TOOLNAVIA / BUYING GUIDE
Grammarly Free vs Pro: Is $144 a Year Worth It?
The short answer
# Grammarly Free vs Pro: Is $144 a Year Worth It?
Grammarly Free is enough for many people. It catches core spelling and grammar issues, shows tone, and includes 100 generative-AI prompts each month. Pro becomes worth considering when you repeatedly need sentence rewrites, advanced tone control, plagiarism or AI-detection tools, or far more AI prompts inside the apps where you already write.
The price is not simply "$12 a month." Pro costs $144 per year, averaging $12 monthly but billed annually. The same plan is $60 every three months or $30 month to month.
At a glance
- Best for
- Frequent writers who have tested and repeatedly use advanced editing features.
- Price model
- Free $0 · Pro $144/year, $60/quarter or $30/month
- Check first
- Regional/channel price and prompt allowances can differ; detection is not proof; tracking disabled.
The real cost
Before tax or regional pricing: - Free: $0. - Annual Pro: $144 for 12 months. - Quarterly Pro: $60 every three months, or $240 if renewed four times. - Monthly Pro: $30, or $360 if kept for a year.
Annual billing saves $216 against twelve monthly payments and $96 against four quarterly payments, but it requires $144 upfront. For one deadline, a $30 month can cost less than an annual plan you will not use. For daily editing, annual has the lowest ongoing cost.
What Free covers
Free is the practical default for spelling, grammar, punctuation, tone, and 100 AI prompts each month. It is usually enough for occasional emails, short messages, and a light proofreading pass. Start there if you cannot name a paid feature that would change your workflow.
Free is also a safer test if you already pay for ChatGPT, Claude, Gemini, or another assistant. Those tools overlap with drafting and rewriting. Grammarly's distinctive convenience is that suggestions appear in many places where you type, but that only matters if you use it often.
What Pro adds
Pro adds full-sentence rewrites, advanced tone adjustment, fluency guidance, unlimited personalized suggestions, plagiarism checking, AI detection, and 2,000 prompts per month.
The allowance is 20 times Free's published limit, but volume alone is not a reason to buy. Upgrade when advanced suggestions repeatedly save time. Pro is easier to justify for daily client emails, reports, proposals, support replies, or publishable copy. It is harder to justify for occasional writing or when you mainly need a separate research and long-form drafting tool.
Detection is a signal
Plagiarism and AI detection can flag possible overlaps or passages to review. They do not prove authorship or misconduct. Use the result as one input and follow your school, employer, or publisher's review process.
Check Pro versus Premium
Official support currently distinguishes web Pro from app-store Premium in some accounts. Pro includes 2,000 prompts; Premium can include 1,000. Pro also includes team features. Before paying, confirm the plan name, prompt allowance, billing period, and renewal price in checkout.
Trial details can vary
The public plans page currently shows a seven-day trial. An independent reviewer saw ten days in an account in September 2026. Treat your checkout as controlling and set a reminder before it ends. A trial tests whether rewrites and tone controls save time; it does not prove an annual plan will pay for itself.
Which plan?
Choose Free when core corrections and tone are enough, 100 prompts cover your needs, you write occasionally, or you already use another drafting tool. Consider one month of Pro for a short project or to test advanced rewrites without committing $144. Choose annual Pro when you write professionally most days, advanced edits repeatedly reduce review time, plagiarism checking is recurring, you expect to exceed 100 prompts, and you have tested the workflow.
Bottom line
Start with Free unless a specific Pro feature solves a repeated problem. Pro becomes a sensible annual expense only when inline rewrites, tone controls, detection tools, or higher prompt volume save enough time to justify $144 upfront. Eligible students should compare the separate student-offer guide; everyone else should verify the standard checkout before paying.