Data & Infrastructure Startups

Pubstack provides a programmatic advertising management platform for publishers to monitor, analyze, and optimize how their ad inventory is monetized. It offers real-time ad stack analytics, partner integration, and signal-based inventory packaging to increase revenue without requiring technical teams.

4 investors

Puller AI is a data access and preparation platform that enables business users to independently retrieve, transform, and utilize business-critical data without relying on data engineers. It serves consumer and retail companies by providing AI-powered data context and accessibility across multiple interfaces.

4 investors

Pulse is a document intelligence platform that uses OCR, layout analysis, and vision models to extract structured data from complex documents for enterprise and AI teams. The service is deployed on-premises or in private cloud environments and serves customers in financial services, healthcare, insurance, legal, and logistics.

4 investors

pyannote.ai provides speaker diarization and voice analysis tools that identify speakers, match voices to identities, detect overlapping speech, and provide confidence scoring. The platform serves Voice AI applications through cloud APIs, on-premise deployments, and on-device inference options.

4 investors

Pydantic provides runtime data validation and serialization using Python type hints, primarily for developers building APIs, data processing systems, and applications requiring type safety. The company develops open-source and commercial tools centered on type validation and observability.

4 investors

PYOR provides blockchain data analytics for crypto protocols, DAOs, and institutional investors, offering custom dashboards, risk and governance insights, and developer tools. It builds data solutions covering ecosystems such as Avalanche, Arbitrum, Compound Finance, ICP, and Livepeer to support data-driven decisions.

4 investors

Quadrata provides a portable digital identity passport for Web3, issued as a soulbound token that lets users access decentralized applications while verifying compliance attributes such as KYC, AML screening, business verification, and accredited investor status. It serves Web3 application developers who need identity and compliance checks integrated into their products.

4 investors

QueryPie provides database access management with real-time auditing and automated data masking capabilities for enterprises managing complex database permissions and security compliance.

4 investors

NetBase Quid offers an AI-powered consumer and market intelligence platform that analyzes large volumes of unstructured external data—social media, news, reviews, patents, and broadcast—to surface trends, brand sentiment, and competitive insights. It serves enterprise insights and strategy teams, including Fortune 500 companies across industries such as retail, media, healthcare, and travel.

4 investors

Quiver Quantitative scrapes and aggregates alternative stock market data from across the internet into a free web dashboard. It targets retail investors, giving non-professional traders access to alternative data typically reserved for institutional money managers.

4 investors

Quix offers a natural language interface that lets users query their data in plain language and receive answers. It tags telemetry with configuration and metadata so its QuixAI system can retrieve relevant information or delegate tasks to an agent.

4 investors

Qwilt operates an "Open Edge" edge cloud built with service provider partners, offering over 2,000 embedded nodes accessible through a single programmatic API for low-latency, hyper-local delivery. It serves content and application publishers and service providers for use cases such as AI inference, media streaming, and interactive real-time applications.

4 investors

RackN is a technology company presenting its core values and workplace culture on this page. The page describes principles such as long-term systems thinking, ownership, and collaboration but does not detail the company's specific products or services.

4 investors

Raiinmaker develops AI video models and datasets for creating customized AI systems. The company serves developers and organizations building AI applications.

4 investors

RankScience was a company founded by Ryan, who served as its CEO; it operated in the search engine optimization (SEO) space. The available page is a personal bio rather than the company's own website, so details about its product are limited.

4 investors

Readyset is a database scaling platform that sits in front of existing MySQL and PostgreSQL databases to accelerate read performance with sub-millisecond latencies. The platform automatically keeps cached query results synchronized with database writes, enabling improved performance and reduced infrastructure costs without requiring application code changes.

4 investors

Realm (formerly tight.db) is a mobile database for app developers, offered as a replacement for SQLite and Core Data to reduce development time and code. It is a Y Combinator company based in San Francisco.

4 investors

Reask develops climate risk models for insurers and reinsurers to forecast, price, and manage extreme weather exposure. The company applies peer-reviewed climate science to help the insurance industry respond to weather-related hazards with greater accuracy.

4 investors

Recce is a data quality and change management platform for data teams that provides visibility into data changes before merging pull requests, starting with dbt integration. It enables teams to review and validate data changes with confidence in AI-driven data systems.

4 investors

Redbelly Network is a blockchain platform that enables the tokenization and trading of compliant on-chain structured products for real-world assets. The platform serves asset issuers and operates as a regulated network focused on bridging digital and physical economies.

4 investors

Redpine provides AI developers and autonomous agents with access to licensed, high-quality multimodal data sourced from non-public content owners, who are compensated for opt-in AI use. It operates as a data platform serving AI companies and data partners across Europe, the Americas, and Asia.

4 investors

Reka builds AI models and infrastructure for physical-world applications, including a multimodal inference engine and API, video-processing infrastructure for tagging, searching, and reasoning over large video datasets, and a training-data platform (Claru) providing egocentric video, robotics trajectories, and world-model footage. Its products target enterprise users needing scalable, reliable multimodal AI.

4 investors

RelationalAI builds a Snowflake-native platform that combines large language models with semantic models, relational knowledge graphs, and rule-based reasoning to enable organizations to create AI-powered decision engines for business operations. The system fine-tunes LLMs securely within data clouds and applies business logic across applications without requiring data movement or retraining.

4 investors

Relativity6 provides data aggregation, enrichment, and verification services for underwriters to support risk pricing and assessment. The company serves the insurance and risk underwriting industry with data infrastructure and analytics.

4 investors