Stop staring at a blank page.
Get a cover letter in 30 seconds.
Paste any job description. CareerBrains reads your resume and the role together — then writes a compelling, personalised cover letter that sounds like you wrote it yourself.
Senior Product Designer · Stripe
Confident tone · Generated just now
Dear Hiring Manager,
I'm writing to express my strong interest in the Senior Product Designer role at Stripe. Having spent the last 4 years building design systems at Plaid, I've developed the depth of product thinking and the eye for developer experience this role demands.
In that time, I led a team of 3 designers delivering a dashboard redesign that reduced support tickets by 31% and improved activation by 18%. I also established Plaid's first component library, now used across 6 product teams.
What draws me to Stripe is your approach to financial infrastructure as a product problem. That perspective aligns exactly with how I approach every design decision.
I'd love to explore how my experience maps to what you're building.
Kind regards,
Alex Kim
Written in 30 seconds
Paste a job description and get a full tailored letter — no prompts, no forms to fill in.
Sounds like you
AI writes from your actual resume, not a template — the result is specific and genuinely human.
Any tone, any industry
Choose professional, confident, or conversational to match the company's culture exactly.
Cover letters are the worst part of job searching
You already know your experience is good. Convincing someone else of that — in a page, under pressure, for every single application — is a different skill entirely.
Takes 2+ hours
That adds up to days of effort across a full search.
Per cover letter, written from scratch
Blank page dread
It's the top reason people skip letters entirely and lose out.
Most people don't know how to start
Same letter, different job
Recruiters spot a recycled opener in seconds.
Generic letters get screened out fast
Wrong tone or length
Getting it wrong signals you didn't read the room.
Too formal, too casual, or too long
CareerBrains solves all four in 30 seconds. Try it free
How it works — four steps, 30 seconds
No forms to fill in, no prompts to write. Just your resume and the job description.
Upload your resume
Your skills, experience, and career story become the AI's raw material. Upload once; every cover letter draws from the same source of truth.
Pick or paste the job
Select a job from your matched feed, or paste any job description from anywhere — LinkedIn, Indeed, a company's own careers page.
AI reads both and writes
Our AI cross-references your experience against the JD, identifies the strongest story to tell, and writes a letter that sounds human — because it understands context, not just keywords.
Review, edit, and send
The letter is yours to refine. Make any edits you want, then copy, download, or attach it directly to your application.
You watch as the letter takes shape — personalised to your background and the exact role, structured to tell the right story in the right order.
- Opens with a role-specific hook that references the company by name
- Pulls your strongest achievements directly from your resume
- Matches your chosen tone — professional, confident, or conversational
- Closes with a clear, confident call to action every time
I am writing to express my strong interest in the Senior Product Designer role at Figma. With 6 years of product design experience and a track record of shipping features to 2.4M users…
Generic vs. AI-generated cover letter
The difference is real, and recruiters feel it in the first three sentences.
"I am writing to express my interest in the Software Engineer position at your company. I have 5 years of experience in software development and I believe I would be a great fit for this role."
"The moment I saw Stripe's job description mention 'building financial infrastructure for the internet', I knew this was the role I've been building toward. Over the last 5 years, I've worked at the intersection of payments and developer tooling — most recently reducing API error rates by 38% at Plaid, which directly increased developer trust scores by 21 points."
"In my previous role, I worked on various projects that involved backend development and team collaboration. I am a quick learner who works well under pressure and enjoys solving challenging problems."
"At Plaid, I led backend infrastructure work for a team of 8 engineers shipping to 6,000+ fintech customers. The role demanded exactly the combination you describe — deep ownership of distributed systems, close collaboration with product, and the ability to translate ambiguous requirements into production-grade APIs at speed."
Six elements every AI letter includes
Each one written from scratch for your specific background and the specific role — never from a template.
A role-specific opening
Cuts straight to why you're the right person for this exact role — referencing the company name, the specific title, and what drew you to the opportunity. Never a recycled opener.
Experience paragraph matched to the JD
Selects the two or three strongest parts of your background that map to the job requirements — then writes about them in the employer's own language.
Quantified achievements highlighted
Pulls measurable results from your resume — team sizes, growth numbers, delivery timelines — and leads with them to back up every claim.
Genuine motivation paragraph
Explains why you want this particular role at this particular company — drawing on the JD's language about culture, mission, or tech stack to sound specific rather than generic.
Confident, professional close
Ends with a clear call to action — inviting a conversation, not begging for a chance. Tone-matched to the company's seniority level throughout.
Right length, every time
Structured to fit a single page at a comfortable reading pace — three to four focused paragraphs. No rambling, no padding, nothing that makes a recruiter skim.
Choose a tone that matches the company's culture
A Goldman Sachs application demands different language than a Series A startup. Before generating, pick the tone that fits — and the AI writes every word to match it.
You can also regenerate in a different tone with one click if the first version doesn't feel quite right. No extra prompting needed.
"The AI got the tone exactly right for a startup — direct, specific, no fluff. I copied it almost word for word."
Polished, formal, ideal for corporate, finance, and legal roles
Direct and assertive — strong for senior IC or leadership applications
Warm and energetic — perfect for startups, creative, and product roles
Friendly and approachable — works well for small teams and culture-first companies
Works for every stage and situation
Whether you're writing your first cover letter or your hundredth, the AI adapts to your situation.
Your first application
Don't know what to say? The AI knows how to position a limited track record confidently — leading with your strongest signals even if experience is thin.
Going for a stretch role
Applying above your current level? The AI frames your achievements as preparation for the next step — not proof you lack experience.
Career change
The hardest letter to write is for a role in a new field. AI bridges the gap — identifying which of your transferable skills are most relevant and leading with them.
High-volume job search
Applying to 30 roles? Generate a genuinely tailored letter for each one in seconds — not a mail-merge template, a real bespoke letter every time.
Cold outreach
Reaching out to a company that isn't hiring? A targeted, story-driven cover letter dramatically improves reply rates on speculative applications.
Dream company application
When it really matters, take 30 seconds to generate a letter that's specific to the company's mission and makes a human case for why you belong there.
Context, not templates
Our AI understands what the job description is actually asking for — not just the words used. It reads between the lines so the letter addresses unstated expectations too.
Sounds human
The AI is fine-tuned to avoid the robotic cadence that gives AI-written text away. Varied sentence length, natural transitions, and a confident first-person voice throughout.
Grounded in your real experience
Every claim in the letter is backed by something in your resume. It will not invent achievements or add years of experience you don't have.
Why our AI writes better cover letters than generic tools
Most "AI cover letter" tools are template-fillers with your name dropped in. CareerBrains actually reads, understands, and synthesises your resume and the job description into a letter written for that exact combination.
The result is a letter that references the company's own language from the JD, leads with your most relevant achievement, and sounds like you had a conversation with a career coach before you sat down to write it.
Generate mine freeYour cover letter is 30 seconds away
Pair it with AI job matching, resume optimizer, and interview prep.
Cover Letter Generator FAQ
Answers before you generate your first letter.
Write your next cover letter in 30 seconds
Upload your resume once, paste any job description, and get a tailored, compelling cover letter that sounds like you — instantly.