The Beta Party is a party that celebrates the Beta Testing time of Animal Jam before it was officially released. The party was introduced on July 23, 2014. This party is available for all Jammers around the time of Animal Jam's original open-beta stage. On its first release in 2014, it left near the fourth anniversary of Animal Jam's official release. The party returned on July 13, 2017, and left after three days. It returned again on July 19, 2018. It returned on May 6, 2021, and left on June 3, 2021.
- Despite having names that start with "Beta", none of the items in the store were actually released during Beta Testing; however, they do have an unrefined style similar to the original beta items.
- The setting for this party is a modified version of the original beta den with the addition of an accessible land space near the entrance.
- The music of the party is called "Beta Days" in the Jammer Parties music selection.
- As the party phased out, it was replaced by the AJ Birthday Party that celebrates Animal Jams official release date, which is September 9, 2010.
- Initially, there was no music at this party. However, this was fixed and the music was added in afterward.
- In 2017, before the party was announced in the Jamaa Journal, when a player clicked on the shop the shop pop-up would not open. It was fixed after the party was announced.
- At some point, the background for the party's banner was changed so the background would be reflected horizontally.