> Enrich.chat gives AI agents verified work emails and mobiles. To use it from an agent, read https://enrich.chat/agents.md . This is the Markdown version of https://enrich.chat/companies-in/irvine-ca/

# Companies in Irvine, CA

Pick an industry to see the bigger companies headquartered in Irvine, CA, what they do and how big they are.

By Enrich.chat Editorial. Updated October 22, 2026.

## Industries in Irvine

- [Software Companies in Irvine](https://enrich.chat/companies-in/irvine-ca/software-development/): Software Development
- [IT Services Companies in Irvine](https://enrich.chat/companies-in/irvine-ca/it-services-and-it-consulting/): IT Services and IT Consulting
- [Financial Services Companies in Irvine](https://enrich.chat/companies-in/irvine-ca/financial-services/): Financial Services
- [Real Estate Companies in Irvine](https://enrich.chat/companies-in/irvine-ca/real-estate/): Real Estate
- [Advertising Agencies in Irvine](https://enrich.chat/companies-in/irvine-ca/advertising-services/): Advertising Services
- [Construction Companies in Irvine](https://enrich.chat/companies-in/irvine-ca/construction/): Construction
- [Technology and Internet Companies in Irvine](https://enrich.chat/companies-in/irvine-ca/technology-information-and-internet/): Technology; Information and Internet
- [Hospitals and Health Care Organizations in Irvine](https://enrich.chat/companies-in/irvine-ca/hospitals-and-health-care/): Hospitals and Health Care
- [Consulting Firms in Irvine](https://enrich.chat/companies-in/irvine-ca/business-consulting-and-services/): Business Consulting and Services
- [Medical Device Companies in Irvine](https://enrich.chat/companies-in/irvine-ca/medical-equipment-manufacturing/): Medical Equipment Manufacturing
- [Electrical and Electronics Manufacturers in Irvine](https://enrich.chat/companies-in/irvine-ca/appliances-electrical-and-electronics-manufacturing/): Appliances; Electrical; and Electronics Manufacturing
- [Manufacturers in Irvine](https://enrich.chat/companies-in/irvine-ca/manufacturing/): Manufacturing
- [Staffing and Recruiting Firms in Irvine](https://enrich.chat/companies-in/irvine-ca/staffing-and-recruiting/): Staffing and Recruiting
- [Telecommunications Companies in Irvine](https://enrich.chat/companies-in/irvine-ca/telecommunications/): Telecommunications
- [Insurance Companies in Irvine](https://enrich.chat/companies-in/irvine-ca/insurance/): Insurance
- [Nonprofit Organizations in Irvine](https://enrich.chat/companies-in/irvine-ca/non-profit-organizations/): Non-profit Organizations
- [Motor Vehicle Manufacturers in Irvine](https://enrich.chat/companies-in/irvine-ca/motor-vehicle-manufacturing/): Motor Vehicle Manufacturing

**Short answer:** Browse the bigger companies headquartered in Irvine, CA by industry. Each page lists up to 25 of the biggest by headcount range, what they do and how big they are.

## Key takeaways

- Each page lists up to 25 of the biggest companies in one industry.
- Sizes are ranges, never exact headcounts.
- Ask your AI agent to use www.enrich.chat to find the people at any of them.

## Frequently asked questions

### How are the companies chosen?

Companies shown have a working website that matches their name and list Irvine, CA as their headquarters. The biggest by headcount range come first.