01
Live interview and meeting context
Capture transcripts, prompts, screenshots, constraints, and follow-up questions while the call is still moving.
Free local-first desktop copilot
Desktop AI interview and meeting copilot.
ExtraBrain is a free, local-first desktop AI interview and meeting copilot. It helps engineers, candidates, students, founders, and meeting leads follow live conversations with transcription, screen-aware context, local Gemma 4 where installed and compatible, BYO AI providers, and privacy controls. Available for Mac today, with Windows and Linux planned.
Local Parakeet transcription Local Gemma 4 when installed and compatible Optional Deepgram OpenAI, Anthropic, Claude, Codex Available for Mac today Windows & Linux planned
Live session
System design interview · live
14:02
ExtraBrain · live transcript Listening · 14:02
14:02:10Host Design a rate limiter for a public API with regional spikes and abusive bursts.
14:02:18You Should limits be per user, per IP, or per endpoint?
14:02:24Host Start with per-user and per-endpoint limits. We care about burst traffic and graceful fallback.
Answer · 2 sources · 0.6s
Start with token buckets at the edge for burst tolerance, then coordinate counters through
Redis or another distributed store. Call out fail-open vs fail-closed.
transcript · 14:02:10 transcript · 14:02:24
Saved facts
Rate limiter · public API
Burst traffic: edge token buckets
Tradeoff: fail-open vs fail-closed
Session memory
Live context
Transcript-aware answers, saved facts, and follow-ups while the call is still active.
Built for high-stakes live thinking. Free, local-first desktop AI interview and meeting copilot. Available for Mac today, with local Gemma 4 on-device AI where installed and compatible and provider access you control.
Engineers PMs Founders Students Research teams
Overview
An invisible AI copilot for interviews, meetings, lectures, and research.
ExtraBrain turns live audio, transcript text, screenshots, and selected context into organized prompts, answer structures, and session memory while keeping local Gemma 4 availability, provider choice, costs, and privacy boundaries visible.
02
Interview answers with structure
Turn coding, system design, and behavioral prompts into clarifying questions, baselines, tradeoffs, and follow-up points.
03
Choose local Gemma 4 or providers you control
Use local Gemma 4 on-device AI where installed and compatible, or connect OpenAI, Anthropic, custom OpenAI-compatible endpoints, Claude Subscription, or Codex Subscription modes.
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Local-first by design
Keep transcripts, prompts, screenshots, and notes on your Mac in a fully local setup, or explicitly send selected content to external providers when you choose them.
How it works
From download to live support in three steps.
Keep the setup path simple: install the Mac app, choose local or cloud transcription, select local Gemma 4 when your hardware supports it or connect provider access, and rehearse once before a real interview, meeting, or lecture.
Start the Mac app
Download the latest release, open ExtraBrain before the interview or meeting, and confirm microphone, transcription, and provider settings.
Follow the live signal
Use transcript-aware prompts for coding interviews, system design rounds, product meetings, lectures, and research calls.
Leave with useful context
Generate summaries, action items, edge cases, unresolved risks, and post-answer feedback before the session context fades.
Use cases
Designed for moments where context moves faster than notes.
Use ExtraBrain as a private thinking layer during high-pressure live work: interviews, meetings, customer calls, lectures, and research conversations.
Summarize the coding prompt, list edge cases, and outline a clean baseline before I start.
Turn these requirements into components, tradeoffs, and follow-up questions.
Extract decisions, risks, owners, and follow-ups from this call.
Highlight customer pain points and quotes I can use in roadmap notes.
Convert this explanation into concepts, examples, and review questions.
Compatibility
Works invisibly across the interview and meeting platforms people actually use.
ExtraBrain is designed to stay hidden from screen sharing and screen recording on major video call tools and coding interview environments, while remaining available on your own Mac. Always follow the rules of the interview, employer, school, meeting, or platform.
Zoom
Google Meet
Microsoft Teams
Cisco Webex
Amazon Chime
Lark / Feishu
Slack Huddles
Discord
HackerRank
CoderPad
Codility
CodeSignal
Built for live coding interviews, LeetCode-style prompts, system design rounds, behavioral interviews, product interviews, data and ML interviews, consulting cases, lectures, and research calls.
Trust and control
Local-first control belongs in the main product story.
ExtraBrain can keep requests on your device when you use local Gemma 4 and local Parakeet transcription. Privacy still depends on your selected setup, including what you send to optional model and transcription providers.
You choose what to capture
ExtraBrain is a desktop app, not a meeting bot joining the room. Keep session scope, prompts, and outputs in your control.
Your model choice stays yours
The app does not force a single hosted AI vendor. Use local Gemma 4 on-device AI where installed and compatible, or connect the provider subscriptions, accounts, or API keys you trust.
Use it within the rules
Interview and workplace policies vary. ExtraBrain should support your thinking, notes, and preparation without misrepresenting your skills.
ExtraBrain should support your thinking, notes, and preparation. You are still responsible for following interview, workplace, and platform policies.Interview policy reminder
Pricing structure
Free to start. Pro from $6.99/month, $79/year, or $149 lifetime.
Free core access, local Gemma 4 on-device AI where installed and compatible, BYO provider subscriptions or API keys, Pro workflow tools, and enterprise support by contact.
Free
Core desktop app, live workflow support, local Gemma 4 on-device AI where installed and compatible, and BYO provider setup.
