Enigma Vault NoPII and Skyflow both keep PII out of what LLM providers see and can restore real values when the answer comes back.
Skyflow is best for enterprises that need a governed data privacy vault for PII, files, and payments across AI and data platforms, while Enigma Vault NoPII is best for teams that want their app’s LLM calls protected with a base-URL change and a published price.
This guide compares the two for LLM and AI data only. For the broader platforms, see Enigma Vault vs Skyflow and Protecto vs Skyflow.
Enigma Vault NoPII vs Skyflow at a Glance
| Vendor | Enigma VaultNoPII | Skyflow |
|---|---|---|
| Best for | Teams protecting their own app’s LLM calls quickly | Enterprises governing sensitive data across AI, data platforms, and payments |
| How it protects prompts | Inline proxy: change the model base URL | Detect API calls before and after each model call |
| Entry price | Free, then $49/mo | Quote only |
| Free option | Lite: 1M protected tokens a month on real traffic | Try Account on request; no regulated data |
| Data types | Text in LLM traffic | Text, files, audio, and images |
| G2 | 5/5 (1) | 5.0/5 (2, across product listings) |
| Next step | Skyflow quotes after a demo or an AWS Marketplace private offer. |
Figures are as of 10 November 2026, from each vendor’s own site, docs, and terms, and from G2 and Capterra. For the vault side of this comparison, see Enigma Vault vs Skyflow, and for more options, our guide to Skyflow alternatives.
Enigma Vault NoPII vs Skyflow: Quick Verdict
Enigma Vault NoPII: A hosted LLM privacy proxy built for PII tokenization for LLMs. It detects PII, secrets, and API keys in prompts, system prompts, tool calls, and embeddings input, replaces them with consistent tokens before they reach the model provider, and restores real values in the response. It fronts 9 providers and costs nothing to start.
Skyflow: A data privacy vault that now describes itself as runtime AI data control for datastores, models, and agents. Its Detect API de-identifies text, files, audio, and images across 60 entity types and more than 40 languages, and its re-identify call returns real values under policy. It is sold by quote on an annual contract.
I’d point you to Enigma Vault NoPII first if you’re shipping an AI feature and want it protected this quarter:
- You can protect every model call with one change to your client, instead of adding de-identify and re-identify calls around each one.
- You can test on real traffic for free, which Skyflow’s Try Account does not allow.
- You can budget the year from the pricing page.
Skyflow’s real strength is breadth and governance: one vault for PII, PHI, and card data, files and audio as well as text, policies by role, and deployment in your own cloud. It matters most if you’re an enterprise whose AI program is one part of a larger data governance effort.
Enigma Vault NoPII does one job inside the request path, so there is nothing to call at each boundary. The trade-off is that it only sees the text your applications route through it.
- Choose Enigma Vault NoPII if: Your scope is your own application’s LLM traffic, and speed, published pricing, and a free start matter.
- Choose Skyflow if: You need files, audio, and images covered, policy-based views across many teams, card data in the same vault, or deployment in your own AWS or GCP account.
Detect API Calls vs a Base-URL Change: What Each Asks of Your Engineers
The biggest practical difference is integration effort. Here is the work for one chat feature on each product, based on each vendor’s docs.
| Step | Enigma VaultNoPII | Skyflow |
|---|---|---|
| 1. Set up | Sign up and register your provider key | Request access, then create a vault and configure Detect |
| 2. Before the model call | Nothing: the request goes to the Enigma Vault NoPII base URL | Call deidentifyText through the Java, Node.js, Python, or Go SDK |
| 3. The model receives | Consistent tokens for each value | De-identified text with vault tokens or entity labels |
| 4. After the model call | Nothing: real values are restored in the response | Call reidentifyText, which returns values that policy allows |
| 5. Streaming | Tokens replaced as chunks arrive | Not described in the docs we could read |
| Next step | Each Detect call is a network call your code makes before and after the model. |
Skyflow describes this pattern as its LLM Privacy Vault. Its approach gives you control over exactly where de-identification happens, and it works for files and audio that never touch an LLM API. Enigma Vault NoPII’s approach removes the per-call code, and it is limited to the traffic you route through it.
