Historian Explorer
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Bravura-AI Historian Explorer

Windows desktop app · DeltaV Continuous Historian

Open, explore, and export DeltaV historian data, right on your desktop.

Bravura-AI Historian Explorer opens DeltaV Continuous Historian .xfc archive files directly. No historian server, no database, no cloud. Point it at a folder of exports and instantly browse every tag, inspect metadata, chart trends, and export to CSV, Excel, or SQLite. Browsing and export run offline.

Download free demo See pricing

Windows 10 / 11 (64-bit) · Works offline · Air-gapped licenses available

Per-tag metadata and interactive trend charts in Bravura-AI Historian Explorer

Built for control-systems engineers

Everything you need to get DeltaV historian data off the plant floor and into your analysis, without standing up any infrastructure.

No server, no setup

Point at your .xfc export folder and go. No historian server, database, or cloud account required.

Reads native .xfc

Opens DeltaV Continuous Historian archive files directly: the exact files your plant already produces.

Offline and air-gapped ready

Browsing, charting and export run entirely on the workstation. Standard licenses check in online at least every 7 days; for locked-down plant networks, every one-time tier is available as an air-gapped license.

Fast on big data

Browses and charts millions of samples in seconds. Sub-second tag search across many files.

Export anywhere

Raw export to CSV (long or wide) and Excel (per-tag or all-in-one) on every paid tier, plus a raw SQLite database on Pro, Site and subscriptions.

Metadata at a glance

Per-file view (tags, sample counts, time spans) and per-tag view (which files contain it, ranges, min/max/mean).

Advanced Export Pro, Site, subscriptions

Resample on the way out (linear, step/LOCF, nearest, time-weighted average, min/max/count, auto) with boundary fill, quality filtering, and despike / deadband / swinging-door noise filters. Included with Pro, Site and every subscription; not part of Lite or the Free demo.

Interactive chart with overview brush

Zoom into a window, navigate via the overview brush below, see live stats (count, min, max, mean, span) for the visible range.

Display time zone

Pick any time zone (Local, UTC, or any IANA zone) from a searchable header picker; chart axes and metadata times re-render in your choice, and the choice persists.

Chat with your historian data in plain English New

Ask Historian sits next to Tags and Files. Ask in plain English; answers cite the source file. Use the Bravura-AI hosted option, your own key (BYOK) with seven cloud providers, or a local model through Ollama that needs no internet connection. The note under each answer shows exactly what was sent.

Look at the data the way you want

Interactive chart with an overview brush and a live summary, plus a display time zone you choose once and the app remembers.

Interactive chart with overview brush

Drag-select on the chart (or use the mouse wheel) to zoom the X axis. Double-click the chart, or press Reset zoom, to restore the full range. A small overview chart below the main view shows the whole series with the current window highlighted: drag the highlight to pan, drag its edges to resize, or drag empty area to draw a new window. A summary strip between the two charts reports the visible window's point count, min, max, mean, and time span, updating live as you zoom or brush.

Zoom, overview brush and visible-range summary
Zoom into a window, navigate via the overview brush, see live stats for the visible range.

Display time zone

XFC data is stored in UTC. A searchable picker in the header lets you display in Local, UTC, or any IANA time zone. Chart axis labels and every metadata time re-render in the chosen zone, and the choice persists across launches per workstation.

Time zone picker in the header
Searchable picker in the header (Local, UTC, or any IANA zone).
Chart re-rendered in the chosen time zone
Same data, re-rendered in your chosen time zone.

New

Chat with your historian data in plain English

Ask Historian sits next to Tags and Files. Ask questions like "which tags drifted the most last week?" or "summarize 2-FIC-2001 around the last shutdown". Every answer cites the source file the numbers came from.

Streamed answer with a tool-call card and a citation back to the source file
A streamed answer with a tool-call card and a citation back to the source file.

A chat tab next to Tags and Files

A right-side chat dock follows you across the app. The Tag and File detail views have Ask about this tag and Ask about this file buttons that pre-seed the chat with context. Every assistant reply carries a per-turn privacy footer that spells out exactly what left your machine.

Pick your AI provider

BYOK across seven cloud providers: Anthropic, OpenAI, Gemini, xAI, DeepSeek, Mistral, OpenRouter. Or the Bravura-AI hosted option (Claude Haiku 4.5), which works right after install with no API key setup. The hosted option and cloud providers need an internet connection. Or run a local model through Ollama on the workstation: Ask Historian then works with no internet connection. Keys typed into the app are encrypted at rest using Windows, sent only on the request that uses them, and never sit on a Bravura-AI server.

