startup ideas · 2026
Trending startup ideas in 2026
752 companies from 2026 cohorts are in the MarkosWeb corpus so far - four Y Combinator batches plus Techstars and 500 Global intakes. Trend here means measured movement: which clusters gained share batch over batch, which words appeared in founders' one-liners for the first time, and how the product form shifted. The headline: 37% of 2026 companies ship an autonomous agent, against 11% in 2022, while copilots fell to 3%.
752
companies from 2026 cohorts
70%
AI-native in 2026
37%
build an agent
3%
build a copilot
Rising in 2026
Share of classified YC companies, last two batches against the two before. Positive means the cluster is taking a bigger slice of each new batch.
- Robotics and physical world+1.8 pp · 13.2% of S26
- Fintech+1.7 pp · 4.3% of S26
- Healthcare and bio+1.7 pp · 5.5% of S26
- AI infra and compute+1.6 pp · 7.2% of S26
- Defense and space+1.5 pp · 3.8% of S26
- Horizontal AI assistants+0.9 pp · 3.0% of S26
Cooling
Losing share is not the same as shrinking: vertical AI agents still lead every batch. It means the marginal founder is choosing something else.
- Vertical AI agents-3.1 pp · 26.0% of S26
- Consumer-2.0 pp · 3.4% of S26
- Developer tools-1.6 pp · 3.4% of S26
- Data for AI-1.0 pp · 3.8% of S26
Agents replaced copilots
Product form by cohort year, across all programs: AI at the core of the product, and whether it does the job itself (agent), assists a person (copilot) or is something others build on (infra).
| Cohort year | Companies | AI-native | Agent | Copilot | Infra |
|---|---|---|---|---|---|
| 2022 | 1,117 | 27% | 11% | 3% | 11% |
| 2023 | 1,129 | 41% | 18% | 6% | 10% |
| 2024 | 1,397 | 49% | 20% | 7% | 12% |
| 2025 | 1,002 | 65% | 31% | 6% | 17% |
| 2026 | 727 | 70% | 37% | 3% | 23% |
Words being born
Two-word phrases from company one-liners that barely existed before the current wave and are now used by several companies. Vocabulary moves a year before cluster shares do.
- data centers10 now · 4 before · first 2024
- prediction markets5 now · 1 before · first 2024
- knowledge work4 now · 0 before · first 2025
- agentic operating4 now · 0 before · first 2025
- ainative insurance4 now · 0 before · first 2025
- learning layer3 now · 0 before · first 2026
- voice models3 now · 0 before · first 2025
- ainative erp3 now · 0 before · first 2025
- run themselves3 now · 0 before · first 2025
- trade compliance3 now · 0 before · first 2025
- accounting firm3 now · 0 before · first 2025
- continual learning3 now · 1 before · first 2024
- claude code3 now · 1 before · first 2022
- ainative law3 now · 1 before · first 2022
Method and the longer list: Trends.
2026 cohorts in the corpus
| Program | Batch | Companies |
|---|---|---|
| Y Combinator | S26 | 235 |
| Y Combinator | W26 | 199 |
| Y Combinator | X26 | 196 |
| Techstars | TS 2026 | 65 |
| 500 Global | - | 20 |
| Y Combinator | F26 | 17 |
| 500 Global | 500G Eurasia 10 | 7 |
| 500 Global | 500G MENA 11 | 7 |
| 500 Global | 500G Lucha - NONE | 6 |
The newest YC batch is still filling: Batch Live.
From a trend to an idea
- A rising cluster is a market with a tailwind and more competitors next batch. Check the crowded subniches on AI startup ideas before committing to the obvious one.
- A cooling cluster with a big graveyard is often the better entry: fewer new rivals, and the last wave's mistakes are documented on dead startup ideas.
- Demand side: Gaps compares YC's Requests for Startups with how many companies already build each theme.
More startup ideas by angle
- AI startup ideas →Where AI-native companies are actually being built
- Dead startup ideas worth reviving →Graveyards that founders are re-entering
- Stealth startups →How many accelerator startups are really in stealth
Validate any of them: Idea Check shows who already builds it; Idea Lab writes concepts from a cluster's data; Chat matches ideas to what you can build.