Radar · Open Source in San Francisco
Best Open Source Companies in San Francisco, United States
The 169 best Open Source companies in San Francisco, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Databricks.
By Riya SenguptaFinancials
169companies tracked
$9.7Bdisclosed funding
9unicorns
108have raised
Ranked: Best Open Source companies in San Francisco
| # | Company | Disclosed funding | Last round | Employees | Founded | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|
| 1 | Databricks 🦄 Data and AI platform that unifies analytics 97Fin. health top 11%Market top 12%Innovation top 15%AI top 15% All 14 signals ▾Fin. healthtop 11% Markettop 12% Innovationtop 15% AItop 15% Techtop 16% Talenttop 16% Fundingtop 17% Moattop 18% Patentstop 21% Growthtop 32% Newstop 32% Globaltop 36% Producttop 36% Partnersbottom 48% Fin. health: Revenue ~$2.6B Market: 3,299 employees (top 2% of Enterprise Infrastructure) · Revenue ~$2.6B rank vs industry peers · Fliar Intelligence Index 97/100 | $3.6B | 4 mo ago | 3,299 | 2013 | SentryApple iCloud MailGoogle Workspace+43 | 231 patents Optimizing lakehouse queries, transactions, and ML-driven indexing for large-scale data processing. | 4 launchs · 1 award |
| 2 | Automattic 🦄 Developer of open-source content management system | $896M | 64 mo ago | 788 | 2005 | WordPress Site EditorWordPressMySQL+19 | 2 patents Website botnet detection and mitigation for network security | — |
| 3 | Gitlab Provider of a platform for software development, security, and delivery | $435M | 45 mo ago | 699 | 2011 | — | 34 patents Automation and security of software development pipelines, including code testing and vulnerability analysis. | 2 launchs |
| 4 | GitHub Developer of software collaboration tools and automated code management systems | $354M | 83 mo ago | 2,193 | 2014 | ContentfulApple iCloud MailMicrosoft 365+17 | 35 patents Software development platform features: code repository caching, semantic diff generation, and distributed RPC synchronization. | — |
| 5 | HashiCorp 🦄 AI based cloud infrastructure management solutions | $349M | 75 mo ago | 2,200 2,200 → 2,210 (+0%) | 2012 | DatoCMSSentryApple iCloud Mail+31 | 84 patents Automating, securing, and managing multi-cloud infrastructure and zero‑trust networking | — |
| 6 | Corelight Provider of criminal intelligence andd analytics platform for public safety | $310M | 25 mo ago | 306 | 2013 | HubSpot CMS HubApple iCloud MailGoogle Workspace+30 | 17 patents SSH session authentication and keystroke analysis for network traffic classification | 1 launch |
| 7 | Anyscale 🦄 Provider of an AI-based open source framework for building distributed applications | $260M | 56 mo ago | 97 | 2019 | ContentfulSentryNode.js+25 | 3 patents Improving container startup speed with block storage and cloud‑based development environments | — |
| 8 | MuleSoft 🦄 Cloud based API management platform | $259M | 120 mo ago | 663 663 → 1,120 (+69%) | 2006 | WordPressMySQLMariaDB+34 | 30 patents Automated API integration, data mapping, and schema transformation for enterprise software connectivity. | 3 launchs |
