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Ex-Tweeters Are Moving to Twitter Alternative Mastodon: How to Sign Up

The social network Mastodon has become a new home for Twitter refugees. Here’s how to get started.

As Elon Musk drama continues to roil Twitter, a number of users are leaving the site for good. According to The Guardian, market research firm Insider Intelligence predicts that Twitter will lose more than 30 million users over the next two years.

Many of those people opting out of Twitter are pivoting to the decentralized social network Mastodon. One of the biggest obstacles for would-be Mastodon users, however, is its confusing registration system. But once you get past the initial learning curve, the sign-up process isn’t more difficult than starting a new email account.

Here’s the step-by-step process for creating a Mastodon account and getting started on the growing social network. For more about social media, here’s how to download your Twitter archive.

How do I join Mastodon?

Unlike Twitter, Mastodon is not a single website: It’s a decentralized network made up of thousands of websites talking to each other. To start posting on Mastodon (which until quite recently was called “tooting“) and following other people, you’ll need to create an account on a specific Mastodon server or “instance.”

To start following people and posting messages on the Mastodon social service, you begin by joining one specific instance. Each server (if open for registration) has its own sign-up process, but the majority only require a username, email address and password.

Once you’ve joined a Mastodon instance, however, you’re not limited to just following people and posts on that server. You can follow, favorite, reblog or reply to any Mastodon account that’s connected to the larger Fediverse.

How do I decide which Mastodon server to join?

The Mastodon organization provides a partial list of servers — about 100 — on its joinmastodon.org site. You can filter the servers by geographic region, language, topic registration process and whether or not they’re hosted by individuals or organizations. All servers on the official Mastodon site have agreed to follow the best practices of the Mastodon Server Covenant.

If you’re just testing Mastodon out, you might consider one of the official server instances run by the Mastodon organization. While the first and biggest — mastodon.social — has temporarily paused registration, a newer mastodon.online server is still open and picking up the slack.

If you want a bigger list of Mastodon servers to review, your best bet right now is instances.social, which offers a sortable list of about 4,000 Mastodon servers, as well as a wizard-style app that helps you choose a server that fits your requirements.

The site provides useful data about each Mastodon instance, including number of users, number of “statuses” (posts), server uptime percentage and which versions of the Mastodon software it is running. It also lets you filter servers by language; minimum/maximum number of users; and prohibited/allowed content such as nudity, pornography, advertisements or entertainment spoilers. You can also click any instance name — fosstodon.org, for example, a server devoted to open-source software — to read a brief description of the community.

Once you’re actually on a Mastodon site, you can learn about the instance from its “about” page, browse community users on its “explore” page or view recent posts on its “public” page.

You should read the server rules for each Mastodon instance to make sure it’s a good fit, but don’t worry too much about which server you join. You can follow users on other servers and join and leave as many Mastodon servers as you’d like. If you do move around, Mastodon allows you to migrate all of your followers and lists with you.

How do I register on a Mastodon server?

Each Mastodon instance will have its own sign-up process, but the vast majority are the same. You provide a username, email address and password, check the box agreeing to the terms of service and server rules, and click “Sign Up.”

You’ll then see a notification asking you to check your email for a verification message. Click the “Verify email address” in that email message, and you’re done. You can now start posting on your Mastodon server and follow anyone in the Fediverse.

Because of the increased traffic to Mastodon servers since Elon Musk’s purchase of Twitter, some of those registration emails are taking a long time to show up or never arriving at all.

When I registered for the mas.to server last week, I got a confirmation email in about 15 minutes. I’m still waiting for a verification email from sfba.social for a registration attempt three days ago. Be patient, and try a new server if you can’t complete the registration for another.

After you verify your email address, your Mastodon account should be up and running. You can start posting or following people, though it will take a while to build up your feed. Web tools like Debirdify and FediFinder can jump-start the process by helping you find your Twitter contacts on Mastodon.

While most Mastodon servers offer the quick registration process described above, other, more private instances will ask that you apply for an invitation to the instance, which requires a manual review and longer registration time.

If you do decide to register on a Mastodon server and make it through the process, come visit me @peterbutler@mas.to to say hi.

