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Market around Prompt Fence

Open-source CLI, library, and MCP server that detects prompt injection in emails, web pages, and messages, fences untrusted content, and gates agent tool calls.

Visit github.com ↗Pricing page ↗

Explore the market

Prices and medians update for the tier you select.

Compare at
Prompt Fence · Pro
No Pro plan
—
Pro-MCP server median
$99
across 3 priced MCP servers
vs Pro MCP servers
No comparison
Prompt Fence doesn't sell Pro
ⓘ Comparisons are same provider type (MCP server) and same buyer tier (Pro). Never across tiers.
Market density
68th pctile
278 competing vendors
Comparable listings · 30d
—
MCP servers · Pro median
$99/mo
3 priced · —–— mid 50%
Price spectrum · Pro plans · 8 of 10 providers priced · log scale · $29 → $99/mo
Agents MCP servers Platforms Frameworks Other◻ shaded = middle 50% · line = median (all types)Prompt Fence has no comparable Pro price — not plotted

Products in this market

Ranked by how closely each one matches Prompt Fence's job. Prices show each provider's Pro state; entry prices are labelled as such. Unpriced products still belong to the market.

MMCP servers20Ranked by similarity
Prompt Fencethis listing
● MCP
no public price
MCP Injection Guard
● MCP85% similar
no public price
Canary MCP
● MCP83% similar
no public price
EM
EMA Prompt Injection Firewall v3.1.0
● MCP82% similar
no public price
Shrike Security
● MCP81% similar
$99/mo Pro
0% vs Pro median
Quiet Menders
● MCP81% similar
no public price
PR
promptscan
● MCP81% similar
no public price
isMalicious MCP Server
● MCP79% similar
$99/mo Pro
0% vs Pro median
GU
Guard Mail
● MCP79% similar
$50/mo Pro
-49% vs Pro median
AgentDiet Prompt Guard
● MCP78% similar
no public price
mcp-skill-sec
● MCP78% similar
no public price
Cheetah Security
● MCP78% similar
no public price
NU
Nullcone
● MCP78% similar
no public price
AIM Guard
● MCP78% similar
no public price
Agent Firewall
● MCP77% similar
no public price
Guardian Data Cleanser
● MCP76% similar
no public price
CA
Canaryguard 402
● MCP76% similar
no public price
Shield
● MCP76% similar
no public price
Heeler
● MCP75% similar
no public price
Agent Security Scanner
● MCP75% similar
no public price
AAPIs3Ranked by similarity
Prompt Guard
● API86% similar
no public price
Zenguard
● API79% similar
no public price
Aegisgate
● API76% similar
no public price
OOther12Ranked by similarity
Stroq
● OTHER83% similar
no public price
GenPark Prompt Injection Jailbreak Detector
● OTHER81% similar
no public price
Endpoint Protector
● OTHER80% similar
no public price
Agent Cyber Sentinel
● OTHER79% similar
no public price
Lakera AI Agent Security Platform
● OTHER79% similar
no public price
SentinelAgent Guard
● OTHER79% similar
$49/mo Pro
xaidr
● OTHER78% similar
no public price
PHANTOM SNARE
● OTHER78% similar
no public price
Panguard Ai
● OTHER77% similar
$25 one-time Pro
not monthly-comparable
Trent Agent Plugin
● OTHER75% similar
no public price
Fabraix Playground
● OTHER75% similar
no public price
Sunglasses
● OTHER75% similar
no public price
AAgents8Ranked by similarity
Patronus Scanner
● AGENT82% similar
$69/mo Pro
AgentLooper
● AGENT79% similar
no public price
AIShield
● AGENT78% similar
no public price
Ment Tech Ai Security
● AGENT77% similar
no public price
Inkog
● AGENT77% similar
$99/mo Pro
Artguard
● AGENT76% similar
no public price
Toolproof
● AGENT75% similar
no Pro plan
entry $49/mo
Agent Blackbox
● AGENT75% similar
no public price
PPlatforms4Ranked by similarity
Clawsecure
● PLATFORM80% similar
$29/mo Pro
AI Security Guard
● PLATFORM78% similar
no public price
Lunar
● PLATFORM76% similar
no public price
Cupcake
● PLATFORM75% similar
no public price
FFrameworks3Ranked by similarity
Modelfuzz
● FRAMEWORK78% similar
no public price
Spidershield
● FRAMEWORK76% similar
$39/mo Pro
Hermes Katana
● FRAMEWORK75% similar
no public price

Market = the products most similar to this one by capability; prices are median / quartiles over its priced members, separated by provider type and buyer tier.