CISO Tribune

Vendor comparison · 2 companies

C1.ai vs Prompt Security

C1.ai gives agents policy-controlled access to models, tools, and credentials at runtime. 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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Up to four companies side by side.

  • C1.ai
  • Prompt Security
C1.ai vs Prompt Security: Products, Customers and Funding Compared
C1.aiC1.ai gives agents policy-controlled access to models, tools, and credentials at runtime.c1.aiPrompt SecurityPrompt Security offers protection for both employee use of AI tools and the apps an organization builds.prompt.security
What it sells
  • AI-Native Identity Governance[1][2]Automates lifecycle, access requests, reviews, and compliance for human and non-human identities.
  • NHI & Identity Security[1][2]Discovers and alerts on identity and non-human identity risks across the workforce and agents.
  • Agent SSO & Runtime Governance[1][2]Enforces runtime guardrails and access controls for AI agents, with human-in-the-loop approval.
  • Apps & MCP Self Service[1][2]Provides on-demand self-service access to approved apps, MCPs, and AI tools.
  • Deploy Custom Agents[1][2]Lets organizations run autonomous agents across connected systems with guardrails.
  • Shadow AI Discovery[1][2]Finds unsanctioned AI tools, agents, MCP servers, and credentials in use.
  • Prompt Fuzzer[4]An open source tool for AI vulnerability assessment.
Categories
Headquarters
Not stated on its pagesNot stated on its pages
Founded
Not stated on its pages2023[1]
Ownership and funding
Not stated on its pagesOwned by SentinelOne since 2025[3][7][8][10]
Named customers
Not stated on its pagesNot stated on its pages
Recent news
  • October 13, 2026Workday announced it has signed a definitive agreement to acquire C1.ai, with the transaction expected to close in the fourth quarter of Workday's fiscal year 2027, ending January 31, 2027.[9]
Not stated on its pages
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
From its own pages, C1.ai sells to organisations that manage access for people, non-human identities, and agents, and to technical teams that extend the platform through APIs and Terraform. The pages describe governed access for infrastructure teams through the tools they already use. The pages cover on-premises technology such as Active Directory and back-office apps. A named energy-sector customer sought an identity governance solution after an external auditor recommended one to streamline user access reviews.Not written yet
Last verified
November 2, 2026September 27, 2026

Where they overlap

  • C1.ai and Prompt Security are both filed under AI model and agent security.

Where they differ, field by field

  • C1.ai's primary category is Identity governance and administration; Prompt Security's is AI firewalls and guardrails.
  • C1.ai is also filed under Non-human identity security and Privileged access management. Prompt Security is also filed under Workforce AI usage security.
  • C1.ai lists AI-Native Identity Governance, NHI & Identity Security, Agent SSO & Runtime Governance, Apps & MCP Self Service, Deploy Custom Agents and 1 more. Prompt Security lists Prompt Fuzzer.
  • Prompt Security was founded in 2023.
  • Prompt Security is owned by SentinelOne, since 2025.

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 C1.ai and Prompt Security

What do C1.ai and Prompt Security sell?
C1.ai sells AI-Native Identity Governance, NHI & Identity Security, Agent SSO & Runtime Governance, Apps & MCP Self Service, Deploy Custom Agents and 1 more. Prompt Security sells Prompt Fuzzer.
Are C1.ai and Prompt Security in the same category?
They share AI model and agent security. C1.ai's primary category is Identity governance and administration and Prompt Security's is AI firewalls and guardrails.
When were C1.ai and Prompt Security founded?
Prompt Security was founded in 2023.
Who owns C1.ai and Prompt Security?
Prompt Security is owned by SentinelOne, since 2025.
Who are C1.ai and Prompt Security sold to?
From its own pages, C1.ai sells to organisations that manage access for people, non-human identities, and agents, and to technical teams that extend the platform through APIs and Terraform.
What have C1.ai and Prompt Security announced recently?
October 13, 2026: Workday announced it has signed a definitive agreement to acquire C1.ai, with the transaction expected to close in the fourth quarter of Workday's fiscal year 2027, ending January 31, 2027.