Three privacy modes

BYOK

Your key, your bill

Connects directly to the provider you chose. Bravura-AI never sees the traffic or the bill.

Hosted

Bravura-AI's key, one invoice

Backed by Anthropic Claude Haiku 4.5. Billed through Bravura-AI with hosted-message bundles per tier.

Local

Ollama on the workstation

Runs a local model through Ollama with the same in-app chat experience. No internet connection needed, and the chat traffic stays on the workstation.

Air-gapped licenses keep Ask Historian on local models. On an air-gapped Pro or Site license, Ask Historian works with local models only: the license itself refuses the hosted option and cloud providers, not just the UI. Lite has no Ask Historian in either variant. The Site Air-Gap Bundle, which adds a packaged local model, is planned.

Privacy: you see exactly what was sent

  • Answering a question may send tag names, time ranges, summary statistics and, when the analysis needs them, sample points to the provider you selected. The note under each answer shows exactly what was sent, and the session audit log keeps it.
  • With a local model through Ollama on the workstation, the chat traffic does not leave the machine.
  • Every chat session writes a structured audit log (timestamp, model, provider, tool calls, payloads sent and received). Export the whole session as a ZIP from the License panel; this is the artifact pharma and GxP customers hand to QA.
  • Telemetry is opt-in and off by default. When enabled, only anonymized tool name plus latency plus token-bucket metrics ship. Arguments and values never leave the machine.
Ask tab entry point in the main app
Open the Ask tab to chat with your loaded historian data.
AI provider settings tab in the License panel
AI provider settings: provider, model, key (write-only), and telemetry consent.

Pricing: external clients via a bundled MCP server

A bundled MCP server lets Claude Desktop, Cursor, Cline, and other MCP clients connect to your loaded .xfc data and use the same tools the in-app Ask uses. It connects over stdio (standard input / output, the local connection type MCP clients use). Per-client tokens are minted from the License panel.

  • Included on Pro, Site, and every subscription.
  • Not included in the Free demo or Lite.

See the pricing tables

Three steps from archive to analysis

  1. 1

    Point to your .xfc folder

    Select the folder of DeltaV Continuous Historian exports. No import, no ingest job. It reads them in place.

  2. 2

    Browse, search, chart

    Search every tag, filter by area / type / category, inspect metadata, and chart trends with on-the-fly resampling.

  3. 3

    Export to CSV / Excel / SQLite

    One click to export the tags and ranges you need, in the format your downstream tools expect.

Export that drops straight into your tools

Browsing is always free. When you're ready to take the data with you, export the exact tags and ranges you need.

  • SQLite database (Pro, Site and subscriptions): a clean Source / Tag / Sample schema you can query directly or load into analytics and BI tools. Export it raw (HIST-faithful) or as a derived resampled database.
  • CSV: long or wide layout, for scripts, spreadsheets, and quick checks.
  • Excel: one sheet per tag, or everything in a single workbook.

Raw CSV and Excel export is included on every paid tier (Lite exports CSV and Excel only). Resampling and filtering are part of Advanced Export, included with Pro, Site and every subscription.

Export a clean SQLite (Source / Tag / Sample) database

Pricing

Browsing is always free. Quotas count the distinct files and tags you unlock for export.

One-time (perpetual) licenses

TierQuota (files / tags)Ask HistorianHosted message bucketAdvanced ExportExternal MCPPriceAction
Free demo 1 file / 10 tags, CSV only (15-min sessions) Hosted only, no BYOK 2 lifetime No No $0 Download the free demo
Lite 50 files / 2,000 tags, CSV and Excel Not included None No No $249 Request a quote
Pro 500 files / 50,000 tags Included 500 / month while maintenance is active, plus 200 lifetime Included Included $799Year-1 maintenance included; renewal $160 / yr Request a quote
Site Unlimited, multi-seat (seats by quote) Included 2,000 / seat / month while maintenance is active, plus 750 lifetime Included Included Request a quoteYear-1 maintenance included Request a quote
Site Air-Gap Bundle planned Unlimited, multi-seat (seats by quote) Bundled local model only None (offline) Included Included (local clients) Request a quoteYear-1 maintenance included: support and updates Request a quote

Maintenance (Pro and Site) covers technical support and updates to new versions. On online licenses it also includes the monthly hosted bucket; air-gapped licenses get support and updates only. The first year is included in the price. From the first anniversary you can renew it: $160 / year for Pro, by quote for Site. Renewal needs your explicit consent and never starts automatically. If maintenance lapses on an online license, the monthly bucket ends; your lifetime messages and any purchased packs remain.

