Undetectable.ai is, at its core, a bypass humanizer. Its main job is rewriting AI text so detectors are less likely to flag it, with a detector feature added alongside. TextSight is the opposite product. The headline is a real AI detector that shows you sentence-level evidence on every scan, and the rewriter that comes with it is there to improve clarity and restore a natural voice, not to evade detection. If you want to know exactly which lines read as AI and then fix the writing honestly, this is the alternative built for that. Pro is a flat 19.99 monthly (14.99 on annual), the rewriter is bundled, and the free tier is real: 3 scans a day, no card, no signup. We are not a bypass tool and we will not pretend to be one.
Undetectable.ai does one thing competently: it rewrites AI text to be harder for detectors to flag. That is a bypass product. The reason an alternative search exists is that a lot of people do not actually want bypass. They want to know what reads as AI and then fix the writing. Here are the four gaps that push them to look.
Undetectable.ai is built to make AI text harder to detect. Its detector exists mostly to check its own bypass output. If your actual job is the opposite, finding out which sentences read as AI so you can address them, you need a detector as the headline product, not a bonus tab. TextSight is detection-first. Every scan returns a document score and sentence-level highlights, so you start from evidence rather than from an assumption that everything should be run through a bypass pass.
Detector models are updated regularly. A rewrite that slips past one today is not guaranteed to slip past its next version. A bypass-first product is in a continuous race with detector vendors, and every subscriber pays for that race. The practical cost is rework when content that cleared last quarter starts getting flagged. TextSight does not sell a moving bypass target. It gives you an accurate read and a rewriter that improves clarity, which holds up better over time.
"Undetectable" is a hard word to put on a client invoice, a grant application, or an academic submission. Freelancers whose clients ask about content provenance, applicants whose funders ask AI-use questions, and students under institutional AI policies all find evasion framing risky. TextSight is positioned around honesty: a detector that shows evidence, and a rewriter meant to improve writing and restore a natural voice. Many users start with their own work that a detector wrongly flagged, then revise the specific lines. That story is defensible. A bypass story usually is not.
A bypass tool hands you a rewrite and a claim. It does not show you which sentences a real detector would still flag or why. TextSight ships the detector and the rewriter in one product, so you can scan, see the flagged sentences with a short rationale per line, revise just those, and re-scan to confirm the writing reads more naturally. One subscription, one workflow, and the detector is the source of truth instead of a black box.
If you specifically want a bypass humanizer, Undetectable.ai is the tool that does that, and it is on most brand allowlists for exactly that reason. If you would rather detect honestly and fix the writing, keep reading.
A short table first. The narrative below is honest about where Undetectable.ai is still the better call, because if you genuinely want a bypass humanizer, it is.
| Feature | TextSight | Undetectable.ai |
|---|---|---|
| Core purpose | Detection-first: find what reads as AI | Bypass-first: make AI text harder to detect |
| Detector role | Headline product, standalone classifier | Secondary feature alongside the humanizer |
| Sentence-level evidence | Yes, colour-coded with per-line rationale | Not the focus; output is the rewrite |
| Rewriter goal | Improve clarity, restore natural voice | Reduce the chance a detector flags the text |
| Rewriter modes | 3 modes (Light, Standard, Maximum) | Multiple aggression levels, bypass-oriented |
| Free tier (no card) | 3 scans/day, 5,000 chars, no signup | Limited free use, then paid |
| Pricing model | Flat per-user subscription | Subscription tied to a monthly word budget |
| Pro price | $19.99/mo flat ($14.99 annual) | See vendor pricing page |
| ESL handling | Detector calibrated on non-native English samples | Bypass tool, not positioned as an ESL-safe detector |
| REST API | Business tier, $39.99/mo | Yes, paid tier |
| Chrome extension | Yes, free on all tiers | Yes |
| Brand recognition | Newer, growing | Established humanizer brand |
| Best fit | Anyone who wants to detect honestly and fix the writing | Anyone who specifically wants to bypass detection |
Verify pricing on each tool's own page before subscribing. "Win" markers reflect our reading of the positioning gap, not a third-party audit.
It is tempting to ask "which is more accurate", but that question assumes both tools are detectors competing on the same axis. They are not. Undetectable.ai is a bypass humanizer. TextSight is a detector. The right question is which job you actually need done.
You have AI-generated text and you want a detector to be less likely to flag it. Undetectable.ai rewrites the text toward that goal and reports on its own output. That is a clear, well-known job, and Undetectable.ai is a recognised brand for it. The honest caveat is the one its own users run into: detector models keep changing, so the result is a moving target rather than a permanent state.
You have a draft, yours or someone else's, and you want to know which parts read as AI and why, so you can make a decision or improve the writing. TextSight scores the document, highlights the specific sentences, and gives a short rationale per line. From there you can revise by hand or use the bundled rewriter to improve clarity, then re-scan. The detector is the source of truth the whole way through.
