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F5 Silverline Managed Services vs Fastly comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Dec 5, 2024

Review summaries and opinions

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

ROI

Sentiment score
6.1
F5 Silverline boosts security, efficiency, and revenue with global scalability, offering ROI up to 100% and enhanced website performance.
Sentiment score
6.0
Fastly boosts return on investment with improved performance, reduced latency, and cuts infrastructure costs by 40-60%.
Our revenue has grown substantially after the introduction of F5 Silverline Managed Services.
Product Management Consultant at Mafoi Strategic Consultants
F5 Silverline Managed Services is a global solution we have used for one of our customers, providing high scalability and protecting all of our public assets in both low and high demand situations, which is very important for any customer with a global presence.
Dns architect at a outsourcing company with 5,001-10,000 employees
I have seen a return on investment in the time saved.
Cloud Support at a security firm with 51-200 employees
Realizing a 30 to 50% reduction in latency and page load time, ensuring users experience a seamless workflow.
Senior software engineer at Simplify vms
I have seen a return on investment, particularly in time savings, especially regarding the changes.
Cloud architect at a tech vendor with 10,001+ employees
 

Customer Service

Sentiment score
6.5
F5 Silverline's support is helpful and responsive but can encounter delays, with satisfaction depending on interaction and urgency.
Sentiment score
6.3
Fastly's customer care is efficient with multi-channel support, but has inconsistencies in response times and transparency across time zones.
Anyone who comes on a call has deep knowledge of how this product works.
Dns architect at a outsourcing company with 5,001-10,000 employees
I think 24/7 expert support and streamlined compliance management definitely benefit my company's security efforts.
Associate Vice President at Novac Technology Solutions
Configuration problems largely arise from customer misunderstanding, leading to cases opened for configuration aspects where AI has become increasingly useful.
Network And Security Consultant at TD SYNNEX
demonstrating the team's technical expertise in CDN and Edge architecture
Senior software engineer at Simplify vms
We have SLAs defined because we opted for enterprise support pricing.
Staff Engineer at a retailer with 1,001-5,000 employees
We are not getting quick responses from Fastly technical support engineers.
Technical support engineer at Adobe
 

Scalability Issues

Sentiment score
7.3
F5 Silverline Managed Services is praised for its scalability, adaptability, and effective traffic management, meeting enterprise demands seamlessly.
Sentiment score
6.4
Fastly is praised for scalability, ease of growth support, cloud flexibility, excellent support, and successful global integrations.
The scalability of F5 Silverline Managed Services is high, as it is a SaaS-based platform that can be scaled on demand according to our end customer's needs.
Dns architect at a outsourcing company with 5,001-10,000 employees
The solution is fully scalable, and I would give it a rating of ten on a scale of one to ten for scalability.
Design & Delivery Senior Network Security Architect at Qiddiya Investment Company
F5 Silverline Managed Services is not a concern due to its scalability.
Associate Vice President at Novac Technology Solutions
Seamlessly handling massive traffic without requiring backend changes due to its globally distributed Edge network and stateless API-driven design.
Senior software engineer at Simplify vms
 

Stability Issues

Sentiment score
7.6
F5 Silverline Managed Services is stable, reliable, with responsive support, despite occasional issues linked to maintenance activities.
Sentiment score
7.3
Fastly is stable and reliable with high uptime, no technical issues, and strong performance in enterprise applications.
I have not seen anything suspicious with its accuracy or output.
Product Management Consultant at Mafoi Strategic Consultants
Highly reliable for enterprise-scale applications with high uptime guarantees.
Senior software engineer at Simplify vms
 

Room For Improvement

F5 Silverline users desire lower costs, improved AI, and simplified processes alongside better automation, compliance, and intuitive interfaces.
Fastly requires improvements in China presence, configuration complexity, pricing, customer support, security features, documentation, and bot detection.
F5 Silverline Managed Services needs to adapt compliances related to India's DPDP.
Associate Vice President at Novac Technology Solutions
Localized support could enhance F5 Silverline Managed Services.
Cloud Support at a security firm with 51-200 employees
Radware provides straightforward blocking WAF and TPS, which are important features that are easier to implement.
Senior Security Consultant at kyndryl
I chose 8 out of 10 because it has excellent performance and low latency delivery, making it suitable for larger applications, with strong Edge Caching and instant purging capabilities.
Senior software engineer at Simplify vms
Fastly could improve by improving the documentation and having some code examples.
Cloud architect at a tech vendor with 10,001+ employees
Fastly should provide features similar to Cloudflare regarding a block list.
Technical support engineer at Adobe
 

Setup Cost

F5 Silverline Managed Services pricing is variable and considered costly but justified by its quality and customizable options.
Fastly is competitively priced with usage-based costs and customizable options, but some find it expensive with a learning curve.
In Indian currency, it is approximately 25 to 30 lakh.
Senior Security Consultant at kyndryl
The solution is expensive
Design & Delivery Senior Network Security Architect at Qiddiya Investment Company
Regarding the pricing of F5 Silverline Managed Services, I would say it is quite affordable.
Associate Vice President at Novac Technology Solutions
It operates on a pay-as-you-go structure, but costs scale with traffic, requiring monitoring to avoid unexpected spikes based on data transfers and the number of requests handled.
Senior software engineer at Simplify vms
In terms of price, I find it good.
Cloud architect at a tech vendor with 10,001+ employees
 

