OpenSecureAI Prompt Firewall
- 1Runs onself-hosted, Web
- 2CostsFree plan · paid from $49/mo
- 3Deploymenthybrid
- 4Prompt injection defenseYes
- 5PII detectionYes
- 6Jailbreak detectionYes
- 7Custom policiesYes
- 8SDK languagesTypeScript
Overview
OpenSecureAI Prompt Firewall evaluates text before it reaches an LLM and applies a policy to allow, flag, or block it. Separate engines check for prompt injection and for PII or secrets. Under the described policy, injection or secrets trigger a block, while PII is redacted and flagged. The same middleware logic can be applied to model inputs and outputs. The live demonstration runs client-side and states that nothing is uploaded. Developers can use the open-source, dependency-free core as an npm package or CLI for applications and CI. The CLI reads files or standard input and can return a nonzero exit code when findings reach a selected threshold. An API key unlocks hosted detections for additional risks, including obfuscation or encoding evasions, indirect injection, tool abuse, and multilingual overrides. The LLM Gateway supports OpenAI, Anthropic, xAI, and Groq with bring-your-own-key operation; the company says gateway provider keys are never stored or logged. The Free plan is 0.00 USD per month and includes 2,000 API requests per month. Pro costs 49.00 USD per month and includes 50,000 monthly requests.
Who it is for
It suits AI application teams shipping LLM features and developers building agents. The npm package and CLI also suit teams applying text checks in applications or CI.
What is good
- Policy can block injection and secrets and flag redacted PII.
- Middleware can check model inputs and outputs.
- CLI supports file and standard-input scanning.
- Core engine and npm packages are open source and dependency-free.
- LLM Gateway supports four listed providers with bring-your-own-key.
What to know first
- Free plan allows 2,000 API requests per month.
- Pro costs 49.00 USD per month.
- Team features including seats and SSO are planned.
Verdict
Prompt Firewall offers both client-side checks and a developer package for application and CI use. Hosted detections require an API key, and Pro costs 49.00 USD per month.
OpenSecureAI Prompt Firewall plans and pricing
All plansCompared on AI guardrail software
- Free plan
- Yesopensecureai.com
- Paid from
- $49/moopensecureai.com
- Deployment
- hybridopensecureai.com
- Prompt injection defense
- Yesopensecureai.com
- PII detection
- Yesopensecureai.com
- Jailbreak detection
- Yesopensecureai.com
- Custom policies
- Yesopensecureai.com
- SDK languages
- TypeScriptopensecureai.com
Facts
- Purpose
- Prompt Firewall decides whether text is allowed, flagged, or blocked before it reaches an LLM.opensecureai.com · 2 Oct 2026
- Detection
- It combines prompt-injection detection, secret detection, and PII redaction under a user-controlled policy.opensecureai.com · 2 Oct 2026
- Policy behavior
- Injection or secrets trigger a block, while PII is redacted and flagged.opensecureai.com · 2 Oct 2026
- Client-side processing
- The live firewall demonstration is 100% client-side and states that nothing is uploaded.opensecureai.com · 2 Oct 2026
- Developer use
- The same engine is available as the free @opensecureai/firewall npm package and CLI for application and CI use.opensecureai.com · 2 Oct 2026
- CI integration
- The CLI can read files or stdin and return a nonzero exit code when findings meet a selected threshold.opensecureai.com · 2 Oct 2026
- Scanning engines
- The firewall runs separate prompt-injection and PII/secrets engines over text before applying policy.opensecureai.com · 2 Oct 2026
- Inputs and outputs
- OpenSecureAI describes the firewall logic as middleware usable on both model inputs and model outputs.opensecureai.com · 2 Oct 2026
- Open source model
- The core engine and npm packages are open source and dependency-free.opensecureai.com · 2 Oct 2026
- Hosted enhancements
- An API key unlocks hosted detections for obfuscation or encoding evasions, indirect injection, tool abuse, multilingual overrides, and de-obfuscation.opensecureai.com · 2 Oct 2026
- Model integrations
- The LLM Gateway supports OpenAI, Anthropic, xAI, and Groq providers with bring-your-own-key operation.opensecureai.com · 2 Oct 2026
- Credential handling
- OpenSecureAI states that gateway provider keys are never stored or logged.opensecureai.com · 2 Oct 2026
- Support
- The pricing page lists Community support for Free, Priority email support for Pro, and Priority plus SLA planned for Team.opensecureai.com · 2 Oct 2026
- Audience
- The product is positioned for AI application teams shipping LLM features to production and for developers building agents.opensecureai.com · 2 Oct 2026
- Security contact
- OpenSecureAI says it responds to responsible vulnerability reports within 48 hours.opensecureai.com · 2 Oct 2026
Company
- Founded
- 2026opensecureai.com · 28 Sept 2026
- Headquarters
- Global — Remote Firstopensecureai.com · 28 Sept 2026
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Sources
- opensecureai.com/tools/firewall· checked 2 Oct 2026
- opensecureai.com/docs· checked 2 Oct 2026
- opensecureai.com/pricing· checked 2 Oct 2026
- opensecureai.com· checked 2 Oct 2026
- opensecureai.com/contact· checked 2 Oct 2026