| 9 | Kong 🦄 Cloud based API management and microservices connectivity platform 84Tech top 18%Patents top 20%Funding top 21%Moat top 22% All 11 signals ▾Techtop 18% Patentstop 20% Fundingtop 21% Moattop 22% Innovationtop 30% Markettop 33% Globaltop 37% Growthtop 38% Talenttop 38% Producttop 41% Newsbottom 21% Tech: 76 technologies across 6/8 capability areas · Cloud: Amazon Cloudfront, Amazon S3 Patents: 188 patents matched (strict assignee match) · 44 filings since 2022 vs 44 in 2017-21 rank vs industry peers · Fliar Intelligence Index 84/100 | $249M | 19 mo ago | 128 | 2009 | SentryApple iCloud MailGoogle Workspace+35 | 188 patents AI-driven API gateway and microservices orchestration for intelligent query routing and documentation | — |
| 10 | Lucidworks Provider of AI-powered search and discovery platform for digital experiences | $218M | 82 mo ago | 210 210 → 205 (-2%) | 2007 | WordPress Block EditorWordPressMySQL+37 | — | — |
| 11 | Sentry 🦄 Provider of application performance monitoring and error tracking software solutions | $217M | 49 mo ago | 232 232 → 453 (+95%) | 2011 | SentryZendeskApple iCloud Mail+21 | 22 patents Transformer rapid depressurization and explosion mitigation vent systems | 1 launch |
| 12 | Airbyte 🦄 Developer of a platform for data integration and movement | $181M | 54 mo ago | 82 | 2020 | WebflowGSAPSwiper+31 | 2 patents Data integration connectors for ETL/ELT pipelines. | — |
| 13 | Aerospike Open source based NoSQL database platform for enterprises | $171M | 18 mo ago | 226 | 2009 | ContentfulSentryZendesk+28 | — | 2 launchs |
| 14 | InfluxData Developer of a time series database platform for various applications | $171M | 40 mo ago | 181 181 → 170 (-6%) | 2012 | WordPressContentfulApple iCloud Mail+37 | — | 5 launchs |
| 15 | SignalFx Cloud-based cloud monitoring solutions proivder | $148M | 84 mo ago | 178 | 2013 | — | 45 patents Real-time monitoring and analytics of instrumented software data streams | — |
| 16 | Neon Developer of open-source-based cloud-native PostgreSQL | $131M | 22 mo ago | 63 | 2021 | Apple iCloud MailGoogle WorkspaceNode.js+21 | 3 patents AI-driven selection of high‑valence images for affective computing and content recommendation | 1 launch |
| 17 | Particle Developer of a prototype to production connectivity platform for IoT 55Tech top 23%Funding top 24%Customers top 24%News top 30% All 12 signals ▾Techtop 23% Fundingtop 24% Customerstop 24% Newstop 30% Moattop 35% Growthtop 40% Producttop 47% Talentbottom 49% Marketbottom 47% Patentsbottom 39% Globalbottom 39% Innovationbottom 35% Tech: 67 technologies across 6/8 capability areas · Cloud: Amazon Cloudfront, Amazon S3 Funding: Raised $130M across 8 rounds · 8 rounds over 12 yrs (0.7/yr) rank vs industry peers · Fliar Intelligence Index 55/100 | $130M | 15 mo ago | 109 109 → 110 (+1%) | 2011 | Cart FunctionalityShopifyApple iCloud Mail+31 | 5 patents Pharma skin‑inflammation formulations, audio speaker hardware, VR headset devices, graphic‑design software. | 1 launch |
| 18 | Rudder Stack Provider of a customer data platform for data collection and integration | $82M | 52 mo ago | 194 | 2019 | SanitySentryAlgolia+39 | — | 4 launchs · 1 award |
| 19 | Armory Provider of AI-powered platform for software delivery and DevOps automation | $82M | 68 mo ago | 63 | 2016 | — | 11 patents Ballistic armor manufacturing and automated continuous software deployment systems | — |
| 20 | Splice Machine Relational Database powered by HBASE and Hadoop | $75M | 87 mo ago | 6 | 2012 | — | — | — |
