Meta has launched Threads, a text-centered social network built by the Instagram team, in more than 100 countries and attracted more than 30 million sign-ups in less than 24 hours, instantly creating the largest new challenge yet to Twitter’s position as a platform for real-time public conversation.

Threads went live Wednesday evening in the United States and other markets, allowing users to sign in with existing Instagram credentials, carry over their usernames and choose to follow many of the same accounts. Meta’s July 5 launch announcement says posts can contain up to 500 characters and include links, photos and videos as long as five minutes. The company also says it intends to make Threads compatible with ActivityPub, the open protocol used by Mastodon and other decentralized social services, although that interoperability is not available at launch.

Instagram gives Threads a distribution system competitors do not have

The striking feature of Threads’ debut is not simply that another Twitter alternative exists. Mastodon, Bluesky, Post and other services have already tried to attract people dissatisfied with Twitter. Meta enters with a structural advantage: Instagram already has a global user base measured in the billions, and Threads turns that installed base into a near-frictionless acquisition funnel.

Users download a separate Threads app, but registration depends on an Instagram account. The onboarding process can import profile information and offer to follow the same accounts a person already follows on Instagram. TechCrunch described the launch as an unusually direct attempt to use Instagram’s social graph to seed a new conversation network rather than asking users to rebuild their relationships from zero.

That advantage was visible almost immediately. Mark Zuckerberg said the service reached two million sign-ups in roughly two hours, five million after about four hours and 10 million within seven hours. By Thursday morning, he said Threads had crossed 30 million. A contemporaneous signup tracker documented the milestones as Meta disclosed them, while noting that rapid registration does not yet answer the more important long-term question of whether users will return regularly.

The Washington Post reported that the pace amounted to more than one million new accounts per hour during parts of the first day. That scale is difficult for smaller rivals to match because Meta can promote Threads directly inside Instagram and use existing identity, follower and creator relationships to reduce the cost of switching.

The product is intentionally simple — and visibly unfinished

At launch, Threads resembles Twitter in its basic interaction model: short text posts, replies, reposts and likes arranged in a scrolling feed. But several familiar Twitter features are missing. There is no fully chronological following feed, no hashtag system, no robust keyword search, and no direct-messaging function inside Threads. The initial feed mixes posts from followed accounts with algorithmically recommended material.

Instagram head Adam Mosseri has acknowledged that the first release is incomplete. Engadget reported Thursday that Mosseri said the team intends to add features such as a following-only feed and improve the product after seeing how people use it. That approach lets Meta enter the market quickly while Twitter is undergoing significant changes, but it also means early engagement may depend heavily on novelty and Instagram’s distribution power.

The product’s relationship to ActivityPub could become more consequential than its missing launch features. Meta says compatibility would eventually allow Threads users to interact with people on other services that implement the same protocol and could permit users to move audiences between compatible platforms. That is a notable departure from the tightly controlled social graphs that have historically defined Facebook and Instagram, though the technical and policy details remain unresolved.

Timing turns Threads into a direct test of Twitter’s network effects

Threads arrives during a turbulent period for Twitter under Elon Musk. The company has cut staffing, changed verification, altered access to application-programming interfaces and introduced limits that affected how many posts users could view during the weekend before Threads launched. Those moves have created openings for competitors but have not yet displaced Twitter as a central venue for journalists, politicians, brands, public agencies and highly engaged communities.

Axios characterized Threads as Meta’s clearest effort to capture the public-conversation market at a moment when Twitter users are actively testing alternatives. The strategic question is whether Meta can reproduce Twitter’s distinctive use case — rapid, interest-based conversation around news and live events — without simply producing another version of Instagram’s creator-centered feed.

The launch also intensifies a personal and corporate rivalry between Zuckerberg and Musk. Another Axios report noted the increasingly direct competition between the two executives and their companies. The business contest matters more than the personalities: Twitter’s value depends heavily on network effects, and a rival becomes more useful as more of the accounts a user cares about are present. Meta is trying to compress that network-building process into days by importing Instagram relationships.

Twitter has already signaled that it views the challenge seriously. Lawyers for the company have accused Meta of using former Twitter employees and confidential information to build Threads, allegations Meta has denied. As of Saturday, those claims remain assertions rather than findings, and there is no public adjudication that Threads improperly used Twitter intellectual property.

Europe is a conspicuous gap in an otherwise broad launch

Threads is not launching in the European Union at the same time as the United States, United Kingdom and many other markets. The absence matters because the EU is one of the world’s largest digital markets and is implementing new rules governing large technology platforms.

Euronews reported Thursday that Meta is holding back the EU launch while it evaluates regulatory requirements, including questions about data sharing between services under Europe’s Digital Markets Act. The Irish Data Protection Commission has said it did not block the service; Meta chose not to launch it in the region at this stage.

The data model is relevant because Threads is closely tied to Instagram. App-store disclosures indicate the service may collect a broad range of information associated with identity, usage, contacts and other categories. A TechCrunch analysis highlighted the privacy and competition questions created when a dominant platform can combine data and distribution across multiple services. Those issues could influence both whether Threads enters Europe and what form the product ultimately takes there.

Thirty million registrations are a launch metric, not a verdict

The first-day numbers are extraordinary, but they do not establish that Threads will become a durable rival to Twitter. Social networks depend on habitual use, creator participation, conversational density and the ability to surface relevant information. A person can sign up in seconds through Instagram and then decide days later that the product adds little to existing habits.

That distinction is particularly important because Meta can create enormous initial awareness at low marginal cost. The harder problem is retention. Threads must persuade people to post original material, reply, follow news and return throughout the day rather than treating the app as a one-time curiosity linked to Instagram.

Still, the launch changes the competitive landscape immediately. Previous Twitter alternatives have generally faced a cold-start problem: too few users attract too little content, which in turn makes it difficult to recruit more users. Threads has bypassed much of that problem by using Instagram’s identity system and social graph. Whether those imported connections produce the same type of public conversation is now the central product question.

As of Saturday, the relevant fact is not a later milestone but the first one: more than 30 million people joined in less than a day, and Meta has placed a functioning, globally distributed text network directly beside Instagram. Twitter still possesses a mature community and a deeply embedded role in real-time information. Threads now has something no previous challenger has brought to the contest on day one — comparable corporate infrastructure and an enormous ready-made audience from which to build.