Somebody else’s audience is a list you can work.
Four jobs people actually hire a follower list for — and, at the bottom, the numbers from a real production dig, because a use case without a yield figure is a brochure.
Build a creator shortlist from a competitor's audience.
The micro-creators already following a brand in your category chose that world — they are warm by definition. Scan deep, filter to the follower band your budget supports, sort by median engagement, and narrow thousands of strangers to the hundred worth a first message. The shortlist inherits the taste of the audience it came from.
Find the nano-creators no database indexes.
Creator marketplaces index people who are already discoverable — which is precisely why their inboxes are full. A follower list surfaces the 2,000–5,000 follower accounts that appear in no database at all. On a measured pool of exactly that band, 1 in 5 published a contact email and over half carried an external link. Their reply rates are a different sport.
Map a niche before you spend on it.
Pick the account everyone in a category follows and mine it. Segment the public rows by follower band, engagement and business-account status and you have the shape of the market — how much of it is fans, how much is peers, how much is brands — before a dollar of media goes anywhere. The histogram is the market map.
Vet a partner's real audience.
A media kit is one number chosen by the person selling. Scanning who actually follows an account answers a different question: how much of the audience is private, how many are follow-for-follow shells, how many have posted this year. The gap between the kit and the core sample is the negotiation.
What one production scan actually returned.
September 2026, a 4.4M-follower account, hunting the 2,000–5,000 band for a customer. These are the job’s own stats, not projections:
A caveat worth stating: follower count alone will not give you a clean pool. Accounts with zero posts and follow-for-follow accounts both clear a band filter. The engagement and ratio filters exist because that is the difference between 250 rows and 250 rows worth reading.
Whose audience would move your needle?
Name the account. The drill does the rest.