Top startup launches for May 2026

Grok Build is now available in Beta for all SuperGrok and X Premium+ users. Use Plan Mode, create images and videos with Imagine, and build automations or orchestrators with the CLI. Visit https://t.co/bpTHpjivWD to get started. https://t.co/OZ0kjtkpUf

An early beta of Grok Build, an agentic CLI for coding, building apps, and automating workflows is now available for SuperGrok Heavy subscribers. Through this early beta, we will improve the model and product based on your feedback. Try it at https://t.co/bpTHpjivWD https://t.co/Rlg4qMLkrv

Series E - raising $950 million from new and existing investors, led by @Tiger_Global and @GVteam, at a valuation of over $15 billion. Sierra now has more than $1 billion to invest in becoming the global standard for companies transforming their customer experiences with AI.

Introducing Composer 2.5, our most powerful model yet. It's more intelligent, better at sustained work on long-running tasks, and more reliable at following complex instructions. For the next week, we’re doubling the included usage of the model. https://t.co/N87ojcXlOC

We’re giving away $10,000,000 to founders building agent-first businesses. Autonomous, proactive agents will run tomorrow's companies. We're backing 500 founders building them. The Founding 500. https://t.co/u8mxRWEXiT https://t.co/chZDnNOnlM

Introducing SubQ - a major breakthrough in LLM intelligence. It is the first model built on a fully sub-quadratic sparse-attention architecture (SSA), And the first frontier model with a 12 million token context window which is: - 52x faster than FlashAttention at 1MM tokens - https://t.co/eZL0VOqBB4

Image Generation Quality Mode is now available on the xAI API. This model has already powered the generation of over 300 million images on Grok. It brings higher realism, stronger text rendering, and better creative control for business professionals. https://t.co/se5D7T5RJW

We raised $1M dollars to reinvent how people read. Introducing Mark II - a $159 AI bookmark. Thread below https://t.co/eL0XsyRlgC

Today we’re launching the OpenAI Deployment Company to help businesses build and deploy AI. It's majority-owned and controlled by OpenAI. It brings together 19 leading investment firms, consultancies, and system integrators to help organizations deploy frontier AI to production

We live in a golden age of biology. So why are people still dying from disease? Because discovery and development move slower than they should. Today, we’re partnering with Incyte to change that. Kosmos is now the first agent that can compress months of drug development into https://t.co/j0WGDtBNdO

Between rooms. On rounds. Walking the corridor outside an OR. Charting one-handed during a phone call. This is where clinical questions happen. Today we're launching Voice Mode. OpenEvidence is the first multimodal medical AI: physicians can type, speak, or listen, on the same https://t.co/OPx9sB8C4u

Polsia just raised $30M at a $250M valuation. Approaching $10M annual run rate. One Founder + AI. Zero employees. Polsia runs companies autonomously. It also ran its own fundraising. I just showed up for signatures. https://t.co/6ryypKG0GY

Introducing Daybreak: frontier AI for cyber defenders. Daybreak brings together the most capable OpenAI models, Codex, and our security partners to accelerate cyber defense and continuously secure software. A step toward a future where security teams can move at the speed https://t.co/AGfXhmJb5E

AI is making kids dumber. It should be making them geniuses. Introducing Koji, the first AI tutor that gets kids to actually think. 👇 https://t.co/tmCdVoEZYF

Announcing Cofounder 2: Run an entire company with agents. It's the infrastructure for the one person billion dollar company - orchestrating agents across engineering, sales, marketing, ops, and design. (and yes that's my real grandma in the video) https://t.co/z1e7yHyvEg

Introducing Co-Invest. (@coinvestai) The first way to trade directly through ChatGPT and Claude. https://t.co/rWnn4JWUyn

Introducing GPT-Realtime-2 in the API: our most intelligent voice model yet, bringing GPT-5-class reasoning to voice agents. Voice agents are now real-time collaborators that can listen, reason, and solve complex problems as conversations unfold. Now available in the API https://t.co/2DY1LU2vO8

We’re launching @JudgmentLabs today and announcing $32M in funding. As AI agents take on more of the work that creates economic value, they generate massive amounts of production data: the clearest record of how they behave with users, software, and the real world. Judgment https://t.co/SGk8IPpTIZ

Last month we launched Project Glasswing, our collaborative AI cybersecurity initiative. Since then, we and our partners have found more than ten thousand high- or critical-severity vulnerabilities in essential software.

Introducing OpenAI Guaranteed Capacity: a new offering that enables customers to guarantee long-term access to OpenAI compute. We’ve made long-term investments in infrastructure, partnerships, and capacity planning to help customers scale reliably. Now, Guaranteed Capacity

Kuli (@kuli_ai) is the AI coworker that gives marketers their time back and makes them 10x more efficient. It watches all videos on socials to find the next trend and gets work done. Already live at Fortune 100 brands, it plans and runs their campaigns with creators. Congrats https://t.co/ge62ESE2KN

Today, we’re announcing Viktor’s $75M Series A, led by @Accel . @viktor__com was supposed to be a small experiment. It became the AI coworker 10x'ing real businesses. $15M in annualized revenue run rate. In 10 weeks. – Small companies saving millions of dollars – Sourcing https://t.co/adbqqwRZju

Introducing Libra AI, the SOTA super agent that amplifies your work, enabling you to bring your best everyday. Your work life will never be the same starting today. > Libra understands all your data and context like a human teammate > Takes actions on your behalf > Replaces the https://t.co/UXuKQQyfDc

It’s never been easier to design your dream house. Draw a shape. Define your rooms. Set your constraints. @DraftedAI generates complete floor plans, elevations, and 3D home designs in seconds. Over the last month, 120,000 people generated 325,000+ home designs with https://t.co/15UwGKE5G3

What if your Claude could be Monica? Or Darius? Or whoever you want them to be? Today, we’re introducing the Pika MCP. Which means you can give your Claude a face, name, and personality—plus the ability to create rich, multimodal content. Byeeee generic AI. Pikafy your Claude https://t.co/5xfvqR47pU

Today, RADAR announced a $170 million Series B, bringing our valuation to more than $1 billion. We believe Physical AI can transform the 80% of global commerce that still happens in stores.  Retailers lose an estimated $1 trillion each year because their stores lack real-time https://t.co/g1DXUa3JcY

We raised $5.4M to make paid ads run themselves. Introducing Playad, the world's first AI marketing team. First up: paid ads, run by AI. https://t.co/3NOGUBTrcM

Nobody believes in you, so make them. Announcing our $7M seed round led by @Slow. https://t.co/0rXH4iRfN8

Introducing Voyager Gateway 1. Warfighters at the edge need access to mission compute capabilities that are typically constrained to the base. The size, weight and power burden make server racks unrealistic options. Voyager G1 is the rugged, waterproof device that unlocks https://t.co/2bB5svR5jY

Attention, all you geniuses with products, but no marketing skills. Today we’re launching the Founder Starter Kit—4 skills that will help you look and sound like a legit company, including: > Build-a-Brand > App Screens > Product Sizzle > Founder Video Available for Claude via https://t.co/p9uqgaIiFl