CISO Tribune

Vendor comparison · 2 companies

Fastly vs Impart Security

Fastly is an edge cloud platform that helps companies deliver fast, secure, and reliable digital experiences. Impart Security sells programmable, deterministic Layer 7 protection across AI, applications and APIs. CISO Tribune files both under Bot and abuse management. 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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  • Fastly
  • Impart Security
Fastly vs Impart Security: Products, Customers and Funding Compared
FastlyFastly is an edge cloud platform that helps companies deliver fast, secure, and reliable digital experiences.fastly.comImpart SecurityImpart Security sells programmable, deterministic Layer 7 protection across AI, applications and APIs.impart.ai
What it sells
  • Next-Gen WAF[2][9][11]A web application firewall that monitors suspicious and anomalous web traffic.
  • DDoS Protection[5][6][10]Real-time visibility into and defense against common DDoS attacks.
  • API Discovery[10]A continuously-updating record of incoming API requests.
  • Managed Security[5][11]24/7 expert-managed WAF, bot, and DDoS threat protection.
  • AI Runtime Control[7][12]A unified control plane between applications and AI models.
  • Managed CDN[5]Fastly's managed cloud CDN deployed inside the customer's own network.
  • Professional Services[5]Expert help to migrate or optimize a delivery service.
  • Agent Protection[3][10]Enforces application-specific policies on agent traffic and tool interactions.
  • API Security[5][8][10]Enforces controls based on how APIs behave across requests and sessions.
  • Runtime Defense Harness[10]Uses AI-assisted investigation to develop targeted virtual patches.
Categories
Headquarters
San Francisco, United States[4]San Francisco, United States
Founded
Not stated on its pagesNot stated on its pages
Ownership and funding
Public (NYSE: FSLY)[1][8]Privately held
Named customers
Not stated on its pagesNot stated on its pages
Recent news
  • September 28, 2026Comcast and Fastly are working with NBCUniversal to run Fastly delivery software on Comcast's network for live streaming events on Peacock.[18]
  • September 21, 2026Fastly announced AI Runtime Control, AI Firewall and new API Security capabilities aimed at giving organizations visibility and control across their AI systems.[7]
  • June 10, 2026Fastly and Skyfire announced a partnership under which Skyfire integrated its identity and payment-backed credentials into Fastly's edge cloud platform.[19]
Not stated on its pages
G2 and Gartner Peer Insights
  • G2: listed, seen November 3, 2026[8]
  • 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
From its own pages, Fastly sells mainly to developers, security teams, and digital businesses. Fastly says its security products protect applications, APIs, and microservices, wherever they live. Fastly says it powers media brands with an open edge cloud platform for live and on-demand entertainment. Fastly Next-Gen WAF can be deployed in three different ways, including directly on customers' own web servers. Managed Security Professional is sold to customers that purchase Fastly Full-Site Delivery and Network Services Enterprise Support, along with either Next-Gen WAF or Edge Rate Limiting.Impart describes protection that runs inside an organisation's existing ingress. The stated coverage spans AI, applications and APIs. Impart also describes integrating its protection into existing ingress and egress infrastructure, with policies and runtime state synchronized across distributed environments.
Last verified
September 27, 2026September 27, 2026

Where they overlap

  • Fastly and Impart Security are both filed under Bot and abuse management.
  • Both are headquartered in San Francisco, United States.

Where they differ, field by field

  • Fastly's primary category is WAF and WAAP; Impart Security's is AI firewalls and guardrails.
  • Fastly is also filed under DDoS protection and API security. Impart Security is also filed under AI model and agent security.
  • Fastly lists Next-Gen WAF, DDoS Protection, API Discovery, Managed Security, AI Runtime Control and 2 more. Impart Security lists Agent Protection, API Security and Runtime Defense Harness.
  • Fastly is a public company listed on NYSE as FSLY. Impart Security is privately held.

What it sells: Fastly

What Next-Gen WAF does[2][9][11]
Fastly Next-Gen WAF protects, in real-time, against attacks directed at the applications and origin servers that customers specify. Next-Gen WAF can be deployed in three different ways. Next-Gen WAF continues to be powered by Signal Sciences technology.
What DDoS Protection does[5][6][10]
Fastly DDoS Protection provides real-time visibility into and defense against common Distributed Denial of Service (DDoS) attacks. Fastly describes it as keeping customers performant and available without any required configuration.
What Managed Security does[5][11]
Fastly describes Managed Security as 24/7 expert-managed WAF, bot, and DDoS threat protection. Managed Security Professional provides continuous monitoring of included Fastly security products and proactive action by Fastly in the event of an identified security incident. Managed Security Professional includes enhanced access to Fastly's Customer Security Operations Center (CSOC).
What AI Runtime Control does[7][12]
ARC is a unified control plane that sits between applications and AI models, giving centralized visibility, governance, and control over all AI traffic. AI Firewall is a security module within ARC that protects AI-powered applications from prompt injection attacks with near-zero latency impact.

