There are a couple of alternatives, but, as the commentators above have quite correctly noted, it depends on the "specs" of your presentation.
When I needed to make a user story video, I used Animaker and I thought that they were quite good. I thought the characters were appealing, and the video-making platform was quite easy to use as well. Although it is a subscription-based platform for making animated videos, they have a free tier with a few characters. You can make videos of up to 2 mins and export them in SD quality on a free tier.
Alternatively, if you know what you want to make and how to make it, GoAnimate has 14 days free trial. If you manage to make all you want in 14 days, you can probably have your video. But I personally have not tried it and cannot advise you on how easy/intuitive it is to use and how appealing the characters/scenes are.