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Developer Tools Startups funded by Y Combinator (YC) 2026
March 2026
Browse 464 of the top Developer Tools startups funded by Y Combinator.
We also have a Startup Directory where you can search through over 5,000 companies.
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GitLab
• Public
• 2,000 employees
• San Francisco, CA, USA
GitLab is the first single application for the entire DevOps lifecycle. Only GitLab enables Concurrent DevOps, unlocking organizations from the constraints of today’s toolchain. GitLab provides unmatched visibility, radical new levels of efficiency and comprehensive governance to significantly compress the time between planning a change and monitoring its effect. This makes the software lifecycle 200% faster, radically improving the speed of business.
GitLab and Concurrent DevOps collapses cycle times by driving higher efficiency across all stages of the software development lifecycle. For the first time, Product, Development, QA, Security, and Operations teams can work concurrently in a single application. There’s no need to integrate and synchronize tools, or waste time waiting for handoffs. Everyone contributes to a single conversation, instead of managing multiple threads across disparate tools. And only GitLab gives teams complete visibility across the lifecycle with a single, trusted source of data to simplify troubleshooting and drive accountability. All activity is governed by consistent controls, making security and compliance first-class citizens instead of an afterthought.
Built on Open Source, GitLab leverages the community contributions of thousands of developers and millions of users to continuously deliver new DevOps innovations. More than 100,000 organizations from startups to global enterprise organizations, including Ticketmaster, Jaguar Land Rover, NASDAQ, Dish Network and Comcast trust GitLab to deliver great software at new speeds.
open-source
developer-tools
devsecops
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Algolia
• Active
• 810 employees
• San Francisco, CA, USA
Our mission is to make every search interaction meaningful & rewarding, through developer-friendly and enterprise-grade APIs.
Algolia is the leading Search & Discovery API for websites and mobile apps. We help the most innovative companies across e-commerce, media and SaaS industries create powerful, relevant and scalable discovery experiences for their users. Unlike other solutions, our hosted platform reduces the complexities of building and scaling a fast, relevant digital experience and helps teams accelerate development time. More than 9,000 companies like Under Armour, Twitch, Periscope, Medium and Stripe rely on Algolia to manage 50+ billion search queries a month.
Founded in 2012, we're backed by $184M in funding from Accel Partners, Alven Capital, Point Nine Capital and Storm Ventures. The team is headquartered in San Francisco with offices in Paris, London, New York, and Atlanta. To learn more, visit www.algolia.com.
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We’re looking for talented, passionate people to build the world’s best search technology. As an ownership-driven company, we seek team members who thrive under autonomy and diversity.
We're committed to building an inclusive and diverse workplace. We care about each other and the world around us, and embrace talented people regardless of their race, age, ancestry, religion, sex, gender identity, sexual orientation, marital status, color, veteran status, disability and socioeconomic background
developer-tools
saas
b2b
• Public
• 750 employees
• San Francisco, CA, USA
Since graduating from YC, Amplitude (W12) has made it to IPO and beyond by helping cutting edge startups become category leaders. We’ve pioneered the digital analytics category to become the go-to solution for AI pioneers (Cruise, Midjourney), apps that touch millions of consumers (Doordash, Coinbase), and the best in B2B (Atlassian, Rippling, Canva).
With product analytics, experiment, CDP, session replay, and more, Amplitude’s digital analytics platform shows you what your users love, where they’re getting stuck, and what keeps them coming back. You want to build a generational business, and we have the capabilities and pricing plans to guide you every step of the way. Check out our special deal for YC companies and get started on your analytics journey.
b2b
analytics
data-visualization
developer-tools
marketing
• Active
• 5 employees
• San Francisco, CA, USA
Interfaze is an AI model built on a new architecture that merges specialized DNN/CNN models with LLMs for developer tasks that require deterministic output and high consistency like OCR, web scraping, classification, Speech-to-text (STT) and more.
Read paper:https://arxiv.org/abs/2602.04101
deep-learning
developer-tools
generative-ai
•
Sazabi
• Active
• 10 employees
• San Francisco, CA, USA
The AI-native observability platform for fast-moving engineering teams. Backed by tastemakers from the world's top AI companies: Vercel, Graphite, Daytona, Browserbase, LangChain, Mastra, Replit, and more.
developer-tools
•
Stage
• Active
• 2 employees
Teams are shipping faster than ever with AI, but engineers are merging changes that neither they nor their reviewers fully understand, leading to bugs in production and overwhelming cognitive debt.
Stage is a new code review platform built for today’s fast moving teams. Instead of forcing readers to piece things together from unorganized diffs, Stage breaks changes down into structured chapters so teams can understand what's happening and ship with confidence.
saas
developer-tools
•
Runtime
• Active
• 3 employees
• San Francisco, CA, USA
Runtime (runtm.com) gives engineering teams control and visibility to enable anyone in their org to use coding agents securely.