What Happened to Twitter? Understanding the X Rebrand

Twitter, now officially rebranded as X, is a real-time social networking platform where users share short posts (formerly called tweets) with images, video and links, alongside live audio, direct messaging, and an integrated AI assistant called Grok. SpaceX reported roughly 550 million monthly active users across X and Grok as of March 2026, a figure disclosed in its filing with the US Securities and Exchange Commission and the first audited user count published since Twitter went private in October 2022.

For UK and Irish businesses, the platform still matters for one simple reason: conversations happen here first. News breaks on X before it breaks anywhere else, industry figures argue in public, and customers vent, praise and ask questions in real time. Whether that is worth your time depends on your audience and your goals, which is the first question ProfileTree’s social media marketing team works through with any client weighing up a new channel. This guide sets out what the platform is, how it actually works in 2026, and where it fits into a wider marketing strategy.

What Is Twitter (X)? A Modern Definition

Twitter launched in 2006 as a microblogging service built around a strict 140-character limit. Elon Musk bought the company in October 2022 and rebranded it to X in July 2023. The core idea has not changed: short, public posts that anyone can see, reply to, Twitter launched in 2006 as a microblogging service built around a strict 140-character limit. Elon Musk bought the company in October 2022 and rebranded it to X in July 2023. The core idea has not changed: short, public posts that anyone can see, reply to, repost or quote.

The Core Concept of Microblogging

A microblog is a shortened form of blogging, built for quick updates rather than long articles. On X, a standard post can run to 280 characters for free accounts, with Premium subscribers able to post considerably longer text, along with video, images, polls and links. The feed rewards immediacy and reach rather than depth, which is why X still functions as an early-warning system for breaking news, product launches and public commentary.

How Many People Actually Use the Platform?

For three and a half years after Twitter went private, there was no audited user figure in the public record. That changed on 20 May 2026, when SpaceX filed its S-1 registration statement with the US Securities and Exchange Commission ahead of its June flotation. Because SpaceX now owns the platform, X’s numbers had to be disclosed.

Two details there reset assumptions that a lot of marketing advice still runs on. The audited figure of 550 million sits roughly 50 million below the 600 million-plus number X had repeatedly claimed in public since 2023. And daily posting volume of around 350 million is well down on the 500 million per day the company reported in 2023.

So the platform is large, still growing modestly, and quieter than its own public claims suggested. If an agency or tool vendor is still quoting 600 million users to you, they are working from superseded numbers.

What Is Twitter (X) Used For?

Four use cases account for most activity on X: following breaking news, joining public conversations around an industry or topic, contacting brands and public bodies, and building an audience. Business accounts mostly live in the last two.

The platform serves those jobs unevenly. For a UK SME, the honest position is that X is strong at a narrow set of tasks and middling at the rest.

The mismatch that shows up most often in small business accounts is between effort and job. A company posting one polished graphic a week to build awareness will usually be outperformed by one posting short, specific observations three or four times a week. Frequency and specificity carry more weight than production value here, which is close to the opposite of what works on Instagram.

If verification is part of the plan, the badge types, eligibility rules and current pricing are covered in ProfileTree’s guide to getting verified on X.

Why Did Twitter Rebrand? The Story So Far

Understanding the rebrand matters for anyone still searching “Twitter” out of habit while the platform itself now runs as X. This is not a coat of paint; it reflects Musk’s stated ambition to build an “everything app” that eventually combines social posting, payments, job listings and AI tools in one place, similar in spirit to how WeChat operates in China. Some of that vision has landed (Grok, creator payouts, longer video); much of it is still aspirational. The everything-app ambition is also restated in SpaceX’s own IPO prospectus, so the strategic direction has now survived two changes of corporate parent.

Elon Musk’s Acquisition and the “Everything App” Vision

Musk completed his $44 billion acquisition of Twitter in October 2022 and renamed the company X Corp in 2023, with the app itself following as X. Since then, the platform has moved from a straightforward advertising model toward paid subscriptions, creator revenue sharing and, more recently, an AI assistant built directly into the timeline. For businesses, the practical effect is that X now behaves less like a pure broadcast channel and more like a hybrid of a social network, a customer service desk and a search tool.

Who Owns X Now?