Enigma Vault NoPII vs Skyflow Features Compared
Compare Enigma Vault NoPII and Skyflow on how they protect AI data, what they detect, how they govern reveals, and where they run. Skyflow covers more data types and more governance, whereas Enigma Vault NoPII covers LLM traffic with less work and a published price.
| Feature | Enigma VaultNoPII | Skyflow |
|---|---|---|
| Core approach | Reversible tokenization in a proxy | Vault with Detect for de-identify and re-identify |
| Integration | Base URL; LangChain, LangGraph, LlamaIndex, LiteLLM, Vercel AI SDK | SDKs for Java, Node.js, Python, and Go, plus APIs |
| Entity coverage | 11 on by default, 25+ opt-in, 14 credential families | 60 entity types, plus custom entities |
| Languages | Pattern-based types in most languages | More than 40 |
| Files, audio, and images | Not covered (text only) | CSV, DOC, PPT, PDF (redaction only), audio, and images |
| Protection modes | Consistent tokens | Tokenize, mask, redact, or synthetic data |
| Restoring values | Automatic in the response | Explicit re-identify call under policy |
| Who sees real values | The creating end user, a time-boxed grant, or an opt-in server key | Roles, row-level rules, and context-aware policy |
| Agents and MCP | Tool-call arguments and results tokenized | MCP data security announced August 2025 |
| Enterprise AI search | Embeddings endpoint tokenized | Skyflow for Glean, launched August 2026 |
| Training data | Not covered | Sanitization with referential integrity |
| Failure behavior | Fail-closed block, always | Not documented |
| Keys | Per-customer AES-256 keys | Skyflow-managed, BYOK, or BYOKMS |
| Deployment | Managed; self-hosted on Enterprise | SaaS, dedicated VPC, or BYOC on AWS or GCP |
| Card data | Detected in prompts; stored by Enigma Vault’s Card Vault | PCI DSS Level 1 vault in the same platform |
| Next step | Several of Skyflow’s detailed Detect docs require a login, so ask for the full entity and file lists. |
Here is how the biggest differences play out in practice.
Detection, Reveals, and Deployment: Enigma Vault NoPII Against Skyflow
Detection Breadth
Skyflow’s Detect docs cover 60 entity types and more than 40 languages, across text, office files, PDFs, audio transcripts, and images, including faces, logos, and signatures. If your AI data includes call recordings or scanned documents, that breadth matters.
Enigma Vault NoPII scans text: messages, system prompts, tool-call arguments, tool results, and embeddings input. It turns on 11 entity types by default, lets you add more than 25 per workspace, and catches 14 families of credentials in the same pass.
Who Gets the Real Values Back
Skyflow re-identifies by policy: roles, row-level rules, and context decide whether a caller gets the real value, a masked value, or nothing. That suits a company where many teams read the same AI output.
Enigma Vault NoPII reveals a value only to the end user who created the token, within their own session, under a time-boxed reveal grant, or to a server key with an opt-in scope. Every attempt is logged, refusals included, and if the reveal cache is unavailable, reveals are refused rather than allowed.
Agents, Search, and Training Data
Skyflow positions itself between your data sources, MCP servers, agents, and models. It announced MCP data security in August 2025, launched Skyflow for Glean in August 2026, and sanitizes training data while keeping referential integrity.
Enigma Vault NoPII covers agents you build by tokenizing tool-call arguments and results, and it tokenizes text sent to the embeddings endpoint, so a vector index holds tokens and search still works. It does not sanitize training sets or govern third-party search tools.
Latency and the Extra Call
Skyflow says every prompt and response passes through a detection and tokenization step that adds a network call. Enigma Vault NoPII also adds a hop, since it is a proxy, but it replaces tokens as streamed chunks arrive so users see text as it is generated.
Deployment and Keys
Skyflow offers multi-tenant SaaS, Virtual Private Skyflow in a dedicated VPC, and bring-your-own-cloud in your AWS or GCP account, with Skyflow-managed keys, BYOK, or BYOKMS. Enigma Vault NoPII runs as NoPII Cloud with per-customer keys, and its self-hosted edition runs the proxy and vault in your environment on an Enterprise license.
