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Y Combinator’s Summer ‘26 Demo Day is just over a week away. We’re back with a full overview of the latest startups in the batch, what they’re building, the categories they’re focused on and the trends behind them, as well as the partners who coached them.
So what have we learned about this batch so far?
52% of the batch are B2B startups, with founders building across productivity, the agent supply chain, and infrastructure tools for other companies rather than end users.
Consumer stays a minority category at around 5% of the batch, consistent with the last several cohorts.
The agent story is maturing: YC’s previous batch was defined by agent applications, while this batch of companies are building the infrastructure underneath them, routing, context management, evaluation, and automation tooling that makes an agent usable in production.
Batch size: 235 companies are in this cohort, a 20% increase from the previous batch.
Let’s explore the latest trends shaping this batch in full.
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The history of Y Combinator
In just over a week, 230+ startups from the latest Y Combinator batch will present to investors at the Summer ‘26 Demo Day, and this may be the strongest batch yet. After meeting several founders in recent weeks, one trend is very clear: the founders are doubling down on AI, focusing on B2B as well as categories covering industrials such as robotics and defense.
Ask any founder or investor, and they have undoubtedly heard of Y Combinator, one of the world’s most renowned startup accelerators, with a mighty track record. Founders who raise from them are 45% more likely to raise a Series A and the accelerator turned 21 years old earlier this year. Throughout that time, they have achieved some incredible stats, including:
$1.3T+ in combined market value has been created.
6.5% of YC startups become unicorns.
A quarter of all YC-backed unicorns achieve a valuation of over $10 billion.
50% of YC startups are still operating after 10 years.
So with the latest batch wrapping up, many of these startups are poised to rise, let’s meet them!
Meet the Summer ‘26 Batch
With a lot of eyes on YC companies, we wanted to showcase them through a wider infographic to help you navigate the areas that most interest you. Meet the 235 startups from YC’s latest batch who are building across the following categories:
B2B
General B2B Software, Infrastructure, Engineering & Product, Security, Supply Chain & Logistics, Analytics, Operations, Finance & Accounting, Productivity, Sales, Recruiting & Talent, Marketing, Legal, and Retail.
FinTech
General FinTech, Insurance, Asset Management, Banking & Exchange, and Consumer Finance.
Consumer
General Consumer, Gaming, Content, Social, and Job & Career Services.
Healthcare
General Healthcare, Drug Discovery, Consumer Health & Wellness, and Healthcare Services.
Industrials
General Industrials, Manufacturing and Robotics, Defense, Aviation and Space, as well as Energy and Climate.
Disclaimer: Most startups are listed, but companies still in stealth without a public logo may have been excluded.
*This market map was fully designed by a human.
Access the companies in full
Discover the batch in full below!
Trends from this batch
We’re tracking the latest trends across batches, comparing Spring 2026 (the previous batch) with the current Summer 2026 batch. Here’s a quick look at which categories the startups are building in:
Batch size: 196 → ~235 companies (+20%)
B2B: 59.2% → 52.3% (−6.9%)
Industrials: 12.8% → 23.0% (+10.2%, the biggest shift)
Fintech: 10.2% → 6.8% (−3.4%)
Healthcare: 8.7% → 8.5% (essentially flat)
Consumer: 6.6% → 5.5% (−1.1%)
Real Estate & Construction: 2.0% → 2.6% (+0.6%)
Defense: 6 → 8 companies (+33%)
US-headquartered: ~94% → ~90% (slightly more international)
Biggest trends shaping this batch
1. Physical AI is the headline story
Industrials is now 23% of the batch, the second-largest category after B2B, up from just 12.8% last batch. This isn’t just robotics-as-a-vertical; it’s split across humanoid/home robots (Nori, OS3, NORI), warehouse and data-center robotics (Manifold, Proprio Robotics), and robot evaluation/training infrastructure (Robocurve, Instance, Markov). The through-line: AI agents are moving off screens and into physical labor.
2. Defense is a real, sizeable opportunity
At least 8 companies are building precision munitions, drone swarms, counter-UAS systems, and tactical situational-awareness hardware (ISENGARD, Earendil Robotics, Greypoint Industries, GUILD, Hop Aero). This is no longer a small bet these companies and founders are taking, it’s a consistent, well-represented vertical which many founders and investors are paying attention to.
3. “Agent-native” back-office replacement is everywhere
Dozens of companies pitch themselves as replacing entire functions with AI, not just augmenting them: agent-native accounting firms (Last Accounting Company, Rational, Billow AI), agent-native law firms (Osmaura, Erinys), agent-native ERP implementation (Trope), agent-native insurance carriers. The framing has shifted from “AI copilot for X” to “AI-run X.”
4. Infrastructure for AI agents themselves is maturing into a stack
Identity (Inkbox, OneCLI), payments (Agentcard), memory (Glen, Egoist Machines), evals (Archal, Instance), runtime debugging (Hyperprobe), and credential gateways are all distinct, well-populated niches, suggesting the “agent economy” has enough agents in production now to need real plumbing, not just experiments.
5. Compute economics as its own category
GPU marketplaces and liquidity products (Stoa), inference routing/cost-cutting (Conifer, Understudy Labs, OpenRelay), and specialized AI chips (Baud, Standard Machines, Lamb Labs), all responding directly to the cost of running frontier-scale AI at production volume.
6. Vertical-specific “AI-native” replacement of professional services
Beyond accounting and law: AI-native government affairs firms (Locke), AI-native McKinsey-style consultancies, AI-native radiology and clinical operations (Insurf). The pattern spans regulated, white-collar industries specifically, the ones with the most repetitive document/compliance work.
7. Solo founders and very small teams building hardware
Several one or two-person teams (Osseus, hardware intelligence, screenpipe) are shipping hardware-adjacent or infra-heavy products that historically required larger teams, suggesting that AI tooling is dramatically expanding what tiny teams can build.
Graphs - Categories YC’s Summer ’26 Batch Is Building In: B2B
Industrials
Healthcare
Fintech
Consumer
Discover previous batches
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