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Pillar guide

Prompt Injection Cost 2026: The Ultimate Buyer's Guide

What prompt-injection defence costs across 20 named vendors in 2026, with hidden cost lines, OWASP mapping and a step-by-step buying playbook.

20
Vendors tracked
$0.08
Cheapest published per-1K rate
14
Quote-only vendors
2026-06
Verified
“Pricing is meaningless without coverage; coverage is meaningless without published terms you can negotiate against.”
Editorial framing, promptinjectioncost.com

Six steps to a defensible board paper

  1. 1
    Inventory LLM calls
    Discovery
  2. 2
    Map to OWASP LLM Top 10
    Coverage
  3. 3
    Shortlist vendors
    Published rate where possible
  4. 4
    Get quotes
    Quote-only vendors in parallel
  5. 5
    Model TCO
    1 yr and 3 yr
  6. 6
    Sign + integrate
    SIEM, SOC, eval CI

What to read after this guide

Last verified June 2026Source: vendor pricing pages. See /methodology.