Where Plaintext Stops: Enigma Vault NoPII Browser SDK vs Skyflow Client SDKs
Both vendors can keep real values away from more than the model provider. Skyflow offers client-side SDKs for JavaScript, React, React Native, iOS, and Android for its vault, while Enigma Vault NoPII offers a browser SDK that tokenizes a message before it leaves the user’s page.
| Question | Enigma VaultNoPII | Skyflow |
|---|---|---|
| Does the model provider see plaintext? | No, on every plan | No, once your code calls Detect |
| Can your backend avoid plaintext? | Yes, with the browser SDK in tokens-only mode (preview) | Through its client-side SDKs and vault |
| Who sees the reply in plaintext? | Only the user it belongs to, revealed in their browser | Callers that policy allows on re-identify |
| Status | Proxy live; browser SDKs in preview, not yet on npm or PyPI | Server SDKs GA for Java, Node.js, Python, and Go |
| Next step | No option removes your frontend from scope, since page JavaScript can read what users type. |
If you need production-ready client SDKs today, Skyflow’s are generally available. If you only need the model provider kept away from plaintext, Enigma Vault NoPII’s proxy does that now with no SDK at all.
Access to Real Values: Enigma Vault NoPII vs Skyflow
Skyflow governs reveals with roles, row-level rules, and context, which suits many teams reading the same data. Enigma Vault NoPII starts from who created each token, which suits a product where each user should only ever see their own data.
| Access control | Enigma VaultNoPII | Skyflow |
|---|---|---|
| Default rule | Revealed only to the end user who created the token, or within their session | Policy-based access by role, row, and context |
| Temporary access for support staff | Reveal grants, 60 seconds to one day, with a recorded reason (Business and above) | Ask how temporary access is granted |
| Logging | Every reveal attempt, refusals included, with user, key, and client IP | What was detected, replaced, and which policy applied |
| Keys | Secret, publishable, and device keys; privileged scopes dropped on client keys | Skyflow-managed keys, BYOK, or BYOKMS |
| Teams and tenants | Workspaces with Owner, Admin, and Member roles from Growth; SSO from Business | Vaults and roles across the organization |
| If the access service is down | Reveals are refused, never allowed | Ask |
| Next step | Skyflow offers customer-managed keys; Enigma Vault NoPII uses per-customer AES-256 keys. |
Embeddings and RAG: Tokens in the Vector Index
A vector database is a second copy of your customer data. Enigma Vault NoPII proxies the embeddings endpoint the same way it proxies chat: every text is tokenized before it reaches the provider, and the vectors come back unchanged.
Because tokens are consistent, a search for a customer finds every document that mentions them. This works for keys registered with OpenAI, Mistral, Together, Fireworks, and Gemini, and similar-looking names do not produce similar tokens, so match and deduplicate names before they reach the proxy.
Skyflow takes a different route for enterprise search: Skyflow for Glean sanitizes data on ingest and rehydrates results by policy, so different users see different values. That suits a company-wide search tool, whereas Enigma Vault NoPII suits the RAG pipeline inside your own product.
Reading Skyflow’s Terms Before You Sign
Skyflow publishes no prices, but its Terms of Service, updated 15 July 2026, tell you a lot about how you will be billed and what is warranted. These are the clauses worth reading.
| Clause | What it says | What to ask |
|---|---|---|
| Pricing unit | Fees are calculated on Unique Identifiers: a person, entity, account number, or other identifier | How active and inactive identifiers are counted for AI traffic |
| Invoicing | Annually in advance, net 30, unless the order form says otherwise | Whether monthly billing is possible |
| Renewal | Auto-renews yearly, with a 5% increase after the initial term | A cap or waiver on the uplift |
| Detection accuracy | No warranty that detection will find or remove all PII, or that re-identification returns identical data | Results from a proof of concept on your data |
| Try Account | Free evaluation; no PHI, PCI, or regulated data; no support or SLA; Skyflow staff may access the data | A paid pilot if you must test real data |
None of these clauses is unusual for enterprise software. They do mean you cannot test Skyflow on real customer data, or know your price, before a sales conversation.
Enigma Vault NoPII’s plans, overage rates, and annual prices are on its pricing page. Lite is monthly and free, and Starter, Growth, and Business can be paid yearly at $550, $2,700, and $5,500.
