Enigma Vault NoPII and Nightfall AI both keep PII away from AI models, Nightfall across your workforce and Enigma Vault NoPII inside your own application’s LLM calls.
Nightfall is best for security teams that need AI data loss prevention across browsers, endpoints, and SaaS apps, while Enigma Vault NoPII is best for product teams that need PII tokenization for LLMs, with real values restored in the response.
This guide compares the two on coverage, PII handling, pricing, compliance, and reviews. For Nightfall alongside other tools, see our best AI data security software for enterprises.
Enigma Vault NoPII vs Nightfall at a Glance
| Vendor | Enigma VaultNoPII | Nightfall AI |
|---|---|---|
| Best for | Teams building AI features that send customer data to LLM APIs | Security teams stopping data leaks across employees, SaaS, and AI tools |
| What it protects | Your application’s LLM traffic | Employee activity in AI apps, SaaS, browsers, and endpoints |
| What it does with PII | Tokenizes it and restores it in the response | Blocks, redacts, coaches, or alerts |
| Entry price | Free, then $49/mo | Developer API free to 3 GB a month; business editions by quote |
| How you start | Change your model client’s base URL | Deploy browser plugins, an endpoint agent, or SaaS connectors |
| G2 | 5/5 (1) | 4.6/5 (101) |
| Next step | Nightfall offers a proof of value instead of a self-serve trial for its business editions. |
Figures are as of 10 November 2026, from each vendor’s own site and docs, and from G2 and Capterra. For a wider view, see our list of the best AI data security software for enterprises.
Enigma Vault NoPII vs Nightfall: Quick Verdict
Enigma Vault NoPII: A hosted privacy proxy for LLM APIs. It tokenizes PII, secrets, and API keys before they reach the model provider, keeps the same token for the same value across a conversation, and restores real values in the response. It fronts 9 providers and is free for one million protected tokens a month.
Nightfall AI: A data loss prevention platform with browser plugins, a macOS and Windows endpoint agent, connectors for around a dozen SaaS apps, hooks for Claude and coding tools, an MCP gateway, and a Developer API for scanning text. Its business editions are priced per user by quote.
I’d point you to Enigma Vault NoPII first if you’re the team building the AI feature:
- Your product sends tickets, notes, or records to OpenAI, Anthropic, or Gemini, and the answer has to come back with real names in it.
- You want protection on every request without calling a scan API at each step.
- You want a published price and a free tier you can test with real traffic today.
Nightfall’s real strength is visibility across the workforce: what people paste into ChatGPT, upload to Drive, or post in Slack. It matters most if you’re a security team worried about shadow AI and data leaving through everyday tools, not about one application’s API calls.
Enigma Vault NoPII protects the LLM traffic your applications generate. It does not monitor employees, browsers, or endpoints, and we will tell you so if that is the problem you need solved.
- Choose Enigma Vault NoPII if: You are protecting the LLM calls your own software makes, and the response must keep working.
- Choose Nightfall if: You are protecting what employees share with AI tools and SaaS apps, and you want alerts, blocking, and coaching across the company.
Two Different AI Data Problems: Your App’s LLM Calls vs Your Employees’ AI Tools
Most confusion between these two products comes from the word “AI.” Here are the situations buyers bring us, and which product each one points to.
| Your situation | Enigma VaultNoPII | Nightfall |
|---|---|---|
| Your support product summarizes tickets with GPT | Covered: tokens go to the model, real values come back | Possible through the scan API, with your own code at each call |
| An agent in your product calls tools with customer data | Covered: tool-call arguments and results are tokenized | MCP gateway can block sensitive tool results |
| A sales rep pastes a customer list into ChatGPT | Not covered | Covered by browser plugins and the endpoint agent |
| An engineer pastes an API key into Claude Code | Not covered | Covered by IDE and CLI hooks on its Premier edition |
| Patient data sits in Slack or Google Drive | Not covered | Covered by SaaS connectors |
| You embed documents into a vector index | Covered: the embeddings endpoint is tokenized | Possible through the scan API before you embed |
| Next step | If most of your rows are employee activity, Nightfall is the closer fit. |
If your rows split across both columns, you have two problems, and one product will not solve both. Decide which risk your auditor or customer is asking about first.
