# Y Combinator's Cloud Investments: 40 Startups in Its Portfolio (2026) > The 40 Cloud startups Y Combinator has backed, by stage: $1.1B raised between them. From the rounds we track; updated nightly. Source: https://millionrounds.com/portfolio-maps/y-combinator-cloud-portfolio (Millionrounds; every figure on the page links to its filing or article) ## Pre-seed and seed 20 - [Ditto](https://millionrounds.com/company/ditto) - [Ubicloud](https://millionrounds.com/company/ubicloud) - [Armory](https://millionrounds.com/company/armory) - [Massdriver](https://millionrounds.com/company/massdriver) - [Formal](https://millionrounds.com/company/formal) - [*M* Middleware](https://millionrounds.com/company/middleware) - [SigNoz](https://millionrounds.com/company/signoz) - [Lilac](https://millionrounds.com/company/lilac) - [*M* Mystic](https://millionrounds.com/company/mystic) - [Terracotta AI](https://millionrounds.com/company/terracotta-ai) - [Integrated Reasoning](https://millionrounds.com/company/integrated-reasoning) - [WarpBuild](https://millionrounds.com/company/warpbuild) - [*F* Flynn](https://millionrounds.com/company/flynn) - [Taloflow](https://millionrounds.com/company/taloflow) - [Telophase](https://millionrounds.com/company/telophase) - [Pig](https://millionrounds.com/company/pig) - [Celest](https://millionrounds.com/company/celest) - [NetworkOcean](https://millionrounds.com/company/networkocean) - [Sunpia](https://millionrounds.com/company/sunpia) - [CryptoSeal](https://millionrounds.com/company/cryptoseal) ## Series A 9 - [CoreOS](https://millionrounds.com/company/coreos) - [Infracost](https://millionrounds.com/company/infracost) - [Momento](https://millionrounds.com/company/momento) - [Summit Wealth Systems](https://millionrounds.com/company/summit-wealth-systems) - [Quindar](https://millionrounds.com/company/quindar) - [IMTC](https://millionrounds.com/company/imtc) - [*K* Kaleidoscope](https://millionrounds.com/company/kaleidoscope) - [Depot](https://millionrounds.com/company/depot) - [Compose](https://millionrounds.com/company/compose) ## Series B 5 - [Hive](https://millionrounds.com/company/hive) - [Convex](https://millionrounds.com/company/convex) - [OXIO](https://millionrounds.com/company/oxio) - [dotCloud](https://millionrounds.com/company/dotcloud) - [Petabyte Technology](https://millionrounds.com/company/petabyte-technology) ## Series C and later 3 - [Blacksmith](https://millionrounds.com/company/blacksmith) - [Fly.io](https://millionrounds.com/company/fly-io) - [Archera](https://millionrounds.com/company/archera) ## Stage not reported 3 - [TrueVault](https://millionrounds.com/company/truevault) - [Paragon](https://millionrounds.com/company/paragon) - [Ryvn](https://millionrounds.com/company/ryvn) ## Segment by segment ### Pre-seed and seed 20 startups · $254M raised - [**Ditto**](https://millionrounds.com/company/ditto) The only mobile database with built-in edge device connectivity and resiliency United States $104M - [**Ubicloud**](https://millionrounds.com/company/ubicloud) Ubicloud is an open source cloud that can run anywhere where users can use our managed service to reduce your cloud spend by 310x. United States $66M - [**Armory**](https://millionrounds.com/company/armory) Armory is an enterprise software company commercializing the open-source continuous delivery platform, Spinnaker. United States $40M - [**Massdriver**](https://millionrounds.com/company/massdriver) Massdriver is an internal development platform and cloud operations platform that simplifies the management of Infrastructure as Code (IaC). United States $8.0M - [**Formal**](https://millionrounds.com/company/formal) Formal is a SaaS technology startup that builds operating system for data of the modern company. United States $6.8M - [*M* **Middleware**](https://millionrounds.com/company/middleware) Middleware offers development and solutions in the information technology sector. United States $6.5M - [**SigNoz**](https://millionrounds.com/company/signoz) SigNoz is an open-source observability platform designed to provide a cost-effective alternative to traditional monitoring solutio United States $5.4M - [**Lilac**](https://millionrounds.com/company/lilac) Lilac offers an end-to-end data and analytics platform for payers United States $4.5M ### Series A 9 startups · $185M raised - [**CoreOS**](https://millionrounds.com/company/coreos) CoreOS builds industry-leading infrastructure software to securely run application containers anywhere. United States $48M - [**Infracost**](https://millionrounds.com/company/infracost) Infracost is a cloud cost management platform founded in 2020 by Hassan Khajeh-Hosseini, Ali Khajeh-Hosseini, and Alistair Scott. United States $34M - [**Momento**](https://millionrounds.com/company/momento) Momento is a