Ownership has changed hands twice since the rebrand, and the current answer surprises most people. Musk’s AI company xAI acquired X’s parent, X Holdings Corp, in March 2025. SpaceX then acquired xAI outright on 2 February 2026, folding the social platform, the Grok models and xAI’s compute operation into the rocket company. In July 2026, xAI was dissolved as a brand and relaunched as SpaceXAI, a division of SpaceX.

The chain now runs: the X app sits under X Corp, which sits under SpaceXAI, which sits under SpaceX. Following SpaceX’s June 2026 listing on the Nasdaq, X forms part of a publicly traded group for the first time since 2022, which is precisely why audited platform figures are available again.

There is a commercial read here worth taking seriously. The AI segment that X now sits inside reported $3.2 billion in revenue for 2025 against a $6.4 billion operating loss, with capital spending of $12.7 billion over the same year. A platform whose parent values it substantially as a real-time data source for AI training, rather than as an advertising business that must pay for itself, is a platform where product priorities can shift quickly and without much warning. Plan your presence so that it survives that.

Old Twitter Terms vs Current Terms

Anyone returning to the platform after a break will find the interface familiar, but the vocabulary has shifted. This quick-reference table maps the change:

Core Features Explained

Once the terminology is straight, the mechanics are relatively simple to pick up. Businesses generally need to understand four things: how posts work, what the subscription tiers actually buy you, how live audio and messaging function, and how the algorithm decides what gets seen.

Posts, Reposts and Replies

A post can include up to four images or a single video, and free accounts can attach videos up to two minutes and twenty seconds long. Reposting shares another account’s content directly to your followers, while quoting adds your own commentary above the original post. Threads, several posts linked together, remain the preferred format for longer explanations or step-by-step advice, and well-constructed threads can outperform single posts significantly for reach.

Businesses managing an active presence often benefit from planning content in advance rather than posting reactively, particularly around industry events or seasonal moments relevant to a UK or Irish audience.

X Premium, Verification and Character Limits

X currently runs three consumer subscription tiers, alongside a separate Verified Organisations programme for businesses. Pricing is set in local currency and changes periodically, so treat the figures below as indicative rather than fixed:

Free accounts are capped at 280 characters per post. Premium subscribers can post substantially longer text, which has made X more viable for short-form thought leadership than it was in the 140-character era. Given how often subscription pricing shifts, always check current rates directly with X before budgeting for a business account.

One figure from the SpaceX filing is worth weighing before committing to a paid tier. X and Grok together reported around 6.3 million paying subscribers as of March 2026, of which roughly 4.4 million were on X Premium or Premium+. Set against 550 million monthly users, that is fewer than one in a hundred paying for the checkmark. Verification carries far less signalling weight than it did in the Twitter era, and buying it will not, by itself, make an account look established.

Spaces, Direct Messages and Bookmarks

Spaces is X’s live audio feature, useful for Q&A sessions, product launches or informal panel discussions with an audience that can join in real time rather than watching passively. Direct messages remain the standard channel for private customer service conversations, and Premium subscribers get priority placement in each other’s message requests.

Bookmark folders let users organise saved posts by topic, which is a small but genuinely useful feature for anyone using X to track competitor activity or industry commentary. priority placement in each other’s message requests. Bookmark folders let users organise saved posts by topic, which is a small but genuinely useful feature for anyone using X to track competitor activity or industry commentary.

Grok AI and the Creator Economy on X

Two developments separate the current version of X from the platform most people remember: an AI assistant built into the feed, and a functioning path for creators and brands to earn money directly from engagement.

Grok: Built-In AI Assistant

Grok is SpaceXAI’s model, integrated directly into X so that users can summon it within a thread by tagging it, and it can generate real-time summaries of ongoing conversations or breaking news. Access scales with subscription tier: free accounts get a limited number of prompts, Premium opens up a larger allowance, and Premium+ raises the ceiling further. For businesses, Grok’s practical relevance is mostly in research and monitoring: it can surface a live summary of how a topic or hashtag is trending without manually scrolling the timeline.

Adoption is substantial. SpaceX’s filing put Grok at 117 million monthly active users, roughly 21% of the platform’s user base, which makes it the most heavily used AI assistant embedded directly inside a social platform. That integration is the main reason the platform’s owner treats X’s real-time posting stream as a strategic asset.

