Buying snapshot
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| Decision point | What PromptBrake states |
|---|---|
Deployment | Self-hosted Docker runner, set up with a generated command on your machine, VM or CI worker. The setup command lets Docker pull the private runner image; no AWS or Docker Hub account is required. |
Data handling | Prompts, credentials, responses and test results stay in your environment. License checks and quota usage reach PromptBrake; optional product feedback sharing is off by default. |
What it tests | 138 checks across 18 attack categories, run through your API endpoint or web chat interface. Coverage depends on the target and configuration. |
Free trial | Account creation is free. The trial license gives 3 scans for 7 days from license creation, with no payment or approval required. |
What it is not | Automated testing software. The subscription does not include a separately performed manual penetration test, a certification, or a guarantee that every vulnerability will be found. |
Our take
PromptBrake fits a team that owns an AI application, can run a Docker container near it, and wants the same attack suite re-run after each prompt, model, retrieval or tool change. If you need a hosted service, a certification, or proof that backend actions really happened, plan for other controls as well. Use the 3 trial scans as PromptBrake suggests: an initial test, a retest after a fix, and a repeat run.
Evaluate PromptBrake
Comparisons
Where it stands out
Testing happens next to your target. Test traffic goes from the runner to your configured target, and the runner keeps its reports locally. This suits teams that cannot send prompts or credentials to an outside testing service.
Coverage reaches agent behavior, not only chat. Checks cover cross-user data leaks, exposed credentials and hidden context; prompt injection, poisoned retrieval content, role overrides and instructions that persist in memory; and tool parameters, transaction rules, network boundaries and false claims that an action succeeded. Replay Packs add reproductions of publicly reported attacks, such as the Slack AI data exfiltration via prompt injection (Aug 2024).
Findings a developer can act on. Each finding shows the triggering input, the response and remediation guidance together, and teams can export the results and compare retests with Baseline Diff. PromptBrake's own reference application shows the pattern: the first full-suite run scored 75/100 with 1 failed (an output sanitization bypass), 4 warned and 7 passed; the retest after a code-level fix scored 91/100 with 0 failed. PromptBrake notes this is its own test application, not a customer engagement.
Release gates in CI. The Enterprise plan includes CI release gates, so a scan result can block releases that do not meet your policy instead of staying a one-off audit.
Product screenshot
Trade-offs to weigh
Backend actions may go unverified. Findings describe tested behavior, not a security certification, and verification of backend tool execution depends on the target integration. Action verification is a planned capability, described as research only and not included in purchases.
Every fix cycle spends scans. Retests use scans from the same allowance, and on the Enterprise plan manual and CI-triggered scans share one quota. A team that gates each release in CI and retests every failure will use its 30 monthly scans faster than the release count alone suggests.
You run and pay for the test environment. The runner runs on your infrastructure, near the target you want to test, and your target's model and infrastructure charges remain yours. PromptBrake asks buyers to include setup, infrastructure, model usage and review costs when assessing the subscription.
Savings are not yet measured. PromptBrake states that time saved and avoided breach costs have not been established by a PromptBrake customer study, so measure the value against your current process during the trial.
Pricing and plan conditions
The two paid options differ in how scans are bought. The scan pack is a one-time purchase that is valid for 30 days from payment and does not renew. PromptBrake Enterprise is a month-to-month subscription: its 30 scans apply per billing period, the quota resets when the subscription renews, and you manage renewal and cancellation from your account.
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| Plan | Published price | What it adds |
|---|---|---|
30-day scan pack | $99 USD once | 5 scans, no automatic renewal. Connection checks do not use a scan; once a scan starts, it uses one credit even if it later fails. |
PromptBrake Enterprise | $499/mo | 30 scans per billing month and one active Enterprise Runner license at a time. Includes 138 checks across 18 attack categories, API endpoint and web chatbot testing, findings with business impact and remediation guidance, exports and Baseline Diff, and CI release gates. |
Public signals
About these signals
Verified factual signals from public sources. They indicate observable activity or interest, not total adoption, product quality, or cost.
