Privacy Policy

Last updated: April 9, 2026

T800 is built around a simple principle: your car’s data is yours. This page explains what we collect, what we don’t, and what we do with it.

If anything here is unclear, email us at [email protected].

Who we are

T800 is operated by Harrison Guo, an independent engineer based in White Rock, British Columbia, Canada. The product is currently in early access. There is no parent company, no investors, and no third-party data partners.

What T800 actually reads from your car

T800 connects to your Tesla through an OBDLink MX+ adapter plugged into the standard OBD-II port. It listens to the vehicle’s CAN bus in passive read-only mode.

That means:

• T800 does not send commands to your vehicle
• T800 does not control charging, driving, locking, or any vehicle function
• T800 does not interfere with vehicle sleep, security, or Sentry Mode
• T800 does not require a Tesla account, API token, or third-party login

The OBDLink MX+ is used in passive listening mode. Your car has no idea T800 is there.

What the T800 Box physically cannot read

Before we get into what stays where, the most important thing to understand is what T800 is not able to collect even if we wanted to:

• GPS coordinates or any location data. The Tesla CAN bus that T800 listens to does not carry GPS. There is no way for T800 to know where your car has been, where you live, or where you’re going.
• Cabin audio, camera feeds, or driver monitoring. These live on a separate bus and we do not touch it.
• Destination, route, departure/arrival patterns. Not in the CAN data we read.
• Tesla account, vehicle owner name, login history. Never requested, never seen.

T800 reads physical vehicle telemetry: voltages, currents, temperatures, pressures, SoC, motor torque/RPM, odometer, charging state. Think “diagnostic log”, not “tracking log”. We don’t need privacy promises for data we cannot physically obtain.

How T800 stores your car’s data

T800 treats your Tesla’s telemetry the way a doctor’s office treats your medical history: the record follows the patient, not the filing cabinet. Here’s what that looks like in practice.

The T800 Box in your garage keeps a rolling ~30-day local buffer. This is a cache, not an archive. It’s there so the box can process data locally, survive brief internet outages, and catch up if the cloud link drops. Older than ~30 days, and the box rolls off the oldest day to make room for the newest. Local storage on a small garage computer is simply not the right place for a multi-year record.

The multi-year record lives in the T800 cloud. Two kinds of data sync up:

1. Aggregated daily digests — the same reports you see in the app. Per-monitor metrics, trend scores, alert events, data-quality flags. These power the dashboard, the streak counter, and the alerts.
2. Compressed raw CAN telemetry (T800 Archive) — the encrypted, day-by-day record of every signal the T800 Box read. This is your vehicle’s permanent health record. It survives device swaps, failures, moves, resales, and future algorithm improvements.

Both are tied to your account, not your hardware. Swap the T800 Box, upgrade, move cities — your history follows you.

Why we feel OK defaulting Archive on

The single most common concern about cloud-stored vehicle data is location tracking. T800 physically cannot collect location data from the source it reads (see the section above). The raw CAN stream we ingest has no GPS coordinates, no destination, no route, no departure/arrival times, no cabin audio, no camera feeds. These signals are not on the bus we read — it’s not a matter of us “choosing not to store them,” it’s that they don’t exist in our pipeline in the first place.

Given that, raw CAN archive and “personal data archive” are not the same thing for this product. What we store is pure physical vehicle telemetry: voltages, currents, temperatures, pressures, SoC, motor state, odometer, charging events. Uploading it does not tell anyone where you went, when, or why. So we default Archive on and we give you the benefit: a real, permanent health record for your car.

