Prompt Security (SentinelOne) alternatives (2026)

These points come from what Prompt Security's public pages do and do not show, reviewed September 2026. They are not user complaints or test results.

• The deployment method is not detailed on the page we reviewed.
• Per-tool-call enforcement is not described publicly.
• It is built into the SentinelOne Singularity Platform, which suits SentinelOne customers most.
• Pricing is not published.

Source: SentinelOne Prompt Security page · SentinelOne press release, 5 August 2025 · prompt.security · Reviewed Sep 2026

1. Bay

   7.9 / 10 · rank 1

   Editors' pick for endpoint agent control

   Scores higher than Prompt Security on: visibility, tool-call control, policy, footprint and identity and audit.

   Prompt Security is still stronger on: maturity and breadth.

   Bay reviewPrompt Security vs Bay

2. Noma Security

   7.5 / 10 · rank 2

   Best for endpoint plus SaaS and homegrown agents

   Scores higher than Prompt Security on: visibility, tool-call control, footprint, identity and audit and breadth.

   Prompt Security is still stronger on: maturity.

   Ties on: policy.

   Noma Security reviewPrompt Security vs Noma Security

3. Onyx Security

   7.4 / 10 · rank =3

   Best for inline control across many AI surfaces

   Scores higher than Prompt Security on: tool-call control, policy, identity and audit and breadth.

   Prompt Security is still stronger on: maturity.

   Ties on: visibility and footprint.

   Onyx Security reviewPrompt Security vs Onyx Security

4. Zenity

   7.4 / 10 · rank =3

   Best for SaaS and Microsoft agent estates

   Scores higher than Prompt Security on: visibility, tool-call control, identity and audit and breadth.

   Prompt Security is still stronger on: footprint.

   Ties on: policy and maturity.

   Zenity reviewPrompt Security vs Zenity

5. Harmonic Security

   7.1 / 10 · rank =5

   Best for data protection in everyday AI use

   Scores higher than Prompt Security on: tool-call control, policy, footprint and identity and audit.

   Prompt Security is still stronger on: maturity and breadth.

   Ties on: visibility.

   Harmonic Security reviewPrompt Security vs Harmonic Security

6. Koi (Palo Alto Networks)

   7.1 / 10 · rank =5

   Best for Palo Alto Cortex customers

   Scores higher than Prompt Security on: visibility and tool-call control.

   Prompt Security is still stronger on: maturity and breadth.

   Ties on: policy, footprint and identity and audit.

   Koi reviewPrompt Security vs Koi

7. Lasso Security

   6.6 / 10 · rank =7

   Best for MCP gateway and Claude Code hooks

   Scores higher than Prompt Security on: tool-call control.

   Prompt Security is still stronger on: visibility and maturity.

   Ties on: policy, footprint, identity and audit and breadth.

   Lasso Security reviewPrompt Security vs Lasso Security

8. Bloom Security

   6.0 / 10 · rank 9

   Best for endpoint software and extension inventory

   Scores higher than Prompt Security on: visibility.

   Prompt Security is still stronger on: footprint, identity and audit, maturity and breadth.

   Ties on: tool-call control and policy.

   Bloom Security reviewPrompt Security vs Bloom Security

Compare Prompt Security with its top three alternatives side by side

Stay with Prompt Security if vendor maturity, public documentation and backing weigh heavily in procurement. Shortlist Prompt Security if you run SentinelOne Singularity and want AI usage and code assistant protection in the same platform.

• Prompt Security (SentinelOne) review
• Compare side by side
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• Best AI security tools