Boon · Cover letter builder
When a great resume is not enough, an inspiring cover letter can make all the difference. Boon writes it with you.
Free to start No credit card Export PDF
Tell Boon the job and why you want it, and a real first draft comes back — built from your answers, aimed at that posting.
Ask Boon in plain words for a warmer tone, a shorter opening, a different angle. It rewrites, you keep or undo it. You are the boss.
Boon is a career companion, not a one-off tool. Send this letter, then come back for the next role — and the interview after it.
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How it works
Four steps from the job posting to a letter you’re proud to send.
Choose the look that fits the role, then make it yours — colour, type and spacing.
The company, the role, why you want it — or just paste the posting and let Boon read it.
Boon writes the opening, the argument and the close — you keep every final word.
Send it with your matching resume, then reuse it for the next role.
Or paste the job posting
Boon · drafting
Paragraph two repeats your resume — want it to answer what the posting asks for instead?
Your cover letter is ready
Download PDF
Cover letter templates
Real letterheads, designed to match the resume templates — the same eleven colourways, always readable. Pick one, recolour it in a click.
The experience
Four moments from the real product, before you sign up for anything.
A live checklist maps the letter from the first line to the sign-off, so you always know what’s left.
Plain questions in a plain form — the job, the company, your reasons. Boon turns the answers into paragraphs.
Watch the page update as you write. What you see is exactly what the hiring manager opens.
Ask for a warmer tone, a sharper opening, or an honest read on whether the letter answers the posting.
Matched set
Same template family, same colourway, one click. The hiring manager sees one candidate — not two documents.
Why Boon
A cover letter has one job — convince a person. Boon is built for that.
Boon reads your letter the way its one reader will — what lands, what sounds like everyone else — and tells you what to change.
You don’t need the right question. Ask Boon to look, and it names what’s weak — a generic opening, a claim with no proof, a limp close.
Start on your computer, continue on your phone, finish on your tablet. Your letter follows you — always in sync, always ready.
2.1×
more replies when a tailored letter accompanies the resume
12 min
median time from job posting to a finished first draft
89%
of members say the letter finally sounds like them
Boon member cohort, January–June · self-reported.
A Boon member story
I had the resume. What I never had was a letter that sounded like me — Boon fixed that in an afternoon
2,483 verified reviews
“Five weeks from spray-and-pray to senior PD at Linear.”
“System-design prep that felt like a senior staff engineer on call.”
“Counter-offered up $34k base and an accelerated cliff — with one prompt.”
“Ate the chaos: tabs, recruiter DMs, half-written cover letters — gone.”
Pricing
$ 0 Free forever
Write your first cover letter with Boon.
$ 19.99 /mo
Letters and resumes, downloaded as PDF.
$ 49.99 /mo
More AI credits, for a letter every week.
FAQ
The things people most want to know before they write their first letter with Boon.
One page — three to four short paragraphs. Every Boon template is built for that length, and Boon tells you when a paragraph is doing the resume’s job instead of the letter’s.
Boon drafts with you: it turns the job, the company and your reasons into paragraphs, then rewrites and reviews whenever you ask. You are the boss — every line is yours to keep, change or undo.
Yes. Give Boon the role and company — or paste the posting — and it shapes the argument around what that job actually asks for, so every letter reads written-for-them, not copy-pasted.
Yes. Letter templates and resume templates share one colour system — the same eleven colourways — so you can set both documents to the same colour and hand over a matched pair.
PDF, Markdown and plain text. Markdown and plain text are free on every plan; the PDF needs a paid one, because it is the only format that keeps your letterhead, colours and fonts. Your letter stays in Boon, so you can adapt it and re-export for the next role.
Upgrading from Free is self-serve in the Boon app. To cancel, go to Settings → Payments: you keep your plan until the end of the period you've already paid for, and can reactivate any time before then. Moving between two paid plans isn't self-serve yet — cancel first, then start the new one when the current period ends.
Your content is yours. We never use your chats, files or prompts to train Boon's models, and we contract the AI providers we work with so they don't either. We don't sell your personal data — though we do share limited cookie and device identifiers with advertising partners for campaign measurement and retargeting, which you can opt out of where the law allows. Your content is never part of that: it travels encrypted and is protected at rest by encryption and access controls.
Your next interview is waiting
Write a cover letter that gets read — free to start, ready when you are.
