Index › IT › Security operations › Client-side protection › Cloudflare Page Shield vs Source Defense
Client-side protection · November 2026 Edition
Cloudflare Page Shield vs Source Defense
Zero of fourteen models named Cloudflare Page Shield first on the direct prompt; one named Source Defense. Cloudflare Page Shield was named by twelve of the fourteen models and Source Defense by eleven and Cloudflare Page Shield carries 29 labels and Source Defense 23, so the shares are not directly comparable.
Named in one category this edition.
Named in one category this edition.
First-choice share16%2%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.
Negative rate14%26%Negative labels as a share of the product's labels, 0 to 100.
Rank in category#2#5A position in a field of 10; printed, not drawn.
Labels2923A count; the two differ.
The two percentage rows are drawn on one 0 to 100 track, Cloudflare Page Shield reading right to left. Rank and label count are printed, not drawn.cside vs Cloudflare Page Shield · cside vs Source Defense · Cloudflare Page Shield vs Feroot Security
Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all fourteen models, for a mid-market B2B company; rank is within the category; every quote names the model and the prompt it came from. Both figures come from the client-side protection page.
By framing
How many of the fourteen models made each the first choice, per way of asking, and how many argued against it.
Cloudflare Page ShieldFirst choices, of fourteen modelsSource Defense
Direct011 against Cloudflare Page Shield
Paraphrase202 against Cloudflare Page Shield
Comparative001 against Cloudflare Page Shield
Budget-constrained60
Scale-constrained00
Negative006 against Source Defense
Bars are first choices, 0 to 14 each sideModels that argued againstA model can name both, so the two sides of a row do not sum to fourteen.
Across every category in the November 2026 Edition, Cloudflare Page Shield and Source Defense were named in the same answer thirty-two times, of the 80 answers naming Cloudflare Page Shield and the 59 naming Source Defense. In those answers Source Defense took the first choice two times and Cloudflare Page Shield seven.
Every model, every framing
The eighty-four answers behind the chart above, one cell each: where Cloudflare Page Shield and Source Defense stood in it.
| Model | Direct | Paraphrase | Comparative | Budget-constrained | Scale-constrained | Negative |
|---|---|---|---|---|---|---|
| Claude Haiku 4.5 | | |||||
| GPT-5.4 mini | ||||||
| Gemini 3.5 Flash | | | | |||
| Perplexity Sonar | | | | |||
| Grok 4.20 | | | | | ||
| Mistral Small | | | ||||
| DeepSeek V4 Flash | | | | | | |
| Llama 4 Maverick | | |||||
| Qwen 3.7 Flash | | | ||||
| Kimi K2 | | | | |||
| GLM 4.7 FlashX | | | ||||
| MiniMax M2.5 | | |||||
| GPT-6 Luna | | |||||
| Muse Glimmer 30B | | | | |
Cloudflare Page Shield Source Defense first choice named as an alternative argued againstblank: not namedEach cell is one answer, Cloudflare Page Shield on the left and Source Defense on the right.The direct prompt
The plain question, one answer per model, grouped by where Cloudflare Page Shield and Source Defense stood in it.
Source Defense first, Cloudflare Page Shield not the choice
1 of 14 modelsCloudflare Page Shield was named in the answer but not as the choice, or not at all.Perplexity SonarSource Defense alternatives: Akamai Client-Side Protection & Compliance, Jscrambler Webpage Integrity
Neither was the first choice, one was named
3 of 14 modelsThe answer put something else first and named one of the two as an alternative.Gemini 3.5 FlashReflectiz alternatives: Cloudflare Page Shield, Feroot Security, Jscrambler Webpage Integrity
DeepSeek V4 FlashFeroot Security alternatives: Cloudflare Page Shield, Reflectiz, cside
Qwen 3.7 FlashFeroot Security alternatives: Akamai Client-Side Protection & Compliance, Cloudflare, HUMAN Security, Source Defense
Neither was named
10 of 14 modelsThe answer made no first choice from these two in this category.Claude Haiku 4.5no first choice
GPT-5.4 minino first choice
Grok 4.20cside alternatives: Feroot Security, Reflectiz
Mistral SmallFeroot Security, cside alternatives: Akamai Client-Side Protection & Compliance, otto-js
Llama 4 Maverickno first choice
Kimi K2Feroot Security, Reflectiz alternatives: cside
GLM 4.7 FlashXcside alternatives: Feroot Security, Imperva Client-Side Protection, Microsoft Defender for Cloud, Reflectiz
MiniMax M2.5CrowdStrike Falcon, Microsoft Defender for Endpoint alternatives: ESET Endpoint Security
GPT-6 LunaMicrosoft Defender for Cloud alternatives: Sophos Intercept X
Muse Glimmer 30Bcside alternatives: Reflectiz
Bold names in an answer are the products the judge labeled a first choice; a model naming several gives each of them that label. The full answer text for every row is in the record.
