Best Software Testing Tools Companies in United States
The 591 best Software Testing Tools companies in United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Snyk.
The 591 Software Testing Tools companies tracked in the United States have pulled in $8.1 billion in disclosed funding, and that number alone tells you this isn't a niche market anymore. Eight unicorns have emerged from the field. Xbow leads the funding table at $251 million, followed by Pentera at $189 million and Bugcrowd at $184 million — three companies whose capital raises reflect genuine institutional conviction, not speculative seed rounds. Y Combinator, Insight Partners, and Accel are the most active backers, which I'd note signals the sector has cleared the credibility threshold that attracts repeat institutional money.
So what's driving the momentum? Automation-first strategies are reshaping how engineering teams think about coverage, and hot verticals inside the category now include audio rendering, playback engines, and admissions testing pipelines. Coverage depth is rising across the board. Horizon Three AI ($83 million) and Antithesis ($47 million) round out the upper tier, and if you're evaluating where capital is concentrating, the answer is clear: security-adjacent testing and AI-driven validation are where the biggest checks are landing. The directory below ranks these companies by disclosed equity funding and recent funding momentum, giving you a clean read on who's actually capitalized versus who's still pitching.
Ranked: Best Software Testing Tools companies in United States
| # | Company | Disclosed funding | Last round | Employees | Tech stack | Web popularity | Market signals (1y) | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Snyk 🦄 Provider of a platform securing code, models, and agents in applications | $1.3B | 26 mo ago | 1,138 | SentryApple iCloud MailGoogle Workspace+30 | Top 500k | 4 signals ▲33% Leadership · Contracts | — | — |
| 2 | Invicti Provider of web application and API security testing and management | $665M | 55 mo ago | 323 | WordPressApple iCloud MailGoogle Workspace+31 | Top 1M | — | — | 1 partnership |
| 3 | Cyara Omnichannel customer experience testing platform | $375M | 52 mo ago | 94 | WordPress Block EditorWordPressMySQL+37 | Top 5M | 5 signals ▼62% New product · Leadership | 20 patents Automated testing tools for multi-channel contact‑center communications (voice, SMS, IVR). | — |
| 4 | Copado 🦄 Provider of DevOps platform for Salesforce releases, testing, and compliance | $329M | 57 mo ago | 700 | WebflowSentryAtlassian Statuspage+28 | Top 1M | 4 signals ▲33% Leadership | 12 patents DevOps pipeline analytics and value‑stream management for software development and delivery | 1 launch |
| 5 | XBOW AI-powered autonomous penetration testing platform 69Funding top 12%Growth top 35%Moat top 40%Tech top 42% All 8 signals ▾Fundingtop 12% Growthtop 35% Moattop 40% Techtop 42% AItop 45% Talenttop 45% Globalbottom 48% Marketbottom 44% Funding: Raised $251M across 5 rounds · 5 rounds over 2 yrs (2.5/yr) Growth: Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 69/100 | $251M | 1 mo ago | 40 | WebflowApple iCloud MailSalesforce+16 | Top 5M | — | — | — |
| 6 | Sauce Labs Cloud based cross browser testing solutions provider | $228M | 28 mo ago | 243 243 → 342 (+41%) | ContentfulSentryAtlassian Statuspage+42 | Top 1M | — | 39 patents Automated software testing tools with synthetic data generation and selector extraction. | 1 launch · 1 award |
| 7 | Sentry 🦄 Provider of application performance monitoring and error tracking software solutions | $217M | 49 mo ago | 232 232 → 453 (+95%) | SentryZendeskApple iCloud Mail+21 | Top 500k | — | 22 patents Transformer rapid depressurization and explosion mitigation vent systems | 1 launch |
| 8 | Pentera 🦄 Cloud based penetration testing solutions provider | $189M | 15 mo ago | 350 | WordPressSentryZendesk+43 | Top 5M | 3 signals ▼40% M&A · Leadership | — | 2 launchs |