What T800 Archive stores

• Compressed raw CAN frames (parquet/zstd), organized by day
• The same signals your local T800 Box reads
• Encrypted in transit and at rest
• Indexed by (your_account, vehicle, date)

What T800 Archive still never stores

Because T800 physically cannot read them:

• GPS, location, destination, or route
• Cabin audio, camera, or driver-monitoring feeds
• Tesla account credentials or app usage
• Personally identifiable vehicle information (we don’t request VIN, plate, or owner name)

What the permanent health record gives you

• Resale value. A verifiable multi-year T800 Sell Report has real market value. “Here are three years of documented daily health reports” beats “Tesla said it’s fine” in every negotiation.
• Retroactive analysis. When we ship a new monitor — say, a better bearing-wear detector or a more sensitive cell-imbalance catcher — we can re-run it across your entire history and tell you if there were early signs you missed months ago. This is only possible if the raw data is still around.
• Future-proof data asset. Our CAN parsing improves every month. Signals we can’t fully decode today will give us new insights next year. Raw data archived now compounds in value over time.
• Device-independent access. View your full history from phone, web, a friend’s laptop — nothing is locked to a single piece of hardware in your garage.
• Survives hardware. Swap the T800 Box, lose one, or upgrade to a future model — the record comes with you.

Strict Local Mode (opt-out, anytime)

If you prefer to keep the raw archive out of the cloud, turn on Strict Local Mode in your account. We will:

1. Stop uploading new raw CAN data to the cloud immediately.
2. Continue sending aggregated daily digests so the app still works (you can turn this off too, but then the app goes dark).
3. Delete any previously-uploaded raw archive within 30 days of the request. (Aggregated digests older than what Strict Local needs are also removed on request.)

What you lose when you turn Strict Local on:

• Your raw data history is capped to the ~30-day rolling buffer on the T800 Box. Anything older than that is rolled off — not by us, by the physical limits of local storage.
• T800 Sell Report stops working for the periods covered by Strict Local. The sell report is a summary of the raw archive; if we don’t have the archive, we can’t build the report.
• Retroactive analysis stops working. When a new monitor ships a year from now, we have no old data to re-scan.
• Cross-device access beyond the local buffer stops working. You’ll only see the last ~30 days from any device.

This is a real trade-off, and it is yours to make. We spell it out in detail so you can choose with eyes open. There is no price difference either way — Archive and Strict Local are both included in the standard T800 subscription.

What we use the data for

We use your aggregated data only to:

1. Show you your own dashboard, daily report, and alerts
2. Operate the T800 service (uptime monitoring, debugging your device if you ask for help)
3. Improve detection algorithms — but only after anonymizing and aggregating across the fleet

We never use your data to:

• Sell or share with third parties
• Build advertising profiles
• Train external machine learning models
• Provide to insurance companies, Tesla, or anyone else without your explicit consent

Your account information

If you join the waitlist or create an account, we collect:

• Email address (required to send you reports and alerts)
• Vehicle year/model (to calibrate monitors correctly)
• Optional: country/region, garage Wi-Fi setup notes for support

That’s it. We do not ask for full name, address, phone number, VIN, or license plate. If you want to give us your shipping address later (when we ship your T800 Box), that’s a separate transaction handled through Stripe.

Where data is stored

• Local processing: Your T800 Box (under your physical control)
• Cloud aggregates: Servers in Canada (currently OVH Beauharnois data center, Quebec)
• Payment information: Handled entirely by Stripe — we never see or store your card number
• Backups: Daily encrypted snapshots, retained for 30 days

We do not transfer your data to the United States, EU, or Asia.

How long we keep data

When you delete your account, your personal data is removed within 30 days. The aggregated, anonymous fleet data (which has no link back to you) stays.

Your rights

You can, at any time:

• Request a copy of your data ([email protected])
• Delete your account and all associated data
• Opt out of any future product communication
• Take your T800 Box home and unplug it (we cannot collect what you don’t send)

If you’re in the EU/UK, you have GDPR rights. If you’re in California, you have CCPA rights. We honor both, even though we’re a small Canadian operation.

Children

T800 is not intended for anyone under 18. We do not knowingly collect data from minors.

Cookies and analytics

The t800.io website uses minimal cookies:

• A session cookie for the waitlist form (so we know if you’ve already signed up)
• No third-party analytics (no Google Analytics, no Facebook Pixel, no advertising tags)

We may add Plausible or a similar privacy-respecting analytics tool later. If we do, we’ll update this page.

Changes to this policy

If we change anything material, we’ll email you before the change takes effect. Minor wording changes get noted at the top of this page.

Contact

[email protected] — for any privacy question or data request.

[email protected] — for general questions about T800.