True cost comparison — not just what the pricing page says
Quick Verdict
Grammarly saves you 5%
Best for Miro
AI writing assistant for grammar, clarity, and tone. Free plan is basic, then $12-$15/user/mo for fu
Best for Grammarly
Online collaborative whiteboard for teams. Free plan limits to 3 boards, then $8-$16/member/mo — but
Online collaborative whiteboard for teams. Free plan limits to 3 boards, then $8...
Advertised
$0
/month
True Cost
$16
/month (typical)
3 Editable Board Limit on Free
Free plan restricts to 3 editable boards total. Once filled, existing boards must be deleted to crea...
Miro Assist AI Add-On
Miro Assist (AI-powered diagramming, mind mapping, sticky note generation) requires Business plan ($...
Guest Access Restrictions
Free plan has no guest access. Starter allows limited external guests (day passes). Full guest colla...
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. Miro advertises $0/mo.
Grammarly has 3 documented hidden fees. Miro has 3.
Grammarly confidence: 76%. Miro confidence: 73%.
| Metric | Miro | Grammarly | Winner |
|---|---|---|---|
| Advertised Price | $0/mo | $0/mo | Miro |
| True Monthly Cost | $16/mo | $12/mo | Grammarly |
| Hidden Fee Total | +$16/mo | +$12/mo | Grammarly |
| # Hidden Fees | 3 | 3 | Miro |
| Confidence Score | 73% | 76% | Grammarly |
| Pricing Tiers | 3 | 3 | — |
| Affiliate Program | No public affiliate program | None | — |
Miro advertises $0/mo and Grammarly advertises $0/mo. However, when you include hidden fees, Miro has 3 documented hidden fees adding +$16/mo, while Grammarly has 3 hidden fees adding +$12/mo. Based on true cost, Grammarly is typically 5% cheaper.
Miro has 3 documented hidden fees: 3 Editable Board Limit on Free, Miro Assist AI Add-On, Guest Access Restrictions. These add approximately +$16/mo on top of the $0/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 Miro if: AI writing assistant for grammar, clarity, and tone. Free plan is basic, then $12-$15/user/mo for fu. Choose Grammarly if: Online collaborative whiteboard for teams. Free plan limits to 3 boards, then $8-$16/member/mo — but. 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. Miro data has a 73% 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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