What it sells: Impart Security

What Agent Protection does[3][10]
Agent Protection enforces application-specific policies on agent traffic and tool interactions, using runtime context to restrict unauthorized actions and access. Agent Protection runs on the same ingress-layer enforcement engine that inspects the full attack surface.
What API Security does[5][8][10]
API Security enforces controls based on how APIs behave across requests and sessions, not just individual request signatures. Impart applies inline, sequence-aware enforcement to every API call. API Security detects and blocks shadow APIs as they are accessed. API Security prevents sensitive data (PII) from leaving the system.
What Runtime Defense Harness does[10]
Runtime Defense Harness uses AI-assisted investigation to develop targeted virtual patches and deploy protection through the same engine already protecting the applications. Targeted virtual patches are generated and tested against runtime traffic, with Policy as Code validated before deployment. AI-generated virtual patches are informed by runtime behavior, tested against live traffic and enforced through programmable Layer 7 controls.

Questions about Fastly and Impart Security

What do Fastly and Impart Security sell?
Fastly sells Next-Gen WAF, DDoS Protection, API Discovery, Managed Security, AI Runtime Control and 2 more. Impart Security sells Agent Protection, API Security and Runtime Defense Harness.
Are Fastly and Impart Security in the same category?
They share Bot and abuse management. Fastly's primary category is WAF and WAAP and Impart Security's is AI firewalls and guardrails.
Where are Fastly and Impart Security headquartered?
Both are headquartered in San Francisco, United States.
Who owns Fastly and Impart Security?
Fastly is a public company listed on NYSE as FSLY. Impart Security is privately held.
Who are Fastly and Impart Security sold to?
From its own pages, Fastly sells mainly to developers, security teams, and digital businesses. Impart describes protection that runs inside an organisation's existing ingress.
What have Fastly and Impart Security announced recently?
September 28, 2026: Comcast and Fastly are working with NBCUniversal to run Fastly delivery software on Comcast's network for live streaming events on Peacock.

About Fastly

Fastly is an edge cloud platform that helps companies deliver fast, secure, and reliable digital experiences. Fastly combines CDN, security (including WAF and DDoS protection), and edge computing so teams can control how content and applications are delivered and protected in real-time. Fastly describes one programmable platform to scale AI systems, protect content from bots, and run the edge with natural language. Fastly describes Secure as protecting apps and APIs from AI-scale threats. Fastly says it powers millions of mission-critical applications in thousands of the world's most digitally-advanced companies.[3][5][6]

Fastly says its application security solutions are designed for security and resilience at global scale and help teams mitigate evolving threats and control bots. Fastly offers CDN for content delivery, WAF for application protection, DDoS mitigation, bot management, and edge compute solutions for running logic closer to users. Fastly says its products work together as a unified platform. Fastly refers to its global network as having 622 Tbps of capacity.[5][6]

Fastly Next-Gen WAF is a web application firewall that monitors for suspicious and anomalous web traffic and protects, in real-time, against attacks directed at the applications and origin servers that customers specify. Fastly Next-Gen WAF now collectively refers to the products previously known as the Signal Sciences Cloud WAF and Signal Sciences Next-Gen WAF. Fastly Next-Gen WAF continues to be powered by Signal Sciences technology. Next-Gen WAF identifies and tracks attacks across all of a customer's deployments and determines whether to flag the originating IP address as potentially problematic, rate limit the IP address or allow the request. Next-Gen WAF can be deployed in three different ways. The On-Prem WAF deployment consists of two components, the module and the agent. Cloud WAF deployment requires uploading a TLS certificate, adding an origin server using the Next-Gen WAF control panel, and updating DNS records. Next-Gen WAF customers receive threat intelligence through the Network Learning Exchange (NLX) feature, which adds a unique signal to information in the control panels.[9]

Fastly DDoS Protection provides real-time visibility into and defense against common Distributed Denial of Service (DDoS) attacks. Fastly Client-Side Protection provides the ability to inventory and control resources such as scripts, images, and fonts.[10]

Fastly describes Managed Security as 24/7 expert-managed WAF, bot, and DDoS threat protection. Managed Security Professional provides continuous monitoring of included Fastly security products and proactive action by Fastly in the event of an identified security incident. Managed Security Professional includes enhanced access to Fastly's Customer Security Operations Center (CSOC) and periodic consultation with a Designated Security Specialist. Managed Security Professional includes a quarterly report documenting events observed and actions taken, recommendations for configuration changes and maintenance, and product updates.[5][11]

ARC is a unified control plane that sits between applications and AI models, giving centralized visibility, governance, and control over all AI traffic. ARC replaces raw provider API keys with rotatable virtual keys and supports connecting to providers via federated SSO pass-through. ARC lets customers set a monthly dollar budget per virtual key, with a choice of hard-block or continue-serving once exhausted. AI Firewall is a security module within ARC that protects AI-powered applications from prompt injection attacks with near-zero latency impact. AI Firewall uses Fastly's SmartParse detection engine and custom guardrails to detect attacks like prompt injection and other LLM specific attacks.[12]