Always free
- Download and use the Mac app
- Use local Gemma 4 on-device AI where installed and compatible, or connect OpenAI, Anthropic, Claude, Codex, or compatible provider access
- Local-first transcripts, prompts, screenshots, notes, and session context
- Local Parakeet transcription and optional Deepgram setup
- Help center, setup, privacy, and troubleshooting guides
Pro
Advanced controls for repeated interview, meeting, and research workflows. Pick the billing option that fits your timeline.
- Everything in Free
- Custom profiles with reusable prompt guidance
- Profile-specific workflow controls for analysis behavior
- Richer session history across transcripts, notes, screenshots, and saved facts
- Post-session summaries for decisions, risks, follow-ups, and review
- Premium model and advanced workflow controls where enabled
- Purchase and activate from Settings -> License inside the app
Enterprise
Policy, deployment, privacy, and workflow support for teams.
Custom
- Team rollout planning
- Responsible-use and policy guidance
- Security and deployment review
- Custom workflow support for team requirements
Discovery pages
Specific pages for the questions people and AI search systems ask.
ExtraBrain has first-party pages for downloads, privacy, providers, local transcription, use cases, comparisons, release notes, and responsible use.
FAQ
Common questions about ExtraBrain.
Direct answers for searchers comparing invisible AI interview assistants, meeting copilots, local Gemma 4, provider-connected tools, and local-first desktop apps.
What is ExtraBrain?
ExtraBrain is a free, local-first desktop AI interview and meeting copilot. It provides live transcription, screen-aware context, structured prompts, question generation, local Gemma 4 on-device AI where installed and compatible, and a desktop window designed for private live workflows. It is available for Mac today, with Windows and Linux planned.
Is ExtraBrain the same as Extra Brain?
Yes. ExtraBrain is the official product name, and Extra Brain is a common spaced search people may use for the same Mac AI interview assistant and meeting copilot.
Is ExtraBrain free?
Yes. ExtraBrain is free to download and use. ExtraBrain Pro starts at $6.99/month (Founder pricing, regular $9.99), with $79/year, and a $149 Lifetime launch option. Pro adds custom profiles, reusable prompt guidance, richer session history, post-session summaries, premium model controls where enabled, and advanced workflow tools.
What platforms does ExtraBrain support?
ExtraBrain is available for Mac today, including Apple Silicon Macs such as M1, M2, M3, and M4, plus Intel Macs. Windows and Linux are planned, not current release targets.
Which AI providers does ExtraBrain support?
ExtraBrain supports Google Gemma 4 local AI where installed and compatible, plus provider access you control: OpenAI, Anthropic, custom OpenAI-compatible endpoints, Claude Subscription, and Codex Subscription modes.
Can I bring my own OpenAI or Anthropic key?
Yes. ExtraBrain is built around provider access you control. You can use local Gemma 4 where installed and compatible, or connect your own OpenAI, Anthropic, custom OpenAI-compatible endpoint, Claude Subscription, or Codex Subscription setup.
How does transcription work?
ExtraBrain supports local NVIDIA Parakeet transcription and optional Deepgram. Your exact data flow depends on whether you choose local Parakeet transcription, local Gemma 4, or external providers.
Does ExtraBrain collect user data?
ExtraBrain is designed as a local-first app. With local Gemma 4 and local Parakeet transcription, transcription and AI prompts can stay on your Mac. Content may leave your device only when you choose optional external providers such as cloud model APIs or Deepgram.
Is using ExtraBrain in interviews allowed or considered cheating?
ExtraBrain is a tool, and you are responsible for following the policies of the company, interviewer, school, employer, or platform you are working with. Use it to support thinking, notes, accessibility, and preparation without misrepresenting your skills.
Can interviewers detect ExtraBrain on Zoom, Google Meet, or Microsoft Teams?
ExtraBrain is designed to stay hidden from screen sharing and screen recording on major meeting tools. You should still follow all interview, workplace, school, and platform rules.
Does ExtraBrain join the meeting as a bot?
No. ExtraBrain runs as a desktop app on your Mac rather than joining Zoom, Google Meet, Microsoft Teams, or other calls as another participant.
Does ExtraBrain help with LeetCode and coding interviews?
Yes. ExtraBrain is built for coding interviews and LeetCode-style sessions on HackerRank, CoderPad, Codility, CodeSignal, and similar platforms. It can help capture prompts, reason through edge cases, and structure complexity tradeoffs.
Can ExtraBrain help after a meeting or interview?
Yes. ExtraBrain can help turn session context into notes, decisions, action items, unresolved risks, follow-up questions, saved facts, and review material while keeping the workflow in a desktop app you control.
Is ExtraBrain more like an interview assistant or a meeting notetaker?
ExtraBrain sits between those categories. It supports live interview workflows, meeting notes, local transcription, screen-aware context, and post-session review without joining the call as a meeting bot.
Can ExtraBrain run without sending content to the cloud?
A fully local posture is possible when local Parakeet transcription and local Gemma 4 are installed, compatible, and you do not choose external model or transcription providers. Downloads, updates, website analytics, and external providers use network services.
How is ExtraBrain different from InterviewCoder, Cluely, or Final Round AI?
ExtraBrain is local-first, free to start, desktop-native, and built around local Gemma 4 on-device AI where installed and compatible plus provider access you control. It is available for Mac today, with Windows and Linux planned. It emphasizes model choice, data-flow clarity, responsible use, and live interview or meeting context rather than bundled AI credits alone.
Ready when the conversation starts
Download the free Mac app before the call starts.
ExtraBrain gives you a private live workspace for interview prompts, meeting notes, structured answers, and post-session summaries, all in a desktop app you control.