Grammarly vs Perplexity Comet
Which one should you pick? Here's the full breakdown.
Grammarly
AI writing assistant that catches errors everywhere you type -- now with full AI rewriting
Perplexity Comet
Perplexity's agentic AI browser -- FREE on all platforms as of 2026-03-18 (previously $200/mo Max-only). iOS, Android, Windows, Mac. Browses the web, executes multi-step tasks, and summarizes pages in-line. Comet Plus ($5/mo) adds premium publisher content
| Category | Grammarly | Perplexity Comet |
|---|---|---|
| Ease of Use | 10.0 | 8.0 |
| Output Quality | 7.0 | 8.0 |
| Value | 7.0 | 9.5 |
| Features | 8.0 | 8.0 |
| Overall | 8.0 | 8.4 |
Pricing Comparison
| Feature | Grammarly | Perplexity Comet |
|---|---|---|
| Free Tier | Yes | Yes |
| Starting Price | $0 | $0 |
Which Should You Pick?
Pick Grammarly if...
- ✓Easier to use (10 vs 8)
Non-native English speakers, professionals who write lots of emails, and anyone who wants a passive grammar net running in the background. It catches things you'd miss.
Visit GrammarlyPick Perplexity Comet if...
- ✓Higher output quality (8 vs 7)
- ✓Better value for money (9.5/10)
Users who already use Perplexity for search and want an agent browser that can complete multi-step tasks (booking, research, shopping, document summarization) across tabs. Also a strong introduction to the AI-browser category for anyone curious but unwilling to pay $200/mo for a preview -- the 2026-03-18 free rollout makes evaluation risk-free.
Visit Perplexity CometOur Verdict
Perplexity Comet edges out Grammarly with a 8.4 vs 8.0 overall score. Both are solid picks, but Perplexity Comet has the advantage in output quality.