Virality score tools compared: what each one actually does

Published August 2026

Most virality score tools upload your video to their servers, require an account, and charge monthly. This page compares seven of them — PreViral, Quso.ai, GoViral, Virality Predictor, Klap, ReelRise and ReelTok — on platform, upload, account, timing, output and price. Facts checked 28 August 2026 against each vendor's own pages.

Every tool below claims to tell you something useful about a short-form video before you publish it. They differ enormously in what you have to hand over to get that answer. This page compares seven of them on the things that actually change your decision: where the tool runs, whether your file leaves your device, whether you need an account, whether it looks at a draft or a published post, what it hands back, and what it costs.

Every fact here was read on a first-party page — a vendor site, a privacy policy, a help centre, or an App Store or Google Play listing — on 28 August 2026. Source URLs are listed at the end. Where a vendor publishes nothing on a point, this page says "not published" rather than guessing.

What to check before you trust a virality score

Six questions separate these tools, and the answers usually sit in a privacy policy rather than on the pricing page.

Does your video file leave your device? Most of these tools are cloud-based by design, and several name the third parties your footage gets forwarded to.
Is an account required? One returns a result without one. Most route every button to a signup page.
Does it score a draft or a published post? Pre-post scoring and after-the-fact analytics answer different questions, and some products do both.
Does it score your video, or clips it cut out of a longer one you supplied? Two of the tools here are repurposing suites first and scorers second.
What is the actual scale? A 0-100 score and a 75-99 score are not comparable numbers.
Is an accuracy rate published, and is there a methodology behind it? Usually the answer is no — and the more honest vendors say so out loud.

The tools, one by one

Listed alphabetically. ReelTok, this site's own app, sits in the list on the same terms as everything else, with its limitations stated.

GoViral (Go Viral: AI Creator Toolkit)

An iOS app that scores your hook and predicts viral potential before you post. It is the only tool here that publishes a headline accuracy figure, and the one whose own pages disagree with each other most.

Platform: iOS only — iPhone and iPad on iOS 17 or later, plus Mac with M1 or later and Apple Vision. No web app, Android app, extension or API.
Upload: yes. The privacy policy says the analysis uses "secure cloud services for AI processing" and that uploaded videos are "processed temporarily and not stored permanently." No on-device claim is made anywhere.
Account: not published. Neither the site nor the App Store listing states whether a signup or email is needed to get a result.
Timing: pre-post. The homepage flow is upload your video, get AI analysis, post.
Returns: a Hook Score 0-100 for the first three seconds, a viral prediction percentage, a second-by-second engagement heat map, a view forecast, hashtags, captions and posting times, plus script, hook, hashtag and idea generators.
Price: the App Store lists two in-app purchases — "Premium Yearly $9.99" and "Premium Weekly $29.99" — where the labels and amounts read as transposed. The marketing site's FAQ instead says $9.99/month and $29.99/year. Neither matches the other. No free tier or trial is stated anywhere.
Accuracy: "89% prediction accuracy for viral content, validated by analysis of 2.3M TikTok videos." No methodology, definition of viral, measurement window or source is published. Per-band figures on the same page contradict each other — 80-89 is given both as a 78% success rate and as a 67% chance of 100K+ views — and the Terms of Use say results cannot be guaranteed.
Also worth knowing: the marketing site is branded "Go Viral: AI Creator Toolkit", is TikTok-only, is dated 2025 throughout, and names Any Mind LLC as operator. The App Store listing it links to is published as "Go Viral With AI: Viral AI" by Monadly (Hangzhou Monadly Technology Co., Ltd.), rated 4.7 from 320 ratings, and covers Reels and Shorts as well.

Klap

A repurposing tool. You give it a long video and it returns short vertical clips ranked by score, so the thing being scored is a clip Klap cut — not a finished video you made elsewhere and are about to post.

