Assivox — We hack your AI agent first. Then we protect it.
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AI security · voice & chat agents

We hack your AI agent first.
Then we protect it.

Assivox runs authorized penetration tests against your voice and chat agents, then deploys real-time protection tuned to what we actually found — not a generic OWASP checklist.

No agent access required to get a quote · Results in 5 business days
Tested against
VapiBland AIRetell AICustom LLM apps
live_attack_simulation.log OWASP LLM Top 10 · real-time
Screening gate
Passed clean
Blocked — injection attempt
Under evaluation
10/10
OWASP LLM categories tested
<40ms
Added protection latency
5 days
Report turnaround
24/7
Monitoring once deployed

How it works

Three steps from first contact to a protected agent.

01

Authorized penetration test

We attack your live agent under a signed scope agreement — prompt injection, jailbreaks, data exfiltration, agentic overreach.

02

Findings report

A ranked report mapped to OWASP LLM Top 10, with proof-of-concept transcripts and remediation guidance in plain terms.

03

Deploy protection

We drop in real-time screening tuned to your specific findings, then monitor continuously as new attack patterns emerge.

Why Assivox

Built to be trusted with a live production agent.

RG

Research-grade detection

Detection models trained and benchmarked against real adversarial datasets, not a prompt wrapped around an off-the-shelf filter.

Works with your existing agent

No migration. We test and protect what you've already built on Vapi, Bland, Retell, or a custom stack — nothing to rebuild.

£

Priced for small teams

Security testing that used to require an enterprise budget, scoped and priced for founders and small businesses shipping AI agents.

OWASP LLM Top 10 coverage

What's tested and protected today, and what's shipping next.

Covered today

LLM01Prompt injection
LLM02Sensitive data disclosure
LLM04Model denial of service
LLM05Improper output handling
LLM06Excessive agency
LLM07System prompt leakage

On the roadmap

LLM03Training data poisoning
LLM08Vector & embedding weaknesses
LLM09Misinformation
LLM10Unbounded consumption

Our testing stack

We don't run one script and call it a pentest.

Garak

Broad automated vulnerability scanning across known LLM attack classes, used as a first pass on every engagement.

PyRIT

Multi-turn adversarial testing that simulates a persistent attacker probing your agent across an entire conversation.

Promptfoo & DeepTeam

Structured test suites mapped directly to OWASP LLM Top 10 categories, so every finding traces back to a named risk.

"Assivox found a prompt injection path in our booking agent that would have let anyone override the pricing logic. Fixed before we ever launched publicly."
Early access partner — voice agent startup, pre-launch

Pricing

Test once, or stay protected on an ongoing plan.

Security test
£249 one-time
Full penetration test + report
  • Full OWASP LLM Top 10 test
  • Ranked findings report
  • Remediation guidance
Book a test
Protect · Business
£159/mo
Multiple agents, priority care
  • Everything in Growth
  • Up to 5 agents
  • Quarterly pentest included
  • Priority support
Get started
Enterprise
Custom
Volume & compliance needs
  • Everything in Business
  • Dedicated engagement lead
  • SLA-backed monitoring
Talk to us

Frequently asked

Every test runs under a signed authorization agreement scoping exactly what we're allowed to probe, before we send a single request. Nothing runs against your agent without written permission.

A mix of Garak for broad scanning, PyRIT for multi-turn adversarial simulation, and Promptfoo/DeepTeam for structured OWASP-mapped test suites — plus manual testing for anything automation misses.

It's when someone hides instructions inside normal-looking input to get your agent to ignore its original rules — for example, tricking a support bot into revealing internal pricing logic or confidential data.

You get a ranked report with proof-of-concept transcripts for every finding. If you go on to a Protect plan, we deploy screening rules tuned specifically to what we found, not a generic template.

Test transcripts and findings are encrypted at rest, retained only for the duration of the engagement plus reporting, and never used to train shared models.

Find out what your agent gives away before someone else does.

Book an authorized test. Get a ranked report in 5 business days.