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Head-to-head · Lockdown Browser Software

Prometric Secure Proprietary Browser vs Mercer | Mettl

  • Updated Oct 2026
  • Both researched from official sources
  • 2 checks side by side
Higher score Prometric Secure Proprietary Browser #2 in Lockdown Browser Software 8.6/10 Pricing on request ✓ 2 of 4 features Visit Prometric
Mercer | Mettl #8 in Lockdown Browser Software 7.8/10 Pricing on request ✓ 0 of 4 features Visit Mercer | Mettl

Prometric Secure Proprietary Browser leads on 0 checks, Mercer | Mettl on 0, and 2 are even. Who comes out ahead on the 2 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scorePrometric Secure Proprietary Browser · 8.6/10
  • Most featuresPrometric Secure Proprietary Browser · 2 of 4

Prometric Secure Proprietary Browser scores higher on our rubric for lockdown browser software: 8.6 against 7.8 out of 10; our editors rank them #2 and #8.

Prometric Secure Proprietary Browser is the better fit for enterprise testing with integrated proctoring. Mercer | Mettl is the better fit for employers needing assessment and proctoring breadth.

  • Prometric Secure Proprietary Browser fits best

    Enterprise testing with integrated proctoring

  • Mercer | Mettl fits best

    Employers needing assessment and proctoring breadth

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Prometric Secure Proprietary Browser 8.6/10 Visit ↗ Mercer | Mettl 7.8/10 Visit ↗
At a glance
Editor score 8.6 7.8
Ranking #2 in Lockdown Browser Software #8 in Lockdown Browser Software
Best for Enterprise testing with integrated proctoring Employers needing assessment and proctoring breadth
Pricing model Paid Paid
Starting price Pricing on request Pricing on request
Free plan Not checked yet Not checked yet
Free trial — —
Deployment Desktop Cloud
Platforms Windows, macOS Web
Support Live chat Email, Phone, Docs · 24/7
Compliance ISO 27001, GDPR, PCI DSS SOC 2, ISO 27001, GDPR, SSO/SAML, 2FA
Built for Mid-market, Enterprise Mid-market, Enterprise
Features Prometric Secure Proprietary Browser 2/4 · Mercer | Mettl 0/4
Blocks app switching ✓ (best) Not checked yet
Blocks copy and printing ✓ (best) Not checked yet
Blocks screen capture Not checked yet Not checked yet
Offline assessment mode Not checked yet Not checked yet
Specs
Supported platforms Windows, macOS Not checked yet
LMS integration Not checked yet Not checked yet
Our review
Pros
  • Blocks copying, printing, app switching, and prohibited browser actions
  • Supports automated AI and live remote proctoring
  • Adds authentication, environmental checks, analytics, and real-time support
  • Combines browser lockdown, authentication and AI-assisted or human proctoring.
  • Supports custom assessments across technical, cognitive and behavioral use cases.
  • Offers advanced reporting, benchmarking, REST APIs and result webhooks.
Cons
  • Pricing requires contacting sales
  • Supports Windows and macOS only
  • Designed for Prometric remote-testing programs rather than self-service use
  • Pricing is customized through a contact-sales process.
  • Its broad assessment scope may exceed the needs of lockdown-only teams.
  • Teams must evaluate which assessment and proctoring workflows fit their needs.
Our verdict

Prometric Secure Proprietary Browser is a locked-down desktop application for organizations delivering remotely proctored assessments. It runs with Prometric’s ProProctor remote assessment platform and restricts non-essential browser…

Read the review →

Mercer | Mettl is a cloud-based talent assessment platform for employers, education providers and other organizations. It covers personality, behavioral, cognitive, technical, coding, communication and domain assessments, with custom…

Read the review →
  1. Prometric Secure Proprietary BrowserLockdown Browser Software 8.6Pricing on request
  2. Mercer | MettlLockdown Browser Software 7.8Pricing on request

Strengths and trade-offs

  • Prometric Secure Proprietary Browser — where it wins

    • Blocks copying, printing, app switching, and prohibited browser actions
    • Supports automated AI and live remote proctoring
    • Adds authentication, environmental checks, analytics, and real-time support

    Where it doesn't

    • Pricing requires contacting sales
    • Supports Windows and macOS only
    • Designed for Prometric remote-testing programs rather than self-service use

  • Mercer | Mettl — where it wins

    • Combines browser lockdown, authentication and AI-assisted or human proctoring.
    • Supports custom assessments across technical, cognitive and behavioral use cases.
    • Offers advanced reporting, benchmarking, REST APIs and result webhooks.

    Where it doesn't

    • Pricing is customized through a contact-sales process.
    • Its broad assessment scope may exceed the needs of lockdown-only teams.
    • Teams must evaluate which assessment and proctoring workflows fit their needs.
  • Prometric Secure Proprietary Browser8.6/10 · Pricing on request

    A controlled exam desktop with authentication, proctoring, analytics, and support.

    Visit PrometricFull verdict →
  • Mercer | Mettl7.8/10 · Pricing on request

    A broad assessment platform with browser lockdown, proctoring and reporting for employers.

    Visit Mercer | MettlFull verdict →

More comparisons

All lockdown browser software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update