Series B Data infrastructure companies in San Francisco

Railway’s mission is to build the cloud computing stack that unburdens you, so you can focus more on what matters to you.

• Series B
• 11.2k employees
• Founded 2020

As the global home for all developers, GitHub is the complete AI-powered developer platform to build, scale, and deliver secure software. Over 100 million people, including developers from 90 of the Fortune 100 companies, use GitHub to build amazing things together across 330+ million repositories. With all the collaborative features of GitHub, it has never been easier for individuals and teams to write faster, better code.

• Series B
• 6.7k employees
• Founded 2008

What Does Sama DoSama gets your AI project to production—and helps you stay there.Sama is chosen by high-performing GenAI and CV teams across the full AIdevelopment lifecycle, combining expert services with reliable execution thatscales—delivering results, dependable datasets, and continuity even as things change.Our services cover the full AI lifecycle:● Data Strategy & Consulting – Aligning data needs to model goals, definingquality standards, and setting the foundation for faster, more confidentdevelopment● Annotation & Labeling – Using full-time, domain-trained teams with built-in QA to deliver precise, production-ready training data.○ Annotation Workflows: Validation, Classification, Tagging, Enrichment○ GenAI Workflows: Prompt Engineering, RAG embedding, Retrieval-AugmentedGeneration (RAG), Content Moderation & Filtering...● Model Evaluation – Scoring, ranking, and validating model outputs throughstructured, rubric-based evaluation and human-in-the-loop reviewWe don’t just deliver data—we embed in your workflows. Our dedicated teams,integrated QA, and platform support accelerate time-to-quality and give you the control and flexibility needed to iterate with speed and confidence.

• Series B
• 4.3k employees
• Founded 2008

Constructor is the only search and discovery platform designed exclusively for commerce where conversions matter. Our platform delivers unmatched KPI optimization and fast ROI for enterprise ecommerce brands, retailers, distributors, marketplaces, and more — while giving customers a personalized, enjoyable shopping experience. Unlike other platforms, Constructor is the only search and product discovery solution that was built from the ground up with clickstream data and advanced AI, not merely bolted onto a legacy keyword engine. Consistently outperforming competitors in A/B tests, Constructor’s solutions use generative AI and collaborative personalization to deliver compelling user experiences across all aspects of product discovery. From search and browse, to AI Shopping Agents and Product Insights Agents, recommendations, collections, offsite discovery, attribute enrichment, and much more, Constructor covers the entire discovery journey.Optimizing specifically for ecommerce metrics like revenue, conversion rate and profit, Constructor generates consistent $10M+ revenue lifts for our customers, which include some of the world’s most recognized brands, like Sephora, Under Armour, Petco, and many more.Constructor is the only search and discovery vendor named a Leader by Forrester, Gartner and IDC. Want to hear from our customers? See what they have to say about us at G2 or Gartner Peer Insights.Learn more at constructor.com.

• Series B
• 1.4k employees
• Founded 2015

Engineering the Experience that matter.A full-stack digital partner for what’s next, Robosoft builds people‐centric digital solutions powered by the global scale of TechnoPro and Blackstone.With nearly three decades of experience, we combine human understanding with engineering excellence to help organizations grow, adapt, and thrive.Robosoft helps enterprises design and engineer intelligent digital systems where experience, software, and AI converge. From mobile, web, application, and software-defined platforms, we build human-centered technology that is intuitive to use, resilient by design, and ready to evolve.At the heart of everything we do is a simple belief: Technology should serve people and the outcomes they care about. We bring together human insight, product thinking, and deep engineering to create meaningful digital experiences and intelligent systems. Our work is modern, resilient, and built for impact approached with humility, care, and respect for the responsibility our clients place in us.

• Series B
• 1.1k employees
• Founded 1996