Best Software Testing Tools Companies in San Francisco, United States
The 131 best Software Testing Tools companies in San Francisco, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Sauce Labs.
Ranked: Best Software Testing Tools companies in San Francisco
| # | Company | Disclosed funding | Last round | Employees | Founder | Tech stack | Web popularity | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Sauce Labs Cloud based cross browser testing solutions provider | $228M | 28 mo ago | 243 243 → 342 (+41%) · sector median +22% | — | ContentfulSentryAtlassian Statuspage+42 | Top 1M | 39 patents Automated software testing tools with synthetic data generation and selector extraction. | 1 launch · 1 award |
| 2 | Sentry 🦄 Provider of application performance monitoring and error tracking software solutions | $217M | 49 mo ago | 232 232 → 453 (+95%) · sector median +22% | Chris Jennings Co-Founder | SentryZendeskApple iCloud Mail+21 | Top 500k | 22 patents Transformer rapid depressurization and explosion mitigation vent systems | 1 launch |
| 3 | Bugcrowd 🦄 Provider of crowdsourced security platform offering vulnerability disclosure and penetration testing | $184M | 19 mo ago | 131 | Casey Ellis Founder and Chief Strategy Officer | WordPressApple iCloud MailGoogle Workspace+44 | Top 500k | 15 patents AI-driven vulnerability prediction and crowdsourced bug de‑duplication for software security. | 1 job opening |
| 4 | Leanplum Mobile A/B testing, personalization & analytics platform | $172M | 75 mo ago | 45 | — | WordPressApple iCloud MailGoogle Workspace+35 | Top 5M | — | — |
| 5 | HackerOne AI powered security testing platform | $159M | 52 mo ago | 231 | Jobert Abma Co-Founder | DrupalMariaDBPHP+18 | Top 500k | — | 2 awards |
| 6 | Honeycomb Cloud based application performance monitoring platform | $150M | 38 mo ago | 141 141 → 291 (+106%) · sector median +22% | Edith Harbaugh Co-Founder & CEO | WordPressSentryApple iCloud Mail+47 | Top 500k | — | — |
| 7 | User Testing Provider of platform for gathering and analyzing user experience feedback | $148M | 67 mo ago | 557 | Alfonso Nuez Co-Founder | DrupalSentryPHP+28 | Top 50k | — | 1 award |
| 8 | Synack Platform offering security testing solution | $112M | 72 mo ago | 182 182 → 245 (+35%) · sector median +22% | Mark Kuhr Co-Founder & CTO | WordPressSentryMySQL+24 | Top 5M | 47 patents Automated, distributed application security testing and vulnerability discovery platforms | — |
| 9 | TestMu AI Provider of AI-powered cloud platform for software testing and quality engineering | $109M | 18 mo ago | — | Asad Khan Co-Founder & CEO | DiscourseRubyRuby on Rails+23 | Top 500k | — | 1 launch |
| 10 | Semgrep Platform offering code analysis and review solutions | $93M | 16 mo ago | 146 | Isaac Evans Co-Founder & CEO | SalesforceBootstrapAtlassian Statuspage+24 | Top 1M | — | 2 launchs |
| 11 | Horizon Three AI Cloud based pentesting platform 55Funding top 18%Tech top 29%Moat top 39%Product top 41% All 10 signals ▾Fundingtop 18% Techtop 29% Moattop 39% Producttop 41% Partnerstop 45% Markettop 50% Talentbottom 48% Growthbottom 47% Globalbottom 37% Newsbottom 31% Funding: Raised $83.5M across 6 rounds · 6 rounds over 6 yrs (1.0/yr) Tech: 48 technologies across 5/8 capability areas · Cloud: Amazon S3, Amazon Web Services rank vs industry peers · Fliar Intelligence Index 55/100 | $83M | 5 mo ago | 102 | Anthony Pillitiere Co-Founder Horizon3.ai | WordPressApple iCloud MailMySQL+34 | Top 5M | — | 1 partnership · 1 expansion |