Valuable Features

F5 Silverline provides 24/7 DDoS protection and WAF with real-time threat intelligence, enhancing web application performance and reliability.
Fastly CDNs integrate with Signal Sciences WAF for efficient content delivery, enhancing performance with global edge locations and code management.
It allows for centralized management of certificates, protecting applications from top ten attacks like SQL injection and cross-site scripting.
Design & Delivery Senior Network Security Architect at Qiddiya Investment Company
One part is positive security, which allows you to know vulnerabilities in depth, and you can implement CAPTCHA and MFA for logins, while also preventing known threats with included signatures.
Network And Security Consultant at TD SYNNEX
F5 Silverline Managed Services has positively impacted my organization by drastically helping us during a major DDoS attempt or web scraping that was detected, where F5 handled the triage and mitigation entirely.
Lead Engineer at a renewables & environment company with 10,001+ employees
The best feature that Fastly offers is the Edge location, which reduces latency, making our applications work smoother because we do not have to constantly call the backend.
Senior software engineer at Simplify vms
Fastly has a wide number of configuration features that can be performed, and I emphasize that they can be done from code, which makes it much more traceable.
Cloud architect at a tech vendor with 10,001+ employees
In this project, it is working as a reverse proxy for CDN and WAF, web application firewall, additionally image optimization.
Technical support engineer at Adobe
 

Categories and Ranking

F5 Silverline Managed Services
Ranking in Web Application Firewall (WAF)
14th
Ranking in Distributed Denial-of-Service (DDoS) Protection
5th
Average Rating
8.2
Reviews Sentiment
6.6
Number of Reviews
21
Ranking in other categories
No ranking in other categories
Fastly
Ranking in Web Application Firewall (WAF)
25th
Ranking in Distributed Denial-of-Service (DDoS) Protection
11th
Average Rating
8.6
Reviews Sentiment
6.5
Number of Reviews
11
Ranking in other categories
CDN (6th)
 

Mindshare comparison

As of November 2026, in the Web Application Firewall (WAF) category, the mindshare of F5 Silverline Managed Services is 1.6%, up from 1.2% compared to the previous year. The mindshare of Fastly is 2.2%, up from 1.7% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Web Application Firewall (WAF) Mindshare Distribution
ProductMindshare (%)
F5 Silverline Managed Services1.6%
Fastly2.2%
Other96.2%
Web Application Firewall (WAF)
 

Featured Reviews

Sanchit Makkar - PeerSpot reviewer
Dns architect at a outsourcing company with 5,001-10,000 employees
Robust protection has secured global web assets and keeps critical applications available
F5 Silverline Managed Services can be improved in areas with complex onboarding processes and slow deployment settings. Tuning of policy requires significant technical expertise, and there is a lack of knowledge in the F5 world where one needs to go through a steep learning curve in understanding what and how the policy should be configured for effectively protecting an application. These processes need to be streamlined.Knowing the limitations of F5 Silverline Managed Services, F5 has come out with a new product called F5 distributed cloud WAF platform, which has a better API integrated with security modules. It also offers advanced auto discovery, swagger, and open API validation, which is much better than Silverline.
Pranay Jain - PeerSpot reviewer
Senior software engineer at Simplify vms
Edge caching has transformed response times and delivers faster candidate data globally
Fastly can be improved in certain areas such as VCL, which is powerful but has a steep learning curve for normal users. A more user-friendly, UI-based configuration could simplify the experience, alongside better templates for common use cases and dashboard improvements, as the current dashboard feels complex for beginners, and pricing can be hard to predict for smaller companies. I chose 8 out of 10 because it has excellent performance and low latency delivery, making it suitable for larger applications, with strong Edge Caching and instant purging capabilities. However, VCL complexity and pricing predictability, especially for smaller companies, along with a user-friendly dashboard are areas impacting my score.
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Top Industries

By visitors reading reviews
Financial Services Firm
14%
Outsourcing Company
10%
Construction Company
9%
Comms Service Provider
8%
Financial Services Firm
12%
Outsourcing Company
11%
Manufacturing Company
10%
Comms Service Provider
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business9
Midsize Enterprise2
Large Enterprise13
By reviewers
Company SizeCount
Small Business6
Large Enterprise7
 

Questions from the Community

Is Citrix ADC (formerly Netscaler) the best ADC to use and if not why?
For ADC, any ADC can do a good job. But in case if you want to add WAF functionality to the same ADC hardware you have to look for other ADC's like F5, Imperva, Radware, Fortinet, etc.
What is your experience regarding pricing and costs for F5 Silverline Managed Services?
I was not involved in any discussions regarding pricing, setup costs, and licensing for F5 Silverline Managed Services.
What needs improvement with F5 Silverline Managed Services?
F5 Silverline Managed Services can be improved in areas with complex onboarding processes and slow deployment settings. Tuning of policy requires significant technical expertise, and there is a lac...
What is your experience regarding pricing and costs for Fastly?
In terms of price, I find it good, and as I mentioned, the implementation cost had some difficulty at the beginning due to the learning curve.
What needs improvement with Fastly?
I think Fastly could improve by improving the documentation and having some code examples so that it is easier for developers, since at the beginning it becomes a bit complicated.
What is your primary use case for Fastly?
My primary use case for Fastly is using it as a CDN to speed up my customers' access to the applications. A specific example of how Fastly has helped improve my customers' access to the application...
 

Also Known As

F5 Silverline Web Application Firewall, F5 Silverline DDoS Protection
No data available
 

Overview

 

Sample Customers

City Bank, Ricacorp Properties, Miele, American Systems, Bangladesh Post Office
Twitter, Airbnb, Alaska Airlines, Pinterest, Vimeo, The Guardian, The New York Times, Ticketmaster, The Drupal Association, Opera, about.com, imgur, Etsy, Foursquare, GitHub, New Relic, shopify, Shazam, Firebase
Find out what your peers are saying about F5 Silverline Managed Services vs. Fastly and other solutions. Updated: September 2026.
920,929 professionals have used our research since 2012.