CISO Tribune

Vendor comparison · 2 companies

Act Security vs Zero Networks

Act Security sells a cloud security platform that eliminates unnecessary access at the infrastructure layer. Zero Networks automatically creates and enforces least-privilege controls across every asset, identity, and connection. CISO Tribune files both under Microsegmentation. 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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  • Act Security
  • Zero Networks
Act Security vs Zero Networks: Products, Customers and Funding Compared
Act SecurityAct Security sells a cloud security platform that eliminates unnecessary access at the infrastructure layer.act.securityZero NetworksZero Networks automatically creates and enforces least-privilege controls across every asset, identity, and connection.zeronetworks.com
What it sells
  • Amphi[1][9]A free and open-source suite for managing cloud access policies.
  • Identity Segmentation[1][2][8]Zero restricts privileged account access to operational needs only to remove the risk of credential theft.
  • Secure Remote Access[1][2][5][7][12]Zero combines the speed of VPN with the security of ZTNA to connect remote employees and vendors.
  • RPC Firewall[2][10]RPC Firewall allows only legitimate and crucial RPC traffic and blocks unwarranted operations.
Categories
Headquarters
Not stated on its pagesIsrael[4]
Founded
Not stated on its pages2019[4]
Ownership and funding
Not stated on its pagesPrivately held[2][6][16]
Named customers
Not stated on its pagesNot stated on its pages
Recent news
Not stated on its pagesNot stated on its pages
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
Act Security's platform draws boundaries across multi-cloud environments. Organizations deploying AI agents and AI workloads in production are a stated focus, since Act enforces access boundaries around every AI workload. Act Security also addresses organizations that must meet requirements such as HIPAA and GDPR through access and data boundaries.The pages give little detail on buyers. They do not name customers, industries or organisation sizes the company serves. What is described are product and solution menu labels, not statements about who buys them. Based on what is available, no reliable fit description can be given.
Last verified
October 29, 2026November 9, 2026

Where they overlap

  • Act Security and Zero Networks are both filed under Microsegmentation.

Where they differ, field by field

  • Act Security's primary category is Cloud identity entitlements (CIEM); Zero Networks's is Microsegmentation.
  • Zero Networks is also filed under Zero trust network access.
  • Act Security lists Amphi. Zero Networks lists Identity Segmentation, Secure Remote Access and RPC Firewall.
  • Zero Networks is headquartered in Israel.
  • Zero Networks was founded in 2019.
  • Zero Networks is privately held.

What it sells: Act Security

What Amphi does[1][9]
Amphi builds on Cloud Copilot, an open-source AWS IAM tool that Act acquired earlier in the year. Amphi integrates with a team's existing workflows and requires no account or login. Amphi gives the infrastructure and platform engineers who run the cloud a way to manage access policies.

What it sells: Zero Networks

What Identity Segmentation does[1][2][8]
Zero restricts privileged account access to operational needs only to remove the risk of credential theft. Zero learns all logon activities, account behaviors, and asset access patterns to create automated policies based on legitimate behavior. Service, admin, and agent accounts are restricted to pre-approved assets and logon types, so lateral movement and unauthorized access are blocked even if credentials get stolen. Admins can only log on to pre-approved assets after MFA.
What Secure Remote Access does[1][2][5][7][12]
Zero combines the speed of VPN with the security of ZTNA to connect remote employees and vendors. Policies allow user access to all or pre-approved apps and services. Zero remote access enforces access controls, tracks user activity, creates audit trails, and enforces MFA user authentication.
What RPC Firewall does[2][10]
RPC Firewall allows only legitimate and crucial RPC traffic and blocks unwarranted operations. RPC Firewall addresses threats including lateral movement, remote code execution, internal discovery, and relay attacks. Domain Controllers, Certificate Authorities, and Federation Services are essential services covered by the solution.

Questions about Act Security and Zero Networks

What do Act Security and Zero Networks sell?
Act Security sells Amphi. Zero Networks sells Identity Segmentation, Secure Remote Access and RPC Firewall.
Are Act Security and Zero Networks in the same category?
They share Microsegmentation. Act Security's primary category is Cloud identity entitlements (CIEM) and Zero Networks's is Microsegmentation.
Where are Act Security and Zero Networks headquartered?
Zero Networks is headquartered in Israel.
When were Act Security and Zero Networks founded?
Zero Networks was founded in 2019.
Who owns Act Security and Zero Networks?
Zero Networks is privately held.
Who are Act Security and Zero Networks sold to?
Act Security's platform draws boundaries across multi-cloud environments. The pages give little detail on buyers.

About Act Security

Act Security sells a cloud security platform that eliminates unnecessary access at the infrastructure layer.[2][3]

Act describes the problem as AI-assisted development creating services, identities and agents faster than governance can review, while autonomous agents operate in production with real authority. Act Security is a Tel Aviv startup whose cloud security platform targets AI agents inheriting bloated cloud permissions. Act Security maps the full identity-to-agent-to-downstream chain across a customer's cloud and applies preventative controls.[7]

Act maps every cloud construct into boundaries that reflect how a business operates, by organization, environment, application or data. Act brings identity, network and AI access controls together into one unified access map. Act analyzes and enforces identity, network and AI access as a single model. Act examines access as configured and as observed. Configured access is everything current configuration allows to be reached and acted on, and observed access is what is actually being used to keep the business running.[2][5]