By buyer segment
The same question asked on behalf of a different buyer. Each standing is computed within its segment and they are never added together. The figures above are the mid-market standing, which is the one the category orders by.
Small business
Cloudflare Page Shield leads by thirteen points.
Cloudflare Page Shield13%#3 of 11Source Defense0%#8 of 11Mid-marketThe figures above
Cloudflare Page Shield leads by fourteen points.
Cloudflare Page Shield16%#2 of 10Source Defense2%#5 of 10Enterprise
Level: the same share of first choices.
Cloudflare Page Shield4%#6 of 12Source Defense4%#8 of 12What the models said about Cloudflare Page Shield
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Six of eight in this category shown.
“Convenient if you already run Cloudflare, but a major migration if you don't. Free tier exists but isn't compliance-sufficient.” DeepSeek V4 Flash · paraphrase prompt · soft negative
“Cloudflare Page Shield samples down to 1% of sessions, leaving 99% of user sessions without monitoring” Claude Haiku 4.5 · comparative prompt · soft negative
“it ranks less strongly for mid-market client-side protection than the leading options” Perplexity Sonar · direct prompt · soft negative
“For most mid-sized B2B companies already on Cloudflare, Cloudflare Client-side Security gives you script inventory, change alerting and PCI 6.4.3/11.6.1 evidence with near-zero ops overhead.” Muse Glimmer 30B · paraphrase prompt · first choice
“Cloudflare Client-Side Security (Page Shield) and Feroot Security are the best choices due to their free tiers and strong reputations.” Mistral Small · budget prompt · first choice
“If you are on Cloudflare: Enable Cloudflare Page Shield. It is the path of least resistance and covers PCI 4.0 requirements natively.” Gemini 3.5 Flash · paraphrase prompt · first choice
What the models said about Source Defense
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Six of eight in this category shown.
“Tools that rely solely on client-side JavaScript agents or sandboxing (such as those from vendors like JScrambler, SourceDefense, Reflectiz, and Human Security) are often criticized.” Mistral Small · negative prompt · hard negative
“"such as JavaScript sandboxing agents (e.g., from vendors like JScrambler, SourceDefense/Reflectiz, Human Security)" ... 7 of 14 models · 3 hard negative” Muse Glimmer 30B · negative prompt · hard negative
“Vendors like SourceDefense, JScrambler, Reflectiz (in some implementations), Human Security, and otto-js have been criticized” Kimi K2 · negative prompt · hard negative
“Source Defense is the strongest default choice” Perplexity Sonar · direct prompt · first choice
“Best for organizations that rely heavily on tag managers and need to control the blast radius of third‑party scripts” MiniMax M2.5 · comparative prompt · alternative
“Choose Source Defense when enforcing fine-grained permissions for third-party scripts matters most.” Perplexity Sonar · comparative prompt · alternative
Also compared
cside vs Cloudflare Page Shieldcside vs Source DefenseCloudflare Page Shield vs Feroot SecurityCloudflare Page Shield vs ReflectizCloudflare Page Shield vs Feroot PaymentGuardFeroot Security vs Source DefenseReflectiz vs Source DefenseSource Defense vs Feroot PaymentGuardAll fifteen head-to-head pages and the full client-side protection standing
Comparisons are drawn for the top eight products in each category, each against each. The output is the models' output; nothing here is a recommendation by the index.