What do Archipelo and Prompt Security sell?

Archipelo sells Salmon. Prompt Security sells Prompt Fuzzer.

Are Archipelo and Prompt Security in the same category?

They share AI model and agent security. Archipelo's primary category is Software supply chain security and Prompt Security's is AI firewalls and guardrails.

When were Archipelo and Prompt Security founded?

Prompt Security was founded in 2023.

Who owns Archipelo and Prompt Security?

Prompt Security is owned by SentinelOne, since 2025.

Who are Archipelo and Prompt Security sold to?

From its own pages, Archipelo's Salmon addresses software in which autonomous agents, tools, runtimes, and controllers perform consequential actions.

Vendor comparison · 2 companies

Archipelo vs Prompt Security

Archipelo develops Salmon, Execution Verification Infrastructure for establishing cryptographically verifiable execution history and state lineage. Prompt Security offers protection for both employee use of AI tools and the apps an organization builds. CISO Tribune files both under AI model and agent security. This page sets the two records side by side: what each sells, where it is based, who owns and funds it, the customers it names and its recent news, each fact numbered to its source.

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Archipelo vs Prompt Security: Products, Customers and Funding Compared
What it sells
	ArchipeloArchipelo develops Salmon, Execution Verification Infrastructure for establishing cryptographically verifiable execution history and state lineage.archipelo.com	Prompt SecurityPrompt Security offers protection for both employee use of AI tools and the apps an organization builds.prompt.security
What it sells	Salmon^{[1][2][3][4][5]}Execution Verification Infrastructure for establishing cryptographically verifiable execution history and state lineage.	Prompt Fuzzer^[4]An open source tool for AI vulnerability assessment.
Categories
Categories	Software supply chain security (primary category) AI model and agent security Insider risk management	AI firewalls and guardrails (primary category) Workforce AI usage security AI model and agent security
Headquarters
Headquarters	Not stated on its pages	Not stated on its pages
Founded
Founded	Not stated on its pages	2023^[1]
Ownership and funding
Ownership and funding	Not stated on its pages	Owned by SentinelOne since 2025^{[3][7][8][10]}
Named customers
Named customers	Not stated on its pages	Not stated on its pages
Recent news
Recent news	Not stated on its pages	Not stated on its pages
G2 and Gartner Peer Insights
G2 and Gartner Peer Insights	G2: Not stated on its pages Gartner Peer Insights: Not stated on its pages	G2: listed, seen November 10, 2026^[10] Gartner Peer Insights: Not stated on its pages
Who it fits
Who it fits	From its own pages, Archipelo's Salmon addresses software in which autonomous agents, tools, runtimes, and controllers perform consequential actions. Archipelo describes incident investigation teams as needing to work backward from a consequential state change toward the execution associated with it. Archipelo names systems that investigate, evaluate, govern, and depend upon execution as the systems for which verifiable execution history matters.	Not written yet
Last verified
Last verified	September 30, 2026	September 27, 2026

Where they overlap

Archipelo and Prompt Security are both filed under AI model and agent security.

Where they differ, field by field

Archipelo's primary category is Software supply chain security; Prompt Security's is AI firewalls and guardrails.
Archipelo is also filed under Insider risk management. Prompt Security is also filed under Workforce AI usage security.
Archipelo lists Salmon. Prompt Security lists Prompt Fuzzer.
Prompt Security was founded in 2023.
Prompt Security is owned by SentinelOne, since 2025.

What it sells: Archipelo

What Salmon does^{[1][2][3][4][5]}: Salmon is Execution Verification Infrastructure for establishing cryptographically verifiable execution history and state lineage. Execution is represented as a cryptographically signed event with explicit context. Salmon captures execution as it occurs upstream within supported environments.

What it sells: Prompt Security

What Prompt Fuzzer does^[4]: Prompt Fuzzer is listed under AI Security Tools on the Prompt Security site. The site describes it as an open source tool for AI vulnerability assessment.

Questions about Archipelo and Prompt Security

What do Archipelo and Prompt Security sell?: Archipelo sells Salmon. Prompt Security sells Prompt Fuzzer.
Are Archipelo and Prompt Security in the same category?: They share AI model and agent security. Archipelo's primary category is Software supply chain security and Prompt Security's is AI firewalls and guardrails.
When were Archipelo and Prompt Security founded?: Prompt Security was founded in 2023.
Who owns Archipelo and Prompt Security?: Prompt Security is owned by SentinelOne, since 2025.
Who are Archipelo and Prompt Security sold to?: From its own pages, Archipelo's Salmon addresses software in which autonomous agents, tools, runtimes, and controllers perform consequential actions.

About Archipelo

Archipelo develops Salmon, Execution Verification Infrastructure for establishing cryptographically verifiable execution history and state lineage. Archipelo builds Salmon for autonomous multi-actor software systems. Archipelo, Inc. is the company developing and stewarding Salmon.^[1][3][4][5]

Archipelo states that autonomous agents, tools, runtimes, and controllers increasingly perform consequential actions themselves. Archipelo states that the resulting state alone cannot show which execution occurred, in what order, or how each state transition derived from the ones before it. Archipelo develops infrastructure that makes autonomous multi-actor software execution independently verifiable. Archipelo states that safe and reliable agents need verifiable evidence of their execution history.^[4][5]

Archipelo points to Git as showing the value of persistent, linked source code history. Archipelo says Execution Verification Infrastructure addresses a different problem, which is establishing a verifiable record of state transitions and the resulting state.

