Comparison

Privian vs LiteLLM

LiteLLM and Privian sit on the same request path but optimise for different axes — routing breadth and self-hosted control versus privacy-by-default and one documented data path.

What is the difference between Privian and LiteLLM?

Choose LiteLLM if you want an open-source proxy and provider abstraction layer that normalises many model APIs into one interface, and you are willing to self-host and operate it. Choose Privian if you want a hosted, privacy-first LLM gateway that masks supported personal and sensitive data before prompts reach the model, with one documented data path for enterprise review.

Last reviewed: August 11, 2026. Claims about LiteLLM on this page are based on LiteLLM's public documentation as of the last-reviewed date and may have changed since — verify current capabilities directly with the vendor during evaluation.

Quick summary

At a glance

Choose Privian if you want a hosted, privacy-first LLM gateway that masks supported personal and sensitive data before prompts reach the model, with one documented data path for enterprise review.

LiteLLM

Choose LiteLLM if you want an open-source proxy and provider abstraction layer that normalises many model APIs into one interface, and you are willing to self-host and operate it.

Privian

Choose Privian if you want a hosted, privacy-first LLM gateway that masks supported personal and sensitive data before prompts reach the model, with one documented data path for enterprise review.

Definitions

What each product is

Comparison

Side-by-side comparison

Grounded in publicly available product positioning. Where we are not confident, we say so.

CapabilityLiteLLMPrivian
Primary positioningOpen-source LLM proxy and provider abstraction layer, self-hostedPrivacy-first LLM gateway with prompt-level data protection
Privacy-first routingNot a stated focusYes, core design goal
PII maskingNot a stated focusYes — supported personal/secret entities masked before provider call
Prompt-level data protectionNot a stated focusYes — deterministic placeholders, rehydrated in the response
BYOKProvider keys configured and held in your own deploymentYes — provider keys stored AES-GCM, decrypted in-process
Gateway modelSelf-hosted proxy or library — you operate and secure itHosted gateway with a small JSON contract
Prompt injection protectionNot a stated focusNo claim
Tool / function callingYes, where the underlying provider supports itNot currently supported
Native streamingYes, where the underlying provider supports itNot currently supported (artificial chunking only)
Open sourceYes (MIT)Closed source (beta)
ObservabilitySelf-hosted logging, spend tracking and callbacks you configureStructural counters only; raw prompts never persisted
Pricing modelSee vendor pricingUsage-based plans, see /pricing
Enterprise orientationSee vendor docsDesigned for privacy-sensitive teams; HIPAA/SOC 2/PCI not claimed
Best fitEngineering teams that want self-hosted provider abstraction and routing breadthTeams that need supported PII masking and provider-agnostic BYOK routing

Architecture

Architecture differences

The application sends a raw prompt to the gateway. The gateway replaces sensitive values with placeholders and forwards the masked prompt to the LLM provider. The provider returns a response with placeholders. The gateway rehydrates placeholders to the original values before returning the response to the application. The provider never sees original values.ApplicationRaw promptPrivian gatewayMask · Route · RehydrateLLM providerSees masked prompt onlypromptmasked promptresponse w/ placeholdersrehydratedBYOK trust boundary
Prompt path through a privacy-first gatewayOriginal values never cross the BYOK boundary.

LiteLLM

LiteLLM's architecture is library-first and self-hosted: a Python package plus an optional proxy server you deploy and operate yourself. Routing, fallbacks, budgeting and provider credentials all run inside your own infrastructure, which is also where the operational and security responsibility for that layer sits.

Privian

Privian sits between your application and the model provider. Each request runs through detection → masking → BYOK provider call → rehydration in a single in-memory pass. The data plane is designed around minimising what reaches the provider rather than around routing breadth or orchestration.

