Best Web Application Firewall Software in 2026
Updated
In short: F5 BIG-IP APM is ranked #1 of 30 as of 4 October 2026, ahead of BunkerWeb and Fastly Image Optimizer. The best-ranked option with a free plan is BunkerWeb. The lowest first paid tier on this page is Fastly Image Optimizer at $0.01/mo.
Protecting web applications involves weighing security capabilities alongside the practicalities of deployment and operations. Compare API protection, bot management, managed rule sets, and rate limiting; deployment model and log retention provide further points of fit. Free-plan availability and paid-from pricing offer cost details to consider with those capabilities. F5 BIG-IP APM, BunkerWeb, and Fastly Image Optimizer are among the options, alongside Gcore WAAP and Wallarm API Security. The listed comparison fields can help you focus on the protections and operational details relevant to your application environment.
30 web application firewall software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
Is your tool on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which web application firewall software is ranked first on Specifiction?
F5 BIG-IP APM is ranked #1 of 30 with a score of 7.7. BunkerWeb is second and Fastly Image Optimizer third.
How many of these have a free plan?
8 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Fastly Image Optimizer has the lowest first paid tier we found: $0.01/mo.
How is this list ranked?
Ranked on what each maker publishes, the fullest spec sheet first: how deeply the product is documented, the platforms it runs on, a free tier or trial to test it, and its standing. Paid placements never change a rank.