Platform: browser web app plus a REST API. No iOS app, Android app or browser extension is offered or linked from the site.
Upload: yes. A file up to four hours (MP4, MOV, AVI, MKV, WMV, FLV) or a URL from YouTube, Vimeo, Twitch, Google Drive, Facebook, Dailymotion, Zoom, Loom or Riverside. There is no local-only path. Klap says its Whisper and Idefics models run on its own infrastructure with no retention, but transcripts are sent to OpenAI to curate the shorts.
Account: yes — Google sign-in or email and password. No credit card for the free video.
Timing: pre-post for the clips it generated, plus a post-publish side. Analytics is included in all three paid tiers, and clips can be scheduled to TikTok, Instagram, YouTube and LinkedIn.
Returns: 10 or more 9:16 clips with animated captions, speaker tracking and an editable transcript, each carrying a 0-100 Virality Score. Klap's own advice is to post the 90+ clips first and skip the rest.
Price: Basic $14/mo, Pro $39/mo, Pro+ $94/mo, all shown billed yearly behind a "Save 50%" toggle, so the monthly rates are roughly double. There is no free plan — the free offer is one video, no card, and no watermark. The homepage FAQ names a "Klap Pro" at $29/month, contradicting the pricing page.
Accuracy: not published. There is a "See how scoring works" link but no page behind it explaining the score. The only accuracy figure on the site — 98% — is about caption transcription, not prediction.
Operator: ZIGG, a SAS registered in France, doing business as Klap.

PreViral

Two separate products. Score rates a video idea you type out before you film it. Analysis rates a finished cut before you upload it. PreViral is also the only tool here that publishes a prediction ledger and refuses to quote an accuracy rate until it has the sample to support one.

Platform: browser web app only. No iOS app, Android app, extension or public API is mentioned anywhere on the site.
Upload: depends on the product. Score needs no file — you type a description of the idea before filming. Analysis uploads the finished cut (Short up to 90 seconds, Long up to 30 minutes) to their servers, and the privacy policy routes video to Twelve Labs and Google Gemini as subprocessors. No on-device or local-processing claim is made.
Account: yes. Every entry point routes to a signup page, and the privacy policy lists name and email collected to create an account. There is no anonymous result path.
Timing: pre-post on both products, positioned explicitly against after-the-fact platform analytics.
Returns: Score gives a 0-100 number with word labels from NEEDS WORK to EXCELLENT, a breakdown across 10 named frameworks, a fix list and a projected outcome. Analysis gives a 0-100 score with timestamped feedback pointing at specific moments in the video.
Price: Free $0, Lite $9/mo, Pro $29/mo, Growth $59/mo. Annual billing is advertised at 17% off, but the yearly dollar figures are not shown. The free tier is permanent rather than a trial: 3 Score predictions plus 1 Short or Long Analysis each month, no card required.
Accuracy: none published, deliberately. The track-record page states that no accuracy number gets quoted before the sample carries it, and the ledger showed "0 of 50 live v2 outcomes measured so far." Their stated method records outcomes at 7 and 30 days as a multiplier against a channel's own recent median — so success means outperforming your own baseline, not going viral. The process is described in detail but not independently audited.

Quso.ai (formerly vidyo.ai)

A repurposing suite that cuts long videos, podcasts and streams into captioned vertical clips, ranks those clips, and schedules them out to social platforms. The Virality Score is one feature inside a much larger product.

Platform: browser web app — the editor runs entirely online with nothing to install. The quso.ai App Store developer account lists one iOS app, "CC Captions & Subtitles", which is a captions app rather than the full platform. No extension or public API is mentioned on any first-party page.
Upload: yes, upload-first. A file, or an import from YouTube, Vimeo, X, Facebook, Twitch, Rumble, Loom, LinkedIn, Zoom, Google Drive or Dropbox. The privacy policy confirms the uploaded video reaches their infrastructure and is passed to AI models, and names Google Cloud Platform, Amazon Web Services and Firebase among recipients. No on-device claim.
Account: yes for the main app — free, no credit card. A handful of standalone free tools advertise single-video use without signup.
Timing: both, on different products. The Virality Score is framed as pre-post. A separate Social Media Analytics product covers published posts across Facebook, Instagram, TikTok, Pinterest, LinkedIn and X.
Returns: clips first. IntelliClips cuts a long source video into short captioned clips and attaches a rating to each. The scale runs 75 to 99, banded from average to exceptional, across four categories — Trends, Hook and Flow, Engagement, and Shareability. Because the floor is 75, the score ranks clips against each other rather than rating them against zero. No per-category weighting is published.
Price: Free $0/mo (75 credits, 720p exports, seven-day data retention), Lite $29/mo, Essential $39/mo, Growth $49/mo, all cheaper billed yearly. Plans are metered in monthly credits, and what one credit actually buys is not published.
Accuracy: not published. The help centre states plainly that the virality score is a prediction based on content analysis, not a guarantee.

