Best AI Security markBest AI Security

Head to head · Checked against vendor sites, September 2026

Onyx Security vs Bloom Security: AI agent security compared

The verdict

Onyx Security scores higher overall on our weights (7.4 vs 6.0 out of 10). Onyx Security scores higher on tool-call control, policy, footprint, identity and audit, maturity and breadth; Bloom Security scores higher on visibility. Neither publishes list prices.

Onyx Security

Best for inline control across many AI surfaces

Read the Onyx Security review

Bloom Security

Best for endpoint software and extension inventory

Read the Bloom Security review

How do Onyx Security and Bloom Security compare on each criterion?

Endpoint AI control score, editorial assessment 0-10. Edge is the higher score on each row.
CriterionWeightOnyx SecurityBloom SecurityEdge
Visibility22%79Bloom Security
Why these scores

Onyx Security: Discovers AI agents across SaaS, cloud, endpoint and code; endpoint inventory detail is lighter than endpoint-first tools.

Bloom Security: Discovers software, extensions, AI tools and everything running on the endpoint, with who built it and what it can access.

Tool-call control20%86Onyx Security
Why these scores

Onyx Security: Inspects every prompt, tool call and model response inline.

Bloom Security: Defines what AI agents can access, execute and transmit and scales back overpermissioned MCP servers; runtime tool-call decisions not detailed.

Policy15%87Onyx Security
Why these scores

Onyx Security: Five enforcement actions: alert, block, mask, steer, or ask a human.

Bloom Security: Blocks malicious or policy-violating packages and skills across npm, Chrome Web Store and Open VSX.

Identity and audit12%74Onyx Security
Why these scores

Onyx Security: Agent identity and access governance is a named solution.

Bloom Security: Not described on the pages we reviewed.

Footprint13%64Onyx Security
Why these scores

Onyx Security: Works across endpoint agents, browser extensions, APIs and gateways; the endpoint component is a resident agent or extension.

Bloom Security: Deployment method not published.

Breadth8%95Onyx Security
Why these scores

Onyx Security: Browser AI, coding assistants, desktop agents, cloud workloads and MCP servers, plus agentic red teaming.

Bloom Security: Endpoint focused, including non-AI software.

Maturity10%74Onyx Security
Why these scores

Onyx Security: $113M Series B announced 29 July 2026; SOC 2 Type II and ISO 27001 listed; pricing not published.

Bloom Security: Limited public company information; SOC 2 listed; investors and pricing not published.

Total100%7.46.0Onyx Security

How we score

How do they deploy, and what do they cost?

Published facts, reviewed September 2026.
AttributeOnyx SecurityBloom Security
OwnerNot acquiredNot acquired
How it reaches devicesEndpoint agent, browser extension, API, gatewayNot published
Deployment detailOnyx says it needs no SDK changes and works across endpoint agents, browser extensions, APIs and gateways. It integrates with Okta, Entra, Splunk and CrowdStrike. On devices this means a resident component, which is why it scores lower on footprint than tools that deploy through EDR or MDM.Not published on the pages we reviewed.
PricingContact sales. Onyx Security does not publish pricing.Contact sales. Pricing is not published.

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

Which should you choose?

Choose Onyx Security if

  • Your priority matches our designation for Onyx Security: best for inline control across many AI surfaces.
  • Your agents also run in SaaS platforms, cloud workloads or apps you build: Onyx Security scores 9 to 5.
  • You need an audit record that separates agent actions from human actions: Onyx Security scores 7 to 4.

Choose Bloom Security if

  • Your priority matches our designation for Bloom Security: best for endpoint software and extension inventory.
  • You need a fleet-wide inventory of AI agents, MCP servers, extensions and credentials on devices: Bloom Security scores 9 to 7.

Frequently asked questions

Which is better, Onyx Security or Bloom Security?

Onyx Security scores higher overall on our weights (7.4 vs 6.0 out of 10). Onyx Security scores higher on tool-call control, policy, footprint, identity and audit, maturity and breadth; Bloom Security scores higher on visibility. Scores are editorial assessments from public vendor material, reviewed September 2026.

Do Onyx Security and Bloom Security publish prices?

No. Neither publishes list prices, so ask both for a quote.

Do Onyx Security or Bloom Security replace EDR?

No. The tools in this guide add control over AI agent actions and work alongside EDR. Onyx Security: Endpoint agent, browser extension, API, gateway. Bloom Security: Not published.

Related

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