Alternatives to PromptBrake

PromptBrake: Automated AI security testing for LLM APIs and chatbots. 8 products similar to PromptBrake, compared on pricing, free tier, API, MCP server, SDK and open source. 6 of 8 have a free tier, 8 of 8 have an API, 5 of 8 offer an MCP server, 5 of 8 are open source.

Helicone
AI Gateway & LLM Observability
Monitoring & observability free tierAPISDKopen source
Braintrust
The active observability platform for agents
Monitoring & observability free tierAPIMCPSDK
Portkey
Production stack for Gen AI builders: AI gateway, observability, guardrails, governance, and prompt management.
AI models & inference free tierAPIMCPSDKopen source
Airbrake
Error monitoring and performance insights for your entire app stack.
Monitoring & observability APISDK
LangWatch
Agent observability and evals platform for tracing, testing, routing and governing LLM calls
Monitoring & observability free tierAPIMCPSDKopen source
Loadmill
AI test automation platform using computer-using agents for mobile and web testing
Testing & QA API
Langfuse
Open Source Agent Evals & Observability
Monitoring & observability free tierAPIMCPSDKopen source
Respan
The AI router with built-in observability & automated evals.
Monitoring & observability free tierAPIMCPSDKopen source

Side by side

Product	Pricing	Free tier	API	MCP server	SDK	Open source
PromptBrake	Freemium	yes	yes	yes	no	no
Helicone	Freemium	yes	yes	no	yes	yes
Braintrust	Freemium · from $0	yes	yes	yes	yes	no
Portkey	Freemium · from $49/month	yes	yes	yes	yes	yes
Airbrake	Usage-based · from 19	no	yes	no	yes	no
LangWatch	Freemium	yes	yes	yes	yes	yes
Loadmill	—	—	yes	—	—	no
Langfuse	Freemium	yes	yes	yes	yes	yes
Respan	Freemium · from $0	yes	yes	yes	yes	yes

Facts come from each product's own website, or from its verified owner when they have edited the listing. Each product page shows when it was last verified and how it was extracted. Similarity comes from the products' descriptions.

API

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