TapPass vs Guardrails AI.
Guardrails AI is a Python library for validating LLM outputs. TapPass is a governance control plane that sits between your agents and the LLM with no code changes required.
TapPass vs Guardrails AI
| Capability | TapPass | Guardrails AI |
|---|---|---|
| Output validation | ✓ Output scanning + DLP | ✓ Validators (type, format, content) |
| Structured output enforcement | ◐ Via output constraints | ✓ RAIL spec, Pydantic models |
| Input scanning | ✓ PII, injection, secrets, classification | ◐ Custom validators (manual) |
| Prompt injection defence | ✓ Multi-layer + indirect + tool | ✗ Not available |
| Data classification | ✓ Multi-level with LLM-assisted classification | ✗ Not available |
| Tamper-evident audit trail | ✓ Cryptographically chained | ✗ Not available |
| Tool / function call governance | ✓ Permissions, scanning, zones | ✗ Not available |
| Human approval gates | ✓ Real-time workflows | ✗ Not available |
| Behavioural drift detection | ✓ Statistical anomaly detection | ✗ Not available |
| Cost tracking | ✓ Per-agent enforcement | ✗ Not available |
| EU AI Act compliance | ✓ Art. 9, 12, 13, 14 | ✗ Not available |
| Architecture | ✓ External control plane | ◐ In-process library |
| Open source | ◐ SDK is Apache 2.0 | ✓ Open source library |
Library vs. control plane
Guardrails AI: in-code library
A Python library inside your app. Great for structured outputs. But no external audit trail, no centralised policy, no cross-agent governance.
TapPass: external control plane
An API gateway between agents and LLMs. Centralised policy, centralised audit, centralised compliance. One governance layer for all agents.
Many agents, one pipeline
With Guardrails AI, each app manages its own validation. With TapPass, one pipeline governs all agents with one audit trail, one dashboard.
Output validation is step one. Governance is the full journey.
This comparison is about scope, not quality. Detection tools do detection well. TapPass is the layer that decides what an agent may do, holds the calls that need a person, and leaves a record you can hand to an auditor. If you already run Guardrails AI, TapPass sits in front of it rather than replacing it.