| 12 | LambdaTest Cloud based cross browser testing software | $70M | 45 mo ago | 406 | Harish Sharma ex-Co-Founder | DiscourseRubyZoho+28 | Top 500k | — | — |
| 13 | Linear 🦄 Provider of a system to streamline issues, projects, and product roadmaps | $52M | 12 mo ago | 50 | Jori Lallo Co-Founder | SanitySentryApple iCloud Mail+24 | Top 50k | 216 patents Patents concentrated in electrical & electronics | 1 partnership |
| 14 | Eppo Developer of a platform for experimentation and feature management solutions | $51M | 25 mo ago | 20 20 → 20 (+0%) · sector median +22% | Chetan Sharma Founder & CEO | Webflow EcommerceWebflowSalesforce+25 | Top 5M | — | — |
| 15 | Apteligent Cloud based platform offering application performance monitoring solutions | $50M | 146 mo ago | 71 | — | — | — | 5 patents Mobile application performance monitoring and crash analytics across diverse devices | — |
| 16 | Tonic.ai AI-based solutions for creating safe, useful, de-identified data for QA, testing, and development. | $45M | 56 mo ago | 105 | Karl Hanson Co-Founder | WebflowApple iCloud MailGoogle Workspace+31 | Top 5M | — | 2 launchs |
| 17 | Rainforest QA QA as a service | $42M | 100 mo ago | 19 | Russell Smith Board member | WebflowApple iCloud MailGoogle Workspace+33 | Top 5M | 38 patents AI-driven automated software testing platforms with human-in-the-loop and visual inspection | — |
| 18 | Cobalt Provider of penetration testing as a service and offensive security | $37M | 70 mo ago | 465 | Jacob Hansen Co-Founder | HubSpot CMS HubSentryApple iCloud Mail+21 | Top 5M | 93 patents Microbial fermentation processes and genetic engineering for bioproduct production | — |
| 19 | Testim Web test automation solutions provider | $24M | 84 mo ago | 53 | — | Monaco EditorReactAmazon Web Services+26 | Top 1M | — | — |
| 20 | Evolv AI based AB testing platform | $23M | 31 mo ago | 31 31 → 21 (-32%) · sector median +22% | Michael Scharff Founder | HubSpot CMS HubApple iCloud MailGoogle Workspace+19 | Top 10M | 54 patents Advanced electronic vaporization systems for precise heating of viscous and solid substances. | — |
| 21 | Coverity Application security solutions for managing risk in software development lifecycle | $22M | 220 mo ago | 4,232 | — | RubyBootstrapRuby on Rails+17 | Top 5M | 27 patents Static code analysis tools for taint detection, test prioritization, and instrumentation | — |
| 22 | Wallarm API security platform delivering complete protection against attacks and abuse | $20M | 10 mo ago | 6 | Stepan Ilyin Co-Founder | WordPress Block EditorWordPressMySQL+31 | Top 5M | 10 patents AI-driven API security and L7 threat detection for firewalls and IDS | — |
| 23 | Functionize Cloud based platform offering software for automated testing | $19M | 10 mo ago | 125 | Tamas Cser Founder & CEO | WebflowSentryZendesk+24 | Top 5M | 34 patents AI-powered automated generation and analysis of software test cases | — |
| 24 | Test AI-powered mobile test automation tool | $19M | 64 mo ago | 21 | Jason Arbon Co-Founder & CEO | — | — | 11 patents Cleaning and thermal management solutions for semiconductor wire‑bonding and probe equipment | — |
| 25 | Palamida Software solutions for secure software development, license compliance, and monetization | $19M | 216 mo ago | 58 | — | — | — | 3 patents Software tools for code/file versioning, pattern search, and document similarity analysis. | — |
| 26 | Bugsnag Platform offering bug fixing software | $18M | 112 mo ago | 25 | — | WordPressMySQLPHP+32 | Top 500k | — | — |
