CISO Tribune

Vendor comparison · 2 companies

Asymptote Labs vs Promptfoo

Asymptote Labs sells a runtime data platform for AI agents. Promptfoo builds open-source tools for secure, reliable AI applications. 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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  • Asymptote Labs
  • Promptfoo
Asymptote Labs vs Promptfoo: Products, Customers and Funding Compared
Asymptote LabsAsymptote Labs sells a runtime data platform for AI agents.asymptotelabs.aiPromptfooPromptfoo builds open-source tools for secure, reliable AI applications.promptfoo.dev
What it sells
  • Agent Beacon[2][3][4]An open-source telemetry layer for capturing and normalizing agent activity across every environment.
  • Asymptote Platform[4]A managed runtime data platform for operating AI agents across the organization.
  • Asymptote Guard[7][9]Controls that steer behavior, block actions inline, revoke access, contain sessions, or terminate agents.
  • Red Teaming[2][4][5]Simulates real users to uncover application-specific vulnerabilities.
  • Evaluations[2][5]LLM evaluation of prompts and models that can run inside CI workflows.
Categories
Headquarters
New York City, United States[2]San Francisco, United States[1][3]
Founded
Not stated on its pages2024[1][12]
Ownership and funding
Privately heldOwned by OpenAI[12]
Named customers
Not stated on its pagesNot stated on its pages
Recent news
  • October 20, 2026Asymptote Labs announced an oversubscribed $5.5 million seed round led by Tower Research Ventures.[12]
  • March 9, 2026OpenAI agreed to buy Promptfoo, a startup helping businesses find and fix security issues in AI models during development.[13]
  • March 9, 2026OpenAI announced it has acquired Promptfoo, an AI security startup founded in 2024 to protect LLMs from adversarial attacks.[12]
G2 and Gartner Peer Insights
  • G2: Not stated on its pages
  • Gartner Peer Insights: Not stated on its pages
  • G2: Not stated on its pages
  • Gartner Peer Insights: Not stated on its pages
Who it fits
Not written yetNot written yet
Last verified
October 21, 2026November 4, 2026

Where they overlap

  • AI model and agent security is the primary category of both Asymptote Labs and Promptfoo.
  • Both are headquartered in the United States.

Where they differ, field by field

  • Asymptote Labs is also filed under AI governance and Workforce AI usage security. Promptfoo is also filed under AI firewalls and guardrails, Static application security testing and Breach simulation and automated pen-testing.
  • Asymptote Labs lists Agent Beacon, Asymptote Platform and Asymptote Guard. Promptfoo lists Red Teaming and Evaluations.
  • Asymptote Labs is headquartered in New York City, United States. Promptfoo is headquartered in San Francisco, United States.
  • Promptfoo was founded in 2024.
  • Asymptote Labs is privately held. Promptfoo is owned by OpenAI.

How they differ

Asymptote Labs sells Agent Beacon, an open-source telemetry layer, Asymptote Platform, a managed runtime data platform for operating AI agents, and Asymptote Guard, which blocks actions inline, revokes access, or terminates agents. Promptfoo sells Red Teaming, which simulates real users to uncover application-specific vulnerabilities, and Evaluations, which tests prompts and models and can run inside CI workflows. In short, Asymptote Labs centers on agent activity at runtime, while Promptfoo centers on testing AI applications for vulnerabilities.

Agent Beacon captures activity across 20+ agent harnesses including Claude Code, Cursor, Codex, and OpenClaw, and forwards normalized telemetry to Splunk, Datadog, CrowdStrike, and other systems. Promptfoo's evaluations can be integrated into a CircleCI pipeline and used with test frameworks like Jest and Vitest. Promptfoo's open-source Community version includes up to 10k probes per month at no charge.

Asymptote Labs is headquartered in New York City, United States, and is privately held. On October 20, 2026, it announced an oversubscribed $5.5 million seed round led by Tower Research Ventures. Promptfoo is headquartered in San Francisco, United States, and was founded in 2024. It is owned by OpenAI, which announced on March 9, 2026 that it had acquired the company.

What it sells: Asymptote Labs

What Agent Beacon does[2][3][4]
Agent Beacon captures activity across 20+ agent harnesses including Claude Code, Cursor, Codex, and OpenClaw. Agent Beacon forwards normalized telemetry to Splunk, Datadog, CrowdStrike, and other existing systems. Agent Beacon stores a portable local activity record in JSONL.
What Asymptote Platform does[4]
Asymptote Platform is a managed runtime data platform for operating AI agents across the organization. Asymptote Platform includes managed ingest, retention, search, and analytics. Asymptote Platform includes fleet-wide agent inventory and usage visibility.
What Asymptote Guard does[7][9]
Asymptote Guard steers behavior, blocks actions inline, revokes access, contains sessions, or terminates agents when needed. Asymptote Guard enforces model, budget, and session-level controls so teams can limit expensive usage, stop runaway workflows, and keep AI spend within policy.

