June 26, 2026
by Devyani Mehta / June 26, 2026
I evaluated 10+ tools on G2 to find the five best penetration testing tools of 2026. These are Cobalt, vPenTest, Astra Pentest, Oneleet, and HackerOne Platform.
As a technical writer focused on cybersecurity tools, I have spent the past year gaining a deeper understanding of how security experts identify vulnerabilities, assess potential threats, and prevent breaches in complex systems. My curiosity led me to explore the best penetration testing tools. These tools allow cybersecurity professionals to simulate real-world attacks, assess vulnerabilities in networks, applications, and other critical systems, and ultimately identify weaknesses before they can be exploited. By providing actionable insights, these tools help security experts patch vulnerabilities, fortify defenses, and stay one step ahead of potential threats.
vPenTest: Best for automated and manual cloud-based penetration testing
Delivers quick results through a hybrid of automation and manual testing, ideal for organizations needing scalable security assessments. (pricing available upon request)
* These penetration testing tools are top-rated in their category, according to G2's Summer 2026 Grid Report. Pricing for these products is available upon request, except for Astra Pentest.
Penetration testing tools are essential for cybersecurity professionals to evaluate the security of systems and networks. These tools help simulate attacks to identify vulnerabilities before they can be exploited by malicious actors. They allow testers to scan for weaknesses in various areas, including network configurations, web applications, and system software.
The value shows up fast; the penetration testing market is projected to reach $4.39 billion by 2031 from $1.98 billion in 2025, at a CAGR of 14.2% during the forecast period.
I extensively evaluated the leading penetration testing tools to assess their effectiveness in identifying vulnerabilities, securing systems, and assessing their ability to protect against potential threats. To deepen my understanding, I also consulted with cybersecurity professionals to learn about their needs and challenges in penetration testing.
I used AI to analyze user feedback and reviews on G2 and G2’s Grid Reports to gather insights into each tool’s features, usability, and overall value. By combining expert feedback and user reviews, I’ve compiled a list of the best penetration testing tools to help you choose the right one for your security needs.
The screenshots featured in this article may include both those captured during testing and those obtained from the vendor's G2 page.
When evaluating the best penetration testing tools, I focused on a few key factors to evaluate how well they address the complex needs of cybersecurity professionals:
The list below contains genuine user reviews from our best Penetration Testing Tools category page. To qualify for inclusion in the category, a product must:
This data was pulled from G2 in 2026. Some reviews have been edited for clarity.
While evaluating G2 reviews of Cobalt, the attack vectors really stood out to me. The variety of attack simulations provides a comprehensive view of potential threats and covers a broad range of possible attack scenarios, which is invaluable for understanding where vulnerabilities may lie.
In addition, the easy-to-follow checklist for setting up and completing penetration tests was an excellent feature. For a beginner, it not only helped streamline the process but also ensured that no step was overlooked. This step-by-step guidance made it easier to conduct thorough tests without feeling overwhelmed by the complexity of the task. This is reflected in the G2 score, where Cobalt earns 93% for ease of use and 92% for ease of set up.
Cobalt allows you to conduct both dynamic application security testing (DAST) and attack surface scanning, which I found to be an excellent combination. Its vulnerability scanning feature is especially well-regarded. According to G2 Data, 89% of users praised its ability to scan applications and networks for known vulnerabilities, holes, and exploits.

Reporting customization may need additional context for deeper stakeholder reviews. While Cobalt provides useful findings and dashboards, some G2 users mention that reporting visuals and customization options may not always meet highly specific executive or management presentation needs. That said, the platform still helps teams centralize pentest results and communicate key security insights in a structured way.
With a 4.5-star rating across hundreds of reviews, Cobalt consistently earns praise for fast test launches, real-time collaboration, and actionable findings that fit the pace of modern development teams.
"Cobalt provides practical, real‑world pentesting with actionable findings that are easy for engineers to understand and fix. The ability to interact with testers and quickly validate remediations makes security feel collaborative rather than audit‑driven. It fits well into modern development workflows without adding unnecessary friction."
- Cobalt review, Arpit G.
"I would say that the reporting and the interface of the reports could be better, which is difficult internally. Since we added some findings, I needed to explain really deeply to the management about the findings and their impact."