How Enigma Vault NoPII and Nightfall Handle One Prompt
Enigma Vault NoPII sits in the request path and swaps values both ways, while Nightfall’s Developer API returns findings and a redacted copy that your code then decides what to do with.
- With Enigma Vault NoPII: Your app sends the prompt to the Enigma Vault NoPII base URL. Enigma Vault NoPII detects a name and an email, replaces each with a consistent token, sends the tokenized prompt to the provider, and restores the real values in the reply.
- With Nightfall’s API: Your app sends the text to the scan endpoint, up to 500 KB and 50,000 items per request. Nightfall returns findings and a redacted payload, such as “[CREDIT_CARD_NUMBER]”, and your app sends that to the model.
- When the reply comes back: Enigma Vault NoPII has already restored the values. With Nightfall, the placeholders stay in the reply unless you chose encryption, in which case your code decrypts with your own private key.
If tokenization ever fails, Enigma Vault NoPII blocks the request rather than sending unprotected data. That is the architecture, not a setting, and every decision lands in the audit log.
Enigma Vault NoPII vs Nightfall Features Compared
Compare Enigma Vault NoPII and Nightfall on how they protect AI data, where they run, and what they cover. Enigma Vault NoPII goes deep on one application’s LLM traffic, whereas Nightfall spreads across the tools a whole company uses.
| Feature | Enigma VaultNoPII | Nightfall |
|---|---|---|
| Core approach | Reversible tokenization in a proxy | Detection with block, redact, coach, or alert |
| Restore values in responses | Automatic, including streamed output | Not documented; RSA encryption option that you decrypt |
| Redaction styles | Consistent tokens | Mask, substitute a phrase, substitute the detector name, remove, or encrypt |
| Detectors | 11 on by default, 25+ opt-in, 14 credential families | Total not published; API lists dozens of types, plus custom regex, word lists, and fingerprints |
| Integration | Change the base URL; works with LangChain, LlamaIndex, LiteLLM, and Vercel AI SDK | Scan API with Python, Java, and Ruby guides |
| Employee AI tools | Not covered | ChatGPT, Gemini, Copilot, Claude, Perplexity, DeepSeek, and Grok |
| SaaS apps | Not covered | Slack, Google Drive, GitHub, Jira, Confluence, Zendesk, Salesforce, and more |
| Endpoints and browsers | Not covered | macOS and Windows agent; Chrome, Firefox, Safari, and Edge plugins |
| Agents and tools | Tool-call arguments and tool results tokenized | MCP gateway; Claude and IDE hooks |
| Model responses | Tokens restored as streamed chunks arrive | Monitored only in its IDE hooks |
| Failure behavior | Fail-closed block, always | Set by policy |
| Files and images | Not covered (text only) | File uploads scanned; asynchronous file scanning in the API |
| Deployment | Managed; self-hosted on Enterprise | SaaS; no on-premises option documented |
| Next step | Nightfall’s channels depend on edition; ask which are in your package. |
Here is how the biggest differences play out in practice.
Enigma Vault NoPII vs Nightfall on Redaction, Coverage, and Accuracy
Redaction Options in Nightfall’s Developer API
Nightfall’s Developer API, formerly called Firewall for AI, is the part your code calls directly. Nightfall’s redaction docs describe four ways to change a finding: mask characters, substitute a phrase, substitute the detector’s name in brackets, or encrypt with your RSA public key. Nightfall does not store your keys, so decryption is your job.
The first three are one-way. The fourth is reversible, but it hands your team the key management and the restore logic that Enigma Vault NoPII handles inside the proxy.
Restoring Real Values for Your Users
A support reply, a drafted letter, or a CRM note is only useful if it contains the right customer’s name. Enigma Vault NoPII keeps the mapping in Enigma Vault and restores it in every response.
Real values are revealed 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 reveal attempt is logged, refusals included.
Coverage Beyond Your Application
This is Nightfall’s home ground. Its browser plugins, endpoint agent, and SaaS connectors watch copy and paste, uploads, USB, printing, and cloud sync, and can block, redact, or coach in the moment. Each user license covers two endpoint devices.
Enigma Vault NoPII covers none of this. It only sees the requests your applications route through it, so if your main risk is employees, it is the wrong tool.