Perpetual means the license does not expire: you keep using every version released while its maintenance is active. If you install a build released after your maintenance ended, the app tells you and offers the way back: the last covered installer, or a maintenance renewal.

Air-gapped option. Every one-time tier (Lite, Pro, Site) is also available as an air-gapped license for PCs that never connect to the internet. Activation is a file exchange: the offline PC creates a license request file, you turn it into a signed license file on any connected computer, and import it on the offline PC. Air-gapped licenses have no hosted Ask Historian and no cloud providers: on Pro and Site, Ask Historian runs on local models only, and maintenance covers support and updates without hosted messages. Subscriptions are verified online only.

Ask Historian per tier. The Free demo is limited to 2 hosted messages lifetime and does not allow BYOK. On online licenses of every paid tier that includes Ask Historian, the Bravura-AI hosted option (Claude Haiku 4.5) works right after install with no API key setup, and you can also bring your own key (BYOK) for a cloud provider; both need an internet connection. Local models through Ollama work on every license that includes Ask Historian, online or air-gapped. Lite does not include Ask Historian.

Hosted message buckets (online licenses only). Monthly buckets renew each calendar month on the day of your purchase date (for example, on the 15th). Lifetime messages do not renew and do not expire.

Subscriptions

Quotas renew every month. All updates, Advanced Export and External MCP are included. Subscriptions are verified online.

PlanQuota (files / tags)Ask HistorianHosted message bucketAdvanced ExportExternal MCPPriceAction
Pro Monthly 200 files / 20,000 tags per month Included 200 / month Included Included $45 / mo Request a quote
Pro Annual 200 files / 20,000 tags per month Included 500 / month Included Included $449 / yr Request a quote
Team Annual (5 seats) 1,000 files / 100,000 tags per month, pooled Included 1,500 / month, pooled Included Included $1,490 / yrFixed 5-seat pack Request a quote
Site Annual Unlimited, multi-seat (seats by quote) Included Pooled, set in your quote Included Included Request a quote Request a quote

Top-up packs

One-time packs that raise an existing license's quota. Purchased packs do not expire and survive subscription renewals.

PackAddsAvailable forPriceAction
Files +100 files Lite, Pro, Pro and Team subscriptions $99 Request a quote
Tags +10,000 tags Lite, Pro, Pro and Team subscriptions $99 Request a quote
Combo +50 files, +5,000 tags Lite, Pro, Pro and Team subscriptions $129 Request a quote
Hosted messages +500 hosted messages Pro, Pro and Team subscriptions (online licenses) To be confirmed Coming soon

Licensing built for plant PCs

One-time (perpetual) or subscription, node-locked to a machine. Standard licenses are activated and verified online: the app checks in with the license server regularly and keeps working for up to 7 days between check-ins. For plant PCs that can never go online, every one-time tier (Lite, Pro, Site) is also available as an air-gapped license: the offline PC creates a license request file, you exchange it for a signed license file on any connected computer, and import that file on the offline PC. Air-gapped licenses do not include hosted Ask Historian. Quotas can be topped up at any time.

The License panel hosts two surfaces worth knowing about. The AI provider tab next to Activate and Top-up credits holds the provider and model picker, write-only BYOK key fields (the UI shows configured or not configured, never the key itself), a hosted-usage indicator, and the telemetry consent toggle. The Remove license button (visible only when a tier other than Free is active) deactivates the license in one click and reverts the workstation to Free, for moving a seat to another machine.

Ask Historian without internet. On every license that includes Ask Historian (Pro, Site and subscriptions), Ask Historian also works with a local model through Ollama, with no internet connection; the Bravura-AI hosted option and cloud providers need one. Air-gapped licenses use local models only. A packaged local-model bundle (the Site Air-Gap Bundle) is planned.

Swipe or scroll sideways to see the whole panel, or open the full-size image below.

License panel: tier, quota and machine ID, the Activate license, Top-up credits and AI provider tabs, and the Remove license button
The License panel: activate a license, top up credits, pick an AI provider, or remove the license from this machine. Open the full-size image

Frequently asked questions

Do I need a historian server or database?

No. It reads your .xfc export files directly. There is nothing to install on the server side.

Does it work offline or on air-gapped PCs?