Getting Paid: Creator Revenue Sharing

X’s Creator Revenue Sharing programme pays eligible accounts based on engagement from verified users. To qualify, an account generally needs an active Premium subscription, a minimum follower count, and a rolling three-month total of verified impressions in the millions. Payouts are processed periodically and vary significantly by region and audience.

This is a genuine incentive for content creators and some brand accounts, though the bar for meaningful income is high enough that most SMEs will get more value from X as a visibility and customer service channel than as a revenue stream in its own right.

Privacy, Moderation and the UK Online Safety Act

Safety and regulation on X are no longer a side issue for UK businesses, particularly since the government’s June 2026 announcement of proposed new rules affecting who can access social media platforms in the first place.

Content Moderation and Community Notes

X relies heavily on Community Notes, a crowdsourced system where users add context to posts that may be misleading. A note only becomes publicly visible once contributors with differing perspectives agree it is helpful, which is designed to reduce one-sided corrections. It is a genuinely useful safety net, though it depends on volunteer participation and can lag behind fast-moving misinformation.

The UK’s New Age Rules for Social Media

On 15 June 2026, the UK government announced that it intends to restrict social media access for under-16s, with regulations expected before the end of 2026 and enforcement beginning in spring 2027. The legal mechanism is Section 70 of the Children’s Wellbeing and Schools Act 2026, which amends the Online Safety Act 2023.

Platforms including X, Facebook, Instagram, TikTok, YouTube and Snapchat would be required to verify the age of UK users. The restrictions run through secondary legislation under the Act rather than a new Bill, so they still need approval by both Houses of Parliament before they take effect. The first regulations are expected to be laid before the end of 2026, and Ofcom is due to report on workable age-assurance methods by the end of October 2026.

Ofcom is responsible for enforcement and can fine non-compliant platforms up to £18 million or 10% of global revenue, whichever is greater. Messaging services, including WhatsApp and Signal, are excluded from the ban’s scope. The government’s announcement of the under-16s restrictions sets out the full details.

For a business running an X account with any UK following, this matters less for the platform itself than for the client base: age verification changes are likely to affect sign-up friction and audience composition on every major platform over the next two years, and it is worth budgeting communication time for customers who ask about it.

Is it Safe for Under-16s?

X’s own minimum sign-up age is 13, but the platform carries unmoderated and sometimes sensitive content that falls well outside a curated experience. Parents and educators generally recommend supervised use at a minimum, alongside the platform’s built-in safety settings for muting keywords and restricting who can reply. The UK’s proposed age rules, once in force, would apply a stricter bar of 16 across the platforms in scope, including X.

Should Your Business Be on X?

For most UK SMEs, the answer is yes only if at least three of the conditions below apply. X rewards consistent participation, and a dormant account with six months of silence does more reputational damage than no account at all.

Score the business against these six criteria. Three or more yes answers suggest the time investment is justified.

1. Your customers or peers are already active there. Search your industry terms and check whether recent posts come from real practitioners rather than automated accounts.
2. Someone can post at least three times a week. That means genuine participation, not a scheduled queue of recycled blog links.
3. You have views worth stating publicly. The feed rewards a clear point of view. Neutral corporate updates go nowhere.
4. Journalists or trade press matter to your business. Media contacts still use X heavily for sourcing, which makes it valuable for PR-led firms.
5. You can handle complaints in public. Customer service on X happens in front of an audience, and slow replies are visible to everyone.
6. You are selling to B2B or technical buyers. Consumer retail audiences have largely shifted towards Instagram, TikTok and Threads.

Businesses scoring below three usually see better returns putting the same hours into LinkedIn, a mailing list, or the website itself. That is a resourcing judgement rather than a verdict on the platform, and it belongs inside a wider digital marketing strategy rather than being settled channel by channel. Revisit it once a year as the audience mix changes.

Getting Started: Setting Up a Business Account

Setting up is simple enough, but a professional presence needs more thought than the sign-up form asks for.

Creating Your Account and Choosing a Handle

Registration needs a name, a working email address and a secure password. The handle, the unique username shown after the @ symbol, should match the business name wherever it is available. If the exact match is taken, a close variant that is still easy to search for and remember works better than an unrelated string of characters. 

