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Alternatives · 2026

The best Microsoft Custom Neural Voice alternatives

The rest of Best AI Guardrail Software, in this site's order: each with what it costs, where it runs and its record score.

1
PromptGuard

It suits application teams that want to inspect LLM requests before they reach a provider, including for prompt injection, PII, or data leakage risks.

WebWindowsMac+4 $19 a month Record5.7 Visit
2
NVIDIA NeMo Guardrails

NeMo Guardrails is for developers and teams building LLM applications that need configurable policy checks.

WindowsMacLinux+2 Free plan Record5.4 Visit
3
Enkrypt AI Guardrails

It is intended for enterprises securing AI deployments, AI safety researchers and people building safer AI systems.

WebAPISelf-hosted $1,608 a year Record5.2 Visit
4
CyberSecEval

CyberSecEval suits people evaluating cybersecurity risks or defensive behavior in large language models.

WebMacLinux+2 Free plan Record5.1 Visit
5 AndroidiPhone & iPadWindows Free plan Record5.0 Visit
6
OpenSecureAI Prompt Firewall

Prompt Firewall suits AI application teams shipping LLM features and developers building agents.

WebSelf-hosted $49 a month Record4.7 Visit
7 WebAPISelf-hosted Free plan Record4.6 Visit
8
VotalAI

VotalAI is aimed at enterprise AI teams, including platform and security engineers, that need policies and visibility around agent prompts, outputs,…

WebAPISelf-hosted Free plan Record4.5 Visit
9
Guardrails AI

It may suit teams building chatbots, RAG pipelines, or agents that need checks for risks such as PII exposure or jailbreaks.

WebAPISelf-hosted Free plan Record4.3 Visit
10
Openlayer Guardrails

It suits engineering, AI, security, compliance, and finance teams that need to enforce policies on live AI traffic.

WebAPISelf-hosted Free plan Record4.3 Visit
11
LLM Guard

It is aimed at developers building LLM applications who want self-hosted prompt and output scanners or documented integrations.

LinuxAPISelf-hosted Free plan Record4.2 Visit
12 WebAPISelf-hosted $10 a month Record4.2 Visit
13
PII Firewall

It is suited to teams handling sensitive information in healthcare, finance, or legal workflows that use LLMs.

LinuxSelf-hosted Free plan Record4.2 Visit
14
Pangea AI Guard

It suits teams protecting direct LLM interactions, agent exchanges, or RAG pipelines.

Browser extensionAPISelf-hosted Free plan Record4.1 Visit
15
HiddenLayer AI Runtime Security

It is presented for enterprise security teams protecting production AI applications, autonomous agents, and coding-agent workflows.

WebLinuxAPI+1 — Record3.9 Visit
16 Web Free plan Record3.8 Visit
17
OpenAI Guardrails

It suits developers adding configurable safety checks to LLM applications, including teams using OpenAI clients, the Agents SDK, Azure OpenAI, or…

WebAPISelf-hosted — Record3.7 Visit
18
Check Point AI Guardrails

It is aimed at organizations governing enterprise LLM applications and agent interactions.

WebAPISelf-hosted — Record3.6 Visit
19 Web $100 a month, billed yearly Record3.3 Visit
20
Amazon Bedrock Guardrails

Amazon Bedrock Guardrails suits users seeking cloud-based checks for model interactions, including prompt attacks, sensitive information and output…

Web $0.07 usage-based Record3.2 Visit
21 — Record2.3 Visit
22 — Record2.3 Visit