Compare
When Regulus is the right call. When it isn't.
Four honest comparisons against the alternatives most regulated teams consider. Each page lists when to pick Regulus, when to pick the alternative, and the decision criteria in between.
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vs Guardrails libraries
Regulus vs NeMo Guardrails / Guardrails AI / generic guardrails libraries
Guardrails libraries operate on the prompt/response boundary. Regulus operates on the full agent trajectory — purpose limitation, residency, dual-control, audit envelopes.
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vs LangChain alone
Regulus vs LangChain alone
LangChain is an agent-building toolkit. Regulus is a compliance plane targeting Google ADK as primary runtime. An alt-runtime module wraps LangChain4j; new work lands on ADK first.
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vs Vertex AI alone
Regulus vs Vertex AI alone (no compliance plane)
Vertex AI is the runtime. Org Policy + VPC-SC + Assured Workloads handle the data plane. The agent's decision plane — purpose limitation, audit, kill switch — is the layer Regulus fills.
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vs Building in-house
Regulus vs building the compliance plane in-house
Every regulated team has built at least the audit-log and kill-switch pieces themselves. Here's where the gaps usually show up after 6–12 months, and where Regulus differs.