A Rust-native desktop overlay that renders above your screen yet stays 100% invisible to Zoom, Teams, and Meet. Real-time architecture validation, code-logic checks, and interview answers — visible only to you, retained by no one.
No card required · Private beta · Zero data retention
Engineered for the people who can't afford to glitch
System design reviews, architecture defenses, technical interviews, client deep-dives. No second draft, no autocomplete, no time to look it up. BlankNode gives you a second brain that no one else in the room can see.
Recall degrades exactly when the stakes are highest. BlankNode keeps the full context in front of you.
Screen-shared, recorded, scrutinized. Anything visible is evidence — so BlankNode is visible to no capture pipeline.
One wrong latency number or missed edge case reframes the whole session. Validate in real time before you say it out loud.
Three layers, all on your machine, none of them on the wire your meeting sees.
BlankNode paints a transparent NSPanel above every app — including fullscreen — using a compositor layer that screen-capture APIs never sample. Zoom, Teams, and Meet record your screen exactly as if BlankNode weren't there.
It reads what you choose to feed it — a screenshot (⌘⇧C) or continuous listening (⌘⇧R) — and returns architecture validation, logic checks, and interview-ready answers in a scrollable pane.
Audio and captures are processed in-memory and discarded. Nothing is written to disk, nothing is stored server-side. Toggle full invisibility with ⌘⇧I.
Not a hidden window — a compositor-level overlay that never enters the screen-capture pipeline. Verified invisible across Zoom, Google Meet, Microsoft Teams, QuickTime, and OS-native recorders. What they capture is your screen, untouched.
A native binary with a sub-16ms overlay paint. No Electron tax, no browser jank — it keeps pace with the conversation.
Routes each problem — algorithm, system design, debugging, explanation — to the right model, primed with your prep brief. Answers, not raw transcripts.
Detects real questions in the room and surfaces answers automatically, filtering silence and noise. Nothing shows on the shared screen.
In-memory processing, nothing persisted to disk, no server-side storage of your sessions. Privacy isn't a setting — it's the architecture.
Grab the whole screen or a region and get an instant read on the architecture, diagram, or code in front of you.
A .dmg for Apple Silicon (macOS 14+), an installer for Windows 10/11 and AppImage/.deb for Linux. Updates install themselves; on macOS, first-run prompts handle mic, screen and accessibility.
If it can record your screen, BlankNode stays out of the frame. Verified against the tools your sessions actually run on.
Continuously tested across releases. If a platform can capture it, we treat that as a P0.
| Capability | BlankNode | Screen-visible AI tools |
|---|---|---|
| Invisible to screen recording & sharing | OS-level, verified | Renders in the captured frame |
| Rendering method | Compositor overlay outside capture path | Browser tab / standard window |
| Latency | Rust-native, sub-16ms paint | Electron / web, noticeable lag |
| Data retention | Zero — in-memory, nothing on disk | Cloud history, stored transcripts |
| Works over fullscreen apps | NSPanel above fullscreen | Loses focus / hidden |
| Real-time architecture & logic context | Purpose-built for senior sessions | Generic Q&A |
| Continuous listening with silent output | Auto question detection | Manual / visible |
| Native install (macOS, Windows, Linux) | .dmg / .exe / AppImage | Browser extension |
Comparison reflects the generic screen-capture-visible category. No specific vendor implied.
Recorded off a live Zoom call — BlankNode is on screen, and the recording never saw it.
Validate a trade-off or latency budget the instant it's questioned.
Question detected in the room → answer in your pane, never on their screen.
Field a curveball with the full context of the system in front of you.
One credit is one answered high-stakes moment. Start free — upgrade when the room gets bigger.
Trial · monthly
Start free$490 billed yearly
100 credits / mo
Choose Starter$890 billed yearly
500 credits / mo
Choose Pro$2900 billed yearly
Unlimited credits
Choose UnlimitedAll plans include every platform and zero data retention. Cancel anytime.
macOS
macOS 14 Sonoma+ · Apple Silicon
Invisible in shares · mic + system audio
Windows · beta
Windows 10 (2004+) / 11 · 64-bit
Invisible in shares · mic
Linux · beta
Ubuntu 24.04+, Debian 13+, Fedora 40+ · x86_64
Share a window, not the screen · mic
BlankNode was built privacy-first for people bound by NDAs and enterprise policy.
Captures and audio are processed and discarded — never written to disk.
We don't retain your transcripts, screenshots, or answers server-side.
The stealth and capture layer runs natively on your machine, not in a browser.
Auth tokens stay local; you control what each session is fed.
Yes. BlankNode renders as a compositor-level overlay that sits outside the screen-capture pipeline, so tools like Zoom, Teams, Meet, and native recorders capture your screen exactly as if it weren't running. We test this across platform releases and treat any capture leak as a P0 bug.
Most “copilots” are browser tabs or standard windows — anything the OS can render, the OS can capture. BlankNode uses a native NSPanel overlay above the OS layer (including over fullscreen apps) that capture APIs never sample.
They're processed in-memory and discarded. Nothing is written to disk and we don't store your sessions server-side. Zero data retention is the default, not a toggle.
In a live session, lag is the tell. BlankNode is a native Rust binary with a sub-16ms overlay paint — no Electron or browser overhead — so it keeps pace with the conversation.
macOS 14 Sonoma or later on Apple Silicon; Windows 10 (version 2004) or 11, 64-bit (beta); and Linux x86_64 — Ubuntu 24.04+, Debian 13+, Fedora 40+ (beta, AppImage or .deb). On macOS it's verified invisible across Zoom, Google Meet, Microsoft Teams, Webex, QuickTime, OBS and native recorders; Windows uses the OS capture-exclusion flag. On Linux the overlay is visible if you share your entire screen: share a window or tab instead (other windows never appear in it), or keep BlankNode on a screen you aren't sharing; a hidden mode for KDE Plasma 6.6+ is in testing. Hearing the other side of a call (system audio) is macOS-only for now; Windows and Linux listen through the microphone.
One credit is one answered high-stakes moment — a screenshot solved or a detected question answered. Free is a monthly trial of each feature — 1 screenshot solve, 3 interview answers and 3 minutes of listening; Starter includes 100 credits, Pro 500, and Unlimited removes the cap.
Senior software engineers, solutions architects, and technical consultants who operate in reviewed, recorded, high-stakes sessions and can't afford to glitch.
No. On macOS, first run requests microphone, screen and accessibility permissions with guided prompts — no trip to System Settings. Windows and Linux ask for the microphone the first time you listen.
Join the private beta. Free to start, zero data retained, invisible by design.
No card required · macOS & Windows · Backed by Fabula Labs