Each publisher sets their own minimum campaign budget, and your budget needs to meet that minimum for them to be an eligible option. Minimums vary publisher to publisher, so a title that's out of reach on one budget might be well within range on another.
For the standard minimum campaign budget, and when a lower total budget may be possible, see What's the minimum budget to run a campaign?
If you're set on a specific publisher whose minimum you haven't quite hit, reach out to our support team — they can advise on minimum budgets and point you toward other publishers who might be a strong fit within your range.
If you'd find it helpful to talk it through in more depth, you can also book a demo with our team.
To boost your competitiveness on a lower budget, consider raising your CPC to make a standout impression. Happy pitching!