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Tech companies are racing to build massive AI data centers, with projects ranging from Microsoft’s 15 facilities in Mount Pleasant, Wisconsin, and OpenAI/Oracle/SoftBank’s five new Stargate sites to Anthropic’s planned $50 billion US buildout and even proposed space-based data centers from Elon Musk and Google. The boom is driving fights over power grids, electricity bills, water use, pollution, and local health, with examples including Utah’s approved 40,000-acre project, communities seeing electricity costs rise as much as 267 percent, and regulators in several states and countries investigating or moving to rein in data center growth.

Sierra raised $950 million at a $15 billion valuation to lead the week’s top 10 U.S. startup funding rounds, followed by Astranis at $455 million, Anagram Therapeutics at $250 million, Blitzy at $200 million, Corgi Insurance at $160 million, Panthalassa at $140 million, Reserv at $125 million, DeepInfra at $107 million, Tessera Labs at $60 million, and Astrocade at $56 million. The lineup shows enterprise AI and AI infrastructure still dominating megadeals, while space tech, biotech, insurance, renewable energy, and gaming also pulled in nine-figure-plus capital, with notable backers including Google Ventures, Tiger Global, Snowpoint Ventures, Franklin Templeton, Blackstone Life Sciences, Northzone, TCV, Peter Thiel, KKR, 500 Global, Andreessen Horowitz, Sequoia Capital, and Sea.

Court documents from the Musk v. Altman trial show Microsoft executives discussing early OpenAI investment and worrying the startup might “storm off to Amazon” and “shit-talk” Azure. The emails highlight how fragile the partnership once looked, even as Satya Nadella and Sam Altman were negotiating a much larger funding relationship after OpenAI’s Dota 2 bot breakthrough.

Sales, marketing and CRM startups have raised about $3.7 billion globally in 2026 so far, on pace to be roughly flat with the last three years and far below the more than $20 billion boom years of 2021-2022, while AI-focused companies now capture a majority of the funding. Recent standout deals include Sierra’s $950 million round at a $15 billion valuation, Hightouch’s $150 million Series D at $2.75 billion, Netomi’s $110 million round, Actively’s $45 million Series B, and Parloa’s $350 million Series D at a $3 billion valuation, showing that agentic customer-experience and marketing tools are where venture dollars are concentrating.

Pit, the new AI startup led by Voi co-founders, has raised a $16 million seed round led by a16z. The funding makes it the latest rising AI company out of Stockholm and signals continued investor appetite for Nordic startup founders.

Elon Musk and Sam Altman are in a jury trial over OpenAI’s direction, with Musk alleging the company abandoned its nonprofit mission for profit while OpenAI calls the suit a baseless attempt to disrupt a competitor; witnesses so far include Musk, Jared Birchall, Greg Brockman, Shivon Zilis, and Mira Murati’s videotaped deposition, with Satya Nadella set to testify on May 11 and Ilya Sutskever afterward. The case matters because Musk is seeking Altman and Brockman’s removal, a halt to OpenAI operating as a public benefit corporation, and up to $150 billion for OpenAI’s nonprofit if he wins, which could reshape control of ChatGPT and the competitive position of xAI versus Microsoft-backed OpenAI.

Fazeshift raised a $17 million Series A led by F-Prime Capital, with participation from Gradient Ventures, Y Combinator, Wayfinder Ventures, Pioneer Fund, Ritual Capital and angels, bringing total funding to $22 million since its 2023 founding. The startup says its AI agents automate more than 90% of accounts receivable work across existing systems, and its 12x revenue growth in a year plus customers including Sigma Computing, Snyk, Meter and Clipboard Health show investor demand for AI that tackles messy finance workflows.

American Express’s venture arm, Amex Ventures, is backing startups for an autonomous commerce stack as the 175-year-old company pushes toward a “global agentic concierge,” with recent bets including Palm, Bluefish’s $43 million Series B, and Candex. Kevin Tsang said the bar has shifted from decision-support tools to agentic commerce systems that can handle end-to-end workflows with user authorization, emphasizing trust, identity, and personalization over any single AI model layer.

AI is lowering the bar to build a startup, but investors are responding by prioritizing founder-market fit, domain expertise, customer discovery, and the ability to create demand over pure technical execution. Seed teams are getting leaner too, with Carta data showing an average of just over 6 employees last year versus more than 10 in 2021, while AI-generated “startup slop” makes dealflow noisier and pushes investors toward harder-to-fake sectors like deep tech, therapeutics, hardware, and advanced manufacturing.

Crunchbase said 28 companies became new unicorns in April, with AI-related startups making up 26 of them and frontier labs and robotics companies leading for the second straight month. New entrants included London-based Ineffable Intelligence at a $5.1 billion valuation after a $1.1 billion seed round, Recursive Superintelligence at $4.5 billion after a $500 million Series A, and six humanoid robotics companies, reflecting continued investor appetite for foundation models and simulated-data robotics.

Blitzy, an autonomous software development startup founded in 2023 by CEO Brian Elliott and CTO Sid Pardeshi, raised $200 million in a round led by Northzone at a $1.4 billion valuation, bringing its total funding to more than $204.4 million. The company says its platform can autonomously complete months of software development and has been adopted by dozens of Global 2000 enterprises, underscoring continued investor appetite for AI coding tools after big rounds for Anysphere, Replit, and Lovable.

The piece argues that M&A deals often fail before they start because founders and investors anchor on prior funding valuations and rare AI headline transactions, citing a company that raised $10 million at a $40 million valuation and examples like Microsoft’s roughly $650 million Inflection AI licensing-and-talent deal. Buyers instead price on demonstrated revenue, growth, retention, and strategic fit, so narrative-driven expectations without proof create an early valuation gap that kills negotiations.

Global venture funding hit $56 billion in April, the third-highest monthly total in a year, with Anthropic raising $15 billion and Jeff Bezos’s Project Prometheus raising $10 billion to drive the surge. AI accounted for $37 billion, or 66% of all venture investment, meaning two companies captured 45% of April’s capital and nearly 60% of year-to-date funding has gone to just five companies.

True Anomaly led the week’s U.S. startup funding with a $600 million Series D led by Eclipse and Riot Ventures, while Rogo ($160 million), Hightouch ($150 million), Avoca ($125 million), Netomi ($110 million), and tied $100 million rounds for Parallel and Scout AI rounded out the top deals. The list underscores how defense tech is drawing outsized capital alongside AI startups across fintech, marketing, customer service, and developer tools, with True Anomaly’s total funding reaching $1.1 billion.