Privacy & security

Privacy and security positioning

What Privian optimises for

  • Prompt-level data protection
  • Supported PII and sensitive-value masking
  • Privacy-first routing with BYOK
  • No raw-prompt persistence; structural observability only

What Privian does NOT claim

  • Prompt injection or jailbreak defence
  • HIPAA / SOC 2 / PCI certification
  • Tool / function calling security guarantees
  • Downstream model behaviour guarantees

When to choose

When to choose LiteLLM

  • Breadth of provider routing across 100+ models matters more than data minimisation
  • You want to self-host the proxy and keep full infrastructure control
  • You need streaming or tool/function calling today, not in a future beta
  • An open-source, self-hostable license is a hard requirement

When to choose

When to choose Privian

  • You want supported personal and sensitive data masked before it leaves your boundary, not just routed
  • You want a hosted gateway with one documented data path, rather than an operational responsibility you assemble yourself
  • An enterprise buyer or security reviewer needs evidence of what leaves your systems and who holds credentials
  • You want BYOK with encrypted-at-rest keys and zero raw-prompt retention out of the box

Framework

Evaluation decision

  1. 01

    Assess LiteLLM

    Choose LiteLLM if you want an open-source proxy and provider abstraction layer that normalises many model APIs into one interface, and you are willing to self-host and operate it.

  2. 02

    Assess Privian

    Choose Privian if you want a hosted, privacy-first LLM gateway that masks supported personal and sensitive data before prompts reach the model, with one documented data path for enterprise review.

  3. 03

    Validate scope

    Confirm required capabilities and current limitations against the evaluation criteria.

Transparency

Honest limitations

Privian is in active development. Listing what it does not do today is part of how we earn trust — expect this list to shrink over time.

  • No tool / function calling in the current beta
  • No native provider token streaming yet (stream: true is artificially chunked)
  • No OpenAI SDK drop-in compatibility
  • No claim to detect or block prompt injection or jailbreaks
  • No Norwegian fødselsnummer masking yet
  • No custom user-defined entity types yet
  • No HIPAA / SOC 2 / PCI certifications at this time

FAQ

Frequently asked questions

Is Privian a LiteLLM alternative?
Privian is an alternative specifically for teams whose priority is masking sensitive data before it reaches the model, with a hosted gateway and one documented data path. If your priority is routing breadth across many providers or self-hosted control, LiteLLM is a capable, purpose-built open-source project and likely the better fit.
Is Privian a replacement for LiteLLM?
Only if your primary requirement is privacy-first routing rather than open-source provider abstraction. LiteLLM optimises for normalising many provider APIs and self-hosted control; Privian optimises for masking sensitive data before egress and giving a security reviewer one documented path.
Can Privian work alongside LiteLLM?
Yes. Some teams use LiteLLM as an in-cluster abstraction layer across providers and place a privacy-first gateway in front of the final egress hop to the model. The two are not mutually exclusive.
Who is LiteLLM for?
Teams that want an OpenAI-compatible interface across a large number of providers, prefer to self-host and modify open-source infrastructure, and need features such as streaming and tool calling that are already mature in the underlying providers.
Who is Privian for?
Teams whose primary constraint is what reaches the model, not how many providers they can route to — typically because a customer, security reviewer or compliance process is asking what data leaves the boundary before it reaches an LLM.
How does credential handling differ?
With a self-hosted LiteLLM proxy, you configure and hold provider credentials inside your own deployment, and you are responsible for how they are stored and rotated. Privian uses BYOK: your provider key is stored AES-GCM encrypted at rest and decrypted only in-process at request time, on Privian's hosted gateway.
How does retention differ?
LiteLLM's retention behaviour — logs, spend tracking, callback data — depends entirely on how you configure and operate your own deployment. Privian does not persist raw prompts or responses on its hosted gateway; only structural counters are retained for billing and observability.
Does Privian mask data before it reaches the provider?
Yes. Supported personal and sensitive entities are detected in the assembled prompt and replaced with deterministic placeholders before the request is forwarded to the model provider, then rehydrated in the response. LiteLLM's routing layer forwards the prompt as given; masking is not a stated focus of the project.
What does Privian not support yet?
Privian's current beta does not support streaming, tool/function calling, JSON mode, multimodal input or the Responses API. If you depend on any of these today, LiteLLM — or continuing to call the provider directly — is the more capable choice until Privian's beta covers them.
Does Privian block prompt injection?
No. Privian focuses on prompt-level data protection — masking supported personal and sensitive values before they reach the model. It does not claim to detect or block prompt injection or jailbreaks. If injection defence is your primary requirement, a dedicated LLM firewall is a better fit.
Does Privian support native streaming?
Not in the current beta. The gateway accepts stream: true and returns artificially chunked text, but it does not pass through native provider token streams yet.

Plans & pricing

See pricing for Privian — a privacy-first alternative to LiteLLM

BYOK, zero retention, prompt-level masking. Pricing is published transparently; Privian is in beta and limits may change.

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