What Retensis does
Retensis is an AI agent that watches your videos and scores why they win or lose: upload a file or paste a YouTube link and get a result in about 90 seconds. Free gets you 2 analyses a month with an overall grade, 5 category scores, and a predicted retention curve. Basic ($9.99/mo) unlocks 30 analyses a month with full per-category feedback, drop-off point identification, an audio-visual sync check, and voice and delivery coaching. Pro ($14.99/mo, its most popular tier) goes unlimited and adds a full content-strategy suite on top: an AI Video Player for scrubbing your footage with AI notes, plus Hook Writer, Title Lab, Script Coach, Creator Research, Topic Opportunities, and Trend Finder. Team ($34.99/mo) adds seats and a shared workspace for agencies.
What is not described anywhere in Retensis' own pricing or feature pages: any connection to your real Instagram account. Its retention curve is explicitly a prediction, with no visible path to correlate that prediction against what actually happened on your account.
What Reelyze does
Reelyze runs the same frame-by-frame engine, hook strength, pacing, on-screen text, audio-visual alignment, and a predicted retention curve, whether you upload a draft before publishing or paste a live Reel, TikTok, or Short URL afterward. On top of that, Reelyze's drop-off explainer (Pro) lets you paste a screenshot of your actual Instagram retention graph, correlating the diagnosis with what genuinely happened on that video rather than only a prediction, an optional step, not automatic on every analysis. Instagram Insights, a separate feature, syncs your account's own posting history for pattern-level coaching.
Reelyze also includes free no-sign-up tools (transcript, downloader, MP3 extractor, engagement calculators, and hook, caption, and hashtag generators) that work standalone, whether or not you ever run a full analysis.
The core difference: price and toolkit vs. real-data grounding
Both tools watch the actual footage and predict retention; that much is no longer a real point of difference. What is: Retensis costs less at every comparable tier and, at Pro, bundles a broad built-in content-strategy suite (trend research, title testing, script coaching) that Reelyze does not match feature-for-feature at the same price. Reelyze's real edge is the option to ground a diagnosis in your actual Instagram data, via Instagram Insights or the drop-off explainer, which is not a feature Retensis' own site describes having. If price and built-in content tooling matter most, that favors Retensis. If you want the option of a real-data-grounded diagnosis and you are fine paying more for it, that favors Reelyze.
Feature comparison
| Reelyze | Retensis | |
|---|---|---|
| Input | Upload a draft, or paste a Reel/TikTok/YouTube Shorts URL | Upload a video, or paste a YouTube link |
| Watches the actual footage | Yes | Yes |
| Real-retention-graph correlation | Optional (Pro): paste your Instagram retention graph screenshot, get the diagnosis correlated to it | Not described anywhere in its pricing or feature pages, prediction-only |
| Rewrite suggestions | Prescriptive fixes from the frame-by-frame diagnosis | AI rewrite suggestions for hook and script |
| Competitor analysis | Analyze any public short by URL | Not described as a feature |
| Built-in content-strategy tools | Content Studio (hooks and scripts); hook, caption, and hashtag generators as separate free tools | Hook Writer, Title Lab, Script Coach, Creator Research, Topic Opportunities, Trend Finder, Creative DNA and Viral Planner, AI Video Player, all bundled into Pro |
| Extra free tools | Transcript, downloader, MP3 extractor, engagement calculators, no sign-up | Not offered |
| Free tier | 1 analysis, one-time, no card | 2 analyses a month, ongoing, no card |
| Paid plans | Creator $19/mo (20 analyses), Pro $49/mo (60 analyses + competitor tracking), Studio $149/mo (200 analyses + API) | Basic $9.99/mo (30 analyses), Pro $14.99/mo (unlimited + content tools), Team $34.99/mo (3 seats, agency) |
Looking for a Retensis alternative?
If you came here comparing Retensis alternatives, know that the two tools are closer than the marketing on either side might suggest: both watch real footage and both predict retention. Reelyze is worth a look specifically if you want the option to correlate that prediction with your actual Instagram retention data (via Instagram Insights or the drop-off explainer), or if you would rather have downloader, transcript, and MP3 utilities bundled in for free alongside the analysis. If what you actually want is the lowest price and a broad built-in content-strategy toolkit, Retensis' Pro plan is worth evaluating on its own terms; this page will not pretend otherwise.
Which should you use?
Retensis is the stronger pick on price and built-in breadth: at $14.99/mo its Pro plan is a third of Reelyze Pro's cost and bundles trend research, title testing, and script coaching directly in. Reelyze is the stronger pick if grounding the diagnosis in your real Instagram data matters to you specifically, or if you want free-standing tools (transcript, downloader, MP3, calculators) without paying for analysis at all. Neither is a strict upgrade over the other; it depends on whether price and built-in tooling or real-data grounding matters more for how you work.