| 21 | Rasa Developer of a platform for building and deploying AI agent solutions | $71M | 28 mo ago | 26 | 2016 | WebflowApple iCloud MailGoogle Workspace+29 | — | — |
| 22 | Mosaic Ml Provider of an open-source and cloud-based AI training platform | $64M | 56 mo ago | 76 | 2020 | — | 394 patents Advanced fertilizer and potash processing, ammonia synthesis, and mining equipment technologies. | 1 launch |
| 23 | Meteor Cloud-based cross-platform application development solutions | $62M | 84 mo ago | 112 | 2011 | HexoAlgoliaNode.js+23 | 6 patents Social media content-sharing analytics for targeted advertising and trajectory tracking | 2 launchs |
| 24 | Streamlit Provider of a Python app framework for machine learning and data science applications | $62M | 62 mo ago | 21 | 2018 | MediumApple iCloud MailGoogle Workspace+20 | — | — |
| 25 | CollabNet AI-powered platform for software development, delivery, and digital transformation | $60M | 139 mo ago | 136 | 1999 | JavaJettySalesforce Marketing Cloud Account Engagement+2 | 9 patents Automating distributed software design chains and on-demand build/test environment deployment. | — |
| 26 | Dagster AI-based data preparation and integration software solution provider | $47M | 36 mo ago | 33 | 2018 | TurbopackNode.jsTailwind CSS+26 | — | — |
| 27 | Gatsby Platform offering frameworks for website and application development | $47M | 72 mo ago | 47 | 2015 | ContentfulSentryZendesk+13 | — | — |
| 28 | Azul Systems Provider of Java platform designed for modern cloud enterprise deployments | $40M | 75 mo ago | 85 | 2002 | WordPressApple iCloud MailMicrosoft 365+29 | — | 1 launch · 1 award |
| 29 | PostHog 🦄 Cloud based product analytics tools 72Funding top 23%Tech top 23%Moat top 31%Growth top 35% All 9 signals ▾Fundingtop 23% Techtop 23% Moattop 31% Growthtop 35% Newstop 37% Talenttop 38% Partnerstop 41% Markettop 47% Globalbottom 36% Funding: Raised $39.0M across 7 rounds · 7 rounds over 6 yrs (1.2/yr) Tech: 56 technologies across 6/8 capability areas · Cloud: Amazon Cloudfront, Amazon Ses rank vs industry peers · Fliar Intelligence Index 72/100 | $39M | 8 mo ago | 36 | 2020 | SentryZendeskApple iCloud Mail+29 | — | 1 launch |
| 30 | FOSSA Provider of software composition analysis platform for managing open source components | $39M | 32 mo ago | 33 33 → 60 (+82%) | 2015 | Node.jsThree.jsRadix UI+26 | — | — |
| 31 | Cal.com Provider of an open-source and cloud-based scheduling platform | $32M | 50 mo ago | 22 | 2021 | TurbopackSentryApple iCloud Mail+28 | — | — |
| 32 | Gradle Open source based suite of build tools solution | $31M | 55 mo ago | 19 | 2008 | SentryZendeskApple iCloud Mail+30 | — | — |
| 33 | ProjectDiscovery Provider of cloud-based and open source asset management software | $28M | 34 mo ago | 3 | 2019 | SentryBetter StackApple iCloud Mail+21 | — | 1 launch |
| 34 | Fleet Device Management Provider of open-source software to manage data from devices | $25M | 13 mo ago | 46 | 2020 | Apple iCloud MailGoogle WorkspaceNode.js+30 | — | — |
| 35 | Outerbounds AI-based open-source machine learning platform | $24M | 40 mo ago | 18 | 2021 | WebflowAmazon Web ServicesSplide+22 | — | — |
| 36 | DGraph Cloud based open source distributed graph database | $24M | 47 mo ago | 2 | 2016 | DiscourseRubyRuby on Rails+11 | — | — |
