To be eligible for Startup India registration, your business must meet the following criteria:

Age: Be less than five years old from the date of incorporation/registration.
Turnover: Have a turnover not exceeding INR 25 crore in any preceding financial year.
Innovation: Work towards innovation, development, deployment, or commercialization of new products, processes, or services driven by technology or intellectual property.
Legal structure: Be a Private Limited Company, Limited Liability Partnership (LLP), or a One Person Company (OPC).
Originality: Not be formed by splitting up or reconstructing an existing business.
https://www.registerkaro.in/startup-india-registration