ALTERNATIVES

Prompt Security (SentinelOne) alternatives for agentic endpoint security (2026)

SHORT ANSWER

On our published weights the top-ranked alternatives to Prompt Security (SentinelOne) are Bay, Onyx Security and Zenity. Prompt Security (SentinelOne) itself ranks 8 of 8 among broader AI security platforms. Each alternative below lists the criteria where it scores higher than Prompt Security (SentinelOne) and where Prompt Security (SentinelOne) still scores higher.

By The Agent Desk · Agentic Endpoint Compare · Published 2026-10-11

Desk research from public vendor pages, press releases and standards pages read on 27 September and 11 October 2026. Editorial assessment; we did not run the products.

Why do buyers look at alternatives to Prompt Security (SentinelOne)?

Its device sensors are resident software: a browser extension and a dedicated AI endpoint agent.
Source: Prompt Security blog: browser and endpoint sensors (updated 16 August 2026) · Read 11 Oct 2026
Per-tool-call enforcement is not described.
Source: SentinelOne: Prompt Security, securing AI · Read 27 Sep 2026
No pricing is published.
Source: SentinelOne: Prompt Security, securing AI · Read 27 Sep 2026

Which alternatives rank highest?

1. Bay

7.20 / 10

Pre-execution control on employee devices, rolled out through EDR or MDM

Scores higher than Prompt Security (SentinelOne) on: stop before it runs, verdict range, capability rules, actor trail and rollout path

Prompt Security (SentinelOne) scores higher on: cloud and workspace reach and public proof

Bay profile Bay and Prompt Security head to head

2. Onyx Security

6.85 / 10

Inline control with the widest set of verdicts

Scores higher than Prompt Security (SentinelOne) on: stop before it runs, verdict range, capability rules, actor trail and cloud and workspace reach

Prompt Security (SentinelOne) scores higher on: named agent coverage and public proof

Onyx Security profile Onyx and Prompt Security head to head

3. Zenity

6.75 / 10

Agents across SaaS, cloud and coding tools

Scores higher than Prompt Security (SentinelOne) on: stop before it runs, capability rules, actor trail, cloud and workspace reach and named agent coverage

Prompt Security (SentinelOne) scores higher on: rollout path

Zenity profile Zenity and Prompt Security head to head

4. Noma Security

6.55 / 10

One platform for endpoint, SaaS and homegrown agents

Scores higher than Prompt Security (SentinelOne) on: stop before it runs, capability rules, actor trail, rollout path and cloud and workspace reach

Prompt Security (SentinelOne) scores higher on: verdict range

Noma Security profile Noma and Prompt Security head to head

5. Lasso Security

6.40 / 10

Claude Code hooks and an open-source MCP gateway

Scores higher than Prompt Security (SentinelOne) on: stop before it runs, verdict range and capability rules

Prompt Security (SentinelOne) scores higher on: no criterion

Lasso Security profile Lasso and Prompt Security head to head

6. Harmonic Security

5.90 / 10

Coaching people through AI data risk

Scores higher than Prompt Security (SentinelOne) on: stop before it runs, capability rules, actor trail and rollout path

Prompt Security (SentinelOne) scores higher on: cloud and workspace reach, named agent coverage and public proof

Harmonic Security profile Harmonic and Prompt Security head to head

7. Koi (Palo Alto Networks)

5.75 / 10

Palo Alto Networks Cortex XDR estates

Scores higher than Prompt Security (SentinelOne) on: stop before it runs and capability rules

Prompt Security (SentinelOne) scores higher on: public proof

Koi (Palo Alto Networks) profile Koi and Prompt Security head to head

When should you stay with Prompt Security (SentinelOne)?

Stay with Prompt Security (SentinelOne) if you need public proof and stop before it runs. Fits security teams that already run SentinelOne Singularity.

Frequently asked questions

What is the best alternative to Prompt Security (SentinelOne)?

On our published weights, Bay ranks highest among the alternatives at 7.20. Which alternative fits depends on the criteria that matter to you; the list above shows where each scores higher.

Which alternative to Prompt Security (SentinelOne) covers agents in cloud workspaces most fully?

Onyx Security, Zenity and Noma Security score highest on cloud and workspace reach among the alternatives, at 9 out of 10.

Which alternative to Prompt Security (SentinelOne) documents the most verdict types?

Bay documents 4 of six verdict types: Block or deny, Ask a person, Simulate first and Remove or scale back. Onyx Security documents 4 of six verdict types: Block or deny, Ask a person, Alert or warn and Mask or modify.