| 37 | NocoDB Cloud based solution for converting databases into spreadsheets | $21M | 44 mo ago | 1 | 2021 | SentryNode.jsLeaflet+12 | — | — |
| 38 | Foxglove Provider of visualization and debugging solutions for robotics | $19M | 8 mo ago | 31 | 2020 | WebflowApple iCloud MailGoogle Workspace+14 | — | — |
| 39 | Forward Commerce Provider of embedded payment solutions and support for software platforms | $16M | 24 mo ago | — | 2012 | Cart FunctionalitySentryApple iCloud Mail+15 | — | — |
| 40 | Svix Provider of webhook infrastructure for sending, receiving, and testing webhooks | $13M | 39 mo ago | 10 | 2021 | TurbopackApple iCloud MailGoogle Workspace+18 | — | 2 launchs |
| 41 | Fern Provider of SaaS-based open-source format for APIs | $13M | 14 mo ago | 2 | 2022 | WebflowRiveStripe+16 | — | 1 launch |
| 42 | Meltano Provider of open-source extract, load and transform pipelines for DataOps | $12M | 48 mo ago | 9 | 2018 | GSAPReactGatsby+22 | — | 1 job opening · 2 launchs |
| 43 | FlowFuse Open-source low-code programming tool | $7M | 12 mo ago | 13 | 2021 | YouTubeTailwind CSSStripe+19 | — | — |
| 44 | Carbon Developer of intelligent robotic arms | $7M | 30 mo ago | 20 | 2014 | — | 753 patents Polymer-based additive manufacturing, including resin handling, curing, and composite printing | — |
| 45 | Promptfoo Open-source tool to test AI applications | $5M | 11 mo ago | — | 2023 | DocusaurusReactKnockout.js+14 | — | — |
| 46 | SubImage Open source based cloud infrastructure visualization platform 16Funding top 39%Talent bottom 49%Tech bottom 40%Global bottom 33% All 5 signals ▾Fundingtop 39% Talentbottom 49% Techbottom 40% Globalbottom 33% Marketbottom 25% Funding: Raised $4.7M across 2 rounds · 2 rounds over 1 yrs (2.0/yr) Talent: 1 named leader on record · 1 C-suite/founder profile curated rank vs industry peers · Fliar Intelligence Index 16/100 | $5M | 6 mo ago | — | 2024 | Cart FunctionalityApple iCloud MailNode.js+11 | — | — |
| 47 | Artie Open source data integration platform for databases and data warehouses | $4M | 28 mo ago | 5 | 2023 | — | 23 patents Personalized gaming experiences and dynamic NFT-based virtual assets for interactive platforms | 2 launchs · 1 partnership |
| 48 | Klavis AI Open-source infrastructure for building, scaling, and integrating Multiple Context Protocol (MCP) solutions… | $500K | 12 mo ago | — | 2025 | Node.jsRadix UITailwind CSS+12 | — | — |
| 49 | superglue Open source based data integration platform | $500K | 12 mo ago | — | 2024 | Node.jsRadix UITailwind CSS+8 | — | — |
| 50 | Continue Developer of AI agents that suggest code improvements on pull requests | $500K | 15 mo ago | — | 2023 | SanityTurbopackApple iCloud Mail+20 | — | — |
Top 12 Open Source companies in San Francisco
#1
Series K · San Francisco, California · founded 2013 · 3299 employees$3.6Braised▾
Series K · San Francisco, California · founded 2013 · 3299 employees
Data and AI platform that unifies analytics. Its main site highlights building apps, agents, and AI on your data, with pricing based on pay-as-you-go usage. The platform offers data management, warehousing, engineering, and science capabilities. It facilitates data sharing, governance, and application development. The platform supports business intelligence and database functionalities.
