AI writing tools in 2026 range from genuinely free tiers up to around $30 per month for premium plans, with the cheapest paid options sitting near $4 to $8 per month.
According to our AI tool database, Rytr offers a Free plan at $0, an Unlimited plan at $7.50 per month, and a Premium plan at $24.16 per month. Grammarly runs a Free tier for basic checks, a Pro plan at $12 per month, and custom Enterprise pricing. QuillBot starts at $0 for a limited free version and $4.17 per month on its annual Premium plan, while ProWritingAid lists a Free tier, Premium at $30 per month or $360 per year, Premium Pro at $12 per month or $144 per year, and one-time lifetime licenses at $399 and $699.
That spread matters because the sticker price is rarely the whole story — what you actually pay depends on how the tool charges you and what it counts as usage.
The reason prices vary so much comes down to what each tool is selling. Some tools sell raw generation volume — how many words or documents you can produce. Others sell correction and style intelligence layered on top of writing you already did.
Grammarly, for example, is described in our database as an AI writing assistant focused on context-aware style adjustment for academic, business, and email writing, plus logic structure optimization and Smart Drafts. That's a different product from a generator that spits out first drafts.
ProWritingAid's pricing structure illustrates another mechanism worth understanding: it offers both monthly and annual billing, and the annual Premium Pro rate of $144 per year works out to a lower effective monthly cost than the monthly Premium tier. Annual billing is almost always cheaper per month, but it locks you in — and that's the trade-off, not a discount you get for free.
Here's a concrete worked example. Say you write roughly 20 short blog posts a month and want help with both drafting and cleanup. You could pair Rytr's Unlimited plan at $7.50 per month for draft generation with QuillBot's annual Premium at $4.17 per month for rewriting and paraphrasing.
That's a combined effective cost under $12 per month for two tools covering two jobs. Compare that to buying ProWritingAid Premium at $30 per month for editing alone, which is more than double — but it buys deeper style and grammar analysis rather than generation. Neither combination is "better" in the abstract.
The right pick depends on whether your bottleneck is a blank page or a messy draft. If you're unsure which side of that line you're on, the breakdown in What's the best AI writing helper free option in 2026, and where does it actually stop being free? walks through where free tiers actually run out.
Now the limits, and they matter. First, prices change — the figures above are a verified snapshot from our internal database, and vendors adjust plans, rename tiers, and retire discounts regularly. Treat any specific number as a starting point and confirm on the vendor's own page before you commit.
Second, "per month" is slippery: QuillBot's $4.17 rate is an annual plan figure, so paying monthly will cost more, and ProWritingAid's lifetime options at $399 and $699 are one-time payments that only make sense if you'll still be writing in several years. Third, free tiers usually cap something — word count, documents, or features — and the cap is where the real decision lives.
A useful tip: before upgrading, check whether your actual usage would have hit the free limit at all. Many people pay for headroom they never touch. And if a tool raises its price after you subscribe, that's a separate problem worth understanding before you renew.