Your voice, typed everywhere
BrainJack turns your phone into a voice-powered AI keyboard for any computer. Not dictation — full content generation, keystroke injection, and multi-machine control from your pocket.
Voice in, keystrokes out
Speak into your phone. Text appears on your computer — typed into whatever app has focus, as if someone were at the keyboard.
Real keystrokes
BrainJack types into the active window using native OS APIs — Windows SendInput, macOS CGEvents, Linux xdotool/ydotool. Not a paste. Real key-by-key input.
Clipboard mode
Don't have the service installed? The app works standalone — speak, AI generates, text copies to your phone's clipboard. Paste or share from there.
Private by default
On-device speech recognition. Your audio stays on your local network. No cloud relay, no third-party processing. Runs offline with a local ASR model.
Every OS
One service, one install command. Windows, macOS, Linux. Your phone connects over WiFi via WebSocket — fast, direct, no account needed.
Agent mode — not dictation
Dictation apps type what you say. BrainJack understands what you mean and writes what you need.
Full content generation
"Write a professional email declining this meeting." BrainJack writes the whole email. Review it on your phone, edit if needed, send to your computer with one tap.
Knowledge base
Teach it about you — your writing style, your job, your context. RAG-powered personalization means better output the more you use it.
Conversational context
"I'm at the vet." ... "Write a letter confirming Buddy's rabies shot on March 15th." BrainJack carries context across prompts within a session.
Review before sending
Nothing reaches your computer until you approve it. See the output, edit it, then tap to inject. You stay in control.
"Having an AI that can generate a full email from a sentence, review it on my phone, then type it into Outlook on my work PC — that's the workflow nobody else offers."
USB dongle — zero install on target
A small USB device that plugs into any computer and appears as a standard keyboard. No software, no drivers, no admin rights.
Works with anything
If it has a USB port, it works. BIOS screens, login prompts, legacy systems, air-gapped machines, hospital terminals, industrial equipment. The target sees a keyboard — nothing more.
Corporate AI bypass
Your company blocked ChatGPT and Copilot? The AI lives on your phone. The dongle is a standard USB keyboard to the work PC. No software to flag, no network traffic to detect.
How it works
Plug the dongle into the target machine. Open BrainJack on your phone. The phone connects to the dongle over Bluetooth. Speak, and the dongle types. The target machine never knows AI is involved.
One phone, every machine
Manage multiple computers from a single app. Switch between them instantly.
Device profiles
Each machine remembers its OS, macros, and auth token. Switch with one tap. BrainJack adapts keystrokes to the target platform automatically.
SSH terminal
Full terminal access from your phone. Run commands, manage servers, check logs. Landscape mode for real work.
Audio return
Your computer can speak back to your phone. Build alerts, deploy notifications, agent responses — anything that can HTTP POST can push audio to your pocket.
Command sheets
One-tap macro palettes for vim, tmux, emacs, VS Code, shell. Send complex key combos without remembering them. Color-coded and OS-aware.
Bring your own everything
BrainJack doesn't lock you into a cloud. Point it at your own infrastructure and keep full control.
Your ASR
Apple on-device, Whisper, Qwen — or any speech model on your own hardware. Your audio, your model.
Your LLM
Any OpenAI-compatible API. OpenAI, Anthropic, Ollama, vLLM, LM Studio. Or use our budget fallback.
Your network
Everything local. Phone to computer over WiFi. No cloud, no accounts, no tracking. HIPAA-friendly by design.
Source-available
BrainJack Service is source-available under BSL 1.1, converting to Apache 2.0 in 2030. Read the code, audit it, modify it. Free for personal use. View on GitHub
What nothing else does
Other tools handle parts of this. BrainJack is the only one that combines voice input, AI generation, keystroke injection, and hardware — from your phone.
| Capability | BrainJack | Wispr Flow | Superwhisper | Termius / Blink | Apple Dictation |
|---|---|---|---|---|---|
| Voice to text | Yes | Yes | Yes | No | Yes |
| AI content generation | Yes | No | No | No | No |
| Keystroke injection | Yes | No | No | No | No |
| Phone as remote | Yes | No | No | Yes | No |
| USB dongle (zero-install) | Yes | No | No | No | No |
| Multi-device from one app | Yes | No | No | Yes | No |
| Works on BIOS / login screen | Dongle | No | No | No | No |
| BYOK (own AI keys) | Yes | No | No | N/A | No |
| Knowledge base / RAG | Yes | No | No | No | No |
| Cross-platform (Win/Mac/Linux) | Yes | Yes | Mac only | Yes | Apple only |
| Runs fully local | Yes | No | Yes | Partial | Partial |
| Source-available | BSL 1.1 | No | No | Blink only | No |
| Pricing | Free beta | $144/yr | $102/yr | $120/yr | Free |
Try it today
Install the service. Get the app. Start talking.