Sifting through countless of stocks in the Software industry can be tedious, and sometimes two stocks are just too similar to judge which is the better investment. If you’re on the fence about investing in InterDigital, Inc., Calix or Inc. because you’re not sure how they measure up, it’s important to compare them on a few factors before making your decision.

Read on to learn how InterDigital, Inc., Calix and Inc. compare based on key financial metrics to determine which better meets your investment needs.

About InterDigital, Inc., Calix and Inc.

InterDigital, Inc. operates as a global research and development company focuses on wireless, visual, artificial intelligence (AI), and related technologies. The company engages in the design and development of technologies that enable connected in a range of communications and entertainment products and services, which are licensed to companies providing various products and services, including makers of wireless communications devices, consumer electronics, IoT devices, and cars and other motor vehicles, as well as providers of cloud-based services, such as video streaming. It designs and develops a range of innovations for use in digital cellular and wireless products and networks. The company also develops cellular technologies, such as technologies related to CDMA, TDMA, OFDM/OFDMA, and MIMO for use in 2G, 3G, 4G, and 5G wireless networks, as well as mobile terminal devices; and 3GPP technology portfolio in 5G advanced and 6G, as well as technologies for mobile phones, automobiles and autonomous vehicles, wearables, smart factories and smart homes, robots, drones, and other connected consumer electronic products. In addition, it provides video coding and transmission technologies, and artificial intelligence and machine learning solutions. Further, the company’s patented technologies are used in various products that include smartphones, tablets, consumer electronics, base stations, televisions, laptops, gaming consoles, set-top boxes, streaming devices, and connected automobiles, as well as patented technologies are used in various services, such as video streaming, user generated content sharing, video conferencing, video gaming, and other cloud-based services. InterDigital, Inc. was incorporated in 1972 and is headquartered in Wilmington, Delaware.

Calix, Inc., together with its subsidiaries, engages in the provision of cloud and software platforms, and systems and services in the United States, rest of Americas, Europe, the Middle East, Africa, and the Asia Pacific. The company cloud and software platforms, and systems and services enable broadband service providers (BSPs) to provide a range of services. It offers Calix Cloud platform comprising Calix Engagement Cloud, Calix Operations Cloud, and Calix Service Cloud, which are configurable to display role-based insights and enable BEPs to anticipate and target new revenue-generating services and applications through mobile application, such as CommandIQ for residents and CommandWorx for businesses; Calix Intelligent Access, an access network solution for automated and intelligent networks; and Calix Unlimited Subscriber, a solution for subscriber managed services. It also provides SmartLife managed services, including SmartHome managed services and applications to enhance, operate and secure the connected experience of subscribers in their home for Wi-Fi, advanced content control, network security, connected cameras, and social media monitoring; SmartTown managed services that reimagine community Wi-Fi as a ubiquitous, secure, and managed experience across a BEP’s footprint; SmartBiz managed services that address the business networking and productivity needs of business owners with an all-in-one managed service; SMARTMDU managed services provide purpose-built, flexible connectivity solutions for multi-family properties of any type. In addition, the company offers Wi-Fi systems under GigaSpire and GigaPro brands to be ready for deployment as a complete subscriber experience solution for BEP’s residential and business subscribers. It provides its products through its direct sales force and resellers. Calix, Inc. was incorporated in 1999 and is headquartered in San Jose, California.

Latest Software and InterDigital, Inc., Calix, Inc. Stock News

As of September 4, 2026, InterDigital, Inc. had a $8.7 billion market capitalization, compared to the Software median of $1.1 million. InterDigital, Inc.’s stock is up 6.1% in 2026, up 0.8% in the previous five trading days and up 17.39% in the past year.

Currently, InterDigital, Inc.’s price-earnings ratio is 39.2. InterDigital, Inc.’s trailing 12-month revenue is $788.5 million with a 38.3% net profit margin. Year-over-year quarterly sales growth most recently was -13.4%. Analysts expect adjusted earnings to reach $11.555 per share for the current fiscal year. InterDigital, Inc. currently has a 0.8% dividend yield.

As of September 4, 2026, Calix, Inc. had a $2.3 billion market cap, putting it in the 55th percentile of all stocks. Calix, Inc.’s stock is down 32.1% in 2026, down 4.1% in the previous five trading days and down 41.09% in the past year.

Currently, Calix, Inc.’s price-earnings ratio is 49.1. Calix, Inc.’s trailing 12-month revenue is $1.1 billion with a 4.6% net profit margin. Year-over-year quarterly sales growth most recently was 21.2%. Analysts expect adjusted earnings to reach $1.722 per share for the current fiscal year. Calix, Inc. does not currently pay a dividend.

How We Compare InterDigital, Inc., Calix and Inc. Stock Grades

Stock evaluation requires access to huge amounts of data and the knowledge and time to sift through it all, make sense of financial ratios, read income statements and analyze recent stock movements. AAII created A+ Investor, a robust data suite that condenses data research in an actionable and customizable way suitable for investors of all knowledge levels, to help investors streamline and work through such data.

AAII’s proprietary stock grades come with A+ Investor. These offer intuitive A‐F grades for each of five key investing factors: value, growth, momentum, earnings estimate revisions and quality. Here, we’ll take a closer look at InterDigital, Inc., Calix and Inc.’s stock grades to see how they measure up against one another.

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InterDigital, Inc., Calix and Inc. Growth Grades

Company	Ticker	Growth
InterDigital, Inc.	IDCC	A
Calix, Inc.	CALX	A

The foundation of growth investing is seeking out stocks of companies exhibiting strong, consistent and prolonged growth that is expected to continue into the future.

