International Prices as of Oct 28, 2026 Peers: Industry group
CALX Calix, Inc
$38.13 +14.9% 1M -38.3% 1Y
Market cap
$2.40B
P/E
47.0x
Revenue (TTM)
$1.11B
Div. yield
–
Networking Equipment Technology
3 wins
DGII Digi International Inc
$78.28 +0.1% 1M +102.4% 1Y
Market cap
$2.98B
P/E
61.1x
Revenue (TTM)
$506.21M
Div. yield
–
Networking Equipment Technology
7 wins

Head to Head

11 decided of 12

Digi International leads on 7 of the 12 questions below (Digi International 7, Calix 3, Ribbon Communications 1). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionCALXRBBNDGIILeader
Larger companyMarket capitalisation $2.40B $294.23M $2.98B DGII
Cheaper on earningsLower P/E, profitable companies only 47.0x 15.8x 61.1x RBBN
Cheaper on forward earningsLower price / next fiscal year consensus EPS 23.5x 32.6x 28.2x CALX
Faster revenue growthRevenue growth, trailing twelve months +27.8% -7.8% +20.3% CALX
More profitableNet margin, trailing twelve months 4.6% 2.3% 9.6% DGII
Better return on capitalReturn on invested capital — 0.0% 6.9% DGII
Less leveragedLower net debt / EBITDA — 9.4x 0.7x DGII
Higher dividend yieldTrailing dividend yield 0.00% 0.00% 0.00% –
Better 1-year returnPrice return, last 12 months -38.3% -52.9% +102.4% DGII
Better 5-year returnAnnualised price return, 5 years -9.4%/yr -21.5%/yr +29.5%/yr DGII
Less volatileAnnualised volatility, 1 year 41.6% 69.3% 40.8% DGII
Higher overall scoreMean of the five percentile scores vs peers 76/100 41/100 60/100 CALX

Percentile Scorecard

CALXRBBNDGII

Each axis is the mean percentile of its metrics against the company's industry group. 100 is the best in the group, 50 the middle.

Scores by Axis

AxisCALXRBBNDGII
Valuation 59 #46 of 111 61 #44 of 111 45 #62 of 111
Growth 82 #20 of 108 21 #86 of 108 70 #33 of 108
Profitability 64 #38 of 104 34 #69 of 104 82 #20 of 104
Financial Health 75 #29 of 115 18 #95 of 115 49 #59 of 115
Shareholder Returns 97 #3 of 78 70 #24 of 78 57 #34 of 78
Overall 76 41 60
  • CALX ranked among 121 companies in Computer Hardware
  • RBBN ranked among 121 companies in Computer Hardware
  • DGII ranked among 121 companies in Computer Hardware

Price Performance

Price return, split-adjusted, before dividends. Click a name to hide or show it.

Returns

PeriodCALXRBBNDGIISPY
1 month +14.9%-5.8%+0.1% +0.9%
3 months +7.2%-25.6%+19.5% +5.9%
6 months -8.5%-31.5%+43.2% +8.5%
Year to date -28.0%-43.4%+80.8% +13.3%
1 year -38.3%-52.9%+102.4% +12.4%
3 years +16.6%-21.6%+209.8% +88.1%
3 years, per year +5.2%-7.8%+45.8% +23.5%
5 years -39.1%-70.2%+263.2% +68.2%
5 years, per year -9.4%-21.5%+29.5% +11.0%
10 years +495.8%-71.3%+707.0% +263.4%
10 years, per year +19.5%-11.7%+23.2% +13.8%

Risk

MeasureCALXRBBNDGIISPY
Volatility, 1Y 41.6%69.3%40.8% 12.7%
Downside volatility, 1Y 43.8%79.2%38.7% 12.7%
Beta vs S&P 500, 1Y 0.881.331.43 1.00
Return / volatility, 1Y -0.92-0.762.51 0.98
Max drawdown, 5Y -65.3%-78.9%-48.6% -25.4%
From 52-week high -44.3%-52.9%-8.2% -0.9%
52-week high $68.42$3.46$85.24 $779.14
52-week low $33.15$1.32$35.40 $631.97

Valuation History

Weekly multiples on trailing twelve-month fundamentals. Negative or extreme readings (a loss year, a collapsed denominator) are left out so the chart stays readable.

