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    Overview
    ProductRatingMost Used ByProduct SummaryStarting Price

    Tenable Nessus

    Score8.8 out of 10
    N/ATenable headquartered in Columbia offers Nessus, a vulnerability scanning and security assessment solution used to analyze an entity's security posture, vulnerability testing, and provide configuration assessments.

    $2,790

    Zscaler Internet Access

    Score8.9 out of 10
    N/AZscaler Internet Access™ (ZIA) is a secure web gateway (SWG), delivering cloud native cyberthreat protection and zero trust access to the internet and SaaS apps.N/A
    Pricing
    Tenable NessusZscaler Internet Access
    Editions & Modules
    1 Year
    $2,790.00
    1 Year + Advanced Support
    $3,190.00
    2 Years
    $5,440.00
    2 Years + Advanced Support
    $6,240.00
    3 Years
    $7,951.00
    3 Years + Advanced Support
    $9,151.00
    No answers on this topic
    Offerings
    Pricing Offerings
    Tenable NessusZscaler Internet Access
    Free Trial
    NoNo
    Free/Freemium Version
    NoNo
    Premium Consulting/Integration Services
    NoYes
    Entry-level Setup FeeNo setup feeNo setup fee
    Additional Details——
    More Pricing Information
    Community Pulse
    Tenable NessusZscaler Internet Access
    Considered Both Products
    Tenable
    No answer on this topic
    Zscaler
    No answer on this topic
    Key User Insights
    Would buy again
    100%
    Would buy again
    8 Answers
    99%
    Would buy again
    284 Answers
    Delivers good value for the price
    100%
    Delivers good value for the price
    8 Answers
    98%
    Delivers good value for the price
    245 Answers
    Happy with the feature set
    100%
    Happy with the feature set
    8 Answers
    99%
    Happy with the feature set
    284 Answers
    Lived up to sales and marketing promises
    100%
    Lived up to sales and marketing promises
    8 Answers
    97%
    Lived up to sales and marketing promises
    207 Answers
    Implementation went as expected
    100%
    Implementation went as expected
    7 Answers
    93%
    Implementation went as expected
    227 Answers
    Features
    Tenable NessusZscaler Internet Access
    Threat Intelligence
    Comparison of Threat Intelligence features of Tenable Nessus and Zscaler Internet Access
    Feature
    Tenable Nessus
    6.3
    4 Ratings
    25% below category average
    Zscaler Internet Access
    8.5
    216 Ratings
    7% above category average
    Network Analytics1.02 Ratings8.7217 Ratings
    Threat Recognition7.14 Ratings8.3214 Ratings
    Vulnerability Classification9.53 Ratings8.5191 Ratings
    Automated Alerts and Reporting10.03 Ratings8.2205 Ratings
    Threat Analysis5.63 Ratings8.8203 Ratings
    Threat Intelligence Reporting5.13 Ratings8.5199 Ratings
    Automated Threat Identification5.63 Ratings8.5192 Ratings
    Vulnerability Management Tools
    Comparison of Vulnerability Management Tools features of Tenable Nessus and Zscaler Internet Access
    Feature
    Tenable Nessus
    7.5
    4 Ratings
    10% below category average
    Zscaler Internet Access
    -
    Ratings
    IT Asset Realization7.03 Ratings00 Ratings
    Authentication7.63 Ratings00 Ratings
    Configuration Monitoring8.14 Ratings00 Ratings
    Web Scanning5.63 Ratings00 Ratings
    Vulnerability Intelligence9.34 Ratings00 Ratings
    Identity Management
    Comparison of Identity Management features of Tenable Nessus and Zscaler Internet Access
    Feature
    Tenable Nessus
    -
    Ratings
    Zscaler Internet Access
    5.0
    2 Ratings
    55% below category average
    Multi-Factor Authentication00 Ratings5.02 Ratings
    Endpoint Security
    Comparison of Endpoint Security features of Tenable Nessus and Zscaler Internet Access
    Feature
    Tenable Nessus
    -
    Ratings
    Zscaler Internet Access
    10.0
    2 Ratings
    11% above category average
    Endpoint Detection and Response (EDR)00 Ratings10.02 Ratings
    Zero Trust Security
    Comparison of Zero Trust Security features of Tenable Nessus and Zscaler Internet Access
    Feature
    Tenable Nessus
    -
    Ratings
    Zscaler Internet Access
    8.9
    262 Ratings
    4% above category average
    Continuous Verification00 Ratings8.7245 Ratings
    Secure Web Gateways00 Ratings9.0236 Ratings
    Network Flow Control00 Ratings8.1217 Ratings
    Network Traffic Analysis00 Ratings8.8219 Ratings
    Segmentation Leveraging00 Ratings8.6194 Ratings
    Admin Access Control00 Ratings9.1230 Ratings
    Network Data Encryption00 Ratings8.8207 Ratings
    Network Topology Mapping00 Ratings10.02 Ratings
    Best Alternatives
    Tenable NessusZscaler Internet Access
    Small Businesses
    No answers on this topic
