Animeseason provide anime that was release in early 2000 and up to the recent date. They also guarantee that all anime episode is complete. They often post famous anime and anime produce by big companies whenever the Release season of anime comes.
Narutowire Hundreds or even thousand of anime series, and i don't really know which is the oldest ones, but if you cant find the anime you're looking for in animeseason, Narutowire is good for backups the only problem is that sometimes other episodes of their anime are missing. This site also provide mangas and other stuff related to anime.
Pls visit this sites and support them TY