Comparison
DraftFilter vs ZeroGPT
Both products detect AI-written text. Beyond that they are built for different jobs: DraftFilter is a quality gate for your own drafts — scan, see which sentences read machine-written, rewrite until the text sounds human — with a published methodology and an API pipeline. ZeroGPT is a multi-tool suite (detector, humanizer, paraphraser, plagiarism checker and more) whose advanced humanizer is provided by a third party, Undetectable AI. Here is a side-by-side of the verifiable facts.
DraftFilter and ZeroGPT, feature by feature
All ZeroGPT details below were checked on July 9, 2026 against zerogpt.com — its homepage, pricing data, terms of use, and AI-humanizer page. Sources are listed at the bottom. If you spot something out of date, email support@draftfilter.com and we will fix it.
| Aspect | ZeroGPT | DraftFilter |
|---|---|---|
| Free tier | $0 — up to 15,000 characters per detection; no batch file checks; ads shown (ad removal is a paid-plan feature). | $0 — 10,000 scan words per month at up to 15,000 characters per scan with an account; anonymous scans up to 5,000 characters with no account. No ads. |
| Paid plans | Pro $9.99/mo, Plus $19.99/mo, Max $26.99/mo (Expert $69.99/mo), discounted annual billing; metered in characters per detection plus batch-file counts. | Plus $15/mo, Pro $39/mo, Max $200/mo, discounted annual billing; metered in scan and humanize words per month. Pro and Max bundle API access. |
| Per-scan limits | 15,000 characters free; 100,000 characters on Pro and Plus; 150,000 on Max; 350,000 on Expert. Batch checks capped at 50-100 files by plan. | 15,000 characters per scan free; 50,000 on paid plans. API: 100 items per job at up to 20,000 characters per item — limits published on the rate-limits docs page. |
| Humanizer approach | Bundles a basic humanizer plus an "Advanced Humanizer provided by Undetectable AI" — a third-party service marketed on making AI text score as human across AI detectors. | Built-in rewriter for your own drafts: it reworks the sentences the detector flags and rescores the result, so you keep the version that sounds most human. A writing-quality loop, not a service for disguising AI text from other people's review. |
| API | Pay-as-you-go API business plans sold separately from consumer subscriptions; per their terms, API credits cannot be refunded. | Bundled with Pro and Max: score and rewrite jobs with batch parity, completion webhooks, bulk results retrieval, public share links, PDF reports, idempotency keys, an OpenAPI spec, and published rate limits. |
| Methodology transparency | Detection described as "DeepAnalyse" technology with a "multi-stage methodology" — a marketing description. We found no published evaluation dataset, thresholds, or error-rate reporting on the site. | Published methodology page covering how scoring works, how results are banded, and measured results on a named, labeled test split — including where the detector can be wrong. |
| Score repeatability | Not documented on their site. | The scoring pipeline has no sampling step and no randomness: scores are computed from model log-probabilities plus a fixed, versioned calibration, so rescanning the same text returns the same result until we publish a recalibration. |
| Support | support@zerogpt.com. | support@draftfilter.com. |
| Refund terms | Full refund only within 10 hours of purchase (12 hours for yearly plans); API credits are non-refundable, per their terms of use. | Billing runs through Stripe; refund requests are handled by support@draftfilter.com — our terms set no hours-long refund cutoff. |
| Ads | Free tier is ad-supported; removing ads is a paid feature. | No ads on any tier. |
The detector-plus-humanizer bundle, plainly
ZeroGPT sells both sides of the detection question. Its detector tells you whether text looks AI-written, and its humanizer rewrites text so it stops looking AI-written — with the advanced tier provided by Undetectable AI, a third-party product marketed on making AI text score as human across AI detectors. That is their published positioning, not our characterization; the source is linked below.
DraftFilter draws the line differently. The rewriter exists to make your own drafts read like a person wrote them — it reworks the specific sentences the detector flags and rescores until the text sounds human. We publish how the detector works so you can judge what a score means, and we do not market the rewriter as a way to disguise machine text from someone else's review.
Same text, same score
A detector score you might act on should not wobble between refreshes. DraftFilter's scoring pipeline contains no sampling and no randomness: a score is a deterministic function of your text and the released model configuration, computed from model log-probabilities plus a fixed calibration artifact. Rescan the same text and you get the same result; scores only move when we ship a recalibration, which the methodology page documents.
We are not making claims here about how any other tool behaves on rescans — you can test that yourself in a few minutes with both tools and a paragraph of text.
Why there is no detection-quality showdown on this page
Detection-quality numbers are only meaningful with a named dataset, a stated threshold, and an error-rate policy attached — a bare percentage in a marketing table tells you nothing about how a detector behaves on your writing. So this page makes no head-to-head detection-quality claims in either direction.
What we publish instead is our methodology: how scoring works, how results are banded, and measured results on a labeled test split, including the failure modes. Read it and hold us to it.
Sources
Every ZeroGPT claim on this page comes from the sources below, each checked on the date shown. Our own claims are verifiable in the product: the pricing page, the API docs (including published rate limits), and the methodology page.
- ZeroGPT homepage — free scan limit, product bundle, DeepAnalyse description (accessed 2026-07-09)
- ZeroGPT pricing (plan data served by dapi.zerogpt.com/api/dashboard/getPackages) (accessed 2026-07-09)
- ZeroGPT terms of use — refund windows, API credit policy (accessed 2026-07-09)
- ZeroGPT AI Humanizer — "Advanced Humanizer provided by Undetectable AI" (accessed 2026-07-09)
Try the quality-gate workflow
Paste a draft and see the sentence-level heatmap in seconds — free scans, no account required. Read the methodology first if you want to know exactly what the score means.