Browsing, search, charting and export run locally and work without an internet connection. Standard licenses are verified online and need a connection at least once every 7 days. For fully offline use, choose an air-gapped license, available for every one-time tier (Lite, Pro, Site): the offline PC creates a license request file, you exchange it for a signed license file on any connected computer, and import that file offline. Subscriptions are verified online only. Ask Historian needs an internet connection for the Bravura-AI hosted option and for cloud providers (BYOK); local models through Ollama run without one.

What can I export?

CSV and Excel on every paid tier, plus a SQLite database with a clean Source / Tag / Sample schema on Pro, Site and subscriptions. The Free demo exports CSV.

What OS does it run on?

Windows 10 and Windows 11 (64-bit).

How is it licensed?

Per machine, as a one-time (perpetual) license or a subscription. One-time tiers are also available as air-gapped licenses. Quotas can be topped up at any time.

What is maintenance and do I need it?

Maintenance applies to one-time Pro and Site licenses and covers technical support and updates to new versions. On online licenses it also includes a monthly hosted message bucket (Pro: 500 per month; Site: 2,000 per seat per month); air-gapped licenses get support and updates only, with no hosted messages. The first year is included in the price. From the first anniversary you can renew it ($160 / year for Pro, by quote for Site); renewal needs your explicit consent. Without maintenance your license keeps working on the versions released while maintenance was active. On online licenses your lifetime hosted messages (200 on Pro, 750 on Site) and any purchased packs remain; only the monthly bucket stops.

Will my perpetual license still work in future versions?

A perpetual license never expires and covers every version released while its maintenance is active. If you install a build released after your maintenance ended, the app tells you and offers the way back: the last covered installer, or a maintenance renewal that covers the latest build. Subscriptions and the Free demo do not carry a version cap.

What happens after my hosted message bucket runs out?

Hosted message buckets apply to online licenses only. Hosted messages are spent from the monthly bucket first, then from your lifetime messages, then from purchased packs. Monthly buckets (online Pro and Site with active maintenance, and subscriptions) refill each calendar month on the day of your purchase date. Hosted message packs are coming soon; on every online license that includes Ask Historian you can also switch to your own API key (BYOK) or to a local model through Ollama at any time. The Free demo stops after 2 messages and has no top-ups.

How big a dataset can it handle?

Millions of samples across many files, with sub-second browsing on a modern Windows machine.

What is "Advanced Export"?

Resampling and filtering applied as you export: linear, step (LOCF), nearest, time-weighted, and min/max/count modes, boundary fill, quality filtering, and despike / deadband / swinging-door noise filters. It is included with Pro, Site and every subscription; Lite and the Free demo export raw data only.

Can I export without Advanced Export?

Yes. Raw export to CSV and Excel (one sheet per tag) is available on every paid tier, and Pro, Site and subscriptions add a raw SQLite database. Only the resampling and filter controls are part of Advanced Export.

How do I choose the .xfc folder?

Use the built-in folder picker: click Browse... and select the folder of exports. The app reads them in place.

Can I zoom into a section of the chart?

Yes. Drag-select on the chart (or mouse-wheel) to zoom; use the overview brush below to pan and resize the window. Double-click or Reset zoom restores the full range. The summary strip always reports min / max / mean / count for the visible window.

Which time zone are the timestamps shown in?

Your choice. The app stores timestamps in UTC but lets you pick the display zone (Local, UTC, or any IANA zone via a searchable picker in the header). Chart axes and metadata times re-render in the chosen zone, and your choice is remembered.

Do you store my Anthropic / OpenAI key?

No. API keys typed into the app are encrypted at rest by Windows and sent only on the request that uses them. They are never written to disk in plaintext and never sit on a Bravura-AI server.

What does Ask Historian send to the AI provider?

Answering a question may send tag names, time ranges, summary statistics and, when the analysis needs them, sample points to the provider you selected. The note under each answer shows exactly what was sent, and the session audit log keeps it. How many sample points are sent depends on the question. You can export the audit log of every session as a ZIP.

Download the free demo

Leave your details and the download unlocks right here. The demo opens 1 file / 10 tags in 15-minute sessions; browsing is unlimited.

  • Windows 10 / 11 (64-bit) · ~104 MB installer
  • Browse and export run offline once installed
  • No credit card needed
  • Try Ask Historian: two hosted messages per install, no API key needed (the hosted demo needs an internet connection).
  • Latest build: v0.4.0, released September 3, 2026.

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Configure your license below and send it to our sales team, or just leave us a message. We reply with a written quote you can forward to your purchasing team.

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License type
What's included
Advanced Export
Ask Historian
External MCP
Top-up packs (one-time)
Hosted messages
Estimated total $249

Informational estimate for your quote request; sales confirms the final price.