Top Series C companies in San Francisco

Companies that have closed a Series C - growth-stage with significant revenue. Filtered to companies headquartered in San Francisco.

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Ranked by current headcount across Series C companies headquartered in San Francisco. Refreshed daily.

1
Remote· San Francisco, California, United States
Global employment runs on Remote. Employing and paying people across borders is complex. Every country has different employment laws, tax codes, payroll rules, and compliance requirements. Getting it wrong has real legal and financial consequences.Remote is the intelligent infrastructure built to solve exactly this. One system of record for EOR, global payroll, PEO, contractor management, and compliant payments, worldwide. In-house experts in every country we operate in, infrastructure we own and run ourselves. Built to connect with any HRIS, tool, or AI agent your business already runs on.The infrastructure trusted by the world's leading HR platforms for global payroll and EOR. A regulated payments institution with owned entities operating across the world.This is not software. This is infrastructure... so the world can get to work.To learn more or book a demo, visit remote.com. To join our team, visit remote.com/careers.
- Series C
- 18.1k employees
- Founded 2019
2
Twitch· San Francisco, California, United States
Twitch is where thousands of communities come together for whatever, every day. Together for streamers. Together for games we love. Together for each other.
- Series C
- 14.9k employees
- Founded 2011
3
Mercor· San Francisco, California, United States
We find the best experts in every professional domain and put their knowledge to work training frontier models. Through APEX, we measure whether those models can actually perform economically valuable work. We're also bringing that expertise to enterprises: deploying custom AI agents, staffing teams with vetted domain experts, and helping organizations encode their own knowledge into AI systems.
- Series C
- 8.7k employees
- Founded 2023
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4
Clipboard· San Francisco, California, United States
Our Why:At Clipboard, our mission is to uplift as many communities as possible. We do this by connecting healthcare professionals with the workplaces that need amazing workers, helping people achieve financial stability for themselves and their families while providing essential care to people all across the U.S.Our How:Clipboard is an app-based marketplace where workplaces post calls for help and workers answer. Every year, we help hundreds of thousands of workers fill millions of shifts across the U.S. We’re the leader in Long-Term Care staffing and are rapidly expanding into Home Health, Hospitals, and more.Our Team:Founded in 2016, we are a remote-first team of over 1,000 people working to uplift communities across the country.Today, healthcare facilities and schools are understaffed, which can result in poor patient care, student outcomes, and employee burnout. Meanwhile, local professionals have time and want to pick up extra shifts. These two parties don’t know each other and aren’t sure if they can work together (licenses, qualifications, or even trust might get in the way). Clipboard exists to solve this problem.
- Series C
- 4k employees
- Founded 2016
5
Miro· San Francisco, California, United States
Miro is the collaborative workspace where agents and teams converge to think, decide, and build together. As AI accelerates work, the challenge for organizations isn't doing more; it's turning individual output into scaled impact. Serving more than 100 million users across 250,000 customers, Miro’s shared, secure canvas surfaces the context that empowers teams to solve harder problems, make better decisions, and move work forward faster. Founded in 2011, Miro currently employs 1,600 people in 13 hubs around the world.
- Series C
- 2.8k employees
- Founded 2011

6
Crescendo· San Francisco, California, United States
AI has created a real opportunity to transform customer experience. But for most organizations, deploying AI was the easy part.The hard part is operating it – across multiple channels, alongside human agents, through constant changes in products, policies, and customer expectations. Most CX operations were never built for this, and the result is AI that stalls, fragments, and underdelivers.Crescendo is built for what comes after deployment.We combine autonomous AI technology with embedded CX expertise to run your entire customer experience operation as one continuously improving system. AI and humans on the same knowledge. The same operating model. Accountable for the same outcomes.Customers typically go live in 3.5 weeks, see 95% CSAT, and cut operating costs by 31%.This is what AI-Native CX looks like.One System. Smarter CX.
- Series C
- 2.3k employees
- Founded 2024
7
OpenTable· San Francisco, California, United States
OpenTable, part of Booking Holdings, Inc. (NASDAQ: BKNG), has been proudly serving restaurants for over 25 years—resulting in a network of over 70,000 restaurants, bars, and wineries around the world. From “Where should we eat?” to “Your table is ready,” OpenTable is the bridge between restaurants and diners. For restaurants, OpenTable is an all-in-one solution that helps streamline FOH and BOH operations, puts them in front of new guests, and backs it all up with 24/7 customer support in 240 languages. Plus, OpenTable is integrated with hundreds of technology partners to help restaurants run seamlessly. All so restaurants can focus on what they do best: providing amazing hospitality and food. For diners, it’s the easiest way to discover new restaurants with personalized recommendations, data-backed lists, curated guides and more, and manage all your reservations through an intuitive app. After all, dining out is better when it runs smoothly on both sides of the table.
- Series C
- 2.3k employees
- Founded 1998
8
LiveRamp· San Francisco, California, United States
LiveRamp is the data collaboration platform for the world’s most innovative companies. A leader in consumer privacy, data ethics, and foundational identity, LiveRamp sets the new standard for building a connected customer view with unmatched clarity and context while protecting brand and consumer trust.LiveRamp provides the flexibility to collaborate wherever data lives to support various data collaboration use cases - within organizations, between brands, and across its global network. Hundreds of global innovators - from iconic consumer brands and tech giants to banks, retailers, and healthcare leaders - rely on LiveRamp to build enduring brand and business value by deepening customer engagement and loyalty, activating new partnerships, and maximizing the value of first-party data while staying on the forefront of evolving compliance and privacy requirements.LiveRamp is based in San Francisco, California, with offices worldwide. Learn more at LiveRamp.com.
- Series C
- 1.6k employees
- Founded 2011
9
Factory· San Francisco, California, United States
Factory is an AI research lab, bringing autonomy to software engineering with Droids.
- Series C
- 1.4k employees
- Founded 2023
10
Docker, Inc· San Francisco, California, United States
At Docker, we simplify the lives of developers who are making world-changing apps. Docker helps developers bring their ideas to reality by conquering the complexity of app development. We simplify and accelerate workflows with an integrated development pipeline and application components. Actively used by millions of developers around the world, Docker Desktop and Docker Hub provide unmatched simplicity, agility and choice.
- Series C
- 1.1k employees
- Founded 2013

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Find engineers at Series C companies in San Francisco

Series C companies in San Francisco are some of the fastest-moving employers in the market. The list above ranks the largest Series C-stage companies headquartered in San Francisco by current headcount, drawn from public LinkedIn and Crunchbase records. With 260 matching companies in Refolk’s index, the density of senior engineers, designers, and founders is unusually high.

At Series C, teams tend to be small, ambitious, and on the hunt for senior talent. The companies on this list are good signals for where the San Francisco talent market is heating up - and for which engineers and founders are about to become tomorrow’s operators.

Refolk converts this list into a live search. Ask for “founders of Series C companies in San Francisco” or “senior engineers at Series C companies in San Francisco hiring” and Refolk returns a ranked shortlist with evidence behind each match.

How this list is built

Refolk pulled Series C companies headquartered in San Francisco from public LinkedIn and Crunchbase records, ranked them by current employee count, and kept those with at least 5 employees. The list refreshes once a day.

Last refreshed: Wed, 05 Aug 2026 11:09:42 GMT

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The list draws on the public company graph - headcount and growth signals, funding history, and recency. The criteria chips at the top show exactly which filters produced it, and the methodology section explains the ranking.

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