Claude, Coding Tools, and the MCP Gateway
Nightfall’s Claude Inference Hooks allow or deny a prompt before the model runs, on Claude Enterprise, and its docs say tool calls, tool responses, and model responses do not fire on that integration. Its IDE and CLI hooks for Cursor, Claude Code, and VS Code scan prompts and tool calls, with model responses monitored only. Its MCP gateway, announced in September 2026, blocks sensitive data returned by tool calls.
Enigma Vault NoPII takes a different path for agents you build: detection runs on tool-call arguments and tool results inside the same request, and the agent receives real values back.
Detection Accuracy and False Positives
Nightfall advertises 95% detection precision and attributes it to its proof-of-value results. We found no independent benchmark or recall figure. Its G2 reviewers praise the coverage, and several also mention false positives, alert fatigue, and learning regex to exclude certain identifiers.
Enigma Vault NoPII publishes the results of 109 automated tests on its engine and checks checksums where a format allows. It also makes no independent accuracy claim, so test both on your own data.
Deployment and Data Residency
Nightfall runs as SaaS, and its security page names US hosting. We found no on-premises option in its docs. Enigma Vault NoPII runs as NoPII Cloud, and its self-hosted edition runs the proxy and vault in your environment on an Enterprise license.
Audit Trails Compared: Enigma Vault NoPII and Nightfall
Both products leave a record of what they caught. Nightfall’s record is built around alerts that a security team triages, while Enigma Vault NoPII’s is built around proof that a provider never received plaintext.
| Audit question | Enigma VaultNoPII | Nightfall |
|---|---|---|
| What is recorded | Time, session, provider, model, entity type, confidence, token, and a masked value | Findings from scans, with alerts by policy |
| Where it goes | Searchable console log; CSV export from Growth | Alerts to Slack, email, webhooks, or a SIEM |
| Is plaintext stored? | No; the schema has no plaintext field | Reviewers ask for more control over how sensitive content is displayed in alerts |
| How long it is kept | 7 days on Lite, 30 on Starter, 90 on Growth, 365 on Business, unlimited on Enterprise | Not published; ask |
| Erasure requests | Token purge keeps the entry as proof and leaves nothing it can resolve to | Ask how scanned data and findings are retained |
| Next step | Read the first week of Enigma Vault NoPII logs on the free tier. |
If your auditor asks what a model provider received, a token-level log answers it directly. If your security team asks who leaked what and where, Nightfall’s alerting is the better tool for that job.
Secrets and API Keys: Two Places They Leak
Both vendors catch credentials, in different places. Nightfall watches the places people paste them: browsers, endpoints, Slack, GitHub, and, on its Premier edition, coding tools such as Cursor and Claude Code.
Enigma Vault NoPII watches the traffic your applications send. It detects 14 credential families in the same pass as PII, covering cloud provider keys, model API keys, payment and code-platform tokens, database connection strings, private keys, and auth tokens. Each is replaced with a vault token, restored in the response, and logged, and this is on by default for new accounts.
Enigma Vault NoPII in Production Workflows
Here is where Enigma Vault NoPII sits in workflows that are already sending data to model providers, and where Nightfall fits around the same teams.
| Workflow | Enigma VaultNoPII | Nightfall |
|---|---|---|
| Ambient clinical documentation | Patient names and dates of birth tokenized before the transcript reaches the model; the note comes back with real values | Watches clinicians’ use of public AI tools and shared drives |
| Support chat and ticket summaries | Tokenized in the streaming path; erasure handled by token purge | Scans Zendesk and Slack for exposed customer data |
| Financial services copilots | The same account becomes the same token across a fraud narrative, so the reasoning holds | Coaches employees who paste account data into consumer AI |
| HR and recruiting assistants | Names, salaries, and visa details tokenized before the model reads them | Flags resumes and reviews shared in SaaS apps |
| Next step | Enigma Vault NoPII covers the application path; Nightfall covers the people around it. |
Enigma Vault NoPII vs Nightfall 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 |
| Starter, $49/mo ($550/yr) | 50M tokens, then $1.00 per million |
| Growth, $249/mo ($2,700/yr) | 500M tokens, then $0.80 per million; workspaces and Langfuse |
| Business, $499/mo ($5,500/yr) | 2B tokens, then $0.60 per million; SSO and reveal grants |
| Enterprise, custom | SLA, BAA, custom retention, and the self-hosted edition |
Every plan includes every provider, detection, tokenization, restore, and the audit trail. | |
How Nightfall Prices Its Plans
Nightfall AI pricing covers two products priced differently, and only one has a published free tier.