What it sells: Promptfoo

What Red Teaming does[2][4][5]
Promptfoo creates thousands of context-aware attacks tailored to the customer's application. The open-source Community version includes up to 10k probes per month at no charge.
What Evaluations does[2][5]
Promptfoo's LLM evaluation can be integrated into a CircleCI pipeline. Promptfoo can be integrated with test frameworks like Jest and Vitest to evaluate prompts as part of existing testing and CI workflows. Promptfoo provides real-time alerts and automated evaluations to show LLM security status across all projects.

Questions about Asymptote Labs and Promptfoo

What do Asymptote Labs and Promptfoo sell?
Asymptote Labs sells Agent Beacon, Asymptote Platform and Asymptote Guard. Promptfoo sells Red Teaming and Evaluations.
Are Asymptote Labs and Promptfoo in the same category?
Yes. AI model and agent security is the primary category of both on CISO Tribune.
Where are Asymptote Labs and Promptfoo headquartered?
Asymptote Labs is headquartered in New York City, United States. Promptfoo is headquartered in San Francisco, United States.
When were Asymptote Labs and Promptfoo founded?
Promptfoo was founded in 2024.
Who owns Asymptote Labs and Promptfoo?
Asymptote Labs is privately held. Promptfoo is owned by OpenAI.
What have Asymptote Labs and Promptfoo announced recently?
October 20, 2026: Asymptote Labs announced an oversubscribed $5.5 million seed round led by Tower Research Ventures. March 9, 2026: OpenAI agreed to buy Promptfoo, a startup helping businesses find and fix security issues in AI models during development.

About Asymptote Labs

Asymptote Labs sells a runtime data platform for AI agents. Asymptote gives teams one place to understand agent activity, investigate behavior, enforce controls, and analyze usage across tools and environments. Asymptote provides enterprise security and engineering teams a unified AI telemetry layer to see what agents are doing, govern how they operate, and continuously improve them over time.[3]

Asymptote says agents are spreading across tools and teams faster than organizations can track them. Asymptote says agents can access data and take actions without enough real-time oversight or control. Asymptote says teams can't see which agents are effective, failing, or wasting spend.[3]

Beacon is the open-source part of the offering. Asymptote is powered by Beacon, an open-source telemetry layer for capturing and normalizing agent activity across every environment. Agent Beacon is the open-source telemetry foundation, and the Asymptote platform builds on it with the managed control enterprises need to govern agent activity at scale. Agent Beacon captures activity across 20+ agent harnesses including Claude Code, Cursor, Codex, and OpenClaw. Agent Beacon forwards normalized telemetry to Splunk, Datadog, CrowdStrike, and other existing systems. Agent Beacon stores a portable local activity record in JSONL. Beacon gives Security and IT teams local endpoint visibility into supported agent harnesses. Beacon normalizes captured activity into a stable endpoint event schema and writes JSONL for local inspection or customer-managed forwarding.[3][4][5]

Beacon is deployed to endpoints in several ways. Asymptote deploys Beacon across endpoints with Jamf, Fleet, and other MDM workflows. Beacon macOS deployment uses a signed and notarized package distributed through Jamf Pro, Fleet, or another MDM. On Linux, the Beacon collector runs as a systemd service. Beacon browser chat telemetry is limited to the Claude.ai and ChatGPT conversation streams captured by the optional Agent Beacon browser extension.[4][5][6][10]

Asymptote Platform is the managed layer. Asymptote Platform is a managed runtime data platform for operating AI agents across the organization. Asymptote Platform includes managed ingest, retention, search, and analytics. Asymptote Platform includes fleet-wide agent inventory and usage visibility. Asymptote captures prompts, tool calls, file edits, approvals, and runtime events. Asymptote inventories Claude Code, Codex, Cursor, and other agent harnesses. Asymptote normalizes activity into one consistent source of agent runtime data.[3][4]

Asymptote builds a complete inventory of agents and the environments they run in across an organization. Asymptote detects malicious and suspicious agent behavior in real time, with the full execution context needed to understand what happened. Asymptote surfaces threats like secret access, prompt injection, malicious tool use, suspicious commands, and data exfiltration across the complete agent session. Asymptote Guard steers behavior, blocks actions inline, revokes access, contains sessions, or terminates agents when needed. Asymptote adds visibility into the agent runtime, including the harness, prompt context, tool calls, resources accessed, and policy decisions behind each action.[1][7]