Fliar Intelligence Index™ 97how this company ranks against its industry peers
Fin. health
top 11%Market
top 12%Innovation
top 15%AI
top 15%Tech
top 16%Talent
top 16%Fin. health: Revenue ~$2.6B
Market: 3,299 employees (top 2% of Enterprise Infrastructure) · Revenue ~$2.6B · Top-100,000 web property
Innovation: 231 patents (top 6% of patent-holders) · 197 filings since 2022 vs 34 in 2017-21 · 13 new-product events in 24 mo
Audience (LinkedIn): 1.3M LinkedIn followers — 12.7% of this cohort's audience
Activity (LinkedIn): 4 product launches · 1 awards announced in 12 mo
Funding rounds
- Jan 2026Conventional Debt$2B
- Dec 2025Unattributed$5B
- Sep 2025Series K$1B
- Jan 2025Conventional Debt$5.2B
Founders & team
Investors
Nvidia, Capital One, Andreessen Horowitz, Fidelity Investments, Insight Partners, Tiger Global Management
Tech stack
6SenseAdobe Audience ManagerAmazon AlbAmazon CloudfrontAmazon S3Amazon Ses
#2
PostHog 🦄Series E · San Francisco, California · founded 2020 · 36 employees$39Mraised▾
PostHog 🦄
Series E · San Francisco, California · founded 2020 · 36 employees
Cloud based product analytics tools. Features of the product include user behavior analysis, analyzation of trends, funnels, retention, and cohorts, compatibility, data access, and more. It also provides data retention, supports SSO SAML, exports to data lakes, pricing models, analytics stack, and more.
Fliar Intelligence Index™ 72how this company ranks against its industry peers
Funding
top 23%Tech
top 23%Moat
top 31%Growth
top 35%News
top 37%Talent
top 38%Funding: Raised $39.0M across 7 rounds · 7 rounds over 6 yrs (1.2/yr) · Last round Series E (Sep 2025)
Tech: 56 technologies across 6/8 capability areas · Cloud: Amazon Cloudfront, Amazon Ses · Devops: Envoy
Moat: Editorial + unicorn rating 7/10 · Unicorn · 10 curated direct competitors tracked
Audience (LinkedIn): 50k LinkedIn followers
Activity (LinkedIn): 1 product launches announced in 12 mo
Funding rounds
- Sep 2025Series E$75M
- Jun 2025Series D$70M
- Jun 2025Series C$10M
- Jun 2021Series B$15M
Founders & team
Investors
Google Ventures, Y Combinator, Stripe, Formus Capital, Peak XV Partners, Uncorrelated Ventures
Tech stack
Amazon SesAmazon Web ServicesAmplitudeApple Icloud MailBase UiCloudflare
#3
Acquired · San Francisco, California · founded 2011 · 109 employees$129.9Mraised▾
Acquired · San Francisco, California · founded 2011 · 109 employees
Developer of a prototype to production connectivity platform for IoT. Its Photon Wi-Fi and the Electron 2G3G cellular are primary prototyping platforms for integrating connectivity into devices. The product is primarily aimed at designers and developers rather than at enterprises.
Fliar Intelligence Index™ 55how this company ranks against its industry peers
Tech
top 23%Funding
top 24%Customers
top 24%News
top 30%Moat
top 35%Growth
top 40%Tech: 67 technologies across 6/8 capability areas · Cloud: Amazon Cloudfront, Amazon S3 · Devops: Nginx
Funding: Raised $130M across 8 rounds · 8 rounds over 12 yrs (0.7/yr) · Last round Series C (Mar 2025)
Customers: App rating 4.2★ (289 reviews) · Marquee-customer mentions: top 30% of tracked companies
Audience (LinkedIn): 24k LinkedIn followers
Activity (LinkedIn): 1 product launches announced in 12 mo
Funding rounds
- Mar 2025Series C$5M
- Dec 2022Series C$12.2M
- Nov 2021Series C$30M
- Nov 2019Series C$40M
Founders & team
Investors
O'Reilly AlphaTech Ventures, Root Ventures, HAX, Collab Fund, Spark Capital, Qualcomm Ventures
Tech stack
AceAmazon CloudfrontAmazon S3Amazon Web ServicesAmerican ExpressApple Icloud Mail
#4
Kong 🦄Series E · San Francisco, California · founded 2009 · 128 employees$249.3Mraised▾
Kong 🦄
Series E · San Francisco, California · founded 2009 · 128 employees
Cloud based API management and microservices connectivity platform. It operates through RESTful API and is built on NGINX. It inspects and monitors APIs and microservice traffic. It provides ready to deploy plugins and adds functionality to APIs and applications. It also offers the flexibility to run on the cloud of the users choice such as AWS, Azure, Google Cloud. It has clients such as Cisco, GSK, Paypal, etc.