| 27 | Moesif Provider of API testing and monitoring tools | $16M | 57 mo ago | 17 17 → 15 (-12%) · sector median +22% | Derric Gilling Co-founder & CEO | Azure Front DoorAzureReact+19 | Top 5M | 10 patents API usage analytics and management platform for monitoring, security, retention, and sampling. | — |
| 28 | Plutora Enterprise release management & testing environment management solutions provider | $14M | 113 mo ago | 33 | Dalibor Siroky CEO & Co-Founder | Framer SitesSalesforceReact+15 | Top 10M | — | — |
| 29 | Testsigma Provider of AI-powered platform for continuous software testing and automation | $13M | 24 mo ago | 124 | Vikram P Co-Founder | Node.jsZohoReact+32 | Top 500k | — | 1 award |
| 30 | SEWORKS AI based application security solutions provider | $10M | 114 mo ago | 12 | Min Hong CEO & Founder | — | — | — | — |
| 31 | Skyramp AI powered performance testing platform | $10M | 11 mo ago | 9 | Nithin Michael Co-Founder | Framer SitesApple iCloud MailGoogle Workspace+11 | Top 50M | 4 patents Automated testing frameworks for microservice architectures | — |
| 32 | Sofy Platform offering automated testing software | $10M | 46 mo ago | 53 | Syed Hamid Founder & CEO | WordPressMySQLPHP+16 | Top 10M | — | — |
| 33 | Ranger Cloud based test management software | $9M | 18 mo ago | — | Josh Ip Founder & CEO | WebflowMicrosoft AdvertisingGoogle Analytics+17 | Top 50M | — | — |
| 34 | Deductive AI AI powered software solutions to automate debugging and root-cause analysis of software issues | $8M | 7 mo ago | — | Sameer Agarwal Co-Founder & CTO | WebflowGSAPAmazon Web Services+14 | Top 50M | — | — |
| 35 | Replay Provider of screen recording, collaborating, and debugging tools for developers | $6M | 57 mo ago | 19 | Brian Hackett Co-Founder & Co-CEO | Node.jsRadix UITailwind CSS+24 | Top 5M | 46 patents Patents concentrated in chemistry & materials | — |
| 36 | Promptfoo Open-source tool to test AI applications | $5M | 11 mo ago | — | Ian W Co-Founder & CEO | DocusaurusReactKnockout.js+14 | Top 5M | — | — |
| 37 | GitStart Cloud based automated software testing platform | $5M | 49 mo ago | 145 | Hamza Zia Founder | Apple iCloud MailGoogle WorkspaceTailwind CSS+16 | Top 50M | — | — |
| 38 | TestRigor Platform offering software for automated regression testing for apps and websites | $5M | 57 mo ago | 72 | Enrique Biancato Co-Founder | WordPressMySQLPHP+23 | Top 1M | 3 patents Automated UI testing and error detection through screenshot analysis and element mapping | — |
| 39 | Pythagora AI powered automated testing tool | $4M | 25 mo ago | 2 | Senko Rasic Co-Founder | WebflowYouTubeAmazon Web Services+18 | Top 5M | — | — |
| 40 | Waypoint AI powered debugging software for developers | $3M | 11 mo ago | — | Jiri Dubansky Co-Founder | Node.jsHeadless UITailwind CSS+16 | Top 10M | — | 1 partnership |
| 41 | Zipy Technologies Provider of AI-driven session replay, error tracking, and analytics platform | $3M | 50 mo ago | 12 12 → 13 (+8%) · sector median +22% | Vishalini Paliwal Co-Founder & CEO | WebflowAmazon Web ServicesEmotion+22 | Top 5M | — | — |
| 42 | Cekura Provider of automated quality assurance platform for voice and chat agents | $2M | 11 mo ago | — | Sidhant Kabra Co-Founder | Cart FunctionalityNode.jsRadix UI+13 | Top 5M | — | — |
| 43 | HyperTest Platform offering API testing software | $2M | 42 mo ago | 13 | Karan Raina Co-Founder & CTO | Wix eCommerceWixSentry+28 | Top 10M | — | — |
| 44 | Revyl Provider of an AI-powered platform for mobile application end-to-end testing | $1M | 19 mo ago | — | Landseer Enga Co-Founder & CEO | — | — | — | 1 launch |
