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Total cost of ownership

Prompt-Injection Defence TCO: 1-Year and 3-Year Scenarios

All three scenarios are labelled illustrative. None are real customer deals. They reflect typical procurement envelopes built from the published rates and the quote-only-vendor band guidance on this site.

$30K-$3M
Year-1 TCO range across scenarios
3
Org-size scenarios
6
Spend buckets per scenario

Scenario A: small (one LLM feature, low traffic)

Small org, year-1
Illustrative example, not a real company
  1. 01.Azure F0 free tier or hyperscaler at low usage$1,200
  2. 02.Garak / Promptfoo OSS scans$0
  3. 03.Engineer 0.1 FTE$24,000
  4. 04.SIEM logging overhead$3,500
  5. 05.Misc tooling$1,500
Year-1 (illustrative)$30,200
Illustrative example, not a real company

Scenario B: mid (multiple LLM features, real traffic)

Mid org, year-1
Illustrative example, not a real company
  1. 01.Hyperscaler guardrail (50M calls / yr)$48,000
  2. 02.Specialist runtime guardrail subscription(quote midpoint)$60,000
  3. 03.AI red team (1 engagement)$40,000
  4. 04.Eval engineer 0.5 FTE$120,000
  5. 05.SIEM + SOC integration$25,000
  6. 06.Latency-overhead infra$15,000
Year-1 (illustrative)$308,000
Illustrative example, not a real company

Scenario C: regulated enterprise

Regulated enterprise, year-1
Illustrative example, not a real company
  1. 01.Multi-vendor hyperscaler guardrail spend$240,000
  2. 02.Specialist runtime guardrail + agent-aware coverage(quote midpoint)$400,000
  3. 03.Continuous AI red team$300,000
  4. 04.AI-SPM platform (Wiz, Noma or Prisma AIRS)$350,000
  5. 05.AI-security team 5 FTE$1,200,000
  6. 06.Compliance overhead (EU AI Act + SOC 2 + ISO 27001)$200,000
Year-1 (illustrative)$2,690,000
Illustrative example, not a real company

3-year curves

Illustrative based on our own modelling (see /methodology): we assume FTE and red-team lines ease in years 2 and 3 as runbooks mature and false-positive tuning stabilises, hyperscaler and specialist vendor lines grow with traffic, and compliance overhead is largely fixed once the first audit cycle is paid. Use vendor- or analyst-published benchmarks for your own org rather than a portfolio-wide percentage.

Adjacent cost references

edrcost.com
EDR cost calculator, endpoint-security buying cluster.
mdrcost.com
MDR pricing, managed detection sister.
xdrcost.com
XDR pricing, extended detection sister.
siemcostcalculator.com
SIEM cost, log / SOC sister.
securityoperationscost.com
SOC cost calculator, feeds AI defence as a SOC add-on.
pentestingcost.com
Pentest pricing, the human analogue for AI red teaming.
pamcost.com
PAM pricing, identity side of access-control story.
threatintelagents.com
AI threat-intel agents, adjacent AI-for-security buyer.
databreachcost.com
Breach cost, quantifies the downside an AI tool prevents.
soc2cost.com
SOC 2 cost, compliance adjacency for AI controls.
iso27001cost.com
ISO 27001 cost, AI / ML annex pairing.
hipaacompliancecost.com
HIPAA cost, healthcare-LLM data-leak angle.
gdprcompliancecost.com
GDPR cost, EU AI Act + prompt-injection-as-DPIA angle.
pcicompliancecost.com
PCI cost, same buyer pattern.
fedrampcost.com
FedRAMP cost, federal AI controls cross-link.

For the calculator front end, see the homepage. For implementation cost only, see /llm-security-implementation-cost.

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