| 9 | Bugcrowd 🦄 Provider of crowdsourced security platform offering vulnerability disclosure and penetration testing | $184M | 19 mo ago | 131 | WordPressApple iCloud MailGoogle Workspace+44 | Top 500k | 3 signals ▼57% M&A · Leadership | 15 patents AI-driven vulnerability prediction and crowdsourced bug de‑duplication for software security. | 1 job opening |
| 10 | Tricentis 🦄 AI powered software testing suite | $174M | 18 mo ago | 51 | WordPressAlgoliaMySQL+31 | Top 500k | — | — | 1 launch · 1 partnership |
| 11 | Leanplum Mobile A/B testing, personalization & analytics platform | $172M | 75 mo ago | 45 | WordPressApple iCloud MailGoogle Workspace+35 | Top 5M | — | — | — |
| 12 | HackerOne AI powered security testing platform | $159M | 52 mo ago | 231 | DrupalMariaDBPHP+18 | Top 500k | — | — | 2 awards |
| 13 | Honeycomb Cloud based application performance monitoring platform | $150M | 38 mo ago | 141 141 → 291 (+106%) | WordPressSentryApple iCloud Mail+47 | Top 500k | — | — | — |
| 14 | User Testing Provider of platform for gathering and analyzing user experience feedback | $148M | 67 mo ago | 557 | DrupalSentryPHP+28 | Top 50k | 3 signals ▼40% Leadership · New product | — | 1 award |
| 15 | Headspin 🦄 Provider of automated and manual testing platform for mobile and web | $117M | 38 mo ago | 80 | WebflowSentryWistia+21 | Top 5M | — | 33 patents Mobile device testing, remote app signing, and secure data exchange platforms | — |
| 16 | TestMu AI Provider of AI-powered cloud platform for software testing and quality engineering | $109M | 18 mo ago | — | DiscourseRubyRuby on Rails+23 | Top 500k | — | — | 1 launch |
| 17 | Semgrep Platform offering code analysis and review solutions | $93M | 16 mo ago | 146 | SalesforceBootstrapAtlassian Statuspage+24 | Top 1M | — | — | 2 launchs |
| 18 | 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 | WordPressApple iCloud MailMySQL+34 | Top 5M | — | — | 1 partnership · 1 expansion |
| 19 | LambdaTest Cloud based cross browser testing software | $70M | 45 mo ago | 406 | DiscourseRubyZoho+28 | Top 500k | — | — | — |
| 20 | Opkey Provider of AI-powered test automation platform for enterprise resource planning | $59M | 21 mo ago | 51 | WebflowAmazon Web ServicesSplide+28 | Top 5M | — | — | — |
| 21 | Evinced Developer of AI-powered tools for website and mobile app accessibility | $57M | 18 mo ago | 15 | SentryZendeskNode.js+22 | Top 10M | — | — | — |
| 22 | QA Wolf Provider of hybrid automated platform for software testing tools | $56M | 22 mo ago | 45 | WebflowApple iCloud MailGoogle Workspace+34 | Top 5M | — | — | 1 award |
| 23 | Instabug Provider of agentic mobile observability platform for application performance management | $54M | 49 mo ago | 191 | ReadMeAlgoliaSalesforce+26 | Top 1M | — | — | 1 launch |
| 24 | Statsig Cloud based AB testing and feature management platform | $53M | 13 mo ago | 66 | Apple iCloud MailMicrosoft 365Node.js+23 | Top 500k | 6 signals ▲20% M&A · Capital raise | — | — |
| 25 | Linear 🦄 Provider of a system to streamline issues, projects, and product roadmaps | $52M | 12 mo ago | 50 | SanitySentryApple iCloud Mail+24 | Top 50k | 12 signals ▲140% Contracts · Regulatory · Acquisition | 216 patents Patents concentrated in electrical & electronics | 1 partnership |
| 26 | Eppo Developer of a platform for experimentation and feature management solutions | $51M | 25 mo ago | 20 20 → 20 (+0%) | Webflow EcommerceWebflowSalesforce+25 | Top 5M | — | — | — |
| 27 | Antithesis Provider of autonomous software testing platform for bug detection and reproduction | $47M | 6 mo ago | 33 | SalesforceAmazon Web ServicesCloudflare+20 | Top 5M | 4 signals ▲100% Funding | — | 1 job opening |
| 28 | Kobiton AI powered automated mobile testing solutions | $40M | 22 mo ago | 113 | WordPress Block EditorWordPressMySQL+31 | Top 5M | — | — | — |
| 29 | Mayhem Automated code and API security testing tool | $38M | 25 mo ago | 49 | WebflowSalesforceAmazon Web Services+25 | Top 10M | — | — | — |
| 30 | StackHawk Cloud based security testing software | $35M | 12 mo ago | 50 | JekyllApple iCloud MailGoogle Workspace+20 | Top 5M | — | — | 1 partnership |