Asymptote correlates every action in an agent session so engineers can pinpoint failed commands, retries, tool errors, slow steps, and execution loops. Asymptote lets engineering teams understand which agents, models, and workflows developers rely on across the organization. Asymptote connects model spend to the teams, agents, users, and workflows that generated it. Asymptote adds runtime context, connecting AI spend to specific users, agents, repositories, sessions, and workflows. Asymptote Guard enforces model, budget, and session-level controls so teams can limit expensive usage, stop runaway workflows, and keep AI spend within policy.[8][9]

Asymptote can be self-hosted in AWS, Azure, or GCP for tighter control over infrastructure, networking, and data residency. Asymptote offers dedicated infrastructure for organizations that need tighter control over how agent data is stored and operated. Asymptote integrates with providers like Okta for secure access without additional passwords. Asymptote protects data with AES-256 for storage and backups and TLS 1.2+ for all data in transit. Asymptote enforces zero-day retention with providers such as OpenAI and Anthropic, ensuring customer data is not stored or used for training. Asymptote connects to the tools teams already use and extends with custom actions for workflows and systems unique to a business.[4][10][11]

Asymptote Labs on the record

Sources

Asymptote Labs full record

  1. [1]asymptotelabs.aiAsymptote Labs · asymptotelabs.ai · undated page, accessed October 21, 2026 · Tier A
  2. [2]Asymptote labs raises 5 5m seed roundAsymptote Labs · asymptotelabs.ai · published October 20, 2026 · Tier A
  3. [3]Asymptote: Real-time Visibility & Control for AI AgentsAsymptote Labs · undated page, accessed November 10, 2026 · Tier A
  4. [4]PricingAsymptote Labs · undated page, accessed November 10, 2026 · Tier A
  5. [5]Security & IT Rollout Guide - AsymptoteAsymptote Labs · undated page, accessed November 10, 2026 · Tier A
  6. [6]Linux Install - AsymptoteAsymptote Labs · undated page, accessed November 10, 2026 · Tier A
  7. [7]Asymptote For Security & ITAsymptote Labs · undated page, accessed November 10, 2026 · Tier A
  8. [8]Asymptote For EngineeringAsymptote Labs · undated page, accessed November 10, 2026 · Tier A
  9. [9]Asymptote For AI FinOpsAsymptote Labs · undated page, accessed November 10, 2026 · Tier A
  10. [10]SecurityAsymptote Labs · undated page, accessed November 10, 2026 · Tier A
  11. [11]IntegrationsAsymptote Labs · undated page, accessed November 10, 2026 · Tier A
  12. [12]Asymptote Labs Raises $5.5M to Build Runtime Infrastructure for AI Agents | AsymptoteAsymptote Labs · published October 20, 2026 · Tier A

Promptfoo full record

  1. [1]PressPromptfoo · promptfoo.dev · undated page, accessed November 4, 2026 · Tier A
  2. [2]promptfoo.devPromptfoo · promptfoo.dev · undated page, accessed November 4, 2026 · Tier A
  3. [3]About Promptfoo | AI Security Experts | PromptfooPromptfoo · undated page, accessed November 10, 2026 · Tier A
  4. [4]Build Secure AI Applications | PromptfooPromptfoo · undated page, accessed November 10, 2026 · Tier A
  5. [5]Pricing | PromptfooPromptfoo · undated page, accessed November 10, 2026 · Tier A
  6. [6]Setting up Promptfoo with CircleCI | PromptfooPromptfoo · undated page, accessed November 10, 2026 · Tier A
  7. [7]Testing prompts with Jest and Vitest | PromptfooPromptfoo · undated page, accessed November 10, 2026 · Tier A
  8. [8]Finding LLM Jailbreaks with Burp Suite | PromptfooPromptfoo · undated page, accessed November 10, 2026 · Tier A
  9. [9]SharePoint Integration | PromptfooPromptfoo · undated page, accessed November 10, 2026 · Tier A
  10. [10]Langfuse integration | PromptfooPromptfoo · undated page, accessed November 10, 2026 · Tier A
  11. [11]AI Security for Real Estate | PromptfooPromptfoo · undated page, accessed November 10, 2026 · Tier A
  12. [12]OpenAI acquires Promptfoo to secure its AI agents | TechCrunchTechCrunch · published March 9, 2026 · Tier B
  13. [13]OpenAI Buying AI Security Startup Promptfoo to Safeguard AI Agents - BloombergBloomberg · published March 9, 2026 · Tier B

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