4.4k Docker Hub pulls9 Product Hunt comments
See all signals from 2 sources
Alternatives to PromptBrake
The reviewed substitutes for PromptBrake among the AI security, and what would make each one the better answer.
Other approaches
A different approach to the same problem. Each substitutes only for the workload named beside it.
- Ethicore Engine™ - Guardian SDK
- PromptBrake stress-tests an LLM endpoint with 60+ attack prompts across 12 security checks and returns PASS/WARN/FAIL verdicts with evidence, built to run as a CI/CD release gate. Ethicore Engine - Guardian SDK is a pip-installable Python layer that blocks prompt injection, jailbreaks and role hijacking inline, in front of the model call, offline and with no cloud dependency. Both answer AI-application security for the same buyer, so the choice is between repeatable pre-release testing you can export and gate on, and runtime blocking inside the application itself. Recorded as a class-level editorial judgement in ai-security rather than a published head-to-head.Applies to: Defending an LLM application against prompt injection, jailbreaks and unsafe output.
Related technologies
Normally used together rather than chosen between, so these are not alternatives.
- AgentVault
- PromptBrake tests LLM endpoints for prompt injection and data leaks before release; AgentVault monitors agents for security problems while they run. Testing and runtime monitoring are the two halves of the same concern and are deployed together, so the reader's question is which half each one covers.Applies to: Whether AI security is handled by testing endpoints before release or watching agents in production.
Head to head
See detailed alternatives analysis
If you are evaluating PromptBrake alternatives, you have several strong options for automated AI security testing. PromptBrake runs 138 checks across 18 attack categories against LLM endpoints, pricing is $499/mo for 30 scans per billing period on its single Enterprise plan. Below we compare five alternatives that cover overlapping ground in AI and application security, each with a different angle on vulnerability detection, pricing, and workflow integration.
Top Alternatives Overview
EarlyCore is an AI agent security layer that scans for prompt injection, data leakage, and jailbreaks before deployment, then monitors agents in real-time production environments. It works natively with AWS Bedrock, Google Gemini Enterprise Agent Platform (formerly Vertex AI), and custom stacks, with a claimed 15-minute setup time. EarlyCore uses enterprise pricing (contact for quote), which positions it for teams running AI agents at scale rather than individual developers. Choose EarlyCore if you need continuous production monitoring alongside pre-deployment scanning, especially if your stack runs on Bedrock or Gemini Enterprise Agent Platform.
Vibio takes a deterministic-first approach to security scanning, running 50+ rule-based checks against your URL or GitHub repository before layering AI review on top. It covers auth surfaces, security headers, rate limiting, exposed API keys, input validation, CI/CD pipelines, and dependency risks. Vibio sells a one-time full scan for £4.99, and subscriptions cost £9.99/mo for 4 scans or £39.99/mo for 20 scans. Choose Vibio if you need broad application security coverage beyond just LLM endpoints and want deterministic, repeatable results with file-level evidence.
CodeWatchdog combines Claude-powered AI scanning with senior engineer human audits. The automated layer costs $20 per scan and delivers a 0-100 security score with severity ratings in under 60 seconds, covering logic errors, access control gaps, reentrancy bugs, and AI anti-patterns. Human review starts at $499 with NDA standard on every engagement. Choose CodeWatchdog if you need one-off deep code audits rather than continuous scanning, or if your codebase includes smart contracts and Solidity code where AI-generated bugs have caused $191M+ in losses.
Flarehawk focuses on security operations automation rather than code-level scanning. It ingests Cloudflare telemetry, turns alerts into automated investigations, and generates remediation plans. Flarehawk has a free plan with 3 investigations; paid plans are Detect at $749/mo and Investigate at $1,499/mo, with Enterprise from $3,999/mo. It includes 5-year log retention, SSO, and Slack integration. Choose Flarehawk if your security challenge is alert fatigue and investigation backlog from Cloudflare infrastructure rather than LLM-specific vulnerabilities.