Fliar Intelligence Index™ 84how this company ranks against its industry peers
Tech
top 18%Patents
top 20%Funding
top 21%Moat
top 22%Innovation
top 30%Market
top 33%Tech: 76 technologies across 6/8 capability areas · Cloud: Amazon Cloudfront, Amazon S3 · Devops: Nginx
Patents: 188 patents matched (strict assignee match) · 44 filings since 2022 vs 44 in 2017-21 · Latest publication 2026
Funding: Raised $249M across 7 rounds · 7 rounds over 16 yrs (0.4/yr) · Last round Series E (Nov 2024)
Funding rounds
- Nov 2024Series E—
- Aug 2024Series D$80M
- Dec 2020Series D$100M
- Dec 2018Series C$43M
Founders & team
Investors
Andreessen Horowitz, CRV, Index Ventures, Tiger Global Management, GGV Capital, World Innovation Lab
Tech stack
6SenseAdrollAdroll Cmp SystemAlpine.JsAmazon CloudfrontAmazon S3
#5
Series B · San Francisco, California · founded 2020 · 31 employees$18.7Mraised▾
Series B · San Francisco, California · founded 2020 · 31 employees
Provider of visualization and debugging solutions for robotics. It allows users to use customizable layouts for the arrangement of interactive visualizations and understanding the activities of robots. It provides built-in panels for displaying robots in 3D, plotting message values, publishing messages, displaying messages, tracking, and detecting state transitions.
LinkedIn Pulse recent public activity · Jul 2026
Audience: 21k LinkedIn followers
Funding rounds
- Sep 2025Series B$40M
- Oct 2022Series A$15M
- Jan 2022Seed$3.7M
Founders & team
Investors
Amplify Partners, Eclipse, Boost VC, Bessemer Venture Partners, Amplify, SkyGate Digital
Tech stack
Apple Icloud MailAstroCloudflareCloudflare Browser InsightsDocusaurusEmotion
#6
Series E · San Francisco, California · founded 2009 · 226 employees$171Mraised▾
Series E · San Francisco, California · founded 2009 · 226 employees
Open source based NoSQL database platform for enterprises. It offers a distributed NoSQL database optimized for storage with key-value store architecture for real-time web applications. The platform processes transactions, documents, graphs, and vectors for real time operations and decisioning.
LinkedIn Pulse recent public activity · Jul 2026
Audience: 36k LinkedIn followers
Activity: 2 product launches announced in 12 mo
Funding rounds
- Dec 2024Conventional Debt$30M
- Apr 2024Series E$109M
- Nov 2019Series D$32M
- Jul 2014Series C$20M
Investors
Alsop Louie Partners, Columbus Nova Technology Partners, New Enterprise Associates, Draper, Kalpathi Investments, Sumeru Equity Partners
Tech stack
AddtoanyAddtoany Share ButtonsAlgoliaAmazon S3Amazon SesAmazon Web Services
#7
Seed · San Francisco, California · founded 2024$4.7Mraised▾
Seed · San Francisco, California · founded 2024
Open source based cloud infrastructure visualization platform. It is a software company that provides a tool for organizations to map their infrastructure, highlighting potential attack paths and weak points that could lead to sensitive data exposure. The platform aims to give security teams visibility and focus on the most critical risks. The platform helps organizations improve their security posture by identifying vulnerabilities and prioritizing remediation efforts.