For more, learn how social media could be hurting your mental health.

Technologies

Nvidia CEO Jensen Huang emerges as Trump’s top ally in AI safety debate

Jensen Huang’s position as the leader of the world’s most valuable company, has earned him Trump’s ear on the most important topics in AI.

With the debate about regulating artificial intelligence raging in Washington this week, President Donald Trump picked up the phone to call his top ally on the subject: Nvidia CEO Jensen Huang.

“The robots are not going to be taking over the world,” Trump told Huang, who’d put the president on speaker while on stage at the All-In Summit in Los Angeles on Monday. Trump repeated a point he’d made on social media: that mounting AI and data center concerns are a “hoax.”

While other tech leaders like Meta CEO Mark Zuckerberg and Amazon founder Jeff Bezos have cozied up to Trump during his second term, experts told CNBC that Huang is exercising outsized influence in the White House. He’s slated to attend Trump’s high-profile state dinner for Chinese President Xi Jinping next week, according to a person familiar with the matter who asked not to be named due to confidentiality.

Nvidia has been powering the AI boom since before the launch of ChatGPT in late 2022, supplying the graphics processing units used by OpenAI, Anthropic and others to train their models and run large workloads. Revenue surged to $215 billion in the latest fiscal year, up from $17 billion in 2021.

Huang’s position as the leader of the world’s most valuable company and the chipmaker at the heart of the AI boom has earned him the president’s ear on the most important AI topics.

“Trump just likes winners, and Jensen’s very good at speaking his language,” Samuel Hammond, director of AI policy at the think tank Foundation for American Innovation, said in an interview.

An Nvidia spokesperson declined to comment, and White House representatives didn’t respond to a request for comment.

Whether joining Trump for a candlelit dinner at his Mar-a-Lago club in Florida, or closing a keynote by thanking guests for “making America great again,” Huang has learned how to appeal to the president. Trump and Huang have appeared together at least six times in public since the start of the second term, including trips to Saudi Arabia and the U.K., and a recent trip to China via Air Force One.

Huang is pushing for U.S. AI to move faster while some of Nvidia’s most important customers — namely OpenAI and Anthropic — are ramping up pressure on governments to regulate the technology as fears spread about its potential dangers.

An Anthropic researcher, Jacob Coxon, who previously worked at OpenAI, said he quit his job earlier this month because he feared top AI labs are “gambling with our lives.” Coxon’s resignation set off a firestorm on social media, prompting calls for increased oversight from more than 20 members of Congress.

Concerns were already swirling after OpenAI disclosed a significant security incident in July, when two of its models escaped containment, accessed the open internet, and breached the online AI repository Hugging Face to get a better score on a benchmark test.

Anthropic CEO Dario Amodei cited that episode in a bombshell essay a week ago, urging AI developers to slow how quickly they improve their most advanced AI models. Amodei encouraged companies to cooperate directly with the U.S. government, and reiterated his desire for “well-considered regulation of AI.”

Amodei’s “pacing” proposal was endorsed by other industry leaders, including OpenAI CEO Sam Altman, SpaceX CEO Elon Musk and Google DeepMind Chair Demis Hassabis, who agreed on the need for a slowdown and additional oversight.

‘Did no harm’

Huang took a different position.

In public appearances over the past week, the Nvidia CEO brushed off concerns about AI’s risks. He said that predictions of doom aren’t grounded in science, and that model developers are responsible for securing their products before releasing them.

The solution to safety concerns, Huang said in Scotland on Thursday, is “good old-fashioned engineering.”

“There were incidents, and those incidents, thankfully, did no harm,” Huang said.

Huang’s position is largely shared publicly by David Sacks, a venture capitalist who previously served as Trump’s AI and crypto czar. Sacks co-hosts the “All-In” Podcast, which produced Monday’s event that featured the Trump-Huang call.

“The only control or ‘guardrails’ that AI needs is a STRONG AND SMART (High IQ!) PRESIDENT, and the U.S.A. has that, in spades!,” Trump wrote in a post on Truth Social on the same day as the summit.

Before the recent uproar over safety, Nvidia focused its Washington outreach on export controls.

