The types of securities companies can issue depend on the type of campaign and raise they wish to have.
For equity crowdfunding, companies are restricted to offering either Equity (Common or Preferred Shares) or Debt. Equivesto operates primarily with companies raising using equity.
Check out Controlling a Business or Shareholders Agreements to learn more about issuing shares and how that impacts your business. Check out Prospectus Exemptions to learn more about the legal framework that allows you to issue shares.