CISO Tribune

Vendor comparison · 2 companies

Promptfoo vs Semgrep

Promptfoo builds open-source tools for secure, reliable AI applications. Semgrep sells an application security platform that unifies SAST, SCA, secrets scanning, and malware protection. CISO Tribune files both under Static application security testing. 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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  • Promptfoo
  • Semgrep
Promptfoo vs Semgrep: Products, Customers and Funding Compared
PromptfooPromptfoo builds open-source tools for secure, reliable AI applications.promptfoo.devSemgrepSemgrep sells an application security platform that unifies SAST, SCA, secrets scanning, and malware protection.semgrep.dev
What it sells
  • 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.
  • Semgrep Malware Firewall[11]Blocks malicious and compromised open-source packages on developer machines.
Categories
Headquarters
San Francisco, United States[1][3]San Francisco, United States[4]
Founded
2024[1][12]2017[2]
Ownership and funding
Owned by OpenAI[12]Privately held[3][5][7]
Named customers
Not stated on its pagesNot stated on its pages
Recent news
  • 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]
  • August 11, 2026Semgrep and Replit expanded their partnership so that Semgrep Guardian secrets scanning is built into the Replit Security Center.[6]
G2 and Gartner Peer Insights
  • G2: Not stated on its pages
  • Gartner Peer Insights: Not stated on its pages
  • G2: listed, seen November 3, 2026[7]
  • Gartner Peer Insights: Not stated on its pages
Who it fits
Not written yetFrom its own pages, Semgrep sells mainly to AppSec teams and the developers who write code. Semgrep describes helping AppSec teams focus on real risk and helping developers fix issues safely. Semgrep also describes use cases for organizations with sprawling, legacy-heavy codebases that hold large volumes of personal and financial data. Semgrep addresses organizations whose developers already generate code with AI. Semgrep describes connecting to source code management and continuous integration tools such as GitHub and GitLab.
Last verified
November 4, 2026September 27, 2026

Where they overlap

  • Promptfoo and Semgrep are both filed under Static application security testing.
  • Both are headquartered in San Francisco, United States.

Where they differ, field by field

  • Promptfoo's primary category is AI model and agent security; Semgrep's is Static application security testing.
  • Promptfoo is also filed under AI firewalls and guardrails and Breach simulation and automated pen-testing. Semgrep is also filed under Software composition analysis and Secrets detection.
  • Promptfoo lists Red Teaming and Evaluations. Semgrep lists Semgrep Malware Firewall.
  • Promptfoo was founded in 2024. Semgrep was founded in 2017.
  • Promptfoo is owned by OpenAI. Semgrep is privately held.

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.

What it sells: Semgrep

What Semgrep Malware Firewall does[11]
Semgrep Malware Firewall runs silently on developer machines, intercepting network requests to any public registry. It blocks malicious and compromised open-source packages from reaching the environment.

Questions about Promptfoo and Semgrep

What do Promptfoo and Semgrep sell?
Promptfoo sells Red Teaming and Evaluations. Semgrep sells Semgrep Malware Firewall.
Are Promptfoo and Semgrep in the same category?
They share Static application security testing. Promptfoo's primary category is AI model and agent security and Semgrep's is Static application security testing.
Where are Promptfoo and Semgrep headquartered?
Both are headquartered in San Francisco, United States.
When were Promptfoo and Semgrep founded?
Promptfoo was founded in 2024. Semgrep was founded in 2017.
Who owns Promptfoo and Semgrep?
Promptfoo is owned by OpenAI. Semgrep is privately held.
Who are Promptfoo and Semgrep sold to?
From its own pages, Semgrep sells mainly to AppSec teams and the developers who write code.
What have Promptfoo and Semgrep announced recently?
March 9, 2026: OpenAI agreed to buy Promptfoo, a startup helping businesses find and fix security issues in AI models during development. August 11, 2026: Semgrep and Replit expanded their partnership so that Semgrep Guardian secrets scanning is built into the Replit Security Center.

About Promptfoo

Promptfoo builds open-source tools for secure, reliable AI applications. Promptfoo is based in San Francisco, California, and is now part of OpenAI. Investors and operators backed Promptfoo early, and Promptfoo builds open-source, application-focused AI security.