Last year, Nvidia was pushing to sell its AI chips to restricted countries, including China, drawing sharp criticism from U.S. lawmakers.

Some members of Congress, including Sens. Elizabeth Warren, D-Mass., and Josh Hawley, R-Mo., have cautioned that selling Nvidia hardware to China could threaten U.S. national security and narrow America’s lead in AI.

In December, Huang’s strategy paid off. Trump announced that Nvidia was granted permission to ship its H200 chip to Chinese customers, and that the U.S. would collect a 25% fee in exchange.

The H200 announcement drew intense pushback from both sides of the aisle. Huang declined an invitation from Warren to testify before the Senate Banking Committee in June. The following month, a top U.S. trade official confirmed that H200 sales to China were underway.

Profit motive

Nvidia and Huang argued that banning Nvidia exports to China would be against American interests, in part because such a move would spur the world’s second-largest economy and computing market to develop its own cutting-edge AI chips. The H200 is no longer Nvidia’s most powerful chip, as it has shipped two generations of its newer Blackwell processors in the U.S.

But Nvidia’s fate wasn’t entirely up to U.S. lawmakers, as China’s regulators mostly blocked imports of the H200 chips.

Nvidia’s clear profit motive leads some experts to say it takes the concerns expressed by model developers more seriously than those of the chipmaker, because the labs are the ones responsible for the actual AI technology.

“Nvidia is the most aggressive in terms of, let’s just make money,” said Andrew Yoon, a researcher at CivAI, a nonprofit warning about the dangers of AI. “At every turn, they are really trying to just make sure whatever happens is good for Nvidia’s bottom line.”

Nvidia’s ambitions in China will loom large during the state dinner on Thursday, when Trump, Huang and Xi will all be in the same room. The White House is also planning a meeting with major AI executives to coincide with the event, according to CNN. Other industry executives, including Altman, are expected to attend.

But Huang’s presence carries extra weight. During a House hearing on Monday, Treasury Secretary Scott Bessent was asked if Trump understands the threat AI presents.

“I would just say the president is completely aligned with Jensen Huang, the CEO of Nvidia,” Bessent said.

WATCH: Nvidia CEO Jensen Huang says safety is an engineering problem

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Technologies

Iranian President Pezeshkian to travel to New York for UN summit as Trump threatens consequences of no agreement

Iranian President Masoud Pezeshkian is set to attend the UN General Assembly in New York as diplomatic hopes rise, even as U.S. President Donald Trump warns of severe consequences if no deal is reached.

President Masoud Pezeshkian is set to lead an Iranian delegation at the United Nations General Assembly in New York on Tuesday, as fresh optimism emerges for a diplomatic resolution to the Middle East conflict.

According to the semi-official Tasnim news agency, Pezeshkian will deliver a speech before the assembly, outlining Iran’s stance on “international developments,” with special attention to its conflict with the U.S. and Israel.

He is also expected to meet with several world leaders on the margins of the gathering, which runs from Sept. 22 to 26, and Sept. 28.

The Iranian delegation’s participation at the UN has sparked renewed optimism for a diplomatic path out of the war, boosting market sentiment on Monday — equities climbed, oil prices softened, and global bond yields dropped sharply.

However, U.S. President Donald Trump — who has indicated willingness to meet Pezeshkian during the assembly — has warned that Iran’s economy would be devastated or its leadership eliminated if Tehran fails to reach an agreement.

Speaking to Fox News on Sunday, Trump said the only choices available were “wiping Iran out,” or allowing its economy to “rot,” unless a deal is reached.

Meanwhile, Iran’s military said its intelligence pointed to a new, large-scale strike being orchestrated by the U.S. and its allies, cautioning of “painful” retaliation throughout the Middle East. Any regional nations supporting such an attack would be considered participants in the conflict, it added.

“If the U.S. commits any error against the Islamic Republic of Iran, all its positions and interests in the region will face sustained, effective and painful strikes,” the Khatam al-Anbia Central Headquarters of Iran stated, per Tasnim.

Houthi-Saudi conflict complicates diplomacy hopes

The U.S. State Department issued a security alert over the weekend, warning of potential unforeseen escalation in the Middle East and urging Americans to stay vigilant and prepare for possible flight cancellations and airspace closures.

