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LLM Guard Alternatives

3 alternatives to LLM Guard — free and paid AI coding tools covering similar jobs, with pricing and standout strengths.

Looking for a LLM Guard alternative? LLM Guard is listed under SDK (open source). The 3 tools below cover similar jobs, closest matches first — the table compares pricing, license, and platforms so you can shortlist quickly, and each entry further down adds a fuller summary and a link to the full profile.

ToolPricingLicensePlatformsCategory
NeMo Guardrailsopen sourceApache-2.0Linux, macOS, WindowsSDK
PortkeyfreemiumMITWebPlatform
promptfooopen sourceMIT—Evaluation

Free and open-source alternatives to LLM Guard

LLM Guard alternatives in detail

  1. NeMo Guardrails

    open sourceApache-2.0Linux, macOS, WindowsSDK

    NeMo Guardrails is NVIDIA's open-source toolkit (Apache-2.0) for adding programmable guardrails to LLM apps. You define rails — input, dialog, retrieval, and output — in the Colang modeling language to detect jailbreaks and injection, keep conversations on allowed topics, filter retrieved context, and moderate or fact-check responses.

  2. Portkey

    freemiumMITWebPlatform

    Portkey is an AI gateway and LLMOps platform: route to 1,600+ LLMs through one OpenAI-compatible API with simple and semantic caching, automatic retries, fallbacks, and load balancing — plus observability (logs, traces, cost and latency), prompt management, guardrails, virtual keys, and budgets. The fast routing gateway is open source (MIT) and self-hostable; the hosted control plane is freemium.

  3. promptfoo

    open sourceMITEvaluation

    promptfoo is an open-source, config-driven CLI for evaluating and comparing LLM prompts and models side by side, plus a red-teaming mode that probes apps for prompt injection, jailbreaks, and unsafe output. Declarative YAML test cases make it CI-friendly and provider-agnostic.