Discover the next generation of startups.

DAIVIN!

YCombinator

Tankless Dive Gear - Breath Autonomy at Sea, Land & Space

DAIVIN! builds tankless dive gear that unlocks breath autonomy in extreme environments. Starting from underwater environment our mission is to remove the need for dangerous, heavy and bulky oxygen tanks in space, air and on land and replace them with water!

Daqstra

YCombinator

AI-native orchestration for physical R&D

Daqstra is the AI-native orchestration layer for physical R&D. It saves engineers in Aerospace, Energy and Robotics hundreds of man hours managing test infrastructure by connecting fragmented test hardware, bringing live and historical test data into one place, and by giving engineers an API to orchestrate their entire test setup. We enable teams to spend less time rebuilding test infrastructure and more time improving the hardware they test.

dari.dev

YCombinator

The Production Layer for AI Agents

We let developers deploy AI agents as API endpoints with built-in tools, sandboxes, and durable execution. Agents maintain state, run long-lived workflows, and handle retries automatically.

Datost

YCombinator

The proactive AI data analyst

Datost watches your docs, Slack, databases, data lakes, and codebase, surfacing issues, answering questions, and flagging anomalies before anyone asks. Query, debug, and analyze right where your team works

Dayjob

YCombinator

AI Scheduling for Short Haul Trucks

Dayjob does AI Scheduling for Short Haul Trucks. Our scheduling agent plugs into existing ERPs and continuously re-optimises routes in real time - handling new jobs, driver changes, and exceptions automatically. Customers in waste management see 8%+ efficiency gains from day one.

Deel

YCombinator

The all-in-one HR and payroll platform for global teams

Deel is the all-in-one payroll and HR platform for global teams. Built for the way the world works today, Deel combines HRIS, payroll, compliance, benefits, performance, and equipment management into one seamless platform. With AI-powered tools and a fully owned payroll infrastructure, Deel supports every worker type in 120+ countries—helping businesses scale smarter, faster, and more compliantly. Discover how Deel makes global work simple at deel.com.

Deepgram

YCombinator

Building foundational AI for speech transcription and understanding.

Deepgram is a foundational AI company on a mission to understand human language. We give any developer access to the most advanced speech AI transcription and understanding with just an API call. Our models deliver the fastest, most accurate transcription alongside contextual features like summarization, sentiment analysis, and topic detection. Beyond that, developers can: 🔊 Process live-streaming or pre-recorded audio 🌎 Transcribe in dozens of languages ⚙️ Train custom models for unique use cases 🔑 Access deep NLU with a unified API 💻 Build in any programming language with our SDKs ✅ Deploy on-prem or on DG’s managed cloud 📈 Get scalable GPU infra for training and inference Deepgram is a proud NVIDIA partner and Y Combinator company, and we recently completed a $72M Series B to define the future of AI Speech Understanding, making us the most-funded speech AI company at its stage.

Deeptrace

YCombinator

AI agents for on-call

At Deeptrace, we’re building AI agents that investigate and resolve production alerts end-to-end. Deeptrace cuts through the noise, pinpoints root causes instantly, and gives engineering teams back what they need most: the freedom to build instead of firefighting. In production, we're already seeing a reduction in time spent triaging, investigating, and resolving alerts with some of the fastest growing companies in the world.

Definite

YCombinator

The most accurate financial agents for reporting

Definite builds AI agents that generate the reports banks and financial institutions file with their regulators. Before any number lands in a filing, our verification engine checks it independently. Every line gets recomputed from ledger records and checked against a versioned rulebook, and wrong outputs go back to the agent with the reason, like compiler errors. They don't ship. We met our first year studying computer science at the University of Waterloo, and interned at Meta, Optiver, and BitGo, places where one unverified number in a filing has real consequences. At BitGo, attestations proving customer assets matched the ledger were assembled by hand every period. At Optiver, daily regulatory numbers were rebuilt manually because nothing downstream took them on faith. Today a controller pulls data from the core system into Excel and maps it to the report line by line. By the regulators' own estimate, one quarterly filing takes weeks. The software banks buy for this validates formatting, not truth: a loan mapped to the wrong schedule line passes every check it runs, and an executive personally signs the result. This is hard because verification has to be independent of the model doing the work. Recomputing every number from source records is the only check a regulator or auditor will accept, and it's why DeepSeek v3 with our engine beats GPT-5 on public reporting benchmarks. Every regulated institution files these reports, forever. Whoever proves the numbers owns the layer the filings, the audits, and eventually the books themselves depend on. We build it, and the agents that run on it.