    No answers on this topic
    Medium-sized Companies
    Qualys TruRisk Platform
    Score6 out of 10
    No answers on this topic
    Enterprises
    Tenable Vulnerability Management
    Score8.9 out of 10
    Forescout Vistaro Platform
    Score6.6 out of 10
    All AlternativesView all alternativesView all alternatives
    User Ratings
    Tenable NessusZscaler Internet Access
    Likelihood to Recommend
    9.0
    (9 ratings)
    9.0
    (295 ratings)
    Likelihood to Renew
    9.1
    (1 ratings)
    8.4
    (6 ratings)
    Usability
    8.0
    (5 ratings)
    8.8
    (279 ratings)
    Availability
    -
    (0 ratings)
    7.3
    (1 ratings)
    Performance
    -
    (0 ratings)
    5.5
    (1 ratings)
    Support Rating
    7.1
    (4 ratings)
    7.1
    (10 ratings)
    Online Training
    -
    (0 ratings)
    7.3
    (1 ratings)
    Implementation Rating
    -
    (0 ratings)
    8.4
    (2 ratings)
    Configurability
    -
    (0 ratings)
    8.4
    (2 ratings)
    Product Scalability
    -
    (0 ratings)
    7.3
    (1 ratings)
    Vendor post-sale
    -
    (0 ratings)
    8.4
    (3 ratings)
    Vendor pre-sale
    -
    (0 ratings)
    7.3
    (2 ratings)
    User Testimonials
    Tenable NessusZscaler Internet Access
    Likelihood to Recommend
    Tenable
    It is an excellent tool for scanning servers, workstations, and network devices to identify missing patches and misconfiguration; we regularly use it to confirm patch effectiveness after the update; it also helps us for preparing audits such as iso 27001, and regulatory requirements, it also helps us to identify open ports and services that violate security.
    Read full review
    Zscaler
    I feel the product is very good to set up basic standards and go beyond that in many aspects. However, due to being sometimes too simple, it limits the ability to do some other complex changes. Having the ability to do both would be ideal for some, if not all, of the products within Zscaler Internet Access. A simple setup to have it stand-up, and more advanced settings for those more experienced.
    Incentivized
    Read full review
    Pros
    Tenable
    • Nessus is best at performing vulnerability scans, in fact, it gives findings and moreover accurate findings of the assessments. It does not do penetration testing or exploit the vulnerabilities because it is concerned about scanning the systems/applications.
    • In fact, Nessus has multiple profiles/policies to perform different types of scans such as, scans oriented for PCI-DSS, malware scans, web application scans, bad shell shock detection scan to name a few.
    • Nessus has the ability to classify the vulnerabilities into risk-based categories from critical to even informational which I think is one of the things that separates Nessus from other vulnerability scanners.
    Incentivized
    Read full review
    Zscaler
    • Provides a secure VPN connection point for endpoint connectivity.
    • Provides the VPN connectivity in a fast and reliable connection state.
    • Very dependable, once connected the connection stays up and there's no fuss.
    • Very good at letting you know when you are not authenticated.
    • Very easy to authenticate and regain access when your session times out.
    Incentivized
    Read full review
    Cons
    Tenable
    • The tool has lots of options for setting up before scanning any device, this methodology could be simplified further with default configuration for various devices predefined, anyhow we can use this technique by making use of policies.
    • For advanced users we cannot disable the plugins inside the plugin groups, we can enable the whole set of plugins at a time, for few hundreds its ok, but thousands of plugins are of waste of resource and time.
    Incentivized
    Read full review
    Zscaler
    • ZS CLI support to turn off ZIA and ZDX service specifically on mac.
    • Better visibility into failed posture devices, including a timeline and the reason the posture failed (This is about the Zscaler mobile portal: Enrolled devices --> Failed posture devices).
    Incentivized
    Read full review
    Likelihood to Renew
    Tenable
    Nessus is best and easy to use application for Vulnerabilities finding and reporting, it has multiple platforms and wide scope covering almost all devices for security improvement so far, thus we are very likely to continue its services.
    Incentivized
    Read full review
    Zscaler
    While Zscaler Internet Access (ZIA) delivers critical value in cloud security and RBI compliance, I rate renewal likelihood 7/10 due to evolving needs versus platform limitations. Below is my rationale:
    Key Gaps:
    1. Advanced Threat Costs:
    ZIA’s add-ons (e.g., Advanced DLP, Sandboxing) incur 35%+ cost premiums – straining budgets as transaction volumes (UPI/iMobile) grow 50% YoY.
    2. API Banking Scalability:
    ZIA’s API rate limits throttle real-time policy sync during UPI peaks (10K+ TPS), forcing workarounds for finacle integrations.
    3. RBI Future-Proofing:
    Limited native support for upcoming digital rupee (CBDC) security rules requires custom development, increasing compliance overhead.
    Incentivized
    Read full review
    Usability
    Tenable
    Tenable Nessus is a great product and provides a lot of value, but it is difficult to set up and use and the amount of data it generates can be overwhelming. It does help us prioritize based on the severity of the detection, however there are sometimes mitigating factors that we have implemented that Nessus does not account for, which causes lots of noise in the reports.
    Incentivized
    Read full review
    Zscaler
    Getting started was pretty straightforward. We can tell the product is way more robust than we are using it. It started as a replacement for previous DNS-blocking content filtering, but we're exploring how this will add value with an upcoming DLP redesign and with traffic optimization at some of our remote sites with severe bandwidth limits.
    Incentivized
    Read full review
    Performance
    Tenable
    No answers on this topic
    Zscaler
    There are often performance issues reported
    Incentivized
    Read full review
    Support Rating
    Tenable
    I haven't needed to contact support yet. But issues are easily solved with a quick internet search which means support and by extension, the larger community are involved and knowledgeable.
    Incentivized
    Read full review
    Zscaler
    Zscaler's ZIA support is quick and knowledgable. They respond within 1-2 hours of you submitting your ticket. They are very thorough and are typically ready to jump on a live troubleshooting session. Our ZIA platform and how we use is it unique so at times tickets can be open for weeks but we alway get quality support compared to other unrelated product support in our enterprise
    Incentivized
    Read full review
    Implementation Rating
    Tenable
    No answers on this topic
    Zscaler
    good the engineer give excellent support and eplanation
    Incentivized
    Read full review
    Alternatives Considered
    Tenable
    Sometimes when we identify a vulnerability with Nessus that has an exploit, we made a proof of concept with Metasploit in order to show to the IT managers the importance of the software/hardware hardening.
    Incentivized
    Read full review
    Zscaler
    The overall user community and scope of supportability outweighed the others on our short list. Netskope was a close second, but the risk, though small, was greater than that of bringing Zscaler aboard. We were looking for a mature, well-supported, highly functional, and fine-grained solution that met all our user and information security requirements.
    Incentivized
    Read full review
    Return on Investment
    Tenable
    • Nessus certainly has a positive impact while me while performing my job, either as security research, or performing vulnerability assessments for clients. It gives a lot of information about the system/application after performing scans. The number of false positives is also less compared to other vulnerability scanners.
    • The professional edition is very useful as policy templates available in this edition are very handy and useful even to perform compliance scan like PCI DSS scan.
    • Also, the ability to export the scan results into reports in formats like HTML, PDF is very useful which could be for performing system/application reviews.
    Incentivized
    Read full review
    Zscaler
    • I would say it has a very good ROI, as whenever someone can't access something, they submit a ticket to our network engineer, and within minutes, the site is safely added to ZIA with best-practice configurations. After seeing a little of the UI from the Zenith event, it seems very user-friendly to control these policies.
    Incentivized
    Read full review
    ScreenShots

    Zscaler Internet Access Screenshots

    Screenshot of an overview of Zscaler Internet Access (ZIA), a cloud native security service edge (SSE) solution that builds on a decade of secure web gateway leadership. Offered as a scalable SaaS platform through Zscaler's security cloud, it replaces legacy network security solutions, preventing advanced attacks and data loss with a comprehensive zero trust approach. ZIA is integrated into the Zscaler Zero Trust Exchange™ to provide superior defense-in-depth, secure connectivity, end user experience, and administrative visibility and control.