Alternatives
Open Policy Agent alternatives: 7 documented options compared (November 2026)
The main documented alternatives to Open Policy Agent are Guardrails AI, Invariant, Lakera Guard, Ledger Agent Intent, LiteLLM Proxy, NeMo Guardrails, and Walmart Agent Gateway.
Last verified 2026-11-03
Earlier records in this comparison were checked from 2026-10-20 through 2026-11-03.
Comparison
A cell reads not documented when the directory has no sourced value. The first row is this listing. The other rows are alphabetical by name.
| Listing | Status | Open source | Tags | Custody model | Rail or protocol | Per-payment cap | Human approval above a threshold | Revoke | Who can raise the cap |
|---|---|---|---|---|---|---|---|---|---|
| Open Policy AgentThis listing | Live | Yes | policy, mandates, rego | not documented | not documented | not documented | not documented | not documented | not documented |
| Guardrails AI | Live | Yes | guardrails, validation, policy | not documented | not documented | not documented | not documented | not documented | not documented |
| Invariant | Live | Yes | guardrails, policy, traces | not documented | not documented | not documented | not documented | not documented | not documented |
| Lakera Guard | Live | No | guardrails, tool-calls, policy | not documented | not documented | not documented | not documented | not documented | not documented |
| Ledger Agent Intent | Beta | No | approvals, signers, intents | User signer, agent has no wallet keys | onchain transfer | No | Partial | Yes | Wallet or owner signature |
| LiteLLM Proxy | Live | Yes | budgets, spend-limits, guardrails | not documented | not documented | not documented | not documented | not documented | not documented |
| NeMo Guardrails | Live | Yes | guardrails, policy, tool-calls | not documented | not documented | not documented | not documented | not documented | not documented |
| Walmart Agent Gateway | Beta | No | mcp, commerce, spend-limits | not documented | not documented | not documented | not documented | not documented | not documented |
How to choose
Open Policy Agent is compared with the other listings in Governance and mandates.
Tags on Open Policy Agent are policy, mandates, rego.
Other tags differ across the table.
Status is Live for Guardrails AI, Invariant, Lakera Guard, LiteLLM Proxy, NeMo Guardrails, and Open Policy Agent. Status is Beta for Ledger Agent Intent and Walmart Agent Gateway.
Open source is yes for Guardrails AI, Invariant, LiteLLM Proxy, NeMo Guardrails, and Open Policy Agent. Open source is no for Lakera Guard, Ledger Agent Intent, and Walmart Agent Gateway.
Custody model for Open Policy Agent is not documented. Other values are User signer, agent has no wallet keys for Ledger Agent Intent.
The table has 8 rows. The first row is Open Policy Agent. The other 7 rows are alphabetical by name. This page does not score listings.
Listings
- Open Policy AgentThis listing
- Guardrails AIAlternative
- InvariantAlternative
- Lakera GuardAlternative
- Ledger Agent IntentAlternative
- LiteLLM ProxyAlternative
- NeMo GuardrailsAlternative
- Walmart Agent GatewayAlternative
Comparisons
Questions
- What are the documented alternatives to Open Policy Agent?
- The main documented alternatives to Open Policy Agent are Guardrails AI, Invariant, Lakera Guard, Ledger Agent Intent, LiteLLM Proxy, NeMo Guardrails, and Walmart Agent Gateway.
- How were these alternatives chosen?
- They are the other listings in Governance and mandates. A page is built only when that set has at least 3 other listings. Peers are alphabetical by name. The page does not score listings and does not read sponsor records.
- What does the phrase not documented mean?
- The phrase not documented means the directory has no sourced value for that field on that listing. The page does not fill a blank with a guess.
- Which fields are compared?
- The table columns are Status, Open source, Tags, Custody model, Rail or protocol, Per-payment cap, Human approval above a threshold, Revoke, and Who can raise the cap.
- Is there a comparison page or a gap note?
- Yes. Invariant vs Open Policy Agent pairs Open Policy Agent with one of these alternatives. Open Policy Agent has no gap note.
- When was this page updated?
- The newest date among the records used here is 2026-11-03.