True cost comparison — not just what the pricing page says
Quick Verdict
Grammarly saves you 100%
Best for Sketch
AI writing assistant for grammar, clarity, and tone. Free plan is basic, then $12-$15/user/mo for fu
Best for Grammarly
Mac-only design tool. Standard plan $12/editor/mo. Simpler than Figma but limited to macOS and less
Mac-only design tool. Standard plan $12/editor/mo. Simpler than Figma but limite...
Advertised
$12
/month
True Cost
$20
/month (typical)
Mac Hardware Requirement
Sketch runs only on macOS. Teams must buy Macs ($1,000-2,500 each). This is the biggest hidden cost ...
Business Plan for SSO
SSO/SAML requires Business at $20/editor/mo — 67% more than Standard. Required for any company with ...
AI writing assistant for grammar, clarity, and tone. Free plan is basic, then $1...
Advertised
$0
/month
True Cost
$12
/month (typical)
AI Writing Assistance Limits
Generative AI features (rewrite, compose, ideate) have monthly prompt limits. Premium gets 1,000 pro...
Premium Required for Full Features
Free plan only catches basic grammar and spelling. Clarity, tone detection, word choice, formality l...
Per-Seat Team Pricing
Grammarly Business at $15/user/mo. A 50-person team = $750/mo ($9,000/yr). Team analytics, style gui...
Grammarly advertises $0/mo. Sketch advertises $12/mo.
Grammarly has 3 documented hidden fees. Sketch has 2.
Grammarly confidence: 76%. Sketch confidence: 74%.
| Metric | Sketch | Grammarly | Winner |
|---|---|---|---|
| Advertised Price | $12/mo | $0/mo | Grammarly |
| True Monthly Cost | $20/mo | $12/mo | Grammarly |
| Hidden Fee Total | +$8/mo | +$12/mo | Sketch |
| # Hidden Fees | 2 | 3 | Sketch |
| Confidence Score | 74% | 76% | Grammarly |
| Pricing Tiers | 0 | 3 | — |
| Affiliate Program | None | None | — |
Sketch advertises $12/mo and Grammarly advertises $0/mo. However, when you include hidden fees, Sketch has 2 documented hidden fees adding +$8/mo, while Grammarly has 3 hidden fees adding +$12/mo. Based on true cost, Grammarly is typically 100% cheaper.
Sketch has 2 documented hidden fees: Mac Hardware Requirement, Business Plan for SSO. These add approximately +$8/mo on top of the $12/mo advertised price.
Grammarly has 3 documented hidden fees: AI Writing Assistance Limits, Premium Required for Full Features, Per-Seat Team Pricing. These add approximately +$12/mo on top of the $0/mo advertised price.
Choose Sketch if: AI writing assistant for grammar, clarity, and tone. Free plan is basic, then $12-$15/user/mo for fu. Choose Grammarly if: Mac-only design tool. Standard plan $12/editor/mo. Simpler than Figma but limited to macOS and less . The right choice depends on your team size, usage volume, and which features you need most.
This comparison is based on manual research of official pricing pages, terms of service, and user reports. Sketch data has a 74% confidence score and Grammarly has 76%. Prices were last verified in April 2026. For the most accurate estimate, enter your specific usage in our calculator.
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