| 31 | Bright Security Platform offering security testing software | $25M | 12 mo ago | 135 | WordPressApple iCloud MailMySQL+26 | Top 5M | — | — | — |
| 32 | Evolv AI based AB testing platform | $23M | 31 mo ago | 31 31 → 21 (-32%) | HubSpot CMS HubApple iCloud MailGoogle Workspace+19 | Top 10M | — | 54 patents Advanced electronic vaporization systems for precise heating of viscous and solid substances. | — |
| 33 | Wallarm API security platform delivering complete protection against attacks and abuse | $20M | 10 mo ago | 6 | WordPress Block EditorWordPressMySQL+31 | Top 5M | 5 signals ▲400% Leadership · Funding | 10 patents AI-driven API security and L7 threat detection for firewalls and IDS | — |
| 34 | Functionize Cloud based platform offering software for automated testing | $19M | 9 mo ago | 125 | WebflowSentryZendesk+24 | Top 5M | — | 34 patents AI-powered automated generation and analysis of software test cases | — |
| 35 | Testsigma Provider of AI-powered platform for continuous software testing and automation | $13M | 24 mo ago | 124 | Node.jsZohoReact+32 | Top 500k | — | — | 1 award |
| 36 | Jam Provider of a bug reporting tool | $12M | 28 mo ago | 18 18 → 17 (-6%) | TurbopackInstatusApple iCloud Mail+22 | Top 500k | — | — | 1 launch |
| 37 | Skyramp AI powered performance testing platform | $10M | 11 mo ago | 9 | Framer SitesApple iCloud MailGoogle Workspace+11 | Top 50M | — | 4 patents Automated testing frameworks for microservice architectures | — |
| 38 | Ranger Cloud based test management software | $9M | 18 mo ago | — | WebflowMicrosoft AdvertisingGoogle Analytics+17 | Top 50M | — | — | — |
| 39 | Testkube Platform offering kubernetes testing frameworks | $8M | 8 mo ago | — | WebflowSentryGSAP+22 | Top 5M | — | — | — |
| 40 | Deductive AI AI powered software solutions to automate debugging and root-cause analysis of software issues | $8M | 7 mo ago | — | WebflowGSAPAmazon Web Services+14 | Top 50M | — | — | — |
| 41 | NightVision Platform offering security testing software | $5M | 14 mo ago | — | WebflowFreshworks CRMreCAPTCHA+10 | Top 50M | — | — | — |
| 42 | Promptfoo Open-source tool to test AI applications | $5M | 11 mo ago | — | DocusaurusReactKnockout.js+14 | Top 5M | 5 signals ▲150% M&A · Funding · Capital raise | — | — |
| 43 | TestParty Provider of AI automation software for writing ADA compliant software | $4M | 23 mo ago | — | DatoCMSNode.jsRadix UI+23 | Top 10M | — | — | — |
| 44 | Waypoint AI powered debugging software for developers | $3M | 11 mo ago | — | Node.jsHeadless UITailwind CSS+16 | Top 10M | — | — | 1 partnership |
| 45 | MuukTest Platform offering automated testing software | $3M | 10 mo ago | 24 | HubSpot CMS HubAmazon Web ServicesGSAP+24 | Top 5M | — | — | — |
| 46 | Cekura Provider of automated quality assurance platform for voice and chat agents | $2M | 11 mo ago | — | Cart FunctionalityNode.jsRadix UI+13 | Top 5M | — | — | — |
| 47 | BotGauge Provider of autonomous quality assurance solutions using AI and human validation | $2M | 15 mo ago | — | Apple iCloud MailGoogle WorkspaceNode.js+24 | Top 10M | — | — | — |
| 48 | Testaify AI based testing platform for enterprises | $650K | 12 mo ago | — | — | — | — | — | — |
| 49 | Canary Provider of AI-powered platform that automates software testing and quality assurance | $500K | 5 mo ago | — | — | — | — | — | — |
| 50 | Momentic AI-powered platform for end-to-end testing of web applications using natural language | $500K | 7 mo ago | — | WebflowVimeoAmazon Web Services+19 | Top 5M | — | — | — |
Top 12 Software Testing Tools companies in United States
#1
Series C · Seattle, Washington · founded 2024 · 40 employees$251.1Mraised▾
AI-powered autonomous penetration testing platform. The platform identifies and exploits vulnerabilities in web applications. It uses AI to execute commands, analyze outputs, and refine its approach without human intervention. It allows users to discover and exploit vulnerabilities, representing a significant advancement in protecting software and infrastructure from cyber threats.