The alerts followed claims by Iran-backed Houthi militants of missile and drone strikes on Riyadh on Saturday, which triggered the first air-raid warning in the Saudi capital since hostilities intensified in July.

Saudi officials reported that a ballistic missile was intercepted and destroyed, with no casualties or damage. The Houthis also tried to strike civilians and infrastructure across multiple areas of the kingdom, according to Saudi-led coalition spokesperson Major-General Turki al-Maliki, who posted on X on Saturday that those attempts were repelled by the country’s air defenses.

Despite widening hostilities, oil prices have retreated in recent days as traders anticipate a recovery in energy shipments from oil-rich Saudi Arabia.

Oil prices will stay elevated despite U.S. advances in moving oil through the Strait of Hormuz, a team of analysts at Eurasia Group noted in a Saturday report. Any increase in oil flows would be insufficient to close the overall market deficit, they said, projecting Brent prices to trade in a higher range of $90-110 per barrel for the remainder of this year.

“Iran’s leadership will stick with resistance, even as they quarrel internally,” the consultancy firm stated, noting that Tehran aims to use military proxies and tanker attacks to maintain a chokehold on shipping flows and pressure Washington into concessions.

Tehran has maintained it will not reopen the Strait of Hormuz until Washington honors its commitments under the June memorandum, which called for lifting the naval blockade of Iranian ports, easing sanctions, unfreezing Iranian assets, and ending U.S. military threats.

Iranian parliament speaker Mohammad Bagher Ghalibaf said Sunday that Iran must continue both fighting and negotiating to push back its adversaries, and only pursue diplomacy when it holds the advantage on the battlefield.

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Technologies

Oil prices drop below $100 per barrel as Trump shows willingness to engage with Iran

Oil prices fell below $100 per barrel as Trump expressed openness to diplomacy with Iran, amid ongoing regional tensions and attacks.

On Monday, crude oil prices saw a sharp decline, trading below $100 per barrel, after President Donald Trump reportedly opted against bombing Yemen for the time being and signaled openness to diplomacy with Iran. U.S. West Texas Intermediate futures decreased by 5.4% to $94.85 per barrel by 10:48 a.m. ET. Brent crude, the international benchmark, experienced a fall of 4.1% to $99.61 per barrel. Oil prices have declined for four consecutive sessions as the market retreats from the recent rally. Trump informed Fox News that he might be willing to meet with Iranian President Masoud Pezeshkian during this week’s UN General Assembly. Additionally, the U.S. president has chosen not to bomb Iran-allied Houthi militants at present, despite appeals from Saudi Arabia, according to Trump administration officials who spoke to The New York Times. In the meantime, crude exports from the Middle East have remained resilient following Saudi Arabia’s shutdown of its crucial East-West pipeline due to attacks, as stated by JPMorgan analysts in a note dated Sept. 18. Total oil flows averaged 17 million barrels per day over the past 10 days, which is 6 million bpd below the 2025 average, they reported. Exports through the Strait of Hormuz have steadily increased, with flows from the broader Middle East reaching approximately 80% of pre-war levels, according to Ryan McKay, director of commodity strategy at TD Securities. McKay stated in a Monday note that without a major escalation, Iran may have lost significant leverage in the Strait. However, the security situation in the region continues to be volatile and susceptible to sudden escalation. McKay noted that the oil market is struggling with multiple near-term drivers that are engaged in a tug of war for prices. The Houthis announced that they launched missiles at Riyadh, the Saudi capital, and targeted Aramco facilities at the Yanbu crude export terminal on the Red Sea over the weekend. At least two tankers have been attacked while transiting the Strait of Hormuz in the past day, based on incident reports from the United Kingdom Maritime Trade Operations Centre. Trump also told Fox that he is in a ‘deciding mode’ and that ‘very big things’ will happen soon concerning the Iran war. He described the options as ‘wiping Iran out, letting them rot economically, or making a deal,’ as reported by Fox. Meanwhile, Iran’s Revolutionary Guard warned that it will expand the ‘geography of the conflict’ if the U.S. launches renewed strikes against the Islamic Republic, according to the state media outlet Tasnim.

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