Joinble AI KYC operates in identity verification rather than code security, offering forensic deepfake detection, biometric verification, and AI-powered case management for fintechs and marketplaces. It uses enterprise pricing with custom identity flow design. Choose Joinble AI KYC if your security concern is identity fraud and KYC compliance rather than LLM endpoint hardening.
Architecture and Approach Comparison
PromptBrake takes a black-box endpoint testing approach: you provide your API URL, model name, and key, and including system prompt leak, cross-user data leak, indirect prompt injection, tool abuse, and long-context refusal decay. This endpoint-only design means zero code changes and no agent installation required.
EarlyCore differs by offering both pre-deployment scanning and runtime monitoring, giving it visibility into production behavior that PromptBrake lacks. Vibio takes the opposite approach: it analyzes your actual codebase and URL surface with deterministic rule-based checks, catching infrastructure-level issues like missing security headers, unprotected API routes, and weak input validation that endpoint-only testing cannot detect. CodeWatchdog is the only option pairing automated scanning with human expert review, useful when you need a senior engineer to verify findings and audit business logic. Flarehawk sits at the infrastructure layer, processing Cloudflare telemetry through ML models that learn your environment over time, which makes it complementary to code-level tools rather than a direct substitute.
Pricing Comparison
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| Tool | Starting Price | Model | What You Get |
|---|---|---|---|
| PromptBrake Enterprise | $499/mo | Subscription | 30 scans per billing period, 138 checks, JSON + PDF exports, CI keys, release gating |
| Vibio | £4.99/scan; £9.99/mo for 4 scans | Per scan or subscription | 50+ deterministic checks, AI deep review, fix packs |
| CodeWatchdog | $20/scan | Per-scan | AI scan with 0-100 score, PDF report; human review from $499 |
| Flarehawk Detect | $749/mo | Subscription | Cloudflare telemetry ingestion, automated investigations, Slack alerts |
| EarlyCore | Contact sales | Enterprise | Pre-deploy scanning + production monitoring, Bedrock/Gemini Enterprise Agent Platform support |
| Joinble AI KYC | Contact sales | Enterprise | Deepfake detection, biometric verification, custom KYC flows |
For teams running fewer than 30 LLM endpoint scans per billing period, PromptBrake Enterprise at $499/mo covers focused AI security testing. Vibio is the clear budget winner if you need broader application security, at £4.99 per scan or £9.99/mo for 4 scans. CodeWatchdog works best for one-off audits where the $20 per-scan model avoids monthly commitments.
When to Consider Switching
Consider a different arrangement if your team needs more than the self-hosted plan’s included 30 validations per month. PromptBrake describes larger agreements as scaling by protected systems, environments, validation volume, evidence retention, governance needs, and support level.
PromptBrake’s self-hosted plan is designed for private validation: the Enterprise Runner executes supported workflows in your infrastructure, while the portal manages licenses and quota. Prompts, credentials, responses, and evidence stay in your environment; only license checks and quota usage reach PromptBrake. Teams that require a different operating model should evaluate whether that deployment boundary and license-based setup fit their release process.
Migration Considerations
Switching from PromptBrake to another tool requires evaluating three factors: test coverage overlap, CI/CD integration depth, and result format compatibility. , so moving to a general-purpose scanner like Vibio means you gain breadth (auth, headers, dependencies, CI pipelines) but may lose depth on LLM-specific attacks like multi-turn escalation and long-context refusal decay.
If you use PromptBrake's CI release gating through its API keys in GitHub Actions or GitLab CI, verify that your target tool offers equivalent pipeline integration. Vibio provides fix packs with Cursor prompts and PRs but does not advertise CI gate endpoints. EarlyCore and Flarehawk support CI/CD workflows but through different mechanisms. Plan for a 1-2 week parallel-run period where you run both tools simultaneously to compare detection rates. Export your existing PromptBrake scan results as JSON or PDF before canceling, as these reports serve as your security baseline for comparison with the new tool's findings.