If you look up “largest software companies in the USA,” you’ll often find mixed lists that quietly include companies that trade in the U.S. but are not U.S.-based (Shopify and Atlassian are the classic examples). In this article, the main ranking focuses on U.S.-based software companies, and it includes both public companies (market cap) and private companies (latest reported valuation).
Important note: Market caps change daily. Private valuations are “last reported” numbers from funding rounds / secondary transactions and can be stale.
How software grew so fast in the last 10 years
A big reason software companies dominate “largest companies” lists today is that software shifted from “a product you buy once” to recurring revenue systems:
- SaaS subscriptions replaced one-time licenses
- Cloud delivery reduced friction to adopt tools globally
- Security, data, and compliance became massive categories as everything moved online
- AI features accelerated “software spend” by adding new value (and new infrastructure demand)
A useful way to quantify the expansion: Gartner’s worldwide forecast shows software spending at ~$310B in 2015 versus ~$1.232T in 2025 (in current USD, “Software” category), which is roughly a 4× increase over the decade. (gartner.com)
Methodology (so the table makes sense)
- Public companies: ranked by market cap using CompaniesMarketCap’s “largest software companies” dataset.
- Private companies: ranked using latest widely reported valuation (funding round / secondary / reputable reporting).
- “Value” column: market cap (public) or valuation (private), shown in USD.
- Scope: U.S.-based companies in this main table.
Public market cap source: (CompaniesMarketCap)
Private valuation sources (reputable reporting / company announcements):
Top 50 U.S.-based software companies (public + private), ranked by value
| # | Company | Type | Ticker | Value |
|---|---|---|---|---|
| 1 | Apple | Public | AAPL | $4.021T |
| 2 | Alphabet | Public | GOOG | $3.806T |
| 3 | Microsoft | Public | MSFT | $3.515T |
| 4 | Oracle | Public | ORCL | $562.30B |
| 5 | OpenAI | Private | — | $500.00B |
| 6 | Palantir | Public | PLTR | $400.08B |
| 7 | IBM | Public | IBM | $272.47B |
| 8 | Salesforce | Public | CRM | $241.44B |
| 9 | xAI | Private | — | $230.00B |
| 10 | AppLovin | Public | APP | $209.14B |
| 11 | Anthropic | Private | — | $183.00B |
| 12 | Intuit | Public | INTU | $175.24B |
| 13 | ServiceNow | Public | NOW | $153.11B |
| 14 | Adobe | Public | ADBE | $141.38B |
| 15 | Databricks | Private | — | $134.00B |
| 16 | Palo Alto Networks | Public | PANW | $125.02B |
| 17 | CrowdStrike | Public | CRWD | $114.34B |
| 18 | ADP | Public | ADP | $102.43B |
| 19 | Synopsys | Public | SNPS | $91.91B |
| 20 | Stripe | Private | — | $91.50B |
| 21 | Cadence Design Systems | Public | CDNS | $84.58B |
| 22 | Snowflake | Public | SNOW | $74.15B |
| 23 | Cloudflare | Public | NET | $68.66B |
| 24 | Autodesk | Public | ADSK | $61.07B |
| 25 | Fortinet | Public | FTNT | $59.67B |
| 26 | Workday | Public | WDAY | $54.94B |
| 27 | Datadog | Public | DDOG | $46.90B |
| 28 | Strategy | Public | MSTR | $45.16B |
| 29 | FICO | Public | FICO | $39.44B |
| 30 | Veeva Systems | Public | VEEV | $36.08B |
| 31 | Keysight Technologies | Public | KEYS | $35.49B |
| 32 | Zscaler | Public | ZS | $35.17B |
| 33 | MongoDB | Public | MDB | $32.52B |
| 34 | Epic Games | Private | — | $31.50B |
| 35 | Anduril | Private | — | $30.50B |
| 36 | Scale AI | Private | — | $29.00B |
| 37 | Zoom | Public | ZM | $24.93B |
| 38 | Leidos | Public | LDOS | $23.53B |
| 39 | NetApp | Public | NTAP | $21.25B |
| 40 | Twilio | Public | TWLO | $21.22B |
| 41 | SS&C Technologies | Public | SSNC | $20.94B |
| 42 | PTC | Public | PTC | $20.31B |
| 43 | HubSpot | Public | HUBS | $20.14B |
| 44 | Toast | Public | TOST | $20.00B |
| 45 | Samsara | Public | IOT | $19.57B |
| 46 | Unity Software | Public | U | $18.93B |
| 47 | Tyler Technologies | Public | TYL | $18.85B |
| 48 | Trimble | Public | TRMB | $18.64B |
| 49 | Figma | Public | FIG | $18.63B |
| 50 | The Trade Desk | Public | TTD | $18.42B |
Quick correction (because this confuses a lot of “USA” lists)
Some “top software companies in the USA” lists actually mean “popular software companies traded in the U.S. market.” That’s how you’ll often see these included:
- Shopify — headquartered in Ottawa, Canada
- Atlassian — globally headquartered in Sydney, Australia (also has a U.S. HQ presence)
So yes: they can appear in U.S. stock screeners, but they’re not U.S.-based companies.
What this ranking tells you about 2026
- Mega-cap “software platforms” dominate (Microsoft, Alphabet, Apple) because software is now deeply tied to ecosystems, cloud, and distribution.
- Security is a top-tier category (Palo Alto Networks, CrowdStrike, Fortinet, Zscaler) because every company became an internet company.
- Data + AI infrastructure is where private value concentrates (OpenAI, Anthropic, Databricks, Scale AI) because the “software layer” now includes models, agents, and data pipelines—not just apps.
- SaaS winners look like compounding machines (ServiceNow, Salesforce, Workday, Datadog, HubSpot): high retention + long customer lifetimes = big multiples.