| 45 | KushoAI Provider of an AI-powered platform for software reliability and security | $600K | 27 mo ago | — | Sourabh Gawande Co-Founder & CTO | GhostNode.jsVarnish+19 | Top 10M | — | — |
| 46 | Canary Provider of AI-powered platform that automates software testing and quality assurance | $500K | 5 mo ago | — | Viswesh NG Co-Founder | — | — | — | — |
| 47 | Momentic AI-powered platform for end-to-end testing of web applications using natural language | $500K | 7 mo ago | — | Jeff An Co-Founder | WebflowVimeoAmazon Web Services+19 | Top 5M | — | — |
| 48 | Decipher AI powered bug fixing software | $500K | 24 mo ago | — | Michael Rosenfield Co-Founder | Framer SitesReactPostHog+11 | Top 50M | — | — |
| 49 | Tusk AI engineer that pushes and tests code | $500K | 29 mo ago | — | Sohil Kshirsagar Co-Founder & CTO | Node.jsHeadless UITailwind CSS+16 | Top 10M | — | — |
| 50 | Hamming Provider of artificial intelligence voice agents | $125K | 18 mo ago | — | Marius Buleandra Co-Founder & CTO | TurbopackNode.jsRadix UI+20 | Top 10M | — | — |
Top 12 Software Testing Tools companies in San Francisco
#1
Series D · San Francisco, California · founded 2019 · 102 employees$83.5Mraised▾
Cloud based pentesting platform. The features of the platform include configuration control, discovering and authorization of assets, vulnerability assessment, security posture analysis, and more. It also prioritizes vulnerabilities, performs audits, and identifies compromised data.
- Jan 2026Series D—
- May 2025Series D$100M
- Jul 2023Series C$40M
- Nov 2021Series B$35M
#2
Linear 🦄Series C · San Francisco, California · founded 2019 · 50 employees$52.2Mraised▾
Provider of a system to streamline issues, projects, and product roadmaps. It offers tools for planning, managing, and tracking product initiatives. The system consolidates specifications, milestones, tasks, and documentation in a centralized location. It facilitates collaboration across teams and departments, enabling progress tracking and workflow automation.
- Jun 2025Series C$82M
- Sep 2023Series B$35M
- Dec 2020Series A$13M
- Nov 2019Seed$4.2M
#3
Bugcrowd 🦄Series E · San Francisco, California · founded 2012 · 131 employees$183.7Mraised▾
Provider of crowdsourced security platform offering vulnerability disclosure and penetration testing. The platform facilitates vulnerability submissions from security researchers. It offers penetration testing as a service to meet compliance goals. Red team services simulate real-world threats to uncover risks.
- Nov 2024Conventional Debt$50M
- Feb 2024Series E$102M
- Mar 2020Series D$30M
- Mar 2018Series C$26M
#4
Series C · San Francisco, California · founded 2013 · 6 employees$20.1Mraised▾
API security platform delivering complete protection against attacks and abuse. It is a B2B SaaS company that provides a comprehensive solution for application and API security. The platform offers advanced API security, including API discovery, security testing, and abuse prevention. It helps organizations discover all APIs, detect and stop attacks, respond to incidents, and test APIs for security issues. It caters to various industries, including technology, healthcare, fintech, and e-commerce, and supports multiple cloud platforms like AWS, GCP, and Azure. The platform provides real-time API threat protection, AI agent security, and API SOC services. It offers features such as credential stuffing detection, API leak management, and cloud-native WAAP. The company focuses on protecting APIs and AI agents from threats, providing visibility, automated response, and integrations.