ReelRise

Mobile apps for iPhone and Android that score a draft, rank the fixes by impact and effort, and can also audit a connected TikTok or Instagram profile.

Platform: iPhone and Android native apps. reelrise.app is a marketing site — there is no web app, extension or API that analyses video.
Upload: yes — a video up to five minutes, or a carousel. The privacy policy says content is sent to third-party AI providers, processed, and returned as analysis, naming Google (Gemini), Anthropic (Claude), OpenAI and Alibaba Cloud (Qwen). No on-device claim is made. The Google Play Data safety panel separately declares "No data shared with third parties," which sits awkwardly against that list.
Account: an in-app account exists — credits are tied to it, the weekly allowance cycle is anchored to a signup date, and there is a documented in-app deletion flow — but no page states whether an email or password is required to create it.
Timing: both. The draft score is pre-post; the TikTok and Instagram Account Audits work from stats the platform reports for content you already published.
Returns: an overall 0-100 virality score, a separate 0-100 safety score across policy categories, and a ranked list of fixes each tagged with impact and effort plus step-by-step instructions.
Price: free to download, but the Terms state that using the features requires a paid subscription. iOS in-app purchases listed: Annual Access with 3-Day Free Trial $29.99, Monthly Access $9.99, Monthly Max Plan $29.99, Pro Access for One Month $12.99, and credit packs at $5.99 and $14.99. Google Play publishes only a $5.99-$29.99 per-item range. The 3-day trial is attached to the annual tier; the Terms say only some subscriptions include one.
Accuracy: not published. The Play listing says the AI analyses 30+ factors to predict views, likes, shares and comments; the Terms explicitly disclaim any guarantee that a video will gain views, perform well, or go viral.
Operator: ReelRise LLC, Sharjah Media City, UAE. Google Play shows 10,000+ downloads and 4.6 stars; the App Store shows 4.7 from 1.1K ratings.

ReelTok

This site's own app. An iOS app that scores a video on the phone before you post it. Its main constraint is narrow platform support — it is iPhone-only, on a recent OS, with no web version to fall back on.

Platform: iOS only, and it requires iOS 26. No web app, no Android app, no browser extension, no API. If you edit on a desktop or shoot on Android, it is not usable at all.
Upload: no. Analysis runs on the device and the video file is never uploaded. Several tools in this list make privacy assurances of their own, so treat this as a difference in architecture rather than a unique property — the checkable part is that no file transfer is involved.
Account: none. No email, no signup and no password are required to get a result.
Timing: pre-post only. It scores a draft before you publish and does not read your published analytics, so it cannot tell you why something that already went out underperformed.
Returns: a 0-100 virality score, predicted reach, hook suggestions, a caption fixer, video ideas, and the Surge AI coach.
Price: free to download, with an optional auto-renewing subscription billed through Apple. The App Store listing shows tiers at $7.99/week, $19.99/month, $39.99/year and $59.99/year. There is no free trial.
Accuracy: not published. The score is presented as a directional estimate, not a prediction the platform is bound by.

Virality Predictor

A browser tool with a neuromarketing frame: it scores a short draft's hook and attention curve, and names its sub-metrics after brain regions. The homepage labels the tool beta.