Fastly's cloud CDN accelerates the delivery of dynamic content and caches website content that is unpredictable and event-driven. Fastly's Compute platform helps customers compile custom code to WebAssembly and runs it at the Fastly edge. Deploying to a Compute service makes customer logic available across the Fastly network with a single deploy action. Fastly Object Storage is an Amazon S3-compatible large object storage solution. Fastly's Platform TLS product allows customers to programmatically manage certificates and keys for Transport Layer Security (TLS) using a web API. Origin Inspector provides a dataset and visualizations that offer real-time and historical visibility into responses delivered from origin servers to the Fastly Edge Cloud. Fastly says customers can configure the Fastly CDN service to cache and transmit protected health information (PHI) in keeping with Health Information Portability and Accountability Act (HIPAA) security requirements. Fastly describes Managed CDN as Fastly's managed cloud CDN deployed inside the customer's own network, and Professional Services as expert help to migrate or optimize a delivery service. Fastly describes itself as an ICANN-accredited domain registrar.[2][5][6][10][11][13][14][15][16][17]

Fastly on the record

Sources

Fastly full record

  1. [1]Fastly Announces Acquisition of GlitchFastly via Business Wire · businesswire.com · published May 19, 2022 · Tier A
  2. [2]Web application api protectionFastly · fastly.com · undated page, accessed September 27, 2026 · Tier A
  3. [3]SecureFastly · fastly.com · undated page, accessed September 27, 2026 · Tier A
  4. [4]Fsly 20241231Fastly, Inc. via SEC EDGAR (Form 10-K) · sec.gov · published February 25, 2025 · Tier A
  5. [5]Powering the best of the internet | FastlyFastly · undated page, accessed October 25, 2026 · Tier A
  6. [6]Fastly Edge Cloud Platform | FastlyFastly · undated page, accessed October 25, 2026 · Tier A
  7. [7]Fastly Launches AI Firewall and AI Runtime Control to Secure and Scale AIFastly, Inc. (Business Wire) · published September 21, 2026 · Tier A
  8. [8]Fastly Content Delivery Reviews 2026: Details, Pricing, & Features | G2G2 · undated page, accessed October 25, 2026 · Tier C
  9. [9]Fastly Next-Gen WAF | Fastly ProductsFastly · undated page, accessed November 3, 2026 · Tier A
  10. [10]Security | Fastly DocumentationFastly · undated page, accessed November 3, 2026 · Tier A
  11. [11]Managed Security Professional | Fastly ProductsFastly · undated page, accessed November 3, 2026 · Tier A
  12. [12]Fastly ARC | AI Runtime Control | FastlyFastly · undated page, accessed November 3, 2026 · Tier A
  13. [13]Compute | Fastly ProductsFastly · undated page, accessed November 3, 2026 · Tier A
  14. [14]Products | Fastly DocumentationFastly · undated page, accessed November 3, 2026 · Tier A
  15. [15]Platform TLS | Fastly ProductsFastly · undated page, accessed November 3, 2026 · Tier A
  16. [16]Origin Inspector | Fastly ProductsFastly · undated page, accessed November 3, 2026 · Tier A
  17. [17]Domain Research API | FastlyFastly · undated page, accessed November 3, 2026 · Tier A
  18. [18]Comcast and Fastly’s New Content Delivery Model Powers Highest Quality Experience for Peacock’s Biggest Live EventsFastly · published September 28, 2026 · Tier A
  19. [19]Fastly and Skyfire Partner to Enable Trusted Agentic Commerce with Verified Identity at the EdgeFastly · published June 10, 2026 · Tier A

Impart Security full record

  1. [1]impart.aiImpart Security · impart.ai · undated page, accessed September 27, 2026 · Tier A
  2. [2]impart.aiImpart Security · impart.ai · undated page, accessed September 27, 2026 · Tier A
  3. [3]Agent Protection - Control AI Agent Behavior | ImpartImpart Security · undated page, accessed September 27, 2026 · Tier A
  4. [4]AI Runtime Defense | Impart Security PlatformImpart Security · undated page, accessed October 25, 2026 · Tier A
  5. [5]LLM Protection | Deterministic Agent Controls | ImpartImpart Security · undated page, accessed October 25, 2026 · Tier A
  6. [6]MCP Protection | Runtime Control for MCP Layer | ImpartImpart Security · undated page, accessed October 25, 2026 · Tier A
  7. [7]WAF for the Agentic Era | Impart SecurityImpart Security · undated page, accessed October 25, 2026 · Tier A
  8. [8]API Security for the Agentic Era | Impart SecurityImpart Security · undated page, accessed October 25, 2026 · Tier A
  9. [9]Integrations with Impart Security | Impart Security Runtime ProtectionImpart Security · undated page, accessed November 10, 2026 · Tier A
  10. [10]Programmable Layer 7 Firewall | Impart SecurityImpart Security · undated page, accessed November 10, 2026 · Tier A

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