The difference between a seed round and a pre-seed round is the amount of funding raised and the stage of development of the company. A pre-seed round is a pre-institutional seed round that either has no institutional investors or is a very low amount, often below $150k. On the other hand, seed rounds are among the first rounds of funding a company will receive, generally while the company is young and working to gain traction.

The term angel round is used to describe an early stage funding round where angel investors invest their own money in exchange for equity ownership. The difference between angel investors and seed funding is that angel investors are individuals who invest their own money in early-stage businesses, whereas seed funding is typically provided by venture capitalists and investment firms in exchange for an ownership stake in the company.