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Developer Tools · head to head

GNAT Pro vs Zscaler Internet Access

GNAT Pro logo

GNAT Pro

Developer Tools

Software development environments and toolchains for Ada, C/C++ and Rust

From
On request
Free plan
No
Full reviewWebsite
Zscaler Internet Access logo

Zscaler Internet Access

Cybersecurity

Secure cloud-native internet and SaaS access

From
$100/year
Free plan
No
Full reviewWebsite

The short version

  • Each has a real cost: GNAT Pro no pricing published on website; requires contacting AdaCore directly for quotes; Zscaler Internet Access the pricing page names two base tiers, Essentials Platform and Zscaler Platform, plus modular add ons including three Digital Experience Monitoring tiers, but publishes no dollar figures anywhere and routes buyers to a demo request for cost
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which GNAT Pro and Zscaler Internet Access actually diverge.

Attributes where GNAT Pro and Zscaler Internet Access differ
AttributeGNAT ProZscaler Internet Access
Starting priceOn request$100/year
Pricing modelquotesubscription
PlatformsWebWeb, Desktop, Mobile
CategoryDeveloper ToolsCybersecurity
FoundedUnknown2007

Identical on both: free tier (No), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in GNAT Pro

Nothing recorded that Zscaler Internet Access does not also cover.

Only in Zscaler Internet Access

  • Secure web gateway
  • Cloud firewall
  • URL filtering
  • Advanced threat protection
  • Data loss prevention
  • Cloud sandbox
  • Browser isolation
  • CASB

What people use each for

The jobs each tool is most often brought in to do.

GNAT Pro

  • Building certified avionics software meeting DO-178B/C standardsnot Zscaler Internet Access
  • Developing automotive embedded systems with ISO-26262 compliancenot Zscaler Internet Access
  • Integrating Ada, C/C++, and Rust components in single codebasenot Zscaler Internet Access
  • Managing software supply chain vulnerabilities and SBOMsnot Zscaler Internet Access
  • Supporting long-lived software systems spanning decadesnot Zscaler Internet Access

Zscaler Internet Access

  • Cloud Securitynot GNAT Pro
  • Zero Trustnot GNAT Pro
  • Web Securitynot GNAT Pro

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

GNAT Pro

  • No pricing published on website; requires contacting AdaCore directly for quotes
  • Vendor indicates per-user, per-year subscription model but does not disclose specific costs

Zscaler Internet Access

  • The pricing page names two base tiers, Essentials Platform and Zscaler Platform, plus modular add ons including three Digital Experience Monitoring tiers, but publishes no dollar figures anywhere and routes buyers to a demo request for cost

Pricing, plan by plan

GNAT Pro

On request

No published plan breakdown. See the GNAT Pro review.

Zscaler Internet Access

$100/year
  • ZIA Business$100/year
    • Web security
    • URL filtering
    • Cloud firewall
  • ZIA Transformation$200/year
    • All Business features
    • Advanced threat protection
    • Cloud sandbox
  • ZIA Unlimited$350/year
    • All Transformation features
    • Cloud browser isolation
    • CASB

Which should you pick?

Choose GNAT Pro if

Nothing in the data separates GNAT Pro from Zscaler Internet Access on the points above - pick on price and on how each one feels to use.

GNAT Pro review

Choose Zscaler Internet Access if

  • You need secure web gateway.
  • You work on Web, Desktop, Mobile.
  • You also want cloud firewall.
Zscaler Internet Access review

Questions people ask

Is GNAT Pro or Zscaler Internet Access better?
Neither clearly leads. GNAT Pro starts at On request and Zscaler Internet Access at $100/year, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, GNAT Pro or Zscaler Internet Access?
GNAT Pro starts at On request and Zscaler Internet Access at $100/year.
Does GNAT Pro or Zscaler Internet Access run on more platforms?
GNAT Pro runs on Web. Zscaler Internet Access runs on Web, Desktop, Mobile.
What is GNAT Pro best used for?
GNAT Pro is most often used for building certified avionics software meeting do-178b/c standards, developing automotive embedded systems with iso-26262 compliance, integrating ada, c/c++, and rust components in single codebase, managing software supply chain vulnerabilities and sboms. Of those, building certified avionics software meeting do-178b/c standards and developing automotive embedded systems with iso-26262 compliance are not what Zscaler Internet Access is typically brought in for.
What can GNAT Pro do that Zscaler Internet Access cannot?
Zscaler Internet Access covers Secure web gateway, Cloud firewall, URL filtering, Advanced threat protection.

Answered from the vendors’ own pages

GNAT Pro: How much does GNAT Pro cost?

GNAT Pro pricing is not published on the website. Customers must request a pricing quote by contacting AdaCore directly or speaking with a GNAT Pro expert.

Source
Zscaler Internet Access: How many pricing tiers does Zscaler Internet Access offer?

Zscaler Internet Access offers two main platform bundles: the Essentials Platform (entry-level) and the Zscaler Platform (comprehensive). Specific pricing is not published online.

Source
GNAT Pro: What is GNAT Pro licensing model?

GNAT Pro is sold on a per-user, per-year basis with no license locks. Customers can request pricing for their specific needs.

Source
Zscaler Internet Access: Are there optional add-on modules available?

Yes. Zscaler offers extensive optional capabilities in five categories including Inline Cyberthreat Protection, Private Access enhancements, Data Security, Security Operations, and Zero Trust Branch.

Source
Zscaler Internet Access: How is Zscaler Zero Trust Branch priced?

Zero Trust Branch is sized by encrypted throughput (200 Mbps to 10 Gbps) or endpoint count (200 to 5,000 endpoints), with pricing varying by configuration.

Source
Zscaler Internet Access: How do I get Zscaler pricing?

Zscaler does not publish pricing online. You must request a demo or contact their sales team to receive a pricing quote.

Source
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