We are not going to put up a benchmark table that pits a detector against a bypass tool, because the comparison would be misleading and the numbers would have to be invented. When we publish detector accuracy figures, they come from a measured study on a real corpus, not a marketing estimate. Until that is published, this page sticks to positioning we can stand behind: TextSight is detection-first, with sentence-level evidence and a clarity rewriter, and Undetectable.ai is a bypass humanizer. Different jobs.
TextSight Pro is 19.99 monthly or 14.99 on annual billing for effectively unlimited detector scans plus 50,000 rewriter words a month. Undetectable.ai is sold as a humanizer subscription tied to a monthly word budget; check their pricing page for current numbers. The difference that matters is structural: with TextSight the detector and the rewriter are the same product, so you are not stacking a separate detector subscription to verify your work.
Billed $89.88/year, save $30
Billed $179.88/year, save $60
Billed $359.88/year, save $120
Yearly billing saves 25%. Undetectable.ai prices its humanizer by monthly word budget, so confirm the current tier on their site before comparing. View full pricing
The workflow part is paste-paste. The real shift is in what you are aiming for: not making text harder to detect, but understanding what reads as AI and improving the writing. You are working with the detector, not against it.
Take a draft you care about. Paste it into TextSight on the free tier. No card, no email, no signup. Read the document score, then look at the per-sentence highlights. The lines that light up are the ones a detector reads as AI, with a short rationale for each. This is the evidence a bypass tool never shows you, because its job is to hide the text, not explain it.
Rather than running everything through an aggressive pass, fix the specific sentences the detector flagged. Revise them by hand, or use the rewriter on the lightest mode that reads naturally. Light cleans cadence while preserving voice, Standard restructures sentence shape, and Maximum is there for heavier rewrites. Your voice stays consistent and you only touch what needs touching.
If you had been pairing a bypass tool with a separate detector to check your work, TextSight covers both jobs in one subscription. For teams, the Business REST API at 39.99 monthly (29.99 on annual) bundles detection, the rewriter, and bulk scanning behind a single key. Most of the switch is done in an hour.
Keep Undetectable.ai if you specifically want a bypass humanizer for low-stakes content. The two tools do different jobs, and you can run both. Most people who came looking for honest detection find they only need TextSight.
TextSight is not the only Undetectable.ai alternative worth considering. Here is where each of the other serious options actually wins, and where TextSight is still the better pick for the combination of a real detector plus an ethical AI rewriter at flat-rate pricing.
GPTZero ships a generous free tier and was built around academic-integrity framing. It is the lowest-friction starting point for a teacher or graduate student who needs a quick second opinion. It is not a one-to-one Undetectable.ai swap because GPTZero does not ship an AI rewriter; pair it with a separate writing tool if you need rewrite capability. Where GPTZero loses to TextSight is on the all-in workflow: you still need a second product for authenticity, and GPTZero's free tier does not include the calibrated Light/Standard/Maximum mode control TextSight gives you. See our TextSight vs GPTZero page for the head-to-head.
Originality.ai is the SEO-agency default with a strong commercial detector and a credit-meter rewriter, mature freelancer brief templates, and audit posture content teams trust. Where it loses to TextSight as an Undetectable.ai alternative is on the credit meter (cost stacks at higher volume), on the absence of a real free tier, and on ESL calibration. For SEO publishers with steady scan volume, Originality is the better fit; for everyone looking for an Undetectable.ai alternative who wants a real free tier and flat-rate pricing, TextSight is the lighter pick. See our Originality.ai alternative page for that comparison.
Copyleaks is the institutional AI + plagiarism detector for universities, large publishers, and procurement-driven buyers. SSO, LMS integration, and source-matching at scale are real strengths. Copyleaks is overkill for a solo writer or small agency replacing Undetectable.ai, and the credit meter creates the same volume anxiety the Undetectable word ladder does. For institutional buyers it is the right tool; for everyone else, TextSight is lighter. See our Copyleaks alternative page for that breakdown.
Across this comparison set, no other Undetectable.ai alternative ships a real detector plus a clarity rewriter with three intensity modes at flat-rate pricing in one product. Each of the other tools wins on a single axis (free, commercial, institutional). TextSight is the pick when you want honest detection rather than evasion, when defensible scope is part of the deliverable, and when you would rather pay one flat subscription than stack a rewriter and a detector.
Both products serve real users. The honest answer is workflow-specific. Use this picker to find the tool that fits the work you actually do, and the framing your clients and reviewers will accept.
The deeper head-to-head: feature table, where Undetectable wins, where TextSight wins, and migration steps.
Read the compareThree intensity modes (Light, Standard, Maximum) with sentence-level diff and re-scan verification.
Open the AI rewriterIf you are also comparing Winston AI, here is the ESL-safe detector alternative with sentence-level evidence.
Read the guideFull tier breakdown for Free, Starter, Pro, and Business. Annual billing saves 25%.
See pricingStart with TextSight's free tier. No card, no signup, no commitment. The honest Undetectable.ai alternative for client-safe work.