Enigma Vault NoPII vs Skyflow Pricing
Enigma Vault NoPII Plans and Prices
| Enigma Vault NoPII plan | What you get |
|---|---|
| Lite, free | 1M protected tokens a month, hard cap, no card; 1-day token retention |
| Starter, $49/mo | 50M tokens, then $1.00 per million; 30-day retention |
| Growth, $249/mo | 500M tokens, then $0.80 per million; retention up to permanent; workspaces |
| Business, $499/mo | 2B tokens, then $0.60 per million; SSO, reveal grants, staff access log |
| Enterprise, custom | SLA, BAA, custom retention, and the self-hosted edition |
Detection, tokenization, restore, and the fail-closed block are the same on every plan. | |
How Skyflow Prices Its Plans
Skyflow lists no plans or prices. Its pricing path leads to a demo, and its AWS Marketplace listing offers only a private offer or a demo request. Under its terms, the price depends on how many Unique Identifiers you protect, billed yearly in advance.
Enigma Vault NoPII vs Skyflow Cost at Four Stages
| Stage | Enigma VaultNoPII | Skyflow |
|---|---|---|
| Trying it out | Free on Lite, with real traffic | Try Account, test data only |
| First production feature | $49/mo (Starter) | Quote, invoiced annually |
| Growing workload | $249/mo (Growth) | Quote, by Unique Identifiers |
| Large or regulated deployment | $499/mo (Business), or Enterprise with self-hosting | Quote, with VPC or BYOC |
| Next step | Skyflow counts identifiers and Enigma Vault NoPII counts protected tokens. |
The Practical Takeaway: If your team needs to prototype PII protection for an LLM feature this week, Enigma Vault NoPII’s free tier lets you start on real traffic today. Skyflow requires a request, a demo, and a quote, and its free account cannot hold regulated data.
Enigma Vault NoPII vs Skyflow Security and Compliance
Skyflow has the longer certification list today, including ISO 27001:2022. Enigma Vault NoPII runs on Enigma Vault’s platform, which is PCI DSS Level 1 and SOC 2 Type II, and offers a BAA on Enterprise.
| Control | Enigma VaultNoPII | Skyflow |
|---|---|---|
| PCI DSS | Level 1 Service Provider (Card, Data, File Vault in scope) | Level 1 |
| SOC 2 | Type II | Type II |
| ISO 27001 | In progress | ISO 27001:2022 |
| HIPAA | BAA on Enterprise | “Assessed and eligible” |
| GDPR | Erasure by token purge, with the proof kept in the log | “Assessed and compliant” |
| Audit log | Token, masked value, entity, provider, and model; never plaintext | What was detected, replaced, and which policy applied |
| Next step | If ISO 27001 is a hard requirement today, Skyflow meets it. |
Enigma Vault NoPII vs Skyflow Reviews
Independent reviews are thin for both. Skyflow has two on G2, spread across its product listings, and Enigma Vault NoPII has one. Neither is reviewed on Capterra.
| Source | Enigma VaultNoPII | Skyflow |
|---|---|---|
| G2 | 5/5 from 1 review | 5.0/5 from 2 reviews |
| Capterra | No listing | No listing |
| What reviewers mention | Context kept after tokenization, two-line setup, a clunky interface | Confidential payment data, HIPAA alignment, occasional slowness |
| Next step | Skyflow’s PII vault and GenAI listings have no reviews yet. |
Skyflow’s two reviews are on its Payments Data Privacy Vault and Healthcare Data Privacy Vault, not its AI products, so neither speaks to LLM use. With so little review data on either side, the best evidence is a test on your own prompts.
Does Skyflow Compare Itself to Enigma Vault NoPII?
No. Skyflow’s sitemap lists comparison pages against Protegrity, Very Good Security, and Shift4, all about vaults and payments, and none about LLM privacy proxies. Skyflow’s AI pages position it against the idea of sending raw data to models rather than against a named product. That leaves this page as one side’s view, so ask Skyflow to show its LLM workflow on your traffic in a proof of concept.
Enigma Vault NoPII vs Skyflow by Industry
For LLM projects, the industry decides what data is in the prompt and how much governance sits around it. Here is how the choice usually falls.
Healthcare and Life Sciences
Ambient documentation, chart abstraction, coding, and prior authorization all turn patient records into prompts. Enigma Vault NoPII tokenizes patient identifiers before the transcript or note reaches the model and restores them in the draft, with a BAA on Enterprise.
Skyflow’s Detect also handles audio and scanned documents, and its healthcare vault suits large health systems governing PHI across many teams, with HIPAA described as “assessed and eligible.”
Best fit: Enigma Vault NoPII for text-based clinical AI features; Skyflow for large health platforms with audio and document pipelines.
