Is Onyx or Sun better for AI endpoint control?

Neither is scored on this site. Onyx describes 3 of four product control types and Sun 0 on the pages we read, and they differ on 7 recorded facts. Which fits depends on the AI tools people use, your devices, where the work happens and whether you block or guide; the finder checks those.

Which of the two decides on a tool call before it runs?

Onyx: Matches. Sun: Matches. Warn or ask: Onyx Matches, Sun Not in our sources.

Do Onyx or Sun publish prices?

Onyx: Not published. Sun: Not published (demo request).

HEAD-TO-HEAD · FACTS ONLY

Onyx vs Sun: AI endpoint control facts side by side

Short answer

Onyx describes 3 of the four product control types on the pages we read and Sun describes 0; they differ on on-device control, browser extension and AI or MCP gateway. On decisions, Onyx decides on a tool call before it runs and Sun decides on a tool call before it runs. We do not score either; the right choice depends on the AI tools people use, your devices, your current stack and whether you block or guide.

By The Device Desk · Endpoint AI Finder · Published 2026-10-11

Desk research from public vendor pages read on 27 September and 11 October 2026. Profiles follow our published method; we did not run the products.

Vendor pages read September and October 2026 · updated 2026-10-13

Where do their controls sit?

Filled or hatched marker: Onyx
Dashed teal ring: Sun, described

DEV Filled marker: described on the product pages we read
DEV Hatched marker: partly described (another component, a narrower scope, or method not detailed)
DEV Dashed marker: not in our sources (it may exist; we did not find it)

The map shows where each product's own pages describe a control, or where your answers point. It is not a measure of how well a product works.

What are the facts, side by side?

Onyx Security and Sun Security, from each product's own pages. Differs is computed from recorded statuses, not wording.
Fact	Onyx	Sun
Owner	None	None
Positioning	"The Secure AI Control Plane for the Agentic Era": inline inspection of prompts, tool calls and model responses across browser AI, coding assistants, desktop AI agents, cloud workloads and MCP servers. Based in Tel Aviv and New York.	AI agent security that says it sits in the path of every AI agent across workstations, cloud and SaaS, with three capabilities: discovery, posture management that learns each agent's purpose, and runtime checks of every tool call, connection and resource draw against that purpose before it executes.
How it reaches devices	Endpoint agents, browser extensions, APIs and gateways. Source: Onyx Security: AI security platform · Read 27 Sep 2026	Not described; the site says you can get started in 5 minutes. Source: Sun Security homepage · Read 13 Oct 2026
On-device controlDiffers	DescribedEndpoint agents cover coding assistants and desktop AI agents. Source: Onyx Security: AI security platform · Read 27 Sep 2026	Partly describedCovers agents on workstations; the on-device method is not described. Source: Sun Security homepage · Read 13 Oct 2026
Browser extensionDiffers	DescribedBrowser extensions cover browser AI. Source: Onyx Security: AI security platform · Read 27 Sep 2026	Not in our sourcesNot described on the pages we read.
Network or SSE proxy	Not in our sourcesNot described on the pages we read.	Not in our sourcesNot described on the pages we read.
AI or MCP gatewayDiffers	DescribedGateways and APIs inspect traffic inline. Source: Onyx Security: AI security platform · Read 27 Sep 2026	Not in our sourcesNot described on the pages we read.
Names the coding agents it covers	PartlyCovers coding assistants; specific tools are not named on the pages we read. Source: Onyx Security: AI security platform · Read 27 Sep 2026	PartlyNames Cursor and Claude Cowork; Claude Code, Codex and GitHub Copilot are not named. Source: Sun Security homepage · Read 13 Oct 2026
Decides on a tool call before it runs	MatchesInspects every prompt, tool call and model response inline. Source: Onyx Security: AI security platform · Read 27 Sep 2026	MatchesEvery tool call, connection and resource draw is checked against the agent's purpose before it executes. Source: Sun Security homepage · Read 13 Oct 2026
Controls what goes into browser AIDiffers	MatchesCan mask data in browser AI as well as block it. Source: Onyx Security: AI security platform · Read 27 Sep 2026	Not in our sources
Rolls out through EDR or device management you run	Not in our sources	Not in our sources
Can warn or ask instead of only blockingDiffers	MatchesFive actions: alert, block, mask, steer or ask. Source: Onyx Security: AI security platform · Read 27 Sep 2026	Not in our sources
Can block an agent, tool or actionDiffers	MatchesBlock is one of five actions. Source: Onyx Security: AI security platform · Read 27 Sep 2026	PartlyIts demo shows a stopped action. Source: Sun Security homepage · Read 13 Oct 2026
Has a watch-only or simulation modeDiffers	PartlyAlert is one of five actions; a simulation mode is not described. Source: Onyx Security: AI security platform · Read 27 Sep 2026	Not in our sources
Records who or what took each action	PartlyIntegrates with Okta, Entra and Splunk; separating a person from an agent is not described. Source: Onyx Security: AI security platform · Read 27 Sep 2026	PartlyIts demo shows an action log. Source: Sun Security homepage · Read 13 Oct 2026
Also covers SaaS, cloud or homegrown AI	MatchesCloud workloads and MCP servers as well as devices. Source: Onyx Security: AI security platform · Read 27 Sep 2026	MatchesNames Copilot Studio and AWS Bedrock agents. Source: Sun Security homepage · Read 13 Oct 2026
Has a public price or tiers (vendor site or marketplace)	Not in our sources	Not in our sources
Built into	None	None
Works with	Lists CrowdStrike among its integrations. Source: Onyx Security: AI security platform · Read 27 Sep 2026	None in our sources
Price	Not published. Source: Onyx Security homepage · Read 27 Sep 2026	Not published (demo request). Source: Sun Security homepage · Read 13 Oct 2026

Where do they differ?

On-device control: Onyx describes it; Sun partly describes it.
Browser extension: Onyx describes it; Sun is not in our sources.
AI or MCP gateway: Onyx describes it; Sun is not in our sources.
Controls what goes into browser AI: Onyx matches; Sun is not in our sources.
Can warn or ask instead of only blocking: Onyx matches; Sun is not in our sources.
Can block an agent, tool or action: Onyx matches; Sun partly matches.
Has a watch-only or simulation mode: Onyx partly matches; Sun is not in our sources.

Choose Onyx if

You want masking or steering rather than only allow or block
AI use spans the browser, desktop apps, coding tools and cloud workloads

Choose Sun if

You want each agent action checked against that agent's purpose

Which limits should you check?

Onyx

Uses its own endpoint agents and browser extensions, so there is something new to roll out to devices.
No pricing published, and specific coding agents are not named on the pages we read.

Sun

Sun's site is a single marketing page, so most details are not described.
How it reaches devices is not described, and no price is published.

Line up Onyx and Sun with others Run the finder