Built from the index · not an editorial pick

Jasper vs Grammarly

Both tools as recorded in our index — entry price, free-tier caps, platforms, API and the drawbacks we logged. Prices come from each vendor's own pricing page.

Side-by-side comparison of Jasper, Grammarly
Criterion	Jasper AI writing assistants (ai writing) Paid	Grammarly AI writing assistants (ai writing) Freemium
Score	7.1/10	7.9/10 (best in this comparison)
Pricing model	From $59/mo	Free plan · from $12/mo
Entry paid plan	$59/mo	$12/mo (best in this comparison)
Free tier	No free tier	100 AI prompts/month; unlimited core grammar/spelling checks
Platforms	Web, API	Web, Desktop, Extension, Plugin, Mobile
API	Yes (best in this comparison)	No
Developer	Jasper AI, Inc.	Grammarly, Inc.
Launched	2021	2009
Pricing verified	August 2026	August 2026
Capability 30%	8.5	8.0
Value for money 25%	5.0	6.0
Ease of use 15%	7.0	9.0
Maturity 15%	8.0	10.0
Support & docs 10%	7.0	8.0
Momentum 5%	6.0	7.0
Where it falls short	No permanent free plan, only a 7-day trial that requires a credit card Does not fact-check output; can fabricate statistics, dates, and citations At $69/mo ($59/mo annual) per seat, weak value for creators publishing fewer than ~20 pieces/month	Users report price increases and billing/cancellation friction No public developer API for third-party integrations Free plan capped at 100 AI prompts/month, with frequent upsell prompts toward Pro
Go to source	Visit Jasper	Visit Grammarly

This pairing has no editorial write-up yet, so the page is excluded from search engines — we do not publish auto-generated comparison text. The numbers above are the same verified data used on each tool's own page: Jasper · Grammarly.