What makes Greenroom different from other AI mock interview tools?

Greenroom reads your actual GitHub repos before the session and asks questions specifically about your projects — your architecture decisions, your trade-offs, the libraries you chose. It is not a generic question bank. Every session is unique to your code and impossible to game with memorised answers.

Is Greenroom really free?

Yes. The free plan includes one full voice mock interview per month, AI feedback after every session, and a 14-day study plan. No credit card required. Pro ($10/mo) and Premium ($20/mo) unlock more sessions, history, and progress tracking.

Why would I pay if the free plan already gives a full session?

If one mock a month is enough for you, stay free forever — there's no catch. Pro and Premium exist for the week before an actual interview, when one session a month isn't enough reps. Paid plans give you 10-30 sessions, so you can drill the same weak spot repeatedly in days instead of pacing it out over a month, plus session history and weak-topic tracking so you know exactly what to fix before you go in.

How does the voice AI interviewer work?

You speak; Ari (our AI) listens, responds, and asks follow-up questions in real time — like a senior engineer across the table. The conversation is built from your GitHub repos, your target role, and your interview timeline. After the session you get specific written feedback on what you showed clearly, what was thin, and how you came across under pressure.

What companies do candidates prep for on Greenroom?

Greenroom is built for software engineering roles at modern, fast-moving tech companies — the kind where interviewers dig into your real architecture decisions and trade-offs rather than asking generic textbook questions. If you're prepping for a company like Stripe, Vercel, Linear, Notion, Figma, Shopify, Atlassian, GitHub, Cloudflare, PlanetScale, Supabase, or Railway, Ari's questions are pulled from your own repos, so the practice mirrors the kind of technical depth those interviews go into.

Do I need to connect GitHub to use Greenroom?

GitHub connection is what makes Greenroom personalised, so we strongly recommend it. You can also use Greenroom without GitHub for generic technical practice, but you'll miss the project-specific questions that make sessions feel like real interviews.

AI Mock Interview Practice — Voice Interviews from Your GitHub

From sign-in to scored feedback

A quick walkthrough of the whole flow — your tailored dashboard, a real spoken mock interview, and the feedback you get seconds after.

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Personalised

Questions built from your actual work

Ari reads your repos before the session starts. If you built a Redis-backed job queue, expect a question about your delivery strategy — not "explain Redis." Every session is unique to you and impossible to game with memorized answers.

// Your repo: redis-job-queue
+ "Why did you choose at-least-once delivery
   over exactly-once? Walk me through the trade-offs."
// Not the generic version:
– "Explain the difference between Redis and Memcached."

Voice-first

A real conversation, not a form

Real interviews are conversations. Ari listens, responds, and pushes back — like a senior engineer across the table. Typing answers into a box doesn't build the muscle that matters on the day.

Ari is listening

Ari: "Walk me through how you handle backpressure in your queue."

You: "So when the queue fills up, we..."

Honest feedback

Specific. Not a score.

Three sentences: what you showed, what was thin, how you came across. Nothing vague. No "great job." No arbitrary percentiles. Just what to fix before the real interview.

✓

Strong

Clear ownership of the caching layer. You explained the TTL trade-off without prompting.

Thin

Didn't address failure modes. A senior interviewer will follow up here — you need a sharper answer.

Watch out

"I think," "maybe," "kind of" — over-qualifying every answer reads as uncertainty even when you're right.

The AI Mock Interview for People Who Freeze on the Call.

From sign-in to scored feedback

What an Ari session looks like

Questions built from your actual work

A real conversation, not a form

Specific. Not a score.

Start free. No tricks.

We're building in public

Questions, answered