- Jul 2025Series C$55M
- Sep 2023Series A$9.2M
- Oct 2018Series A$8M
- Dec 2016Series A$2.3M
#5
Series B · San Francisco, California · founded 2014 · 125 employees$19.2Mraised▾
Cloud based platform offering software for automated testing. The platform allows web users to record and run functionality test cases by just pointing and clicking. Users can schedule and run tests on different browsers. Members can capture mobile website workflows in a browser environment and run tests on the cloud to ensure that the site runs properly on the web and mobile. Provides a dashboard to measure and check the load and performance of the website. Provides integration for GitHub, circle ci, Heroku, Jenkins and Jira.
- Aug 2025Series B$41M
- Jul 2021Series A—
- Mar 2019Series A$16M
- Feb 2018Seed$2.5M
#6
Series D · San Francisco, California · founded 2017 · 146 employees$93Mraised▾
Platform offering code analysis and review solutions. It leverages AI that analyzes the code and identifies bugs and vulnerabilities. The platform analyzes code in the commit, editor, and CI pipeline. It supports programming languages such as Java, python, and more.
- Feb 2025Series D$100M
- Apr 2023Series C$53M
- Jul 2021Series B$27M
- Oct 2020Series A$13M
#7
Series D · San Francisco, California · founded 2018$108.7Mraised▾
Provider of AI-powered cloud platform for software testing and quality engineering. The platform offers tools for test creation, authoring, orchestration, and insight generation. It supports agent-to-agent testing, auto-healing, visual testing, and root cause analysis. The platform provides capabilities for cross-browser testing, real device testing, and automation testing. It facilitates accessibility testing, performance testing, and API testing.
- Dec 2024Series D$38M
- Sep 2022Grant (prize money)$250K
- Mar 2022Series C$45M
- Jun 2021Series B$16M
#8
Seed · San Francisco, California · founded 2019$7.5Mraised▾
AI powered software solutions to automate debugging and root-cause analysis of software issues. It mitigates software outages by leveraging artificial intelligence to understand codebases and telemetry data, including metrics and events. It offers distributed systems for identifying issues, and employs a microservice-based architecture to facilitate its operations.
- Nov 2025Seed$7.5M
#9
Seed · San Francisco, California · founded 2022 · 9 employees$10Mraised▾
AI powered performance testing platform. Its AI generates functional and performance tests in real time. The platform integrates with CI and CD pipelines to streamline the testing process. It enables developers to choose the criteria to test the application.
- Jun 2025Seed$10M
#10
Acquired · San Francisco, California · founded 2023$5.2Mraised▾
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.
- Jul 2025Series A$18.4M
- Jun 2024Seed$5.2M
#11
Series G · San Francisco, California · founded 2008 · 243 employees$227.7Mraised▾
Sauce Labs is a cloud based cross browser testing solutions provider. The product offered by the company is a cloud-based test platform that provides automated and continuous testing for web & mobile apps. The features of the product include analytics & integrations, continuous, automated, and live testing. The clients of the company are Splunk, VISA, Walmart, Zillow, etc.
- Jan 2024Series G$79.9M
- Jun 2022Series F—
- Mar 2021Series F—
- 2019Series F—
#12
Seed · San Francisco, California · founded 2026$500Kraised▾
Provider of AI-powered platform that automates software testing and quality assurance. The platform analyzes code changes, generates tests, runs them in browsers, and reports results. It provides status reports, test results, and video recordings of failures. The platform allows users to trigger specific tests from pull request comments. It aims to help developers, quality assurance engineers, and product managers create bug-free products.
- Jan 2026Seed$500K
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Software Testing Tools coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
Common questions
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.