- Developer API: Free for 3 GB of scanned data a month, then custom Enterprise pricing based on the uncompressed volume you scan.
- Business Editions: Foundation and Premier, priced per user per year, with a data discovery add-on sold in storage tiers. The pricing page shows the structure but not the numbers.
- Trial: A free seven-day or limited proof of value instead of a self-serve trial.
Capterra lists a starting price of $4 per feature per month with a free version and free trial, which does not match the per-user model on Nightfall’s own page, so get a written quote.
Enigma Vault NoPII vs Nightfall Cost by Use Case
| Use case | Enigma VaultNoPII | Nightfall |
|---|---|---|
| Testing on real traffic | Free on Lite, 1M protected tokens a month | Free API to 3 GB scanned; proof of value for business editions |
| One production AI feature | $49/mo (Starter) | Developer API, then Enterprise pricing by volume |
| Several AI products and teams | $249 to $499/mo (Growth or Business) | Enterprise API pricing |
| Company-wide employee protection | Not offered | Per user per year, by quote |
| Next step | The units differ: protected tokens, gigabytes scanned, and users. |
The Practical Takeaway: If your team needs to protect an AI feature this week, Enigma Vault NoPII’s free tier covers it with no sales call. If you are buying protection for a few hundred employees, Enigma Vault NoPII cannot help, and Nightfall’s per-user quote is the number to get.
Enigma Vault NoPII vs Nightfall Security and Compliance
Enigma Vault NoPII runs on Enigma Vault’s platform, which is PCI DSS Level 1 and SOC 2 Type II, with a BAA on Enigma Vault NoPII Enterprise. Nightfall states SOC 2 Type 2 on its security page and describes itself as ISO 27001 certified and HIPAA-ready in its FAQ.
| Control | Enigma VaultNoPII | Nightfall |
|---|---|---|
| SOC 2 | Type II (Enigma Vault platform) | Type 2, stated on its security page |
| ISO 27001 | In progress | Stated in its FAQ; certificate not found |
| PCI DSS | Level 1 Service Provider (Card, Data, File Vault in scope) | Control mapping only |
| HIPAA | BAA on Enterprise | “HIPAA-ready”; covers the Security Rule only, per its docs; BAA not found |
| GDPR | Erasure by token purge, with the proof kept in the log | Mapped to GDPR articles |
| Plaintext in logs | Never written | Ask how findings are stored and displayed |
| Next step | Nightfall’s trust center did not load for us; ask for its reports directly. |
Nightfall’s compliance documentation is candid that it supports parts of HIPAA rather than all of it. If you handle PHI, ask both vendors for a signed BAA and the audit reports under NDA.
Enigma Vault NoPII vs Nightfall Reviews on G2 and Capterra
Nightfall has the far deeper review base, with 101 reviews on G2, and that is a real advantage. Enigma Vault NoPII has one.
| Source | Enigma VaultNoPII | Nightfall |
|---|---|---|
| G2 | 5/5 from 1 review | 4.6/5 from 101 reviews |
| Capterra | No listing | 5.0/5 from 2 reviews |
| Most praised | Context kept after tokenization, two-line setup | AI coverage, out-of-the-box policies, Slack alerts |
| Most criticized | The interface | False positives, reporting and filters, alert configuration |
| Next step | Reviews describe different jobs, so weigh the ones closest to your use case. |
Praise and Complaints From Nightfall Users
Reviewers on G2 praise its AI coverage, strong out-of-the-box policies, deep Slack integration and alerting, and newer controls for shadow AI. Several say it performs consistently without ongoing adjustment.
On the critical side, reviewers ask for better reporting and filters, more customizable detectors and alert settings, and more integrations, and some describe false positives that needed policy tuning.
Feedback on Enigma Vault NoPII
The one G2 reviewer values that tokenization keeps context that redaction loses and that setup took two lines of code, and finds the interface clunky. One review is not a sample, so the better evidence is the free tier on your own prompts.
Does Nightfall Compare Itself to Enigma Vault NoPII?
