Ideogram Writes the Text on the Image. Synthesia Puts That Text in a Spokesperson's Mouth.

Ideogram is the rare image model that puts legible text inside a picture, which makes it the go-to for quote cards, event posters, and sale banners. Synthesia builds a video of a human-looking avatar reading a script, with subtitles and a voice you picked.

They solve different problems. I used Ideogram to make a set of social cards for a webinar, then Synthesia to record the same points as a 90-second explainer. The cards got likes; the video got watched to the end by people who would never read a card.

The overlap is tempting but shallow. You can't make a good avatar video by pointing Synthesia at an Ideogram poster, and you can't make a poster by freezing a Synthesia frame. They are inputs and outputs of the same campaign, not replacements.

Verdict: social and print graphics, Ideogram. Training, onboarding, or explainer video with a face, Synthesia. Buy both when you run a content calendar that needs stills and talking-head clips.