Companies

Postman is a San Francisco-based company offering a collaborative API development platform for designing, testing, and documenting APIs.

San Francisco-based provider of LLM fine-tuning and serving infrastructure using LoRA adapters, founded in 2021. Acquired by Rubrik in June 2025.

Prefect is a Washington, DC-based workflow orchestration platform with an open-source core, used to build, schedule, and monitor data pipelines and AI workflows.

Prognos Health is a healthcare AI company based in New York that analyzes clinical laboratory and diagnostic data to help predict disease progression and inform treatment decisions.

Promptfoo is an open-source platform for testing, evaluating, and red-teaming large language models and AI applications, used to identify vulnerabilities before production deployment.

Pulley is a San Francisco-based cap table and equity management platform for startups, offering tools for cap table tracking, 409A valuations, fundraising modeling, and compliance.

Pydantic is a London-based data validation and AI agent framework company behind the widely-used Pydantic Python library and Logfire observability.

Img2Go is a free web-based tool for converting and editing images, offering format conversion, resizing, and photo editing features.

Qdrant is an open-source vector database and similarity search engine written in Rust, headquartered in Berlin. It provides a service for storing, searching, and managing high-dimensional vectors with a REST and gRPC API.

Qlik is a King of Prussia, Pennsylvania-based data integration and analytics company offering Qlik Sense, Talend, and data fabric tools.

Qodo is a Tel Aviv-based company that builds AI agents for code review, testing, and quality assurance across the software development lifecycle.

Piper is an AI SDR agent built by Qualified, a San Francisco-based pipeline generation platform that automates inbound buyer engagement via website chat, email, and meeting scheduling.

Qualtrics is a cloud-based experience management software company headquartered in Provo, Utah, offering tools for collecting and analyzing customer, employee, product, and brand feedback.

Quantum Workplace is an Omaha, Nebraska HR software company founded in 2002 that offers employee engagement, performance management, and recognition software.

Quickbase is a Boston-based no-code application development platform used by enterprises to build operational apps across manufacturing, construction, and services.

QuillBot is a Chicago-based AI writing company offering paraphrasing, grammar checking, and summarizing tools. It operates as a unit of Learneo, Inc.

Quinyx is a Stockholm-based provider of cloud-based workforce management software for scheduling, time tracking, and employee communication.

Quizlet is a San Francisco-based education technology company offering a freemium platform with flashcards, practice tests, and study games used by students and teachers.

Quora is a Mountain View-based Q&A platform and home of Poe, its AI chatbot aggregator that provides access to dozens of leading LLMs in a single interface.

Qure.ai is a Mumbai-based company that develops AI software for interpreting radiology scans, including chest X-rays and head CT scans.

Qventus develops AI-powered software for hospitals and health systems, based in Mountain View, California, to optimize operations across surgical, inpatient, and emergency care.

Rad AI develops generative AI software for radiology reporting, based in San Francisco.

Ramp is a New York-based financial operations platform offering corporate cards, expense management, bill pay, and accounting automation.

Create AI agents you can trust with Rasa’s powerful platform, designed to scale, customize, and support real business needs across channels.

Raven Tools is a marketing reporting platform that consolidates SEO, social, and PPC data into client-ready reports.

Read AI is a Seattle-based meeting intelligence platform that provides automated transcription, summaries, and engagement analytics for video meetings across Zoom, Teams, and Google Meet.

Rebuy Engine is a Shopify-focused personalization platform based in Scottsdale, AZ, offering product recommendations, upsells, cross-sells, and post-purchase flows for e-commerce merchants.

Threat intelligence company that fuses open-source, dark web, and technical data into real-time security intelligence. Based in Somerville, Massachusetts.

Recraft is a London-based generative AI company offering a text-to-image and vector graphics design platform.

Recursion is a Salt Lake City-based biotech company using AI and automation to industrialize drug discovery through its proprietary Recursion OS platform.

Reducto is a San Francisco-based company that builds document ingestion and parsing infrastructure for AI applications.

Reflect is a networked note-taking app with end-to-end encryption, backlinking, and AI-assisted writing, built for personal knowledge management.

Relativity is a global legal data intelligence company. Its AI-powered platform, RelativityOne, transforms complex data into insights and actions to elevate the practice of law.

Relevance AI is a Sydney-based platform for building AI agents that automate sales, marketing, and customer success workflows across the GTM motion.

Relyze is a UK-based software reverse engineering tool providing interactive disassembly, decompilation, and diffing for x86, x64, ARM32, and ARM64 binaries.

Render is a San Francisco-based cloud platform for deploying and scaling web applications, APIs, databases, and background workers, positioned as an alternative to Heroku and AWS.

Replicate is a San Francisco-based company that offers a cloud platform for running and hosting open-source machine learning models via API.

Repricer.com is an automated repricing platform for Amazon, eBay, and Walmart sellers, operated by xSellco Limited and headquartered in Dublin, Ireland.

Resemble AI is a Toronto-based voice AI company offering custom voice cloning, synthesis, and deepfake detection tools.

Resolve AI is a San Francisco-based startup building an AI system that monitors alerts, diagnoses root causes, and resolves production incidents for engineering teams.