Is the fit check free?

Yes, for any posting, and it does not count toward your applications. Only writing the resume and cover letter for a role counts, and the first three of those are free with no card.

How is this different from an ATS resume checker?

An ATS checker counts the posting's keywords in a resume you already wrote. The fit check runs before any writing and asks a different question: does something you actually did support each requirement? Airtight also checks keywords and structure, but on the documents it writes for the posting, after the fit is known.

What do the verdicts mean?

Strong fit: your history covers the core requirements. Potential fit: it depends on examples you can confirm. Mixed fit: there is a credible angle, and some requirements will need an honest explanation. Stretch role: your history supports part of it. Career pivot: your base is real but the move needs clear transferable examples. All of them are a read on the posting, not a prediction.

What happens when it asks me a question?

A requirement marked needs your input comes with one question, such as how large the migration was. You answer in a sentence. The requirement moves to supported, the answer goes into your documents when you update them, and it stays in your history for the next application.

Yes, in both directions. It is AI reading your history against a posting, so it can miss evidence that is there or read too much into a line. That is why every mark shows its evidence and its source, why it asks rather than assumes, and why nothing it says blocks you.

Does it work for jobs outside tech?

Yes. Paste any posting in any field and the check runs the same way. Job discovery is where coverage is deepest in software, data, product and design; the fit check has no such limit.

Fit check

Know where you stand before you apply.

Paste a posting. In about thirty seconds every requirement in it is measured against your real work history, under whatever title it happened: supported, with the evidence; needs one example from you; or not yet supported, with a note on how to position it. Then you decide whether the evening is worth it.

Check a posting, free

Three applications free. No card, no clock.

Strong fit

Supported by your history: 2 of 4 requirements.

Core requirements (3): 2 supported, 1 needs your input, 0 not yet supported.

Your history covers the essentials. Check the details before you apply.

All 4 requirements

2 supported1 needs input1 not yet supported

5+ years leading product for a payments or billing platform
Core requirement
Led the checkout and invoicing roadmap at Fabrikam for four years; owned the move from a legacy billing system to a new provider.
Profile source: Fabrikam, Product Manager to Senior Product Manager, 2021 to 2025
Experience working with risk, compliance and finance partners
Core requirement
Ran the chargeback and dispute process with finance; the compliance review for the card-on-file launch.
Profile source: Fabrikam, Senior Product Manager
Has taken a large migration from plan to completion
Core requirement
Your history mentions the billing migration but not its size or outcome.
Needs your input
How many customers or how much volume moved, and over what period? One line here goes into your documents.
Add a relevant example
Comfortable with SQL for your own analysis
Supporting detail
Not yet supported
Nothing in your history mentions SQL. If it is true, add it to your profile; if not, the cover letter can name the analyst partnership instead.

Thirty seconds to a verdict

01
Your history, once
Import a resume or fill in your profile: employers, titles, dates and what you actually did. Ten to twenty minutes, and every check after that reads from it.
02
Paste the posting
A link or the text. The requirements are read out of it and sorted into core requirements and supporting details, because postings over-list and a detail should not turn a real chance into a hard no.
03
Read the fit
Each requirement is marked supported, needs your input, or not yet supported, with the evidence beside it and the profile line it came from. A verdict on top: Strong fit, Potential fit, Mixed fit, Stretch role or Career pivot.
04
Answer, then write
Where a requirement wants one example, you give it in a sentence and it goes into your history for good. Then the resume and cover letter are written for this posting, and checked back against your history before you see them.

What the check tells you

Not a keyword count. The question for every requirement is whether something you did supports it, and what to say about it if not.

Evidence, not a score
A supported requirement shows the work that supports it and which role it came from. You can read why, not only how much.
Under whatever title it happened
A support lead who ran the escalation process has evidence for a program management requirement. The check reads what you did, not the title you had.
Core versus supporting
Requirements that decide the role are weighed separately from the details, so five nice-to-haves cannot outvote the three things that matter.
One question per gap you can close
Where your history is thin, the check asks for one real example. Your answer moves the requirement to supported and is kept for every later application.
Gaps named, never filled
A requirement nothing supports stays marked as such, with a note on how to position it honestly. Nothing is invented to cover it.
Free for any posting
The fit check does not count toward your applications. Check ten postings and write documents for the two worth it.
The prep sheet
The same map exported as an editable Word file for the interview: every requirement, the evidence, and the questions still open.
The fact check after writing
Once the resume and cover letter are written, every employer, title, date and claim in them is read back against your history and anything unsupported is flagged before you send.

Fact check

Every line you send survives the interview.

Writing with AI is easy; every tool does it now, and every one says review it before you send. Airtight does the reviewing. After the documents are written, each claim is read back against your history: the employer, the title, the dates, the number, the skill. Anything the history does not hold is flagged, with what the history says instead.

Checks the finished resume and cover letter, not the prompt. What you would send is what is checked.
Flags, never blocks. The check is AI too and can be wrong in both directions, so it advises and you decide.
Edit any line yourself and re-check it. Make it stronger tightens a line and aims it at the job, from your history.
Gaps are reported, not papered over. A resume with a named gap beats one with a claim you cannot defend.

What the fit check is not

Said up front, because the tools in this category earn their bad name by hiding it.

It is not a hiring prediction. The verdict is a triage aid for deciding where to spend your evening; the employer decides the rest.
It is not a keyword scanner. Keyword coverage and structure are checked separately, on the written documents, against the posting.
It is not a guess about you. Every supported requirement points at something in your history. If your history is thin, the check is thin, and it says so.
It never applies for you. The check, the documents and the board end where the employer's form begins.

Common questions

Is the fit check free?: Yes, for any posting, and it does not count toward your applications. Only writing the resume and cover letter for a role counts, and the first three of those are free with no card.
How is this different from an ATS resume checker?: An ATS checker counts the posting's keywords in a resume you already wrote. The fit check runs before any writing and asks a different question: does something you actually did support each requirement? Airtight also checks keywords and structure, but on the documents it writes for the posting, after the fit is known.
What do the verdicts mean?: Strong fit: your history covers the core requirements. Potential fit: it depends on examples you can confirm. Mixed fit: there is a credible angle, and some requirements will need an honest explanation. Stretch role: your history supports part of it. Career pivot: your base is real but the move needs clear transferable examples. All of them are a read on the posting, not a prediction.
What happens when it asks me a question?: A requirement marked needs your input comes with one question, such as how large the migration was. You answer in a sentence. The requirement moves to supported, the answer goes into your documents when you update them, and it stays in your history for the next application.
Can it be wrong?: Yes, in both directions. It is AI reading your history against a posting, so it can miss evidence that is there or read too much into a line. That is why every mark shows its evidence and its source, why it asks rather than assumes, and why nothing it says blocks you.
Does it work for jobs outside tech?: Yes. Paste any posting in any field and the check runs the same way. Job discovery is where coverage is deepest in software, data, product and design; the fit check has no such limit.