Can you run locally ? Unfortunately, I feel like next year it won't be a thing for commoners, Stable diffusion 1.5 works well with a gaming GPU, but feel like that XL requires a high-end GPU even by today's standard, and I guess that next versions will requires professional grade workstation with multiple GPU. If 1.5 is fine, run it at home.
Online, I use getimg.ai, the main reason is that it runs XL and I can buy credit packgare rather than a monthly subscription
Still online, Bing image creator includes DALL-E 3 and has some free generation each days
I heard good thing about vast.ai a GPU rental service, but I haven't tried it yet. Unlike the others it's more "rent a PC to generate images rather than an online generator"