Platform: browser web app, sign-in via Google OAuth. Available in English, Italian and Japanese. No iOS app, Android app or API is offered or mentioned.
Upload: yes, and forwarded onward — the privacy policy says uploaded videos are sent to Replicate's API to run the analysis, on Cloudflare infrastructure. The limits are tight: MP4, WebM or MOV, up to 100 MB and a maximum of 20 seconds, or paste a TikTok or Reels draft link.
Account: the site contradicts itself. The homepage says "No sign-up required to start," while the free plan grants credits only on sign-up and the Terms of Service require account registration via Google OAuth and an age of 18 or over.
Timing: pre-post. It scores a draft before it goes live and does not read your account analytics or published-video performance.
Returns: a 0-100 Viral Potential score plus named sub-metrics — Hook Score, Hold Rate, Visual Cortex, Attention Control, Auditory Cortex, Focus Drift, Language Network and Duration — a second-by-second attention timeline, flagged focus-drift timestamps, and prescriptive fixes banded by score.
Price: Starter $9.9/month, Pro $29.9/month, Premium $99.9/month, metered at 5 credits per prediction — Starter's 500 credits a month is about 100 predictions. The same credits also pay for AI video generation, so scoring and generating compete for one budget. The free tier is 10 credits on sign-up, which is two predictions, and their own pricing FAQ calls it a hands-on trial rather than an ongoing plan.
Privacy: their two pages disagree. The homepage FAQ says uploads are automatically purged from their servers once the engagement score is generated; the privacy policy says they collect and store the videos you upload, kept until you delete them from the dashboard.
Accuracy: not published. The strongest claim is a model "trained on massive datasets of human neural responses" with no dataset, sample size, validation method or benchmark given — and the pricing FAQ then tells you to treat the output as a directional signal, not a guaranteed performance forecast.

Does your video get uploaded?

Five of the seven take your video file. PreViral's Score product avoids it by scoring a typed description rather than footage, and ReelTok avoids it by running on the phone. Everything else — Quso.ai, GoViral, Klap, ReelRise, Virality Predictor and PreViral's separate Analysis product — uploads the file to a server.

The more useful detail is where it goes next, and most vendors do publish this. PreViral routes video to Twelve Labs and Google Gemini. Virality Predictor sends it to Replicate. ReelRise names Google, Anthropic, OpenAI and Alibaba Cloud. Quso.ai names Google Cloud, AWS and Firebase among recipients. Klap keeps video on its own infrastructure but sends transcripts to OpenAI. GoViral says only "secure cloud services" and names nobody.

Read the privacy policy rather than the marketing line above it. Two vendors here publish deletion claims that their own policies contradict: Virality Predictor's homepage says uploads are purged after scoring while its policy says they are stored until you delete them, and PreViral's Analysis page says footage is never stored while its policy documents third-party routing. None of these vendor assertions is checkable from outside, including the ones that are internally consistent.

Can a tool actually predict a viral video?

On the published evidence, no — and most of these vendors say so themselves. Six of the seven publish no accuracy figure at all. Quso.ai's help centre calls the score a prediction rather than a guarantee. Virality Predictor's pricing FAQ calls it a directional signal. ReelRise's Terms disclaim any promise of views. PreViral withholds a number on purpose while it accumulates a sample, and its ledger showed zero of fifty outcomes measured at the time of checking.

GoViral is the exception, and it is the wrong kind of exception. It publishes 89% accuracy in its hero, its FAQ, its meta description and its structured data, with no methodology, no definition of viral, no measurement window and no source — then its own Terms of Use say outcomes cannot be guaranteed. Treat any unexplained accuracy percentage as marketing copy until someone shows the working.

The honest way to read all seven scores is as a structural check, not a forecast. They can flag a slow opening, a dead first frame, a clip that sags in the middle. None of them knows what real viewers will do once you post.

Which one fits which situation?

There is no winner here. These tools do different jobs, and the constraint that decides it is usually yours rather than theirs.