No. Nightfall’s comparison pages are aimed at data loss prevention vendors such as Forcepoint, Code42, Cyberhaven, Netskope, Microsoft Purview, and Zscaler, not at LLM privacy proxies. That tells you how Nightfall sees its market: workforce data protection first. Its FAQ also makes unsourced claims about rivals, so treat any vendor’s comparison, ours included, as a starting point for a proof of concept.
Enigma Vault NoPII or Nightfall: Which Fits Your Role
These two products are usually bought by different people. Start from who owns the risk in your company.
Heads of Product and Engineering
You own the AI features and the customer security reviews that come with them. Your question is what your software sends to OpenAI or Anthropic, and whether the reply still works.
Enigma Vault NoPII answers it with a base-URL change, consistent tokens, and real values restored in every response. Nightfall’s scan API can help, but your code would call it on every payload and handle any reversal itself.
Best fit: Enigma Vault NoPII.
CISOs and Security Teams
Your question is what employees paste into ChatGPT, Claude, and Copilot, and what sits exposed in Slack, Drive, and GitHub. Nightfall answers it with browser plugins, an endpoint agent, SaaS connectors, and in-the-moment coaching, and its 101 G2 reviews praise that coverage. Enigma Vault NoPII does not monitor people at all.
Reviewers also mention false positives and alert tuning, so budget time for policy work after rollout.
Best fit: Nightfall.
Compliance and Privacy Officers
| What you are asked for | Enigma Vault NoPII | Nightfall |
|---|---|---|
| Proof that PHI never reached a model provider | Detection log with tokens and masked values, never plaintext | Findings and alerts for employee activity |
| A signed BAA | On Enterprise | Not found on its pages; HIPAA Security Rule coverage only |
| Erasure on request | Token purge, with the proof kept in the log | Ask how scanned data and findings are retained |
Best fit: Enigma Vault NoPII for AI products; Nightfall for workforce data loss.
Developer Platform Leads
Secrets leak in two places: engineers’ coding assistants and the apps they ship. Nightfall’s Premier edition covers Cursor, Claude Code, and VS Code, while Enigma Vault NoPII catches 14 credential families in your applications’ LLM traffic. Decide which leak your incident history points to.
Best fit: Nightfall for coding-tool leaks; Enigma Vault NoPII for secrets in your product’s LLM traffic.
Questions to Ask Before You Choose Enigma Vault NoPII or Nightfall
| Question | Enigma VaultNoPII | Nightfall |
|---|---|---|
| Which traffic will this protect? | Your apps’ LLM API calls, including tools and embeddings | Ask which channels your edition includes |
| Will responses keep real values? | Yes, restored automatically | Ask how you would reverse a redaction |
| What will it cost at our size? | Published, by protected tokens | Quote, by users or scanned volume |
| Can we try it on real data? | Yes, Lite is free indefinitely | Free API tier; proof of value for business editions |
| Will you sign a BAA? | On Enterprise | Ask directly; not found on its pages |
| 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 Nightfall’s Developer API to Enigma Vault NoPII
If you built your AI feature on Nightfall’s scan API and now need real values back in responses, the change is in where scanning happens.
- Find Every Scan Call: List each place your code calls the scan endpoint before a model call, and any code that decrypts or fills placeholders.
- Keep What Still Fits: If you also use Nightfall for employees or SaaS apps, that work is separate and does not need to move.
- Route One Provider First: Point one model client at the Enigma Vault NoPII base URL and compare what reaches the provider in the audit log.
- Remove the Scan Step: Once results match, drop the scan calls on that path.
If you want help mapping your AI data path, book a migration call, or read our guide on how to use OpenAI without exposing PII.
Final Verdict: Enigma Vault NoPII or Nightfall?
Nightfall is a well-reviewed data loss prevention platform, and if your problem is employees sharing sensitive data with AI tools and SaaS apps, it is the stronger choice. I would tell you that directly.
If your problem is the PII inside the LLM calls your own product makes, Enigma Vault NoPII is built for exactly that: tokens go to the model, real values come back, and the log never holds plaintext. It does not watch employees, browsers, or files, so match the product to the door you need to guard.
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, LLM data leakage, PII protection for LLMs, and the best PII tokenization software for LLMs.
How We Researched This Comparison
We checked every fact on 10 November 2026. Nightfall facts come from nightfall.ai, its pricing, security, and product pages, its help center and Developer API docs, and its press releases. Review data comes from G2 and Capterra, read live, 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 Nightfall 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.