Promptfoo's red teaming simulates real users to uncover application-specific vulnerabilities. Promptfoo creates thousands of context-aware attacks tailored to the customer's application. Promptfoo says its tests understand business logic, RAG, agents and integrations, and cover 50+ vulnerability types from injection to jailbreaks.[4]

Promptfoo connects to AI apps, agents, and workflows. Promptfoo provides remediation guidance directly in pull requests and developer workflows. Promptfoo lets teams track remediation progress and get suggested steps for each issue.[4][5]

The Community version includes all core features for local testing, evaluation, and vulnerability scanning. The open-source Community version includes up to 10k probes per month at no charge. Enterprise customers can purchase additional probes for larger scale testing. Enterprise pricing is customized based on a team's size and needs.[5]

Promptfoo lets customers manage LLM applications with teams-based access control and SSO, granular permission profiles, and customizable API access. Promptfoo provides real-time alerts and automated evaluations to show LLM security status across all projects. Promptfoo supports customizable plugin collections, scan configurations, and target settings that can be shared among colleagues.[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's application-level jailbreak creation can be integrated with Burp Suite's Intruder feature for security testing of LLM-powered applications. Promptfoo can import eval test cases directly from Microsoft SharePoint CSV files using certificate-based authentication with Azure AD. Promptfoo configurations can reference prompts managed in Langfuse.[6][7][8][9][10]

Promptfoo offers real estate plugins that test every AI touchpoint, from property search to lending to advertising, across all 7 federally protected classes. Promptfoo tests AVM and appraisal AI for demographic correlation in valuations. Promptfoo's real estate testing covers home search assistants, neighborhood recommendation engines, property matching tools, and school district comparison features. Promptfoo's real estate testing can run entirely within a customer's infrastructure, with no applicant or transaction data leaving the environment. Promptfoo integrates with CI/CD pipelines to catch fair housing regressions before deployment. Promptfoo generates structured reports that map directly to Fair Housing Act and ECOA requirements.[11]

Promptfoo says its contributors are from companies like OpenAI, Google, Microsoft, and Amazon.[2][4][5][6][11]

Promptfoo on the record

Sources

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

Semgrep full record

  1. [1]semgrep.devSemgrep · semgrep.dev · undated page, accessed September 27, 2026 · Tier A
  2. [2]AboutSemgrep · semgrep.dev · undated page, accessed September 27, 2026 · Tier A
  3. [3]Semgrep announces 100m series d funding to advance ai powered code security 302367780Semgrep via PR Newswire · prnewswire.com · published February 5, 2025 · Tier A
  4. [4]LocationsCraft.co · craft.co · undated page, accessed September 27, 2026 · Tier C
  5. [5]Semgrep App Security Platform | AI-assisted SAST, SCA and Secrets DetectionSemgrep · undated page, accessed October 28, 2026 · Tier A
  6. [6]Semgrep and Replit Expand Integration to Keep Pace With AI-Generated Code at ScaleBusiness Wire · published August 11, 2026 · Tier A
  7. [7]Semgrep Reviews 2026: Details, Pricing, & Features - G2G2 · undated page, accessed October 28, 2026 · Tier C
  8. [8]Semgrep AppSec Platform | SemgrepSemgrep · undated page, accessed November 3, 2026 · Tier A
  9. [9]All scans in Semgrep Code now use Pro Engine (cross-function analysis + Pro-only languages) | SemgrepSemgrep · undated page, accessed November 3, 2026 · Tier A
  10. [10]In-app code snippets are now supported for cross-file dataflow traces | SemgrepSemgrep · undated page, accessed November 3, 2026 · Tier A
  11. [11]Protect Against Open-Source Malware Attacks | SemgrepSemgrep · undated page, accessed November 3, 2026 · Tier A
  12. [12]Get a Slack alert when a supply chain incident affects your dependencies | SemgrepSemgrep · undated page, accessed November 3, 2026 · Tier A
  13. [13]Semgrep Guardian | SemgrepSemgrep · undated page, accessed November 3, 2026 · Tier A
  14. [14]Semgrep Agentic Workflows—Scale AppSec with Semgrep and AI agents | SemgrepSemgrep · undated page, accessed November 3, 2026 · Tier A
  15. [15]Run Semgrep Assistant on selected findings (auto-triage, auto-fix, component tagging) | SemgrepSemgrep · undated page, accessed November 3, 2026 · Tier A
  16. [16]Secure Guardrails | SemgrepSemgrep · undated page, accessed November 3, 2026 · Tier A
  17. [17]New insight into backlogs, developer engagement, and security posture | SemgrepSemgrep · undated page, accessed November 3, 2026 · Tier A
  18. [18]Filter by "project tag" | SemgrepSemgrep · undated page, accessed November 3, 2026 · Tier A

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