Fintech and Payments
- Skyflow: A PCI DSS Level 1 vault that keeps card data, PII, and AI governance in one platform.
- Enigma Vault NoPII: Fraud narratives and support copilots, where the same account must be the same token across a multi-step prompt.
- Card Storage: Decide whether storing cards is part of the same project. If it is, Skyflow or Enigma Vault’s Card Vault handles it.
Best fit: Skyflow when one vault must hold cards and AI data together; Enigma Vault NoPII for LLM features alone.
Legal and Professional Services
Chronologies, demand letters, and document review send entire client files to a model. Enigma Vault NoPII keeps a thousand-page chronology coherent because the same claimant is the same token on every page, and its embeddings endpoint keeps review indexes free of names.
Best fit: Enigma Vault NoPII.
Enterprise Software and Data Platforms
| Need | Better match |
|---|---|
| Governed views of AI data across Snowflake, Databricks, and Glean | Skyflow |
| Sanitizing training data with referential integrity | Skyflow |
| PII out of one product’s chat, agent, or RAG feature this quarter | Enigma Vault NoPII |
Best fit: Skyflow for estate-wide governance; Enigma Vault NoPII for product AI features.
Startups at Any Stage
A startup rarely has the budget or timeline for an annual, quote-based contract. Enigma Vault NoPII’s free tier and $49 Starter plan let you pass a customer’s security review before Skyflow’s sales process would have started.
Best fit: Enigma Vault NoPII.
Questions to Ask Before You Choose Enigma Vault NoPII or Skyflow
| Question | Enigma VaultNoPII | Skyflow |
|---|---|---|
| What will it cost at our volume? | Published, by protected tokens | Quote; ask how Unique Identifiers are counted |
| Can we test with real data? | Yes, on Lite | Not on the Try Account; ask about a pilot |
| How much code changes? | The model client’s base URL | De-identify and re-identify calls around each model call |
| Which data types are covered? | Text in LLM traffic | Ask for the full entity, language, and file lists |
| Can you sign a BAA? | On Enterprise | Ask for a signed BAA; HIPAA is “assessed and eligible” |
| How do we leave? | Ask for the export process in writing | Ask for the export process in writing |
| Next step | Put the same questions to both vendors. |
Moving From Skyflow Detect to Enigma Vault NoPII
- Map Your Detect Calls: List every deidentifyText and reidentifyText call around a model call, and every place that stores Skyflow tokens.
- Keep What Enigma Vault NoPII Does Not Cover: Files, audio, training data, and card storage stay with Skyflow or move to another product, such as Enigma Vault’s File Vault.
- Route One Provider First: Point one model client at the Enigma Vault NoPII base URL, remove the Detect calls on that path, and compare what reaches the provider.
- Run Both for a Few Weeks: Then cut over, and agree the exit terms with Skyflow before renewal.
If you want help mapping your AI data path, book a migration call, or read our guide to LLM privacy proxies.
Final Verdict: Enigma Vault NoPII or Skyflow?
Skyflow is a strong platform for an enterprise that needs one governed vault across AI, data platforms, and payments, with files and audio covered and deployment in its own cloud. If that is your program, it belongs on your shortlist, and I would tell you so.
If what you need is to keep PII out of your application’s LLM calls, Enigma Vault NoPII does that with a base-URL change, real values back in every response, a price you can read, and a free tier you can test with real traffic. It covers text only, so if your AI data is mostly audio or documents, start with Skyflow.
See it on your own data: try the Enigma Vault NoPII live demo or compare plans and start free.
See what reaches your model provider.
Book a demo to map your AI data path, or explore Enigma Vault NoPII first. The free tier covers one million protected tokens a month.
More comparisons: Enigma Vault NoPII vs Portkey, Enigma Vault NoPII vs Nightfall, Protecto vs Skyflow, and Skyflow vs VGS.
How We Researched This Comparison
We checked every fact on 10 November 2026. Skyflow facts come from skyflow.com, its product and security pages, its documentation and blog, its press releases, and its Terms of Service updated 15 July 2026. Review data comes from G2 and Capterra, and Enigma Vault NoPII facts come from our own product and pricing pages.
Enigma Vault publishes this page, so read it as a vendor-written comparison. Where Skyflow is the stronger product, we say so. If something here is out of date, tell us through our contact page and we will check it.
