We Tested 6 AI Cover Letter Generators (Including Our Own)
We built SleevIx, so read this with that in mind. But we compared it against Zety, Resume.io, Kickresume, Grammarly, and Jotform on the things that actually decide whether a tool is useful: does it read your resume and the job posting together, can you edit what it gives you, and what do you actually get for free.
The short answer
If you want a tool that reads a job description and your resume together and writes a matched letter in one step, SleevIx, Grammarly, and Jotform all do that. Zety, Resume.io, and Kickresume are primarily template builders where AI assistance is layered on top, and the AI layer is usually paid. If your priority is a formatted resume and cover letter that look designed as a pair, Zety, Resume.io, and Kickresume win on that. If your priority is speed and zero cost, Jotform's tool is free with no account wall. Details and a full table below.
The comparison
| Tool | Job Description Matching | Resume Integration | Free Download | Cheapest Paid Plan |
|---|---|---|---|---|
| SleevIx | Paste a job posting, get a letter matched to it directly | Upload once, reused for every application | Yes, 5 full generations/month | $19/month |
| Zety | AI phrase suggestions inside a template, not one-step matching | Yes, tied to the resume builder | Plain text only, no formatted download | $5.95/mo billed yearly |
| Resume.io | Template based, not direct paste-and-match | Yes, tied to the resume builder | One resume, one template, limited (verify current terms) | $6.25/mo billed yearly |
| Kickresume | AI job-ad matching, paid tiers only | Yes, LinkedIn import on paid tiers | Yes, unlimited downloads on the free plan | $8/mo billed yearly |
| Grammarly | Yes, upload resume plus job details in one flow | Yes, DOC, DOCX, or TXT upload | Plain text draft only, formatted export needs Pro | $12/mo billed yearly |
| Jotform | Generates from resume and role details | Yes, resume upload supported | Yes, entire tool is free | No paid tier for this tool |
Competitor pricing and plan details are publicly listed rates as of July 2026. These companies change plans often, so confirm current terms on their sites before deciding.
Job description matching
This is the feature that actually saves time. SleevIx, Grammarly, and Jotform all let you paste or upload a job description and generate a letter written against it. Zety, Resume.io, and Kickresume are built around template libraries first. Their AI features suggest phrasing or fill in sections, but writing a letter that responds directly to a specific posting takes more manual editing on your end.
Resume integration
Every tool here accepts a resume in some form. The difference is what happens after. SleevIx stores your profile once and reuses it automatically for every letter you generate afterward, no re-upload. Grammarly and Jotform ask for the resume file each time you start a new letter. Zety, Resume.io, and Kickresume tie the resume into their builder so your cover letter can match your resume's visual design, which none of the writing-first tools (SleevIx, Grammarly, Jotform) offer, because none of them do resume design at all.
Output editing
SleevIx gives you an editable text output with no design layer, so you can rewrite freely but you won't get a styled document from it directly. Grammarly's editor is the strongest of the group for line-level revision: tone, formality, and clarity suggestions on top of whatever draft you start with. Zety, Resume.io, and Kickresume give you a visual template editor where you place and format text, which suits people who want a polished, designed document without touching a word processor.
Free tier, honestly
This is where most of these tools get less generous than the homepage suggests. Zety's free plan lets you build a resume but only export it as plain text, which strips all formatting, so a usable, formatted document requires a paid trial. Grammarly's free cover letter tool generates a draft but only as unstyled plain text, and a proper export needs Pro. Kickresume stands out here: its free plan allows unlimited downloads, though the AI matching tools are paid-only. Jotform's letter generator is free with no paywall we found on the tool itself. SleevIx's free tier gives 5 full generations a month, copy and download included, no separate paywall sitting on top of the output, just a monthly cap.
Where each one beats SleevIx
Being fair means saying this part plainly.
- Zety: a larger library of professionally designed resume templates. SleevIx does not build or design resumes at all.
- Resume.io: a matched resume and cover letter visual design in one builder, which is a cleaner result for anyone who wants a fully designed application packet.
- Kickresume: a genuinely unlimited free download policy, no monthly cap, even without paying for AI features.
- Grammarly: the strongest real-time grammar, tone, and clarity editing of any tool in this comparison, because that is Grammarly's core product.
- Jotform: zero cost with no upgrade wall found on the letter generator itself, the most straightforwardly free tool here.
SleevIx's limits, plainly
Free plan: 5 cover letter generations a month, 1 job feed, the AI humanizer is not included, and history is capped at your last 10 items. Pro is $19/month for 50 generations a month, 20 humanizer uses, up to 5 job feeds, and 200 history items. SleevIx does not build or design resumes and has no visual template library. Full details are on the pricing page, and you can see exactly what the output looks like on our sample cover letter page before signing up for anything.
See it on a real job posting
Paste a job description, get a letter matched to it. No template to fill in by hand.
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