A cover letter that matches the resume
Written from your resume and the posting it's aimed at, then checked against both before you see it — a number, an employer or a skill that isn't yours gets the draft rejected. Nothing invented. Edit any line, then copy it or download it.
Not sure your resume is even readable? Run the free ATS checker →
Atlas
Cedar
Harbor
Marigold
One letter, four letterheads: it takes its resume template's own type and accent, so the two documents read as one set. Copy it as plain text for the application form — that's where letters usually go — or save it and download the PDF to attach.
How it works
Bring a posting and a resume
Start a letter straight from the job description, or tailor the resume first and let the letter follow it. Both sources are required — they are the only two the letter may draw on.
Read it, then pick a tone
Direct, warm or formal — all three free. Tone re-drafts the letter: the greeting, the opening, the phrases that carry each point. The facts underneath don't move.
Make it yours
Edit any paragraph in place, then copy it or take the .txt. Save it and it waits under Cover letters — with a PDF set in your template.
The letter can only say what you can back up.
Most AI cover letter tools will happily write that you're “passionate about the mission” and “thrived in fast-paced environments” — sentences that are true of no one and survive no interview. Worse, some will quietly hand you a skill the posting asked for and you never claimed.
Ours uses a model too — and gives it two sources and no others: your resume and the job description you pasted. If the posting wants something that isn't in your resume, the letter leaves it alone — and you get to decide what to do about the gap, which is a far more useful thing to know than a fluent lie.
The blunt version: a model writes it, and then it has to prove it. The draft comes back with the resume lines it drew on, and every number, quotation, company, school, tool and job title in it is tested against your resume and the posting. Anything neither document supports is rejected — the model gets one more try with the failures named, and if it fails again you get a letter built from your own lines instead, with the substitution shown rather than hidden.
That is a smaller claim than the industry makes. Everyone says their letter won't invent anything; ours is the one where a sentence has to get past a checker to reach you.
Questions
- Does it make things up?
- No, and that's checked rather than promised. The letter has two sources — the resume you tailored and the job description you pasted — and after the draft is written it gets taken apart in code and tested against both. Every number, every quoted phrase, every company, school, tool and job title has to appear in one of those two documents or the draft is thrown out. It can rephrase and emphasise what's in your resume; it can't award you a skill, a job or a figure you didn't put there. If a posting wants something you don't have, the letter won't claim it — and you'll see that gap rather than have it papered over.
- Is it written by AI?
- Yes — and what happens next is the part worth reading. The model gets your resume and the posting and nothing else, and it has to hand back the resume lines it drew on for each paragraph. Then code checks it: a number that isn't in your resume, a quotation neither document contains, a company you never worked at, a title you were never given, a cited line that isn't really on your resume — each of those is a rejection. The model gets one more attempt with the exact failures named. If the second draft fails too, you get the letter our deterministic writer builds out of your own lines instead, and the screen tells you that's what happened rather than quietly serving it. That fallback writer is also what a free account gets once its one AI letter is used.
- Do I need to tailor a resume first?
- No. You can start a letter straight from a posting — no finished tailoring run required. What you can't skip is the resume itself, and the free account that lets us read one in: every fact in the letter is lifted from a resume, so there has to be one to lift from. Tailoring first is still the better order when you have the time: the resume and the letter then lead with the same things, which is what a hiring manager reading both actually notices.
- Can I change the tone?
- There are three — direct, warm and formal — and switching re-drafts the letter rather than restyling it in your browser: tone is an instruction to the writer, so the greeting, the opening sentence, the phrases that carry each piece of evidence and the sign-off all change with it. What never moves is the evidence underneath — the same resume lines back the letter whichever voice you pick, because tone is allowed to change how a fact is said and never which facts there are. All three are free. We used to charge for two of them, which was three phrasings of one template sold as a feature; that's retired.
- Is the cover letter free?
- A complete letter is free — every tone, editable, copyable, downloadable, no watermark and nothing held back. What a paid plan buys is the writer: Pro has the model write every letter, while free gets 1 model-written letter and then the deterministic writer, which quotes your own resume lines and the posting's own requirements and is a real letter rather than a teaser. Save as many letters as you like on any plan. It's the split our resume templates use, where Atlas is free and the rest are paid: what Pro buys is more of the thing, not permission to use it.
- Can I edit it?
- Every paragraph, in place. Click a line and type — no separate edit mode, and nothing you write gets overwritten by a regeneration you didn't ask for. Once the letter is saved, edits keep saving as you go, so you can leave and come back to your version rather than to a fresh draft.
- What format do I get?
- Three ways out. Copy to the clipboard and download a plain .txt work immediately: text is the format that matters most days, because cover letters get pasted into an application form far more often than they get attached. The third is a PDF typeset in your resume's template — same letterhead, same accent, same face — and it comes with the saved letter, so it appears once you've saved.
- Should I send a cover letter at all?
- When the application has a field for it, yes — a short, specific letter is one of the few places you can explain a career change, a gap, or why this particular job. When there's no field, don't force one. And keep it under a page; nobody reads the second one.
Pro is $9 a month, or $39 once for lifetime access. See what's included →
Write the letter.
Bring the posting you're actually applying to. If you'd rather fix the resume first, that door is still open — both end with two documents that say the same true thing.