- Cobalt review, Osher L.
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One of the most significant technical advantages of vPenTest is its ability to set up automated network penetration tests. With the test scheduling functionality, I could evaluate tests to run at specific times, which ensures that teams are always ahead of potential risks. It saves a lot of time and reduces the chances of missing vulnerabilities that might otherwise go undetected using traditional manual testing methods. According to G2 Data, 92% users are satisfied with vPenTest's test automation features.
Additionally, I noted in G2 reviews that vPenTest offers flexibility in customizing penetration tests. I could evaluate focus tests on specific areas, devices, or systems. This ability can make the tool adaptable to different environments and security needs. Testing is targeted this way and helps uncover vulnerabilities that are most relevant to an organization’s infrastructure.
The user interface is another highlight. Setting up tests, managing resources, and accessing results were easy, as mentioned in G2 reviews . The platform is designed to simplify complex security assessments without getting bogged down by unnecessary features. In fact, according to G2 Data, 72% of small businesses opt for vPenTest, proving its popularity among growing companies.
While vPentesting offers a streamlined way to run security testing, teams with highly complex environments or broader assessment needs may find the scope less flexible than a fully customized engagement. That said, it remains a strong option for organizations looking for efficient, repeatable, and focused penetration testing coverage.
Overall, vPenTest is a strong fit for teams that want a practical, easy-to-use penetration testing platform with automation, customization, and clear results. It is especially well suited for growing businesses looking to strengthen their security posture without adding unnecessary complexity.
"vPenTest has been useful for quickly identifying externally exposed weaknesses without requiring a lengthy manual assessment process for every engagement. The automated testing workflow helps provide a practical baseline view of network exposure, insecure services, and common attack paths while still producing reports that are understandable for both technical teams and customer discussions. We also like that it helps prioritize remediation efforts by surfacing issues that are realistically exploitable rather than simply generating overly broad vulnerability lists. The platform integrates well into recurring security review processes and makes it easier to maintain more consistent testing across multiple environments."
- vPenTest review, Darren.
"The testing feels limited in depth and is mostly automated, which leads to false positives. There’s no real manual testing, and the overall scope feels constrained. It also lacks customization options, the analytics are fairly basic, and exploit validation is limited. Overall, it feels less advanced than an expert-led pentest."
- vPenTest review, Erik J.
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One of the first things that stood out to me while evaluating Astra Pentest was the automated vulnerability scanner. With insights from over 5000+ real-world pentests, the tool covers many security issues, giving me confidence that it wasn’t missing any significant vulnerabilities. The sheer number of tests made it clear that Astra Pentest is designed to provide a thorough evaluation, which I appreciated. It scanned for everything from Denial of service (DoS) attacks to cryptojacking attacks, among other common risks.
I also found several G2 reviewers mention the Astra Pentest Dashboard to be an excellent feature. It offered a smooth and intuitive experience that made it easy to track the progress of tests. They could view the results, and the dashboard broke down the vulnerabilities by category, which can help security teams prioritize which issues need immediate attention. In fact, according to G2 Data, 92% of users praised the tool for its performance and reliability.
Another feature I liked was the progressive web app (PWA) that allowed access to the Astra Pentest dashboard on a mobile device. This was particularly useful when teams were away from the desk but still needed to check the status of ongoing tests or review the results.

While Astra Pentest is valued for its security testing capabilities, some G2 users mention that customer support response times can vary depending on the issue. That said, the platform still offers a practical way for teams to identify vulnerabilities, manage remediation, and strengthen their overall security posture.
Overall, Astra Pentest is a strong choice for teams that want broad vulnerability coverage, clear dashboards, and flexible access across devices. It is especially useful for web and e-commerce businesses looking to simplify security testing while staying proactive about risk.
"What I like best about Astra Pentest is the combination of thorough security testing and a user-friendly platform. The reports are clear, actionable, and prioritized based on risk, which makes remediation more efficient. The team is responsive, knowledgeable, and willing to provide clarification when needed. I also appreciate the continuous visibility into vulnerabilities and the structured approach to tracking and validating fixes throughout the engagement."
- Astra Pentest review, Sevesh A.