In order to compute the growth score and assign it a letter grade, the percentile ranks for each of three components‐consistency of annual sales growth, five-year sales growth rankings adjusted for extreme levels, and consistency of positive annual cash from operations‐must be determined. These three rank figures are added together, and the sum is ranked against the entire stock universe to arrive at a company’s Growth Score to create an equal distribution of grades.

The companies in the bottom 20% of the stock universe receive Growth Grades of F, considered to be very weak, while those in the top 20% receive A grades, which are considered very strong.

InterDigital, Inc. has a Growth Score of 83, which is Very Strong. Calix, Inc. has a Growth Score of 83, which is Very Strong.

The Growth Grade Winner: It’s a Tie!

Looking at the Growth Grade breakdown above, both InterDigital, Inc., Calix and Inc. have a grade of A. For investors who focus solely on a company’s upward growth, further research should be conducted into both companies’ other financial metrics before deciding whether to invest.

InterDigital, Inc., Calix and Inc.’s Momentum Grades

Company	Ticker	Momentum
InterDigital, Inc.	IDCC	B
Calix, Inc.	CALX	F

Momentum grades help to uncover stocks experiencing anomalously high rates of return; research finds that stocks with high relative levels of momentum tend to outperform, whereas those with low levels of momentum tend to continue underperforming. Momentum is based on the price change of a stock over a specified period relative to all other stocks.

Typically, AAII looks at the weighted relative strength over the trailing four quarters. The weighted four-quarter relative strength rank is the relative price change for each of the past four quarters. The most recent quarterly price change is given a weight of 40% and each of the three previous quarters are given a weighting of 20%.

InterDigital, Inc. has a Momentum Score of 77, which is Strong. Calix, Inc. has a Momentum Score of 17, which is Very Weak.

The Momentum Grade Winner: InterDigital, Inc.

As you can clearly see from the Momentum Grade breakdown above, InterDigital, Inc. is considered to have stronger momentum compared to Calix, Inc.. For those specifically looking for companies that have stronger momentum compared to other companies in the same industry, InterDigital, Inc. could be a good stock to invest in. However, it’s important for investors to analyze multiple factors based on a wide range of metrics before deciding whether to buy.

InterDigital, Inc., Calix and Inc.’s Estimate Revisions Grades

Company	Ticker	Earnings Estimate
InterDigital, Inc.	IDCC	B
Calix, Inc.	CALX	C

Earnings estimate revisions scores consider the magnitude of a company’s earnings surprise in its last two reported fiscal quarters. Often, positive surprises beget further positive surprises‐or at least continued sales growth (the exact opposite is generally true, too).

Estimate revisions offer an indication of what analysts are thinking about the short-term prospects of a firm. Estimate revisions are based on the statistical significance of a firm’s last two quarterly earnings surprises and the percentage change in its consensus estimate for the current fiscal year over the past month and past three months.

InterDigital, Inc. has a Earnings Estimate Score of 66, which is Positive. Calix, Inc. has a Earnings Estimate Score of 60, which is Neutral.

The Earnings Estimate Revisions Grade Winner: InterDigital, Inc.

As you can clearly see from the Earnings Estimate Revisions Grade breakdown above, InterDigital, Inc. has a better Earnings Estimate Revisions Grade than Calix, Inc.. For those who are specifically looking for companies with better short-term prospects when compared to other companies in the same industry, InterDigital, Inc. could be a good stock to invest in. However, it’s important to analyze multiple factors based on a wide range of metrics before deciding whether to buy.

Other InterDigital, Inc., Calix and Inc. Grades

In addition to Estimate Revisions, Growth and Momentum, A+ Investor also provides grades for Value and Quality.

Successful stock investing involves buying low and selling high, so stock valuation is an important consideration for stock selection. Buying stocks that are going to go up typically means buying stocks that are undervalued in the first place, although momentum investors may argue that point.

AAII’s A+ Investor Quality Grade comes from the ranking of key metrics. Specifically, the quality grade is the percentile rank of the composite of return on assets (ROA), return on invested capital (ROIC), gross profit relative to assets, buyback yield, change in total liabilities to assets, accruals, Z double prime bankruptcy risk (Z) score and F-Score.

These 2 key factors, when combined with the above, provide a holistic view into a particular stock. Further, by joining A+ Investor you can see whether InterDigital, Inc., Calix and Inc. pass any of our 60+ stock screens that have outperformed the market since their creation.

So, Which Is the Better Investment, InterDigital, Inc., Calix or Inc. Stock?

Overall, InterDigital, Inc. stock has a Growth Score of 83, Momentum Score of 77 and Estimate Revisions Score of 66.

Calix, Inc. stock has a Growth Score of 83, Momentum Score of 17 and Estimate Revisions Score of 60.

Comparing InterDigital, Inc., Calix and Inc.’s grades, scores and metrics can act as a solid basis to determine whether they may be a good investment or not. You’ll also want to look at your portfolio’s asset allocation as well as your risk tolerance and financial goals to see if either of these stocks would make a good fit for you. AAII can help you figure out which investments align with your individual needs and preferences.

Investors are encouraged to do their own due diligence and research. In this way, individuals can effectively become managers of their own assets‐without having to rely on others for financial independence. You can count on AAII for timeless articles on financial planning and stock-picking, unbiased research and actionable analysis.

A+ Investor adds to our qualitative teaching with a powerful data suite to help you whittle down investment choices to find stocks, exchange-traded funds (ETFs) or mutual funds that meet your needs.

AAII Disclaimer

We make no representations or warranties that any investor will, or is likely to, achieve profits similar to those shown, because past, hypothetical or simulated performance is not necessarily indicative of future results. Before making an investment decision, you should consider your circumstances and whether the information on our content is applicable to your situation. This information was prepared in good faith, and we accept no liability for any errors or omissions. The full disclaimer can be read here.