VS
Head-to-Head Comparison
Otter.ai vs Grammarly
An honest, side-by-side breakdown of pricing, features, and security — so you can pick the right tool.
Feature comparison
| Feature | Otter.ai | Grammarly |
|---|---|---|
| CompareMyAI score | 7.6 / 10 | 8.1 / 10 |
| Free tier | ||
| API access | ||
| Open source | ||
| Enterprise ready | ||
| GDPR compliant | ||
| SOC 2 certified | ||
| ISO 27001 | ||
| MFA supported | ||
| Trains on your data | Yes |
Pricing
FreeFree
Pro£13/mo
Business£24/mo
EnterpriseContact us
G
FreeFree
Pro£10/mo
EnterpriseContact us
Prices in GBP. Verified monthly. Always check the provider's site for the latest.
Pros & cons
Otter.ai
Pros
- +Excellent meeting transcription and summarisation
- +Integrates with Zoom, Teams and Google Meet
- +Good accuracy on clear audio
Cons
- −Struggles with heavy accents or poor audio quality
- −Free tier limited to 300 minutes per month
- −Not useful outside meeting and transcription use cases
Grammarly
Pros
- +SOC 2 Type II and ISO 27001 certified — strongest compliance in the writing category
- +Works across browser, desktop, Word, Google Docs, and email with one install
- +Pro tier confirmed at £10/mo in GBP — transparent UK pricing
- +Explicit opt-out from AI model training available in account settings
Cons
- −Trains on user writing by default — opt-out required
- −GDPR compliance not explicitly confirmed on accessed official pages
- −Free AI prompt limit (100/mo) may feel restrictive for daily users
Our take— Grammarly wins
Based on our comparison of published pricing, features, and compliance data, Grammarly scores 8.1/10 to Otter.ai's 7.6/10. Grammarly pulls ahead with ISO 27001 certification. Otter.ai counters with GDPR compliance. Pick Grammarly if ISO 27001 certification matters; pick Otter.ai if GDPR compliance matters.