F5 Distributed Cloud Services vs The Fastly Next-Gen WAF (powered by Signal Sciences) comparison

F5 and Fastly are both solutions in the Web Application Firewall (WAF) category. F5 is ranked #19 with an average rating of 10.0, while Fastly is ranked #25 with an average rating of 7.3. Additionally, 100% of F5 users are willing to recommend the solution, compared to 60% of Fastly users who would recommend it.

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Executive Summary

We performed a comparison between F5 Distributed Cloud Services and The Fastly Next-Gen WAF (powered by Signal Sciences) based on real PeerSpot user reviews.

Find out in this report how the two Web Application Firewall (WAF) solutions compare in terms of features, pricing, service and support, easy of deployment, and ROI.

To learn more, read our detailed F5 Distributed Cloud Services vs. The Fastly Next-Gen WAF (powered by Signal Sciences) Report (Updated: December 2025).

Buyer's Guide

F5 Distributed Cloud Services vs. The Fastly Next-Gen WAF (powered by Signal Sciences)

December 2025

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Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:

Categories and Ranking

Cloudflare

Featured Reviews

Herb Angle

Owner at Hga consulting

Has helped manage client domains with streamlined access control and threat visibility

I don't know what areas could be improved with Cloudflare WAF; Cloudflare is constantly improving and adding features to their feature set. They're doing a good job, and as far as DNS and support for any domains that I create or my clients create, it's mandatory for me to make sure that they have Cloudflare as their DNS provider. The Cloudflare load balancing capability hasn't really helped in enhancing my website's uptime and resiliency because we don't really get that much traffic; it's mostly remote users, and web hosting is done by a web hosting service. It doesn't pay to try to host your own website.

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Filip Mikulik

IT Analyst at Atlas.cz, a.s.

Protects web applications with comprehensive security features

All features are valuable. In a multi-cloud or distributed cloud, there are many protection possibilities from data to web application or API protection, including bot mitigation. This is a comprehensive package for web application security. The main benefit is Web App Security, offering a complete security package from DDoS to web application firewall, API protection, and bot mitigation.

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reviewer2161107

Staff Engineer at a retailer with 1,001-5,000 employees

Room for improvement with user interface while competitive pricing impresses

It is managed through Infrastructure as Code, so all configurations can be managed in the code itself, which is beneficial. Because it uses rules, it is easy to set up, and we have many different sites where the configurations are straightforward. Though the UI is not very interactive, which is a downside, we can manage many things. The UI is not very intuitive and could be better. However, we manage all the configurations through code, which is easy to maintain. It has extensive anomaly detection capabilities, so the traffic is classified into several categories where thresholds can be defined and customized based on false positives and false negatives. This is advantageous because you do not need to tweak it very often. Once you set it up, an audit once a quarter would suffice. Because The Fastly Next-Gen WAF (powered by Signal Sciences) is API-driven, we have integrations with the CI/CD pipeline through GitHub Actions, making it easy to integrate.

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Quotes from Members

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:

Pros

"The DDoS protection is the most valuable aspect of the solution."

"The simplicity of the overall dashboard makes it a great product for a user like me who has less understanding of the internet than a developer or other more technical people. It gives me peace of mind. I also love the easy customization of the Page Rules."

"DDoS attacks target unprotected machines. Cloudflare detects and stops these attacks using internal systems. It identifies incoming DDoS attacks, issuing challenges or blocking them immediately."

"Even when there is a high load on our servers, Cloudflare is able to cache the data and serve it to users, ensuring they can still access the website."

"Cloudflare is a security SaaS provider that provides security and protects us from any application layer attack."

"Its ease of integration with Office 365 and the fact that it's a good product compared to what I had before"

"The web application firewall brought us good security and a view of the accesses/blocks of the entire domain and subdomain that were accessed both by region (country) and IPs."

"The most valuable feature of Cloudflare DNS is security."

More Cloudflare pros

"F5 is known for being the best load balancer in the market. Customers with an existing module can easily adopt additional modules without investing in new hardware."

"The main benefit is Web App Security, offering a complete security package from DDoS to web application firewall, API protection, and bot mitigation."

"In a multi-cloud or distributed cloud, there are many protection possibilities from data to web application or API protection, including bot mitigation."

"The product's most valuable feature is its ability to set up the rules easily."

"Fastly (Signal Sciences) integrates and tags the intermittent traffic based on patterns. It generates signals and provides them in a dashboard where we can view them and decide whether to allow or deny traffic. It's a more advanced and easy-to-navigate dashboard."