Archipelo describes execution as represented by a cryptographically signed event with explicit context. Archipelo states that Salmon captures execution as it occurs upstream within supported environments, not downstream after the event has already taken place. Archipelo states that Salmon does not visually or structurally manufacture execution continuity when execution continuity has not been established.

Archipelo states that agent generated changes can involve delegated execution, tools, subprocesses and multiple state transitions. Archipelo states that execution history provides a durable record of supported execution relationships to verify outcomes. Archipelo states that during incident investigation, teams need to work backward from a consequential state change toward the execution associated with it, to determine what caused the outcome.

One principle is that downstream systems should not be forced to establish execution history solely through retrospective inference where it can be captured during supported execution. Archipelo states that what an actor was permitted or instructed to do is distinct from what it actually executed. Archipelo states that machine-speed software systems require execution evidence that other software systems can consume and verify. Archipelo describes identity, policy, observability, security, engineering, and governance systems as solving adjacent problems.^[5]

Archipelo describes itself as a deep tech company building foundational infrastructure for verifiable autonomous systems.^[1][3][4][5]

Archipelo on the record

About Prompt Security

Prompt Security offers protection for both employee use of AI tools and the apps an organization builds. Prompt Security continuously tracks prompts per day in organizations of 500 to 1,000 employees.^[4][5]

Prompt Security holds that securing agentic AI is fundamentally different from securing traditional software. Prompt Security states that agents act autonomously, call tools and reason over untrusted input, so prompt injection, identity and runtime behavior have to be governed in real time and not only at the perimeter.

Prompt Security provides a security skill suite for OpenClaw, NanoClaw and Hermes agents.^[6]

Prompt Security provides a tool that tracks and analyzes OpenClaw deployments across an organization. Prompt Security provides a tool that tests and hardens a system prompt against dynamic LLM-based attacks.^[4][9]

Prompt Security publishes news, research, tools and analysis for security teams responding to AI threats. Prompt Security describes an AI gateway as a centralized layer between an organization's users or applications and the AI models or services they call. An AI gateway, as Prompt Security describes it, lets security teams monitor, control and secure that traffic from one place instead of instrumenting every application separately.^[4]

Prompt Security curates an interactive, continuously updated directory of 471 companies building security for agentic AI, organized across 14 functional categories. Both pure-play startups and dedicated AI-security lines from larger vendors are in scope for the Prompt Security directory. Entries in the Prompt Security directory are compiled from vendor websites, product documentation, funding announcements, public company registries and analyst coverage. Placement in the Prompt Security directory reflects publicly stated capabilities, not vendor marketing tiers. Category definitions and threat coverage in the Prompt Security directory are mapped against established, independent frameworks for AI and LLM security. The full dataset behind the Prompt Security directory is open and machine-readable.^{[2][4][5][6][9]}

Prompt Security on the record

Sources

Archipelo full record

[1]archipelo.comArchipelo · archipelo.com · undated page, accessed September 30, 2026 · Tier A
[2]Archipelo - Making Autonomous Software Execution VerifiableArchipelo · undated page, accessed October 30, 2026 · Tier A
[3]Terms of Service — SalmonArchipelo, Inc. · published September 20, 2026 · Tier A
[4]Archipelo - This page has been retiredArchipelo · undated page, accessed October 30, 2026 · Tier A
[5]About — SalmonArchipelo · undated page, accessed November 10, 2026 · Tier A

Prompt Security full record

[1]Prompt security partners with f5 to secure genai applications with a firewall for ai 302131373Prompt Security via PR Newswire · prnewswire.com · published April 30, 2024 · Tier A
[2]Securing ai promptSentinelOne · sentinelone.com · undated page, accessed September 27, 2026 · Tier A
[3]Sentinelone completes acquisition of prompt securitySentinelOne via The Globe and Mail · theglobeandmail.com · published September 5, 2025 · Tier A
[4]Prompt Security | From SentinelOnePrompt Security · undated page, accessed October 27, 2026 · Tier A
[5]AI Security | AI Glossary | Prompt SecurityPrompt Security · undated page, accessed October 27, 2026 · Tier A
[6]ClawSec: A Security Skill Suite for OpenClaw AgentsPrompt Security · undated page, accessed October 27, 2026 · Tier A
[7]AI Security Startups Map — Agentic AI Vendors by CategoryPrompt Security · undated page, accessed October 27, 2026 · Tier A
[8]About this Map & Methodology — AI Security Startups MapPrompt Security · undated page, accessed October 27, 2026 · Tier A
[9]OneClaw DashboardPrompt Security · undated page, accessed November 10, 2026 · Tier A
[10]Prompt Security Pros and Cons | User Likes & DislikesG2 · undated page, accessed November 10, 2026 · Tier C

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