Optimising Your Profile for Business

A profile photo using the company logo, a header image reflecting current campaigns or services, and a bio that states clearly what the business does within the 160-character limit all matter more than they might seem to. ProfileTree’s guide to using the platform’s discovery and trending features covers this in more detail for accounts starting from zero followers.

UK and Irish Business Growth

Beyond the basics, X still delivers measurable value for businesses willing to treat it as a two-way conversation rather than a one-way announcement feed.

Content That Performs

Posts combining an image or short video with a clear, specific point tend to outperform text-only updates. Threads work well for breaking down a process or explaining an industry change step by step, and ProfileTree’s wider content marketing approach applies the same principle: specific, useful content beats generic promotional posts on every platform, X included.

“Starting on X can feel overwhelming, but the key is authenticity and consistency. Businesses that treat it as a conversation platform rather than a broadcast channel see far better engagement and conversion results,” says Ciaran Connolly, founder of ProfileTree.

For B2B accounts specifically, X remains a useful complement to LinkedIn rather than a replacement for it. ProfileTree’s guide to LinkedIn for business covers where the two platforms diverge in tone and audience intent.

Measuring Results Beyond Follower Counts

Follower count is the least useful metric available. Engagement rate, click-through rate on linked content, and conversion tracking through UTM parameters give a far more accurate picture of whether X activity is contributing to actual business outcomes. Sentiment around brand mentions is worth monitoring too, particularly for businesses using X as a customer service channel, where response speed within the first hour has a measurable effect on public perception. Accounts without a paid subscription can still get a reasonable read on reach and engagement using free X and Twitter analytics tools.

X vs Threads, Bluesky and Mastodon: How the Alternatives Compare

X is no longer the only real-time, text-first platform, and it is worth knowing where the alternatives currently stand before committing a content calendar to just one of them.

Meta reported Threads passing 500 million monthly active users in June 2026. On daily usage, the gap is starker still: Similarweb put Threads at 147 million daily active users on mobile in July 2026, against 123.7 million for X, a lead Threads first took in late 2025 and has held since.

Bluesky has moved the other way. Similarweb recorded 10.4 million monthly active users on its mobile app in June 2026, down 27% year on year and around half its late-2024 peak, though the users who stayed are engaged. The company replaced chief executive Jay Graber with Toni Schneider in March 2026 and has shifted emphasis towards the underlying AT Protocol rather than the app itself.

For a UK or Irish business choosing where to spend limited time, that reshapes the calculation. Threads now offers more reach, particularly for brands with an existing Instagram audience worth carrying over. X still leads on real-time news relevance, B2B commentary and access to journalists, which is why it keeps its place in most professional media plans despite the smaller audience. Bluesky is no longer a serious volume play for most small businesses.

Where It Fits Into a Wider Digital Strategy

X rarely works in isolation. The strongest results come from treating it as one channel within a broader plan: repurposing blog and video content into posts and threads, feeding customer questions from X into a proper content marketing calendar, and tracking share of voice against competitors through consistent monitoring rather than sporadic check-ins. The same logic extends outwards, and ProfileTree’s guide to cross-promotion strategies sets out how to point a YouTube audience at a newsletter, or a LinkedIn following at a blog, without simply duplicating the same post everywhere.

Businesses still deciding whether X deserves a place in that plan can find useful context in ProfileTree’s overview of online community statistics, which covers the resourcing question most SMEs face before committing to an active presence on any real-time platform.

A live channel also needs a response plan for when something goes wrong publicly. Given how quickly a single post can travel, the groundwork is worth having in place before, not during, a bad news cycle.

If X is one part of a wider push into short-form platforms, it is worth reading how the same principles apply on Snapchat, where the format and audience differ but the underlying content discipline does not.

Building a genuinely useful X presence takes ongoing effort rather than a single setup session: consistent posting, honest engagement, and a willingness to adapt as the platform’s features, owners and rules keep shifting. ProfileTree works with SMEs across Northern Ireland, Ireland and the UK to build social media strategies that connect X activity to the rest of a business’s digital marketing, from content planning through to measurement. Get in touch to talk through what a working strategy could look like for your business.

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