One campaign type uses broad explicit-deny policies that block entire attack categories, including unauthorized cross-environment movement, data exfiltration and external overexposure. Act simulates each recommended change before enforcement to show what it would block. Act lets teams test changes against a digital twin before enforcing them, and run changes in audit mode as long as needed to confirm no legitimate access is revoked. Act gives automated exception recommendations based on observed access and intent.[2]

Act enforces boundaries through a cloud's own native controls, using Infrastructure-as-Code, with no agents and no new infrastructure to maintain. Act deploys changes as pull requests to a customer's existing Infrastructure-as-Code, Terraform and CloudFormation, using the cloud-native controls the customer already owns. Act manages violations and exceptions directly in a customer's own tools. Act lets users request blocked access within their existing tools, so security can approve or deny it in one click. Act shows every policy change with the investigation already done, and supports rollback when needed.[2]

Act places six contextual boundaries across a cloud, continuously reducing attack paths as the environment evolves. Act rightsizes human access and removes standing privileged access. Act locks down access to production and management environments and keeps sandbox environments isolated from everything else. Act ring-fences each application, secures its data and compute, and blocks attackers from moving laterally between applications. Act contains endpoint AI agents, governs the infrastructure they run on, and ring-fences cloud AI agents so they cannot reach beyond their intended scope. Act isolates tenants to protect customer data, enforces geo-fencing for regulations like GDPR, and restricts access to regulated data. Act closes off unintended inbound access from outside an environment and eliminates the paths attackers use to exfiltrate data. Act enforces tightly defined access boundaries around every AI workload.[1][2][5]

Act Security's founders have years inside critical infrastructure and healthcare. Act Security's research team found that Azure's object replication, a normal feature for copying blobs between storage accounts, can be turned into a quiet data exfiltration or poisoning channel.[3][5]

Act Security released Amphi in September 2026, a free and open-source suite for managing cloud access policies. Amphi builds on Cloud Copilot, an open-source AWS IAM tool that Act acquired earlier in the year. Amphi integrates with a team's existing workflows and requires no account or login.[1][2][8]

Act Security on the record

Sources

Act Security full record

  1. [1]act.securityAct Security · act.security · undated page, accessed October 29, 2026 · Tier A
  2. [2]Platform | Act SecurityAct Security · undated page, accessed October 29, 2026 · Tier A
  3. [3]Black Hat USA 2026 | Act SecurityAct Security · undated page, accessed November 10, 2026 · Tier A
  4. [4]Act Security raises $60M and exits stealthAct Security · undated page, accessed November 10, 2026 · Tier A
  5. [5]Act SecurityAct Security · undated page, accessed November 10, 2026 · Tier A
  6. [6]About | Act SecurityAct Security · undated page, accessed November 10, 2026 · Tier A
  7. [7]Secure Your AI Agent's Full Access ChainAct Security · undated page, accessed November 10, 2026 · Tier A
  8. [8]Act: Proactive cloud securityAct Security · undated page, accessed November 10, 2026 · Tier A
  9. [9]Act Security press releaseAct Security · published October 8, 2026 · Tier A

Zero Networks full record

  1. [1]zeronetworks.comZero Networks · zeronetworks.com · undated page, accessed September 27, 2026 · Tier A
  2. [2]Dynamic Zero Trust Network Security for EnterprisesZero Networks · published June 11, 2026 · Tier A
  3. [3]Achieving five fold revenue growth zero networks raises 20m in series b to prevent attackers from spreading in corporate networks 302014520Zero Networks via PR Newswire · prnewswire.com · published December 13, 2023 · Tier A
  4. [4]Israeli cyber startup zero networks raises 55 million private funding 2025 06 03Reuters · reuters.com · published June 3, 2025 · Tier B
  5. [5]Zero Networks | The Leader in Microsegmentation and Zero Trust SecurityZero Networks · undated page, accessed October 30, 2026 · Tier A
  6. [6]Block Lateral Movement | Zero NetworksZero Networks · undated page, accessed October 30, 2026 · Tier A
  7. [7]Zero Networks in ActionZero Networks · undated page, accessed October 30, 2026 · Tier A
  8. [8]Achieve and Maintain Compliance | Zero NetworksZero Networks · undated page, accessed November 10, 2026 · Tier A
  9. [9]Secure Legacy Infrastructure | Zero NetworksZero Networks · undated page, accessed November 10, 2026 · Tier A
  10. [10]RPC Firewall | Zero NetworksZero Networks · undated page, accessed November 10, 2026 · Tier A
  11. [11]Identity Segmentation: Stop Account Abuse & Secure Admin AccessZero Networks · undated page, accessed November 10, 2026 · Tier A
  12. [12]Secure Remote Access | Zero NetworksZero Networks · undated page, accessed November 10, 2026 · Tier A
  13. [13]Secure OT Environments | Zero NetworksZero Networks · undated page, accessed November 10, 2026 · Tier A
  14. [14]Secure Kubernetes Environments | Zero NetworksZero Networks · undated page, accessed November 10, 2026 · Tier A
  15. [15]Accelerate AI Innovation | Zero NetworksZero Networks · undated page, accessed November 10, 2026 · Tier A
  16. [16]Merger and Acquisition Integration Risk | Zero NetworksZero Networks · undated page, accessed November 10, 2026 · Tier A
  17. [17]Build Preemptive Cyber Resilience | Zero NetworksZero Networks · undated page, accessed November 10, 2026 · Tier A

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