premier wedding photography and videography company that services Las vegas & Reno Nevada United States $25M - [**Summit Wealth Systems**](https://millionrounds.com/company/summit-wealth-systems) Summit Wealth Systems is a cloud software company that enables wealth managers and their clients with abundance. United States $20M - [**Quindar**](https://millionrounds.com/company/quindar) Quindar is a private aerospace and defense software company founded in 2022, headquartered in Lafayette, Colorado. United States $18M - [**IMTC**](https://millionrounds.com/company/imtc) IMTC, formerly known as CBXmarket, is a private fintech company based in New York City, specializing in cloud-based technology sol United States $12M - [*K* **Kaleidoscope**](https://millionrounds.com/company/kaleidoscope) Kaleidoscope specializes in offering a wide range of gymnastics, cheer, dance, holiday camps, and parties. United States $11M - [**Depot**](https://millionrounds.com/company/depot) Depot is a developer-first build platform founded in 2022, designed to enhance software development workflows by addressing CI (Co United States $10M ### Series B 5 startups · $362M raised - [**Hive**](https://millionrounds.com/company/hive) Hive provides cloud-based AI solutions for understanding, searching, and generating content United States $127M - [**Convex**](https://millionrounds.com/company/convex) Convex is a San Francisco-based company that offers an open-source reactive backend platform designed for web developers. United States $120M - [**OXIO**](https://millionrounds.com/company/oxio) oxio is a Canadian telecommunications company that focuses on providing reliable and transparent home internet services. Mexico $72M - [**dotCloud**](https://millionrounds.com/company/dotcloud) DotCloud is a second generation PaaS platform that is the commercial entity behind Docker an open source app portability project. United States $29M - [**Petabyte Technology**](https://millionrounds.com/company/petabyte-technology) Petabyte Technology provides a veterinary management solution that emphasizes practice productivity and exceptional patient care. United States $15M ### Series C and later 3 startups · $273M raised - [**Blacksmith**](https://millionrounds.com/company/blacksmith) Blacksmith is a managed Continuous Integration (CI) cloud service that serves as a drop-in replacement for GitHub Actions runners. United States $131M - [**Fly.io**](https://millionrounds.com/company/fly-io) Fly.io is a developer-focused global application platform that allows teams to run web, AI, and application workloads close to end United States $95M - [**Archera**](https://millionrounds.com/company/archera) Archera provides a cloud cost optimization solution for companies to save time and money on their cloud costs, without any risk. United States $47M ### Stage not reported 3 startups · $12M raised - [**TrueVault**](https://millionrounds.com/company/truevault) TrueVault is a San Francisco-based company founded in 2013 that specializes in data privacy compliance software and a HIPAA-compli United States $6.2M - [**Paragon**](https://millionrounds.com/company/paragon) Paragon is a now part of CGI (cgi.com), a global IT and business consulting services firm. United States $5.5M - [**Ryvn**](https://millionrounds.com/company/ryvn) Ryvn is a software deployment automation platform based in San Francisco, founded in 2024 by Albert Lam and Shardool Patel. United States $500K **How this map is made.** Every startup here works in Cloud and has raised money in a round we track that names Y Combinator as an investor. Each sits under the stage of its latest round. Rebuilt nightly; updated 15 November 2026. ## More portfolio maps [All portfolios](https://millionrounds.com/portfolio-maps) [Sector portfolio **Y Combinator's AI portfolio** 1,143 startups · $44B](https://millionrounds.com/portfolio-maps/y-combinator-ai-portfolio)[Sector portfolio **Y Combinator's Fintech portfolio** 338 startups · $24B](https://millionrounds.com/portfolio-maps/y-combinator-fintech-portfolio)[Sector portfolio **Y Combinator's Big Data & Analytics portfolio** 201 startups · $3.4B](https://millionrounds.com/portfolio-maps/y-combinator-big-data-analytics-portfolio)[Sector portfolio **Y Combinator's Healthtech portfolio** 150 startups · $4.2B](https://millionrounds.com/portfolio-maps/y-combinator-healthtech-portfolio)[Sector portfolio **Y Combinator's IT Services portfolio** 148 startups · $840M](https://millionrounds.com/portfolio-maps/y-combinator-it-services-portfolio)[Sector portfolio **Y Combinator's Web3 & Crypto portfolio** 139 startups · $7.4B](https://millionrounds.com/portfolio-maps/y-combinator-web3-crypto-portfolio) ## Raising from investors like Y Combinator? 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