MultipleCALXRBBNDGII
P/E now vs peer median 47.3xmedian 33.5x 15.7xmedian 33.5x 60.7xmedian 33.5x
P/S now vs peer median 2.2xmedian 2.8x 0.4xmedian 2.8x 5.9xmedian 2.8x
EV/EBITDA now vs peer median 27.9xmedian 19.6x 18.5xmedian 19.6x 27.0xmedian 19.6x
P/FCF now vs peer median 28.1xmedian 29.8x -10.0xmedian 29.8x 21.8xmedian 29.8x
P/B now vs peer median 3.4xmedian 2.9x 0.8xmedian 2.9x 4.3xmedian 2.9x
PEG now vs peer median 6.69median 1.10 0.48median 1.10 3.82median 1.10

Financial History

Reported figures by fiscal period, placed on the calendar year (or quarter) each period ended in, so companies with different fiscal years line up.

Trailing twelve monthsCALXRBBNDGII
Revenue $1.11B $800.98M $506.21M
Gross profit $628.73M $386.62M $323.07M
Operating income $61.25M -$29.02M $70.58M
Net income $51.19M $18.59M $48.74M
Free cash flow $85.42M -$29.11M $135.98M
R&D $207.99M $178.44M $73.84M
EPS (diluted) $0.78 $0.10 $1.25
Cash & equivalents $68.91M $40.38M $27.97M
Total debt – $342.88M $108.13M
Shares (diluted) 65.51M 178.86M 38.92M
Enterprise value $1.24B $46.37M $2.87B

All Metrics

58 metrics · best in bold

Bold marks the best reading: the lowest positive value for multiples, leverage and payout, the highest for everything else. The bar under each value is its percentile against that company's own peers. Hover a value for its rank and the peer median.

Valuation

12 metrics
MetricCALXRBBNDGII
P/E 47.3x 15.7x 60.7x
P/FCF 28.1x -10.0x 21.8x
P/Operating cash flow 21.9x -15.6x 21.5x
P/S 2.2x 0.4x 5.9x
P/B 3.4x 0.8x 4.3x
P/Tangible book 3.4x 1.1x 9.3x
EV/EBITDA 27.9x 18.5x 27.0x
EV/EBIT 36.0x -20.5x 43.2x
EV/Revenue 2.0x 0.7x 6.0x
EV/FCF 25.8x -20.4x 22.4x
EV/Operating cash flow 20.1x -31.8x 22.0x
PEG (3Y EPS CAGR) 6.69 0.48 3.82

Growth

14 metrics
MetricCALXRBBNDGII
Revenue growth (1Y) 27.8% -7.8% 20.3%
Revenue CAGR (3Y) 3.9% -1.3% 4.9%
Gross profit growth (1Y) 30.3% -12.1% 23.4%
Gross profit CAGR (3Y) 7.4% -1.2% 9.3%
Operating income growth (1Y) 273.3% -240.9% 24.0%
Operating income CAGR (3Y) 3.8% 9.9% 9.7%
Net income growth (1Y) 290.5% 143.2% 14.2%
Net income CAGR (3Y) 4.9% 33.0% 18.0%
EPS growth (1Y) 287.6% 142.6% 10.5%
EPS CAGR (3Y) 7.1% 32.7% 15.9%
Operating cash flow growth (1Y) 24.5% -122.3% 30.1%
Operating cash flow CAGR (3Y) 41.8% -50.8% 59.2%
Free cash flow growth (1Y) 19.4% -155.4% 31.6%
Free cash flow CAGR (3Y) 62.0% -90.6% 60.8%

Profitability

14 metrics
MetricCALXRBBNDGII
Gross margin 56.6% 48.3% 63.8%
EBITDA margin 7.1% 4.0% 22.3%
Operating margin 5.5% -3.6% 13.9%
Pretax margin 6.5% -8.9% 12.4%
Net margin 4.6% 2.3% 9.6%
FCF margin 7.7% -3.6% 26.9%
Operating cash flow margin 9.9% -2.3% 27.3%
Return on equity 7.1% 4.8% 7.2%
Return on assets 5.4% 1.6% 5.0%
Return on invested capital – 0.0% 6.9%
Return on capital employed 8.2% -3.5% 8.4%
Asset turnover 1.2x 0.7x 0.5x
Cash conversion (OCF / net income) 2.1x -1.0x 2.8x
Stock comp / revenue 7.2% 2.7% 3.4%

Financial Health

11 metrics
MetricCALXRBBNDGII
Debt / assets – 29.8% 11.2%
Debt / equity – 0.9x 0.2x
Net debt / EBITDA – 9.4x 0.7x
Debt / FCF – -11.8x 0.8x
Liabilities / assets 25.6% 66.2% 29.0%
Equity / assets 74.4% 33.8% 71.0%
Interest coverage – – 8.9x
Current ratio 2.8x 1.3x 1.1x
Quick ratio 1.6x 1.1x 0.7x
Cash ratio 0.9x 0.1x 0.2x
Altman Z-score 7.25 -1.00 7.65