"At times, we needed extra back-and-forth to align on whether a retest was targeting the originally reported endpoint versus a new surface. So, we’d value slightly clearer guidance on when an observation should be treated as a reopened finding vs. a new finding."
- Astra Pentest review, Misha O.
Use the best threat intelligence software to monitor, detect, and respond to potential security risks.
One of the first things that stood out to me while evaluating Oneleet was how it approaches compliance differently from most platforms. Rather than treating SOC 2 and ISO 27001 as box-ticking exercises, Oneleet builds genuine security first and lets certification follow as a natural outcome.
I also found G2 reviewers consistently highlight the vCISO support as a standout feature. Unlike platforms that hand you a portal and wish you luck, Oneleet pairs every customer with a dedicated security program manager who guides them through the process, answers questions on Slack in real time, and, in many cases, joins sales calls directly to help close enterprise deals that require security validation. Oneleet receives a 100% satisfaction score on G2 for its quality of support.
Another feature that impressed me was the platform's automated evidence collection through deep integrations with tools like AWS, GitHub, Google Workspace, and Cloudflare. These integrations continuously gather the evidence needed for audits, removing the manual screenshot-and-upload burden that slows down most compliance programs. Pair that with the AI-powered security questionnaire tool, and teams can respond to vendor security reviews in a fraction of the time they previously needed.

While Oneleet is built to simplify security and compliance workflows, some teams may need time to adjust to its approach if they are used to more traditional audit or pentesting processes. That said, its security-first model can be especially useful for organizations that want stronger guidance, clearer remediation, and a more connected path to audit readiness.
Based on my evaluation, Oneleet is a strong choice for growth-stage companies and SMBs that need to achieve compliance certifications quickly, without sacrificing real security, and want expert guidance throughout, rather than a self-serve tool they have to figure out alone.
"Oneleet helped make the SOC 2 process feel practical instead of overly audit-driven. Their policies and controls are organized in a way that maps cleanly to real operational and security work, which made it much easier to understand what actually mattered and why. The platform guidance around controls and evidence collection has been especially helpful for planning ahead for auditor expectations rather than reacting late in the process. I also appreciated that they don’t feel like a black box. Their API and automation support made it easy for us to integrate evidence collection into our own workflows and internal systems. At the same time, the dashboard itself is intuitive and saves a lot of manual effort through built-in automated checks and evidence gathering."
- Oneleet review, Verified User in Computer Software.
"We would like the Trust Center to support multiple languages, but this a minor improvement. Overall, it has been great working with them"
- Oneleet review, Olivia B.
Penetration tests uncover vulnerabilities, but keeping systems secure requires timely updates. Explore the best patch management software reviewed by my colleague.
While evaluating HackerOne Platform, I could not help but notice the sheer scale and caliber of its researcher community. With one of the world's largest pool of vetted security researchers, HackerOne gives organizations access to diverse hacking talent that would be impossible to replicate internally. This global reach is especially valuable for multinational companies that need security coverage across different regions, languages, and threat landscapes.
I also found that G2 reviewers consistently highlight the platform's managed triage service as a major time-saver. Rather than fielding raw researcher submissions directly, organizations benefit from HackerOne's triage team performing the initial validation, filtering out noise, and delivering structured, actionable reports ready for remediation. This reduces the burden on internal security teams significantly. 91% G2 users are likely to recommend this penetration testing tool.
Another feature I appreciated was the platform's integrations with tools like Jira and Slack, along with its extensive API capabilities. These connections make it straightforward to pull vulnerability data into existing workflows and business intelligence tools, keeping security findings visible across engineering and leadership without requiring manual exports or context switching.
The recently introduced HAI (AI copilot) adds further efficiency by automatically summarizing incoming reports, helping program managers stay on top of large submission volumes without spending hours on manual reading.

While HackerOne is highly valued for its skilled hacker community, some G2 users note that triage response times can vary, especially for complex or product-specific vulnerabilities that require deeper system context. That said, the platform remains a strong fit for organizations looking to access broad security expertise and manage vulnerability discovery at scale.
