Onyx Security alternatives (2026)

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

• On devices it uses its own endpoint agent or browser extension rather than deploying through existing EDR or MDM.
• Several components to run: endpoint agent, browser extension, APIs and gateways.
• Endpoint inventory detail is described less specifically than endpoint-first tools.
• Pricing is not published.

Source: onyx.security · Onyx AI security · Onyx Series B · Reviewed Sep 2026

1. Bay

   7.9 / 10 · rank 1

   Editors' pick for endpoint agent control

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

   Onyx Security is still stronger on: maturity and breadth.

   Bay reviewOnyx Security vs Bay

2. Noma Security

   7.5 / 10 · rank 2

   Best for endpoint plus SaaS and homegrown agents

   Scores higher than Onyx Security on: visibility and footprint.

   Onyx Security is still stronger on: tool-call control and policy.

   Ties on: identity and audit, maturity and breadth.

   Noma Security reviewOnyx Security vs Noma Security

3. Zenity

   7.4 / 10 · rank =3

   Best for SaaS and Microsoft agent estates

   Scores higher than Onyx Security on: visibility and maturity.

   Onyx Security is still stronger on: policy and footprint.

   Ties on: tool-call control, identity and audit and breadth.

   Zenity reviewOnyx Security vs Zenity

4. Harmonic Security

   7.1 / 10 · rank =5

   Best for data protection in everyday AI use

   Scores higher than Onyx Security on: footprint.

   Onyx Security is still stronger on: tool-call control, identity and audit and breadth.

   Ties on: visibility, policy and maturity.

   Harmonic Security reviewOnyx Security vs Harmonic Security

5. Koi (Palo Alto Networks)

   7.1 / 10 · rank =5

   Best for Palo Alto Cortex customers

   Scores higher than Onyx Security on: visibility.

   Onyx Security is still stronger on: tool-call control, policy, identity and audit and breadth.

   Ties on: footprint and maturity.

   Koi reviewOnyx Security vs Koi

6. Lasso Security

   6.6 / 10 · rank =7

   Best for MCP gateway and Claude Code hooks

   Does not score higher than Onyx Security on any criterion.

   Onyx Security is still stronger on: visibility, policy, identity and audit, maturity and breadth.

   Ties on: tool-call control and footprint.

   Lasso Security reviewOnyx Security vs Lasso Security

7. Prompt Security (SentinelOne)

   6.6 / 10 · rank =7

   Best for SentinelOne customers

   Scores higher than Onyx Security on: maturity.

   Onyx Security is still stronger on: tool-call control, policy, identity and audit and breadth.

   Ties on: visibility and footprint.

   Prompt Security reviewOnyx Security vs Prompt Security

8. Bloom Security

   6.0 / 10 · rank 9

   Best for endpoint software and extension inventory

   Scores higher than Onyx Security on: visibility.

   Onyx Security is still stronger on: tool-call control, policy, footprint, identity and audit, maturity and breadth.

   Bloom Security reviewOnyx Security vs Bloom Security

Compare Onyx Security with its top three alternatives side by side

Stay with Onyx Security if you need to evaluate or stop individual tool calls before they run, you want context-aware rules and answers beyond allow and block, you need an audit record that separates agent actions from human actions and your agents also run in SaaS platforms, cloud workloads or apps you build. Shortlist Onyx Security if you want a single inline control point across browser AI, coding assistants and cloud agents, with masking and steering rather than only blocking.

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