Fliar Intelligence Index™ 16how this company ranks against its industry peers
Funding
top 39%Talent
bottom 49%Tech
bottom 40%Global
bottom 33%Market
bottom 25%Funding: Raised $4.7M across 2 rounds · 2 rounds over 1 yrs (2.0/yr) · Last round Seed (Nov 2025)
Talent: 1 named leader on record · 1 C-suite/founder profile curated
Tech: 14 technologies across 3/8 capability areas · Cloud: Amazon Web Services, Fastly · Devops: Varnish
Audience (LinkedIn): 865 LinkedIn followers
Funding rounds
- Nov 2025Seed$4.2M
- 2025Seed$500K
Founders & team
Investors
Y Combinator, FundersClub, Phosphor Capital, Transpose Platform
Tech stack
Amazon Web ServicesApple Icloud MailCart FunctionalityFastlyGithub PagesNext.Js
#8
Series B · San Francisco, California · founded 2020 · 46 employees$25Mraised▾
Series B · San Francisco, California · founded 2020 · 46 employees
Provider of open-source software to manage data from devices. The platform enables users to collect and control data for servers, PCs, and laptops. Its offering includes inventory management tools, data collaboration tools, monitoring tools, and deployment tools. Offers a subscription-based pricing model.
LinkedIn Pulse recent public activity · Jul 2026
Audience: 12k LinkedIn followers · 30 engagements/post (1.7× cohort median)
Funding rounds
- May 2025Series B$27.9M
- Apr 2022Series A$20M
- Jan 2022Seed$5M
Founders & team
Investors
CRV, Ten Eleven Ventures, Open Core Ventures, Moonfire, StoneMill Ventures
Tech stack
AceActivecampaignApple Icloud MailBabelBootstrapChart.Js
#9
Series B · San Francisco, California · founded 2021 · 63 employees$130.6Mraised▾
Series B · San Francisco, California · founded 2021 · 63 employees
Developer of open-source cloud-native Postgres designed to create a cloud-native database service for developers. The company's system separates storage and computes to offer autoscaling, branching, and bottomless storage, as well as offer, features such as reliability, auto-backup, and open-source, enabling SaaS companies to enhance engineering velocity and reduce cost.
LinkedIn Pulse recent public activity · Jul 2026
Audience: 18k LinkedIn followers
Activity: 1 product launches announced in 12 mo
Founders & team
Investors
M12, Abstract Ventures, General Catalyst, Menlo Ventures, Notable Capital, Founders Fund
Tech stack
Amazon SesAmazon Web ServicesApple Icloud MailCloudflareGoogle Tag ManagerGoogle Workspace
#10
Acquired · San Francisco, California · founded 2022 · 2 employees$12.9Mraised▾
Acquired · San Francisco, California · founded 2022 · 2 employees
Provider of SaaS-based open-source format for APIs. It offers a platform to update the SDKs and documentation with API changes. It generates the types and networking logic and presents a postman collection, with successful and unsuccessful requests.
LinkedIn Pulse recent public activity · Jul 2026
Audience: 6k LinkedIn followers
Activity: 1 product launches announced in 12 mo
Funding rounds
- Apr 2025Series A$9M
- 2023Seed$500K
Investors
Bessemer Venture Partners, Y Combinator, V1.VC, Soma Capital, Eight Capital Management
Tech stack
Amazon CloudfrontAmazon S3Amazon Web ServicesCloudflareCloudflare Bot ManagementGoogle Analytics
#11
Series E · San Francisco, California · founded 2013 · 306 employees$310Mraised▾
Series E · San Francisco, California · founded 2013 · 306 employees
Provider of criminal intelligence and analytics platform for public safety. It provides a platform to detect and protect against security and operational anomaly in the enterprise. The product offers a hardware appliance optimized for performance and stability for installation in the IT network. It integrates with existing analysis tools like Splunk, Elastic Search, and Kafka to transform high-volume network traffic into high-fidelity data for incident response, intrusion detection, and forensics. The platform integrates with AI technologies to automate various security processes, improving the efficiency of threat detection and response.
