Threads vs Bluesky: Real User Numbers and Which to Pick

Start with the number everyone asks for. Meta's Threads announcement from June 2026 says the app reached 500 million monthly active users, a company-reported figure in that post. Threads also shares infrastructure and an identity system with Instagram, which matters when you estimate how many of those people actively post text rather than lurk.

Bluesky's Series B post from March 2026 reports a different shape of number: Bluesky grew from 13 million to over 43 million global users since its Series A round. That post calls them global users, not monthly active users, and it does not fold independent servers into the 43 million. When you want an activity estimate instead, Similarweb estimates reported by TechCrunch put Bluesky's mobile app at 10.4 million monthly active users in June 2026, down 27.2 percent year over year.

So the honest scoreboard reads: 500 million company-reported monthly actives on Threads, against 43 million-plus self-reported global users and roughly 10 million third-party-estimated mobile actives on Bluesky. Depending on which pair you compare, Threads lands somewhere between 10 and 50 times larger. Neither side is lying; they are measuring different things, and anyone quoting only the flattering half of each is selling you a take.

Threads launched in July 2023 with an advantage nobody else could copy: it borrowed Instagram's graph, so a huge pool of accounts existed on day one. Meta now attributes the milestone growth to communities, groups that form around topics like books, basketball, and parenting, and it keeps shipping for them, from community icons to local communities with native-language tags in Japan, Korea, and Taiwan. If you are moving from Twitter to Threads, that interest-community structure is what catches you.

Bluesky grew the opposite way. It opened the app to the public in February 2024, after an invite-only period, and compounded through the developer community around its open protocol. The official account of that growth is the jump from 13 million to over 43 million users between funding rounds. The nuance is activity: by mid 2026, third-party estimates showed mobile monthly actives shrinking while the protocol itself kept spreading into other apps and services.

Culture follows the growth story. Threads conversation clusters around interest communities and casual sharing, with a ranking system steering discovery. Bluesky skews toward journalists, researchers, and open-web builders, and its power users care deeply about feed control and data ownership. Neither culture is better; they reward different posting styles, and both carry real platform risk for creators who build on rented ground.

Threads gives you 500 characters per post, plus photos and videos, and the ability to edit a Threads post within 15 minutes of publishing. The edit only changes text, and interactions that happen before you save still stand, but it removes the delete-and-repost dance for typos. Formatting tricks like line breaks and bold text carry their own weight on a text-first feed.

Bluesky gives you a 300-grapheme limit per post and up to four images. Bluesky added drafts in February 2026, a long-requested feature, but as of late October 2026 no native edit has shipped in the official app. Third-party workarounds delete and repost, or overwrite the stored record. They are not an official edit. If you typo, you live with it or delete.

The 500 versus 300 gap sounds small and is not. Two hundred characters are a full setup line, a qualifier, or a call to action. Posts written at the Threads limit need real compression before they fit Bluesky, which is one reason blind cross-posting reads badly on one platform or the other. Treat the compression as a quality habit too: trimming a post to fit 300 graphemes usually tightens the argument, even for the longer Threads version you keep.

Threads runs one company-built ranking system with escape hatches. There is a chronological Following feed and a ranked feed, plus two 2026 tuning controls: Dear Algo and Your Algo let you tell the system to show more or less of a topic, with requests lasting one, three, or seven days. Your Algo's June 2026 rollout started in the US, Canada, the UK, Australia, and New Zealand, so do not assume every account has it. You can influence the algorithm; you cannot replace it.

Bluesky runs on the AT Protocol, an open standard where the feed market is competitive. The default app ships a Following feed and discovery surfaces, and anyone can build a custom feed algorithm you subscribe to, which means two readers can each follow a different version of the platform. Discovery still favors posting into active topic feeds rather than one big ranked pool.

Practically: Threads suits you when you want one large pool and algorithmic distribution doing outreach for you. Bluesky suits you when your niche has already built its own feeds and gatekeepers you can earn your way into.

Threads monetizes with advertising. On January 21, 2026, Meta announced it was expanding ads to all users worldwide, with the expansion starting the following week and possibly taking months, using image and video formats. Meta did not say how often ads would appear. Treat organic reach as the asset and plan monetization through brand deals, affiliate marketing on Threads, and your own products.

Bluesky raised a $100 million Series B in April 2025. The post frames that raise as funding for the open social web. Reported Bluesky+ subscription mockups point to paid features such as higher-quality video uploads, post analytics, and profile customization, at roughly $8 a month. Treat the $8 figure as a mockup price, not a launched plan.

For your revenue math the difference is indirect but real. A bigger pool with ads means more competition for attention inside one ranked feed. A smaller pool has a lower ceiling, and early loyalty inside a niche can run deeper.

Start with the unit, not the headline. Meta's June 2026 figure is 500 million monthly active users. Bluesky's Series B post says over 43 million global users. Similarweb estimates reported by TechCrunch put mobile monthly actives at 10.4 million in June 2026. A monthly active user, a global user count, and a third-party mobile estimate are not interchangeable, so do not divide one by another and call it reach.

Then test the writing constraint, not a generic platform quiz. If your posts need the longer Threads limit, or you need a native edit, Threads is the practical primary. If your niche already has custom feeds you can earn a place in, Bluesky can be the primary even with the smaller active pool. Do not rerun the Threads vs X decision framework here. That post already covers text-first creators choosing between those two.

If Threads becomes your primary, consistency beats intensity, and an approval-first Threads scheduler keeps a queue moving without dumping raw drafts on your audience. If Bluesky wins, keep the Threads profile warm anyway: audiences move, and the cheapest insurance is a second account that already exists.