Cover Letter Builder for US Jobs —
Tailored, Keyword-Smart, Ready to Send
Paste the job description, add your best achievement, and tell us why this company. Our AI drafts a concise letter in US English — then edit and download a professional PDF. One credit costs $1.00; Candidate Pro includes unlimited generations.
How it works
Complete your profile
Add your candidate profile on Vaga Certa so we can align tone and skills.
Fill the builder
Paste the posting, your top win, and why this company — the inputs recruiters respond to.
Pay $1 or use Pro
Unlock a generation (or use Pro). Review, tweak, and download your English PDF.
Example output (illustrative)
Senior Software Engineer — structure: hook, proof, company signal, close
Dear Hiring Manager, When I came across Stripe's opening for a Senior Software Engineer, I immediately recognized the scale of the infrastructure challenges your payments platform faces daily — and how directly my background in distributed systems aligns with what your team needs. Over the past five years at Plaid, I've built and maintained high-availability APIs processing over $2B in annual transaction volume. Most recently, I reduced our payment failure rate by 34% by redesigning our retry logic with exponential backoff, and cut p99 latency from 420ms to 180ms through strategic caching at the API gateway layer. I'm fluent in Go and TypeScript, and I've led migrations of legacy monoliths to microservices architecture for three teams. Stripe's mission to increase the GDP of the internet is something I genuinely believe in. The way your team approaches developer experience — making complex financial infrastructure feel simple — is exactly the kind of challenge I want to work on. I've followed your engineering blog for years, and the recent post on your incremental migration to Sorbet reinforced that Stripe invests deeply in code quality and long-term maintainability. I'd love to bring my experience in high-throughput financial systems to your team. I'm available for a call anytime this week — please feel free to reach out. Best regards,
Your letter uses the employer and role you enter, plus your real achievements — always review before sending.
Why candidates use Vaga Certa
Keyword-aligned
Mirrors language from your pasted posting — helpful for ATS and human screeners.
Guided inputs
Forces the proof and “why this company” sections that generic generators skip.
PDF in English
Download a clean PDF with date and role line for US applications.
You stay in control
Edit every line before you apply. Never send unchecked AI text.
Frequently asked questions
What is a cover letter?
A cover letter is a one-page document sent with your resume. It introduces you, explains fit for the role, and highlights proof hiring managers care about. Many recruiters and hiring managers still read cover letters — especially when they are short, specific, and aligned with the job posting.
How long should a cover letter be?
Aim for 250–400 words (about three to four short paragraphs). Busy hiring teams prefer concise letters with clear impact and keywords from the job description — not long essays.
How do I write an ATS-friendly cover letter?
Use the job title and key skills from the posting in natural sentences, plain formatting, and standard fonts. Avoid text boxes, images, and unusual symbols. Save as PDF when the employer allows — our builder outputs clean text you can export as PDF.
Should I address the hiring manager by name?
When you are sure of the name and spelling, a personalized greeting helps. If you are not sure, “Dear Hiring Manager,” is widely accepted. Avoid “To Whom It May Concern.”
What is the best cover letter structure for 2025?
Lead with relevance to the role, then proof (achievements with outcomes), then a line showing you researched the company, and close with a confident, polite call to follow up. Problem–solution framing works well when it is grounded in real examples you provide.
How much does the AI cover letter generator cost?
One generation costs one dollar (USD) via secure checkout, unless you have Candidate Pro — Pro includes unlimited cover letter generations.
Can I download my cover letter as a PDF?
Yes. After generation you can download an English PDF formatted for job applications.
Should I use AI for my cover letter?
AI is strongest as a drafting partner: you supply accurate facts and the job posting, review the output, and personalize before sending. Never invent employers, titles, or metrics — hiring teams verify claims.
Ready to build yours?
Jump back to the builder, or explore jobs and generate from a live listing.
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