About C1.ai

C1.ai gives agents policy-controlled access to models, tools, and credentials at runtime. C1 Agents complete multi-step jobs across connected systems, with human approval for sensitive changes. C1.ai connects to SaaS, cloud infra providers, on-prem systems, and MCP servers.[2]

On the governance side, C1.ai turns HR and directory events into day-one account and access changes across supported systems. C1.ai provisions users the access they need based on conditions and policy. C1.ai applies policy-based provisioning and routing to any connected system. C1.ai covers user access reviews and separation-of-duties (SoD) conflict detection. C1.ai gives people and agents self-service access to approved applications and AI tools, with policy applied before fulfillment.[1][2][3]

For self-service, C1.ai makes approved apps, MCP servers, AI tools, roles, and permissions discoverable from one catalog. People and agents can request access from the web, Slack, Microsoft Teams, MCP, API, or CLI. C1.ai auto-approves routine access and routes sensitive requests using identity, role, resource, and risk context. C1.ai expires just-in-time access automatically so temporary permissions do not become standing access.[4]

For cloud infrastructure, C1.ai provides engineers and agents with precisely scoped cloud access. C1.ai reads cloud providers' resource trees, preserving the parent-child relationships each platform uses natively. C1.ai resolves inherited permissions in real time. C1.ai provisions, adjusts, and revokes access automatically as roles change, teams shift, or agents are redeployed.

Every action in the console is available via API, and C1.ai operates as an MCP server. C1.ai governs human, service, workload, and AI agent identities from one control plane. C1.ai logs every action with full context: subject, actor, delegation chain, purpose, resource, policy, and outcome. C1.ai supports policies as Terraform, AI-written CEL and functions, and validation via API. Technical teams extend C1.ai with APIs, custom functions, CLI, webhooks, and an AI integration builder, and manage it with Terraform.[2][6]

C1.ai includes 300+ connectors, built on Baton, which is open source under Apache 2.0, that integrate IdPs, directories, SaaS apps, cloud infrastructure, and on-prem systems into one identity graph. The connectors can be hosted or self-hosted. The identity graph ingests identity, permission, and resource data from all of your systems. C1.ai visualizes access paths for users, non-human identities, applications, and resources. C1.ai addresses access risks such as orphaned accounts, inactive users, and high-risk users. C1.ai offers built-in remediation options such as downgrading access, offboarding accounts, and securing service accounts. C1.ai connects to non-cloud infrastructure, including LDAP, Postgres, and Microsoft SQL. C1.ai covers on-premises technology such as Active Directory and homegrown and back-office apps.[1][6][7]

IGS Energy started looking for a partner after an external auditor recommended an identity governance solution to streamline user access reviews.[1][2][8]

C1.ai on the record

Sources

C1.ai full record

  1. [1]conductorone.comConductorOne (C1.ai) · conductorone.com · undated page, accessed November 2, 2026 · Tier A
  2. [2]C1.ai | Put AI to WorkC1.ai · undated page, accessed November 10, 2026 · Tier A
  3. [3]AI-Native Identity Governance Solutions | C1.aiC1.ai · undated page, accessed November 10, 2026 · Tier A
  4. [4]Self-Service Access for Apps, MCPs, and AI Tools | C1.aiC1.ai · undated page, accessed November 10, 2026 · Tier A
  5. [5]Infrastructure Access - C1.aiC1.ai · undated page, accessed November 10, 2026 · Tier A
  6. [6]Headless Identity Infrastructure | C1.aiC1.ai · undated page, accessed November 10, 2026 · Tier A
  7. [7]Identity Graph - C1.aiC1.ai · undated page, accessed November 10, 2026 · Tier A
  8. [8]Automating access management and reducing risk for IGS Energy’s hybrid environment | C1.aiC1.ai · undated page, accessed November 10, 2026 · Tier A
  9. [9]Workday to Acquire C1.ai, a Leading Agentic Identity Platform for People and AgentsC1.ai · published October 13, 2026 · Tier A

Prompt Security full record

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

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