Shareholder Returns

7 metrics
MetricCALXRBBNDGII
Dividend yield – – –
Net buyback yield 8.0% 1.4% 0.0%
Shareholder yield 8.0% 1.4% 0.0%
Payout ratio (earnings) – – –
Payout ratio (FCF) – – –
Dividend growth (1Y) – – –
Dividend CAGR (3Y) – – –

Analyst Estimates

Solid lines are reported fiscal-year results; dashed lines are the consensus for the years ahead. Hover a year for the analysts' high and low, and how each result compared with its estimate.

ConsensusCALXRBBNDGII
Forward P/E 23.5xFY2026 32.6xFY2026 28.2xFY2026
EPS, next fiscal year $1.62FY2026 $0.05FY2026 $2.78FY2026
EPS growth, next FY +20.9%FY2026 -92.4%FY2026 +32.4%FY2026
EPS growth, the year after +48.1% +200.0% +9.4%
Revenue, next fiscal year $1.11BFY2026 $790.52MFY2026 $519.66MFY2026
Revenue growth, next FY +11.0%FY2026 -6.4%FY2026 +20.8%FY2026
Revenue growth, the year after +18.8% +11.9% +3.8%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersCALXRBBNDGII
Held by institutions 94.5% 71.8% 100.0%
Institutions holding 288 161 283
Change in shares held, QoQ +0.5% -0.7% +1.6%
Institutions buying 148 88 142
Institutions selling 111 41 105
Buyers to sellers 1.33 2.15 1.35

Return Correlation

Daily returns, last 12 months

1.00 means two stocks move in lockstep, 0 that they move independently. Pairs below about 0.5 diversify each other.

CALXRBBNDGII
CALX 1.00 0.13 0.14
RBBN 0.13 1.00 0.22
DGII 0.14 0.22 1.00

Add a Peer

Largest companies in the same industry

Related Comparisons

Frequently Asked Questions

Which is bigger, CALX, RBBN and DGII?

Digi International (DGII) is the largest by market capitalisation: Calix (CALX) $2.40B, Ribbon Communications (RBBN) $294.23M, Digi International (DGII) $2.98B.

Which stock is cheaper, CALX, RBBN and DGII?

Ribbon Communications (RBBN) trades on the lowest price-to-earnings ratio (Calix (CALX) 47.0x, Ribbon Communications (RBBN) 15.8x, Digi International (DGII) 61.1x). On next year's consensus earnings, Calix (CALX) is cheapest (Calix (CALX) 23.5x, Ribbon Communications (RBBN) 32.6x, Digi International (DGII) 28.2x). A lower multiple can reflect slower expected growth, so read it next to the growth figures.

Which company is growing faster?

Calix (CALX) grew revenue fastest over the trailing twelve months: Calix (CALX) +27.8%, Ribbon Communications (RBBN) -7.8%, Digi International (DGII) +20.3%.

Which company is more profitable?

Digi International (DGII) has the highest net margin (Calix (CALX) 4.6%, Ribbon Communications (RBBN) 2.3%, Digi International (DGII) 9.6%). On return on invested capital, Digi International (DGII) leads (Ribbon Communications (RBBN) 0.0%, Digi International (DGII) 6.9%).

Which stock has performed better?

Over the past year Digi International (DGII) returned the most: Calix (CALX) -38.3%, Ribbon Communications (RBBN) -52.9%, Digi International (DGII) +102.4%. Over five years, Digi International (DGII) compounded fastest (Calix (CALX) -9.4%/yr, Ribbon Communications (RBBN) -21.5%/yr, Digi International (DGII) +29.5%/yr). Returns are price only, before dividends.

Which stock is riskier?

By one-year price volatility, Digi International (DGII) has been the steadiest (Calix (CALX) 41.6%, Ribbon Communications (RBBN) 69.3%, Digi International (DGII) 40.8%). Volatility measures how widely the price swings, not the risk of the business.

Which is the better stock, CALX, RBBN and DGII?

There is no single answer; it depends on what you are buying for. On the 12 head-to-head measures on this page, Digi International (DGII) leads on 7. Business Quant does not give investment advice; use the comparison as a starting point for your own research.

Data from SEC filings, exchange prices and consensus estimates, via Business Quant. Percentile scores compare each company with its own peer group, so two companies' scores are each relative to different peers unless you rank against the whole market. Price returns exclude dividends. Nothing on this page is investment advice.