LinkedIn Pulse recent public activity · Jul 2026
Audience: 22k LinkedIn followers
Activity: 1 product launches announced in 12 mo
Funding rounds
- Apr 2024Series E$150M
- Sep 2021Series D$75M
- Oct 2019Series C$50M
- Sep 2018Series B$25M
Founders & team
Investors
Energy Impact Partners, Gaingels, Accel, General Catalyst, Osage University Partners, Insight Partners
Tech stack
6SenseAmazon SesAmazon Web ServicesApple Icloud MailCloudflareCloudflare Bot Management
#12
Acquired · San Francisco, California · founded 2023$5.2Mraised▾
Acquired · San Francisco, California · founded 2023
Open-source tool to test AI applications. The platform enables developers to test and debug LLM applications, identify vulnerabilities, and optimize performance. It runs a customized scan tailored to specific application, detecting issues like PII leaks, insecure tool use, jailbreaks, harmful content, competitor endorsements, political statements, and medical and legal advice.
LinkedIn Pulse recent public activity · Jul 2026
Audience: 6k LinkedIn followers
Funding rounds
- Jul 2025Series A$18.4M
- Jun 2024Seed$5.2M
Founders & team
Investors
Andreessen Horowitz, Insight Partners
Tech stack
CloudflareCloudflare Browser InsightsCore-JsDocusaurusEmotionGoogle Analytics
Funding & investor landscape
$9.7Btotal disclosed funding
110companies funded
320disclosed rounds
0rounds last 90 days
Most active investors
Y Combinator37 rounds
Accel13 rounds
New Enterprise Associates7 rounds
SV Angel7 rounds
Notable founders
Andy Konwinski
Co-Founder · Databricks
Arsalan Tavakoli-Shiraji
Co-Founder & SVP of Field Engineering · Databricks
Tim Glaser
Co-Founder & CTO · PostHog
James Hawkins
Co-Founder & CEO · PostHog
Zach Supalla
Co-Founder & CEO · Particle
Marco Palladino
Co-Founder & CTO · Kong
Augusto Marietti
CEO & President · Kong
Roman Shtylman
Co-Founder · Foxglove
Alex Chantavy
Co-Founder & CEO · SubImage
Zach Wasserman
Co-Founder · Fleet Device Management
Mike McNeil
CEO · Fleet Device Management
Stas Kelvich
Co-Founder · Neon
Prism market signals · United States · country-scoped Prism corpus, 12,053,801 docs
Market landscape — 10 sub-themes by coverage
Share of Open Source coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
Common questions
How many Open Source companies are there in San Francisco, United States?
Radar tracks 169 indexable Open Source companies headquartered in San Francisco, United States that meet our profile-completeness bar.
What is the total funding raised by Open Source companies in San Francisco, United States?
The Open Source companies in San Francisco, United States on this list have raised a combined $9.7B in disclosed equity funding across 110 funded companies.
Which is the highest-funded Open Source company in San Francisco, United States?
Databricks is the highest-funded Open Source company in San Francisco, United States, with $3.6B in disclosed equity funding.
How many Open Source companies in San Francisco, United States are funded?
110 of the 169 Open Source companies in San Francisco, United States on this list have disclosed at least one equity funding round.
How many Open Source unicorns are there in San Francisco, United States?
9 Open Source companies in San Francisco, United States on this list are valued at $1B or more.
Who are the top investors in San Francisco, United States Open Source companies?
The most active investors in San Francisco, United States Open Source companies on this list include Y Combinator, Accel, Andreessen Horowitz, Uncorrelated Ventures, DCVC.
Riya SenguptaFinancials
Riya reads income statements for fun. She covers the real money in a sector — revenue, growth, who actually earns — and never met a vague claim she didn't want a number for.