The names of funding rounds, e.g. pre-seed, seed, seed+, Series As, Bs and Cs, have become marketing terms as much as a narrowly and clearly defined type of financing.
Mattias Ljungman of Moonfire has written the article Seed is broken. Here is how to fix it to add clearer thinking to this.
His slicing of seed into Seed Inception (with the subsets of Discovery, Classic and Jumbo) and Seed Expansion (subsets Classic and Jumbo) is a good framework to think (and talk) more clearly about the different types of seed rounds.
