Paste the job description. It reverse-engineers the interview.
Interview OS reads a job description, works out the rounds, the competencies each one tests and the difficulty, then runs the interview and grades you. Where a company's loop has been publicly documented it uses that, and says so. Where it has not, it runs a strong loop for the role family, and says that too.
What is Interview OS?
Interview OS is insiderOne's interview preparation and simulation system. It parses a job description into likely rounds, competencies and difficulty, researches how a specific company actually interviews where public reports exist, runs a timed mock interview with follow-ups, grades content and delivery, and shows the gap closing attempt over attempt. Employers can also use it to invite candidates to a one-shot screening interview.
Named mechanisms, not adjectives.
Every one of these is implemented and can be pointed at. On a product whose pitch is that claims get checked, the description of it cannot be the one place that is not.
Researched or generic, never a confident guess
A company playbook is either researched, meaning public reports about that company's loop were found and the sections say which parts, or it runs an advanced generic loop for the role family and says so. It never presents a hallucination about a company nobody has written about as fact.
The rubric lives on the server
You never see or submit the question text. The pending question, its rubric and its model answer stay server-side and your answer binds to them there. Elapsed time is the smaller of what your browser claims and what the server observed.
Follow-ups, and delivery as well as content
Up to eight questions per session with follow-ups when your answer invites one. Grading reads how you delivered the answer, not only what it contained.
Attempt over attempt
Every session is comparable to the last for the same company and role family, so you can watch the gap close rather than guess whether you improved.
Aptitude rounds, when a target actually runs one
Timed arithmetic drills are generated deterministically and scored without a model. They are offered only when the loop for your target role includes a screen of that kind, so nobody is sent to practise something they will never sit.
The same integrity checks as a skill challenge
Paste detection, injection detection and time budgets are shared with skill verification by import, not reimplemented, so they cannot drift apart.
In practice.
- Walk in knowing the shape of the loop instead of discovering it live.
- Practise the rounds a company actually runs, with the source shown when there is one.
- A graded report you can share, and a measurable improvement between attempts.
- Employers can send you a screening interview through the same system, so the practice is the real thing.
Against Generic mock interview apps and question lists.
| insiderOne | Generic mock interview apps and question lists | |
|---|---|---|
| Where the questions come from | The specific job description, and researched company loops where public reports exist | A generic list for the job title |
| Honesty about company specifics | Labelled researched or estimated, section by section, with sources stored | Presented as fact regardless |
| Follow-up questions | Yes, when your answer invites one | Usually a fixed list |
| Progress | Compared attempt over attempt for the same target | A score per session |
Questions, answered.
Does Interview OS know how a specific company interviews?
Where public reports about that company's loop exist, yes, and the playbook says which sections are researched and stores the sources. Where they do not, it runs an advanced loop for the role family and tells you it is generic. It will not invent a confident description of a loop nobody has documented.
How long is a session?
Up to eight questions with follow-ups. Practice sessions for the same company and role family have a six hour cooldown. Employer-invited screening interviews are one-shot.
Can I share my report?
Yes. A report can be made shareable, and employers who invited you to a screening see a summary built from the same session.