F5
What F5 actually does
F5’s heritage is application delivery controllers — the BIG-IP platform. BIG-IP provides load balancing, SSL offloading, web application firewall (Advanced WAF), and DDoS protection. It is the market leader in ADC and has been deployed in data centers for decades. BIG-IP runs on hardware appliances, virtual editions, and in public clouds.
The newer growth area is F5 Distributed Cloud Services (formerly Volterra, acquired in 2021). This is a SaaS platform providing multi-cloud networking, web app and API protection (WAAP), bot defense, and DDoS mitigation. It competes with Cloudflare, Akamai, and Fastly in the cloud-delivered application security space.
F5 also owns NGINX, the open-source web server and reverse proxy used by a massive portion of the internet. NGINX Plus is the commercial version with additional load balancing, API gateway, and monitoring features. The three product lines — BIG-IP, Distributed Cloud, and NGINX — serve different buyer personas and deployment models, which sometimes creates confusion about what F5 actually is.
Who it’s best for
- Enterprises with large, complex web application portfolios needing WAF and DDoS protection
- Organizations operating across multiple clouds that need consistent application security and networking
- DevOps and platform engineering teams already using NGINX that want commercial support and management
- Financial services and e-commerce companies with strict application availability and security requirements
- Teams managing API-heavy architectures that need API discovery and runtime protection
Pricing reality check
BIG-IP pricing depends on the platform (hardware vs. virtual) and subscription tier. A BIG-IP i5800 appliance with Advanced WAF runs in the high five figures. Virtual editions are cheaper but still carry annual subscription costs in the $20,000-$50,000 range depending on throughput and modules. ELAs (Enterprise License Agreements) are available for large deployments.
F5 Distributed Cloud Services use consumption-based or per-app pricing. Expect $500-$2,000/month per application for WAAP, though this varies by traffic volume and features. NGINX Plus runs approximately $2,500/year per instance. The transition from perpetual BIG-IP licenses to subscription and SaaS models means existing customers face pricing model changes at renewal.
Alternatives to consider
Cloudflare — Simpler deployment, transparent pricing, and a massive global network. If you need WAF and DDoS protection without appliance management, Cloudflare is easier to adopt.
Akamai — Larger CDN footprint and mature WAAP through App & API Protector. Better for organizations with extreme scale and global content delivery requirements.
AWS WAF + CloudFront / Azure Front Door — Cloud-native WAF options that work well if you are single-cloud. Cheaper than F5 for straightforward use cases but less capable for complex rulesets.
Imperva — Dedicated WAAP vendor with strong database security heritage. Worth evaluating if your primary need is web app and API security without the ADC functionality.
The Charting Cyber take
Buy F5 when you have complex, multi-cloud application architectures that need consistent security and delivery policies. BIG-IP remains the gold standard for ADC in data centers with demanding availability requirements. Distributed Cloud Services are maturing into a credible multi-cloud networking and WAAP platform.
Skip it if your applications are simple and cloud-native. Cloudflare will give you WAF and DDoS protection faster, cheaper, and with less operational overhead. Also skip it if you are an existing BIG-IP customer being pushed to Distributed Cloud before it meets your needs — evaluate the new platform on its own merits, not because your sales team wants you to migrate. The transition from hardware to SaaS is still in progress, and not every feature has made the jump.