How many followers does Tom Costello have on Bluesky?

Tom Costello (@tomcostello.bsky.social) has 3,878 followers on Bluesky. The count is refreshed continuously from the public AT Protocol.

When did Tom Costello join Bluesky, and how old is the account?

Tom Costello joined Bluesky in September 2023. The @tomcostello.bsky.social account is 2 years old. Searches for Tom Costello age often mean a personal age, which we do not publish. The figure here is the account age only.

How many posts has Tom Costello published?

Tom Costello has published 198 posts on Bluesky. That is about 0.2 posts per day over the life of the account.

Is Tom Costello verified on Bluesky?

@tomcostello.bsky.social does not currently show a Bluesky verification. Many real accounts on Bluesky are unverified, since verification is still rolling out.

What does Tom Costello post about?

Tom Costello is classified under Science in our directory. Bio: "research psychologist. beliefs, AI, computational social science. assistant prof at Carnegie Mellon".

Tom Costello Bluesky Profile Stats

@tomcostello.bsky.social

English ScienceTier C

View on Bluesky

Account age: 2 years (joined September 2023)

Tom Costello Bluesky stats, updated continuously. @tomcostello.bsky.social has 3,878 followers and 198 posts on Bluesky. Account age: 2 years (joined September 2023).

Followers

3.9K

Growth (7d)

Following

243

Posts

198~0.2/day

Influence

Follower growth

2026-06-14+5 over 2 days2026-06-22

Bio

research psychologist. beliefs, AI, computational social science. assistant prof at Carnegie Mellon

Notable followers

The biggest accounts in our directory following @tomcostello.bsky.social.

David Rand32K Nicholas A. Christakis29K Nature Reviews Psychology18K Cat Hicks15K Darby Saxbe14K

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Tom Costello on Bluesky - frequently asked questions

How many followers does Tom Costello have on Bluesky?: Tom Costello (@tomcostello.bsky.social) has 3,878 followers on Bluesky. The count is refreshed continuously from the public AT Protocol.
When did Tom Costello join Bluesky, and how old is the account?: Tom Costello joined Bluesky in September 2023. The @tomcostello.bsky.social account is 2 years old. Searches for Tom Costello age often mean a personal age, which we do not publish. The figure here is the account age only.
How many posts has Tom Costello published?: Tom Costello has published 198 posts on Bluesky. That is about 0.2 posts per day over the life of the account.
Is Tom Costello verified on Bluesky?: @tomcostello.bsky.social does not currently show a Bluesky verification. Many real accounts on Bluesky are unverified, since verification is still rolling out.
What does Tom Costello post about?: Tom Costello is classified under Science in our directory. Bio: "research psychologist. beliefs, AI, computational social science. assistant prof at Carnegie Mellon".