Overall, HackerOne Platform is a strong choice for mid-market and enterprise security teams that want to run structured bug bounty programs, tap into world-class researcher talent, and manage vulnerability disclosure at scale. It is especially well-suited for organizations that need a credible, globally recognized program to attract top researchers and demonstrate security maturity to customers and leadership.
"I love the quality of the researcher community on the HackerOne Platform. The reports we receive are usually well written and reproducible, which makes our job way easier. It really helps us scale our security testing by allowing external researchers to find issues like IDORs, SSRFs, and logic flaws, which is huge. The triage and payout flow saves us a lot of time. Additionally, their team helped with the smooth setup by scoping the program and defining policy."
- HackerOne Platform review, Mikhail Y.
"Triage can be slow and painful, or make mistakes because they don't know the product as well as company employees. The premiums to run on the platform can be quite high, especially relative to professional services hours actually given or triage times."
- HackerOne Platform review, E B.
Got more questions? G2 has the answers.
Cobalt, Oneleet, and HackerOne Platform consistently earn the highest trust scores on G2 from security professionals. Cobalt and Oneleet lead on finding quality and researcher credibility, while HackerOne dominates at the enterprise level.
Cobalt and Oneleet are the top picks among CISOs, with Cobalt praised for clear upward reporting and Oneleet valued for its dedicated vCISO support. HackerOne Platform is also widely referenced by enterprise security leaders as part of their continuous vulnerability management strategy.
Astra Pentest combines automated and manual testing to dramatically cut time-to-results. HackerOne Platform adds speed through simultaneous multi-researcher coverage rather than sequential testing.
Oneleet is founded by offensive security professionals, and Cobalt's vetted researcher network ensures human-verified findings. HackerOne Platform adds further independent validation through its globally distributed researcher community.
Cobalt and Oneleet are most frequently cited for finding accuracy, with G2 reviewers consistently noting proof-of-concept steps and real business impact rather than theoretical scanner output. HackerOne Platform's researcher-submitted reports are similarly praised as well-written, reproducible, and immediately actionable.
Astra Pentest is purpose-built for web and eCommerce environments where uptime is critical, with testing designed to avoid impacting live traffic. Cobalt's scoping process and managed triage layer ensure internal teams aren't flooded with unvalidated noise during an engagement.
Astra Pentest and Cobalt both structure findings by severity with clear remediation guidance so teams know exactly what to fix first. Oneleet goes further by pairing each finding with effort estimates, making it easier to plan sprints around security work.
Cobalt and Oneleet both generate tiered reports from a single engagement, executive summaries for leadership, and detailed technical findings for engineers. Astra Pentest also offers multiple report formats that users find useful when presenting results to clients or non-technical stakeholders.
Cobalt and HackerOne Platform both use human-first validation models, meaning findings are researcher-confirmed before reaching internal teams. Oneleet keeps false positive rates low through expert oversight at every stage, while Astra Pentest's scanner is tuned specifically to reduce tool-generated noise.
Astra Pentest receives praise for developer-friendly remediation instructions that reduce back-and-forth between security and engineering. Cobalt allows direct follow-up with the pentester who found the issue, while Oneleet explains both the fix and the reasoning behind each control.
I've experienced firsthand how, without penetration testing tools, much of the analysis becomes manual, leading to missed vulnerabilities. Threat detection is reactive rather than proactive. The absence of real-time reporting further complicates matters. These challenges have underscored the fact that effective security tools are not simply a convenience—they are essential for robust security.
Each penetration testing tool I’ve explored offers distinct strengths, whether it's vulnerability scanning, threat detection, or real-time reporting. From automated scanners that save time and reduce errors to advanced detection systems that offer deep, actionable insights, these tools equip cybersecurity professionals with the capabilities needed to stay ahead of ever-evolving threats.
By carefully selecting the right tools for the job, professionals can ensure a proactive, comprehensive defense strategy.
Explore runtime application self-protection (RASP) tools to detect and mitigate threats in real time. Start protecting your apps today!
Devyani Mehta is a content marketing specialist at G2. She has worked with several SaaS startups in India, which has helped her gain diverse industry experience. At G2, she shares her insights on complex cybersecurity concepts like web application firewalls, RASP, and SSPM. Outside work, she enjoys traveling, cafe hopping, and volunteering in the education sector. Connect with her on LinkedIn.
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