Vendor catalogue
All 20 Prompt-Injection Defence Vendors
9 vendors with a public price, 11 quote-only. Every card links to a dedicated pricing page with the verbatim tier table and the verified-on date.
Published-price vendors
Vendors who publish at least one line price on their public pricing page. Sorted by cheapest paid rate, with free-tier and open-source paths shown first.
B
Published
AWS Bedrock Guardrails
$0.08 per 1K text units (prompt attack filter)
→
M
Published
Google Cloud Model Armor
$0.10 per million tokens (after 2M free monthly)
→
A
Free tier
Azure AI Content Safety / Prompt Shields
Free F0 tier (5 RPS), then $0.38 per 1K text records on S0
→
L
Free tier
Lakera (Lakera Guard, Lakera Red)
Free Community tier, paid plans quote-only
→
P
Free tier
Promptfoo
Free Community (open source), Team starts at published rate
→
G
Free tier
Guardrails AI
Open-source Hub free, Pro is quote-only
→
N
Free tier
NVIDIA NeMo Guardrails
Free open source (Apache 2.0)
→
G
Free tier
Garak (NVIDIA)
Free open source (Apache 2.0)
→
W
Free tier[DISCONTINUED]
WhyLabs (LangKit)
Open source only (platform discontinued)
→
Quote-only vendors
Vendors that publish no list price on their public site. We will not invent a number. The contact link on each vendor page goes straight to the vendor request form.
P
Quote only[acquired]
Palo Alto Networks Prisma AIRS (incl. Protect AI)
Quote only
→
H
Quote only
HiddenLayer (AISec Platform, Model Scanner)
Quote only
→
C
Quote only[acquired]
Cisco AI Defense (ex Robust Intelligence)
Quote only
→
N
Quote only
Noma Security
Quote only
→
P
Quote only
Prompt Security
Quote only
→
C
Quote only
CalypsoAI
Quote only
→
M
Quote only
Mend AI
Quote only
→
W
Quote only
Wiz AI-SPM
Quote only
→
C
Quote only
CrowdStrike Charlotte AI / Falcon for AI
Quote only
→
P
Quote only
Pillar Security
Quote only
→
K
Quote only
Knostic
Quote only
→
20 total vendors tracked. Updated 2026-06-19.
Last verified June 2026Source: vendor pricing pages. See /methodology.