Pick Jasper if…
your team needs a steady supply of campaign, SEO and multi-channel content that sounds like your brand.
Jasper writes and Grammarly corrects. Jasper is a marketing platform that generates on-brand campaign and SEO content using stored Brand Voices, Audiences and specialised agents. Grammarly checks grammar, spelling and tone as you type, with AI rewrites on top. They overlap only on AI rewriting, and a marketing team can reasonably run both.
Pick Jasper ($69/mo per seat) if you need to produce marketing content at volume in a consistent brand voice. Pick Grammarly (free, or Pro at $30/mo monthly) if you write your own copy and want it checked for mistakes and tone.
| App | Free tier | Paid from | Top plan | Best for |
|---|---|---|---|---|
| Jasper | No | $69/mo | $69/mo | Marketing teams needing brand-consistent content at scale, SEO content ops, multi-channel campaigns |
| Grammarly | Yes | $30/mo | $30/mo | Non-native and casual writers who want real-time grammar, tone, and clarity fixes everywhere they type |
Monthly prices in US dollars before tax, from each vendor's official pricing (US list price; weekly-billed plans converted to a monthly figure). Updated November 2, 2026
| Jasper | Grammarly | |
|---|---|---|
| Main job | Generating on-brand marketing content | Real-time grammar, spelling and tone checks |
| Free option | No free tier; 7-day free trial | Free: real-time checks, tone detector, 100 AI prompts/mo |
| Paid plan | Pro: Canvas, marketing Agents, 2 Brand Voices, images | Pro: full-sentence rewrites, 2,000 AI prompts/mo, plagiarism check |
| Brand consistency | Brand Voices, Knowledge assets, Audiences | Tone detection and tone adjustment |
| Enterprise | Business: custom agents, API, SSO/SCIM, 12-month minimum | Enterprise: SSO, SCIM, DLP, audit logs API |
your team needs a steady supply of campaign, SEO and multi-channel content that sounds like your brand.
you already write the content and need it clean, correctly toned and checked for plagiarism.
They do different jobs. Jasper generates marketing content; Grammarly checks and polishes what you write. Grammarly's rewrites are designed for editing, not for producing campaigns.
Grammarly. It has a free plan, and Pro ($30/mo monthly, less billed annually) costs well under Jasper Pro ($69/mo per seat).
Yes, both quote-only. Jasper Business adds custom agents and API access on a 12-month commitment. Grammarly Enterprise adds SSO, SCIM, data loss prevention and audit logs.
How we choose: prices come from each vendor's official pricing page and are re-checked every week. We take no affiliate fees, so rankings aren't for sale.