- May 2026Series C$35M
- Mar 2026Series C$120.9M
- Jun 2025Series B$75M
- Jul 2024Seed$20M
#2
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
#3
Series A · Vienna, Virginia · founded 2018 · 33 employees$47Mraised▾
Provider of autonomous software testing platform for bug detection and reproduction. This platform offers deterministic testing, enabling perfect reproducibility of found bugs, regardless of complexity. It explores software in novel ways, uncovering "unknown unknowns" not found through traditional testing methods. The platform facilitates easier debugging by providing a deterministic environment for analysis and reproduction of error paths. It also allows for continuous testing of new software versions, leading to quicker bug identification and resolution. This reduces time spent on manual testing and improves overall software quality and release cycles.
- Dec 2025Series A$105M
- Feb 2025Series A$30M
- Feb 2024Seed$47M
#4
Pentera 🦄Series D · Burlington, Massachusetts · founded 2015 · 350 employees$189.2Mraised▾
Cloud based penetration testing solutions provider. It is an automated security validation platform that helps to improve cybersecurity. It scans, discovers, and remediates the most critical vulnerabilities posing the highest risk. It provides actionable insight for companies to continue to test and improve their cybersecurity posture.
- Mar 2025Series D$60M
- Jan 2022Series C$150M
- Sep 2020Series B$25M
- Nov 2019Series A$10M
#5
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
#6
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
#7
Snyk 🦄Series G · Boston, Massachusetts · founded 2015 · 1138 employees$1.3Braised▾
Provider of a platform securing code, models, and agents in applications. The platform offers tools for application security, software supply chain security, and fixing vulnerabilities. It provides resources such as a vulnerability database, security education, and documentation. The platform helps organizations secure development, reduce business risk, and accelerate software delivery.
- Apr 2024Series G$25M
- Jan 2023Series G$25M
- Dec 2022Series G$196.5M
- Mar 2022Series F$4.8M
#8
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
#9
Series B · Austin, Texas · founded 2007 · 51 employees$174Mraised▾
AI powered software testing suite. It offers functional and automated testing for mobile and web applications. It helps in the testing of applications, business processes, and data. It integrates with tools across the delivery pipeline. The platform offering includes performance testing, test automation, test management, test analysis, and more.
- Nov 2024PE$1.3B
- Aug 2017Series B—
- Jan 2017Series B$165M
- Jul 2016Series B—
#10
Series B · Denver, Colorado · founded 2019 · 50 employees$35.3Mraised▾
Cloud based security testing software. It allows users to test the APIs, applications, and services for security vulnerabilities. It runs the security testing in the CI or CD pipelines to identify vulnerabilities in the pipeline. The features include graphql testing, grpc testing, and more.
- May 2025Series B$12M
- Sep 2022Series B$29.6K
- May 2022Series B$20.7M
- Oct 2020Series A$10M
#11
Acquired · Kirkland, Washington · founded 2021 · 66 employees$53.4Mraised▾
Cloud based AB testing and feature management platform. It runs AB tests for feature gate that allows to validate the features impact on customer behavior and application usage. It runs AB tests on multiple devices and supports different application stack. It provides solutions to manage the release process by testing, and launching new features. The platform monitors the release performance to identify bugs in real time.
- May 2025Series C$100M
- Apr 2022Series B$43M
- Aug 2021Series A$10.4M
#12
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
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.