You have a long video and want clips out of it: Klap and Quso.ai are built for exactly that. The rest are not.
You want to test an idea before you film: PreViral's Score is the only product here that rates a written idea rather than footage.
You work on desktop or Android: that rules out ReelTok and GoViral entirely. ReelRise covers Android; the four browser tools run anywhere.
You want to avoid creating an account: ReelTok requires none. Virality Predictor's own pages contradict each other about this. PreViral, Quso.ai and Klap all require one; GoViral does not say.
You want to avoid uploading the file: ReelTok runs on the device, and PreViral's Score never asks for a file. Every other path here uploads.
You want to spend nothing ongoing: PreViral and Quso.ai publish genuine free tiers. Klap gives one video, Virality Predictor gives two predictions. GoViral and ReelTok have no free tier, and ReelRise's 3-day trial is attached to its annual plan.

Checked 28 August 2026 against the vendor pages listed below. Prices and features on all seven change without notice, and three of these vendors already publish figures that contradict their own other pages. Verify anything that would change your decision. If a fact here is wrong or has moved, send the URL and it gets corrected.

Facts checked 28 August 2026. Every price and feature claim on this page was read from the vendor’s own live pages on that date, and products change without notice. ReelTok is made by Viral App Labs, who publish this page — it is listed here as one option among several, not as the recommendation. If something about your product is wrong or out of date, email us and we will correct it.

Know your score before you post

ReelTok's AI analyzes your video on your iPhone — a 0–100 virality score, predicted reach, hooks, and fixes before you share.

Frequently asked questions

Which virality score tools don't upload your video?

Two of the seven avoid it. ReelTok analyses the video on the iPhone itself, so the file is never uploaded. PreViral's Score product scores a typed description of an idea rather than footage, so no file is involved — though its separate Analysis product does upload the finished cut. Quso.ai, GoViral, Klap, ReelRise and Virality Predictor all upload.

Is there a free virality score tool?

PreViral and Quso.ai publish genuine free tiers — 3 Score predictions plus 1 Analysis a month, and 75 credits a month with 720p exports respectively, both with no card. Klap gives one free video, and Virality Predictor gives 10 credits, which is two predictions. GoViral and ReelTok have no free tier, and ReelRise's 3-day trial is attached to its annual plan.

Do any of these tools publish an accuracy rate?

Only GoViral, which claims 89% prediction accuracy across its site with no methodology, no definition of viral and no source — and contradicts itself on its own score-band figures. The other six publish nothing. PreViral withholds a number deliberately until its ledger has measured enough outcomes; at the time of checking it showed zero of fifty measured.

What is the difference between a virality score and a clip ranking?

A virality score rates a video you made. A clip ranking rates segments a tool cut out of a longer video you handed it. Klap and Quso.ai do the second: their scores decide which of their generated clips you post first. Quso.ai's scale starts at 75, so it ranks clips against each other rather than rating them against zero.

Is there a virality score tool for Android?

ReelRise publishes an Android app on Google Play. GoViral and ReelTok are iOS only, and ReelTok additionally requires iOS 26. PreViral, Quso.ai, Klap and Virality Predictor are browser-based, so they run in a mobile browser on any device — but all four upload your video to their servers to do it.

Can these tools tell me why a video I already posted flopped?

Mostly no. PreViral, GoViral, Virality Predictor and ReelTok are pre-post only: they score a draft and never read your published analytics. Quso.ai has a separate Social Media Analytics product for published posts, ReelRise runs TikTok and Instagram account audits, and Klap includes analytics in its paid tiers. For one flopped video, your own retention graph in the platform's studio is still the ground truth.

How were these facts checked, and what if one is wrong?

Every line was read on 28 August 2026 on a first-party page — a vendor site, privacy policy, help centre, or App Store or Google Play listing — and each source URL is listed on this page. Nothing was taken from third-party directories or review sites. Where a vendor publishes nothing on a point, this page says so rather than guessing. If a fact has changed, send the URL and it gets corrected.

Sources

Every factual claim above was read from one of these first-party pages on 28 August 2026. Vendor pages change without notice — if one of these no longer says what this page reports, the page is wrong and we want to know.

More comparisons: Do virality scores actually work?, and Free TikTok virality checkers: what's actually free.