How many accounts do an influencer's followers follow? The answer impacts how well your sponsored posts will reach their audience.
Introducing: audience reachability.
Influencer audience reachability helps you understand how likely it is that a creatorās audience will see their posts.
To determine reachability, you need to know how many accounts a creatorās followers are following. If they follow only 100 accounts, thereās a good chance theyāll see every post from the accounts they follow. If they follow 1k+ accounts, their feed will be quite cluttered, and theyāre less āreachableā.
Iāll show you how to do it in just a few clicks using Modash, a tool for finding & analyzing influencers.
Here's the TL;DR:
It looks like this:

Keep scrolling to get the step-by-step of how to do it, or grab a 14-day free trial and try it for yourself. No credit card needed.
After signing up for Modash, youāll land in the Discovery tab. Here, we have two options. You can either start applying search filters to narrow down a database of over 200M influencers, or if you already have a creator in mind, you can enter their username directly. Letās start with the latter.
To look for one specific creator, scroll down past the filters, and find the āSearch by Usernameā field. Make sure youāre on the correct platform too (see Instagram/TikTok/YouTube at the top).

The profile will appear below; simply click to open it.

Youāll land on the creatorās profile analysis. There, youāll find a bunch of information: top audience locations, age & gender breakdowns, top content, influencer lookalikes, engagement rate, fake followers, and⦠audience reachability.

If you didnāt already have creators in mind, you can use Modashās influencer discovery tool to search for new ones. The database includes every creator on Earth with 1k+ followers on Instagram, TikTok, and Youtube ā so no matter your niche, thereās definitely some partners in there for you.
Hereās what it looks like:

Think about who youāre looking for. Shown above, hereās some ideas for starting criteria:
šļøQuick note: Test out 1 to 2 filters at a time and keep narrowing your search until you shortlist a few influencers who best fit your brand.
With these search filters, Modash has given me 49K+ profiles. Next, I could:

From here, the steps are the same as before. Simply open the profile, and check the data.
For an influencerās audience to be as āreachableā as possible, you want their followers to be following as few other accounts as possible. Look for a high percentage of followers following 0-500, and 500-1k accounts. Once you start to get above 1k accounts followed, the chances of them seeing your sponsored posts becomes lower & lower.
You could also look at the creatorās paid post performance. The question you need to answer is: āHow well does this creatorās paid posts perform in relation to their regular posts?ā
Itās not the same metric, but the goal is the same ā you want to know how much of the creatorās audience youāre likely to reach with a paid collaboration. In Modash, that number is available as a percentage:

For example, if an average post gets 10,000 likes, and an average paid post gets 6,364 likes, the paid post performance would be 63.84% as above.
Without software, you can feasibly spot check this. Search through a creator's posts that contain ad disclosure hashtags like #ad, #sponsored (etc.), and manually look at how theyāve performed, then compare to other recent posts. Harder, but doable.
Other than that, theoretically, you could check reachability manually ā checking a handful of followers one by one. Definitely not worth the time though, and nearly impossible for larger accounts.
Lastly, you could check influencer engagement rates. Engagement rate doesn't directly show reachability, but again, the outcome is similar -- a high engagement rate means you're going to reach a higher percentage of their following. Here's a free engagement rate caculator you can use, too.

In case it isnāt obvious, thereās a lot more to check during your influencer vetting process than just reachability. For more on analysis, read: How To Vet & Analyze Influencer Profiles. Hereās the summary of things you should be checking:
Modash can help with most of these, but remember that some are qualitative & subjective (e.g. content quality/relevance/alignment). Add a step in your influencer selection process to answer: do I want my brand to be associated with this creator?
For all the data you need to find & analyze influencers at scale, try a 14-day free trial of Modash š.