"When configuring a web application firewall using Signal Sciences, we configure a rule whereby no one except a few people can access the application."

"Because The Fastly Next-Gen WAF (powered by Signal Sciences) is API-driven, we have integrations with the CI/CD pipeline through GitHub Actions, making it easy to integrate."

Cons

"We are a product integrator and reseller, and we would like to have a better partner relationship, similar to a channel sales relationship. Sometimes we are on our own or get diverted by Cloudflare because they have direct sales, which competes with us and makes it difficult to build a relationship with this company since we want to be an MSP or a managed service provider for the solution."

"It should confirm audit findings of the assigned area with auditees to ensure that the audit conclusions are based on an accurate understanding of the issues."

"I believe they currently have this feature, but there will most likely be integration with APIs so we can control some features through API."

"DNS Management."

"If they improve on the placement of their data centers, it would be better. I'm living in a remote area. I would like to connect to them without any kind of lag."

"Cloudflare could be improved by introducing a mid-tier pricing option."

"For the free and Pro plans, Cloudflare could use a simple bot to provide information to users. This would improve support, especially for less advanced users who utilize the free components."

"Latencies are always a problem."

More Cloudflare cons

"The pricing could be adjusted to better meet the needs of typical customers in regions like Poland, where the product is considered too expensive."

"The main issue is integration with other parts or products of F5, like on-premise WAF."

"The main issue is integration with other parts or products of F5, like on-premise WAF. There are some problems, mainly from the perspective of implementation and customer expectations, which sometimes differ from reality."

"The areas that could be improved in Signal Sciences include the effectiveness of rules, as many didn't function optimally and required custom rule-writing to address bypasses for WAF."

"Fastly don't support caching for China users. That's the only feature lacking compared to Akamai."

"Even if we create some custom rules, Signal Sciences cannot capture some of the malicious traffic."

"The UI is not very intuitive and could be better."

Pricing and Cost Advice

"When you compare Cloudflare DNS to other solutions, such as Akamai, the price is reasonable."

"We are using the free version."

"The solution is expensive when compared to other products but offers unlimited bandwidth."

"The solution has many features but there are ones that you need to pay for. Sometimes you have to find out which is available for free and which you have to pay for."

"The pricing for the service is reasonable, neither excessively cheap nor prohibitively expensive. It aligns well with the value of their solution."

"I think the pricing is competitive. I think as far as licensing is concerned it's pretty straightforward because it's based on domain. It's just that sometimes domains could be tricky with some customers."

"The pricing depends on the usage, but the cheapest would be around 5,000 USD a month."

"It's a premium model. You can start at zero and work your way up to the enterprise model, which has a very high pricing level."

More Cloudflare pricing and cost advice

Information not available

"Signal Sciences is pretty cheap compared to other solutions."

"The product has an affordable cost."

"The pricing is 50% less than Akamai."

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Top Industries

By visitors reading reviews

Computer Software Company

12%

Financial Services Firm

10%

Comms Service Provider

10%

Manufacturing Company

Computer Software Company

14%

Financial Services Firm

11%

Insurance Company

Manufacturing Company

12%

Computer Software Company

12%

Retailer

10%

Financial Services Firm

10%

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	46
Midsize Enterprise	8
Large Enterprise	25

No data available

Questions from the Community

Which is the best DDoS protection solution for a big ISP for monitoring and mitigating?

Cloudflare. We are moving from Akamai prolexic to Cloudflare. Cloudflare anycast network outperforms Akamai static GR...

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Which would you choose - Cloudflare DNS or Quad9?

Cloudflare DNS is a very fast, very reliable public DNS resolver. It is an enterprise-grade authoritative DNS service...

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What do you like most about Cloudflare?

Cloudflare offers CDN and DDoS protection. We have the front end, API, and database in how you structure applications.

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What is your experience regarding pricing and costs for F5 Distributed Cloud Services?

I am not involved in sales, so I do not deal with the pricing aspect directly. I give the cost of the solution a four...

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What needs improvement with F5 Distributed Cloud Services?

It's a long way to be perfect, of course, as with all solutions. The main issue is integration with other parts or pr...

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What is your primary use case for F5 Distributed Cloud Services?

There are two main use cases for Distributed Call Services: DDoS or Distributed attacks protection and WAF web applic...

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What do you like most about Signal Sciences?

The product's most valuable feature is its ability to set up the rules easily.

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What is your experience regarding pricing and costs for Signal Sciences?

The pricing is very competitive compared to other providers. The pricing is definitely a factor in our decision-makin...

