Ideogram is the strongest fit here because it generates images with accurate text rendering, offers preset canvas sizes suited to ad and social formats, and comes in at a low starting price of $7/mo. It handles typography inside visuals far better than most image generators, which matters a lot for ad creatives. Midjourney is worth considering when raw visual quality and artistic polish are the priority. DALL-E works well if you are already paying for ChatGPT Plus and want a quick integrated option. Stable Diffusion is a free self-hosted alternative if budget is the main constraint.