The quick answer
To compare Instagram posts by engagement, sort posts by the metric that matters, then normalize the read by format, date, caption, CTA, and source link. Likes alone can be noisy. Comments, views, saves, and the post format can change the story.
The mistake gets worse the moment you compare across accounts instead of within one account's own grid. A follower count ten or a hundred times larger will produce like counts ten or a hundred times larger almost by default, so ranking two competitors by raw likes mostly just ranks them by audience size, a fact you already knew before opening either profile. The number that survives a size mismatch is a ratio, not a raw count: comments per like, or engagement broken out by post type, because a ratio cancels out most of the scale difference and leaves the part that is actually about the content.
The headline is not "this post got likes." The headline is "this format plus this hook made the audience do something visible."
Step-by-step
- Pick one primary metric. Use likes for broad appeal, comments for conversation, and views for video reach.
- Sort the public posts. Put the strongest posts at the top, but keep their dates and formats visible.
- Group by format. Compare carousel to carousel, reel to reel, and image to image before making cross-format claims.
- Read the first line. The first line often explains the click, save, or comment impulse.
- Mark the CTA. A soft/no CTA winner teaches a different lesson than a post that says "shop now" or "comment below."
- Open comments. Look for repeated questions, objections, praise, confusion, and user language.
- Check the source link. Do not use a screenshot-only example as the source of truth.
- Compare the nearest weaker posts. Ask what the winner had that the weaker post did not.
What to inspect before calling a post a winner
| Signal | Question to ask | What it can reveal |
|---|---|---|
| Format | Was this a reel, carousel, or single image? | The creative container may be doing more work than the caption. |
| Caption hook | What is the exact first line? | The audience promise, tension, or proof angle. |
| CTA | Did the post ask for a direct action? | Whether urgency or pure interest drove engagement. |
| Comments | What are people actually saying? | Demand, confusion, objections, and language to reuse. |
| Posting date | Was the post tied to a launch, season, or news moment? | Whether timing made the result hard to repeat. |
A real comparison: adidas vs. Glossier
Run 20 recent posts from each brand's public Instagram grid and the raw numbers look like a blowout. @adidas averages 486,951 likes and 2,640 comments per post; @glossier averages 5,252 likes and 86 comments. By raw likes, adidas is ahead of Glossier by roughly 93 times, which tells you almost nothing on its own, because adidas has a vastly larger public following and a global sports-content operation. Comparing the two brands on raw likes is really just comparing follower counts with extra steps.
| Metric (20-post public sample) | @adidas | @glossier |
|---|---|---|
| Average likes per post | 486,951 | 5,252 |
| Average comments per post | 2,640 | 86 |
| Comments-to-likes ratio | 0.54% | 1.64% |
| Format mix in the sample | 18 carousel, 2 video | 13 carousel, 4 image, 3 video |
The comments-to-likes ratio tells a different story than the raw counts do. Adidas converts likes to comments at 0.54%. Glossier converts at 1.64%, roughly three times higher. Neither brand is "better" from this alone, but the ratio reveals something the raw numbers hide: relative to its own audience size, Glossier's grid is pulling a noticeably more talkative audience per like than adidas's. That is a useful, specific fact for a creative or community team to act on. It says the comment prompts and community tone are working proportionally, not that the account needs bigger reach before comments start to matter.
How InstaSeer helps
InstaSeer gives you a structured public post list with captions, dates, formats, engagement fields, and source links. Sort the loaded posts, open the strongest post, then inspect nearby weaker posts before writing the pattern.
When you need a cleaner read, use compare mode to put two public handles side by side and review which account wins on cadence, format mix, and top post proof.
InstaSeer comparison read
| Step | Report area | Decision rule |
|---|---|---|
| Start with highest public signal | Best post card and post list. | Treat it as the first example to inspect, not the final answer. |
| Filter by format | List, detail, and grid views with type filters. | Compare reels to reels before mixing formats. |
| Open the source | Open source button. | Verify comments, creative context, and caption framing. |
| Compare lower-signal posts | Worst post and nearby post cards. | Look for the difference that might be repeatable. |
The takeaway
Do not ask, "Which post won?" Ask, "What did the winning post prove that the weaker posts did not?" That is the useful part.
FAQ
What engagement metric should I use first?
Start with the metric that maps to your goal: views for reach, likes for broad appeal, comments for conversation, and clicks or conversions if you have owned data.
Should reels and carousels be compared together?
Only after you first compare within format. Format affects reach, behavior, and how people read the caption.