Grammarly vs Opus Clip
Side-by-side comparison of Grammarly and Opus Clip.
AI writing assistant for grammar, tone, and clarity
Turns long videos into viral short clips automatically
What they are
Grammarly
Grammarly is the most widely adopted AI writing assistant, with over 40 million daily users, offering real-time grammar, spelling, clarity, and tone suggestions across browsers, Word, Google Docs, email, and more. It polishes writing without copy-pasting. Its paraphrasing and generation features are secondary to its core grammar and clarity strengths.
Opus Clip
Opus Clip uses AI to analyze long-form video content and extract the most engaging moments as short clips sized for TikTok, Reels, and Shorts. Creators, marketers, and podcasters use it to repurpose existing content without manual editing. The AI scoring system ranks clips by predicted virality, which is a useful starting point, though its judgment does not always align with your specific audience.
if you need ai writing. Starts at 12/mo.
if you need video editing and ai writing. It has a usable free tier to start with.
- +Processes long videos quickly and outputs multiple clip options in one run
- +Auto-generates captions with word-level highlighting baked in
- +Virality score gives a fast triage signal across many clips
Which to choose
Grammarly and Opus Clip both cover ai writing, so this is a real either-or for some teams. The right pick depends on which one's wider feature set and pricing fit how you work.
Read the full reviews for Grammarly and Opus Clip.
Pricing checked 3 Jun 2026.