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What needs improvement with Signal Sciences?

We do use it, but the UI can be improved as we mostly work through the CI/CD. It provides support, but sometimes it i...

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Comparisons

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Compared 50% of the time

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Compared 3% of the time

Myra Security DDoS Protection vs Cloudflare

Compared 2% of the time

Azure DNS vs Cloudflare

Compared 2% of the time

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Compared 15% of the time

Imperva Application Security Platform vs F5 Distributed Cloud Services

Compared 13% of the time

F5 Silverline Managed Services vs F5 Distributed Cloud Services

Compared 13% of the time

Akamai API Security vs F5 Distributed Cloud Services

Compared 10% of the time

Azure Front Door vs F5 Distributed Cloud Services

Compared 10% of the time

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Compared 16% of the time

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Compared 16% of the time

Azure Web Application Firewall vs The Fastly Next-Gen WAF (powered by Signal Sciences)

Compared 11% of the time

Azure Front Door vs The Fastly Next-Gen WAF (powered by Signal Sciences)

Compared 9% of the time

Microsoft Azure Application Gateway vs The Fastly Next-Gen WAF (powered by Signal Sciences)

Compared 8% of the time

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Product Reports

Buyer's Guide

Cloudflare

January 2026

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CDN

January 2026

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Buyer's Guide

The Fastly Next-Gen WAF (powered by Signal Sciences)

December 2025

The Fastly Next-Gen WAF (powered by Signal Sciences) report

Download The Fastly Next-Gen WAF (powered by Signal Sciences) product report

Also Known As

Cloudflare DNS

No data available

Signal Sciences Next-Gen WAF, Signal Sciences RASP

Overview

Cloudflare enhances web performance and security with features like CDN caching and DDoS mitigation while providing easy DNS management and intuitive setup through its user-friendly dashboard.

Cloudflare is recognized for its comprehensive web security and performance solutions. Speed improvements are achieved through caching mechanisms and DDoS protection, combining ease of DNS management with flexible page rules. The robust analytics and threat insight tools provide valuable data, assisted by a user-friendly dashboard allowing quick setup and configuration. An API offers dynamic DNS settings ensuring low latency and high performance across the globe.

What are Cloudflare's key features?

CDN Caching: Enhances website speed through content delivery network caching.
Web Application Firewall: Protects websites from online threats.
DDoS Mitigation: Shields against distributed denial-of-service attacks.
DNS Management: Offers easy-to-use and flexible domain management.
SSL Certificates: Ensures secure connections between users and servers.
Analytics: Provides insights with robust analytics tools.

What benefits and ROI should users evaluate?

Enhanced Security: Strengthening web security with DDoS and firewall protection.
Speed Improvement: Faster content delivery with CDN caching.
Operational Simplicity: Simplifies website optimization through a user-friendly interface.
Scalable Solutions: Scales with global reach, lowering latency for improved performance.
Cost Efficiency: Offers layers of valuable functionality with pricing options.

Cloudflare finds utility across industries for DNS management and defense mechanisms. Its content delivery network assures fast content distribution and fortified security. Businesses integrate features like web application firewalls, load balancing, end-to-end SSL, and zero trust to protect websites from cyber threats while ensuring resilience and reliable performance.

Cloudflare

F5 Distributed Cloud Services excel in enhancing security, optimizing web application delivery, and ensuring robust network performance. Users value its integrated Web Application Firewall, DDoS protection, global server load balancing, and intuitive management interface. It boosts organizational efficiency, reduces operational costs, and scales seamlessly, making it essential for businesses operating in distributed environments.

The Fastly Next-Gen WAF (powered by Signal Sciences) provides web application and API protection, RASP, rate limiting, bot protection and DDoS purpose built to eliminate the challenges of legacy WAF.

Fastly

Sample Customers

Trusted by over 9,000,000 Internet Applications and APIs, including Nasdaq, Zendesk, Crunchbase, Steve Madden, OkCupid, Cisco, Quizlet, Discord and more.

Information Not Available

Chef, Adobe, Datadog, Etsy, GrubHub, Vimeo, SendGrid, Under Armour, Duo, AppNexus

Buyer's Guide

F5 Distributed Cloud Services vs. The Fastly Next-Gen WAF (powered by Signal Sciences)

December 2025

Free Report: F5 Distributed Cloud Services vs. The Fastly Next-Gen WAF (powered by Signal Sciences)

Find out what your peers are saying about F5 Distributed Cloud Services vs. The Fastly Next-Gen WAF (powered by Signal Sciences) and other solutions. Updated: December 2025.

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