Bloggers are not freelance copywriters and not students. There is no Turnitin gate, no Upwork milestone. There is Google's March 2024 and 2025 helpful-content update, an AdSense revenue line that dips when traffic dips, a Substack subscriber base that pays you because the voice on the page reads human, and a Medium For You feed that quietly de-boosts AI-flagged work. Quillbot is the drafting-stage tool: a strong paraphraser, a competent grammar checker, a summarizer for research PDFs, an AI detector and an AI humanizer, bundled at $19.95 a month, or $8.33 a month billed annually. TextSight is the publish-stage tool: a dedicated detector that tracks within 5 to 10 points of what Google's quality raters and AdSense reviewers reach for, plus an AI humanizer purpose-built for calibration. This page is the honest comparison for bloggers running self-hosted WordPress, paid Substack and Ghost newsletters choosing between them, or both.
A compact feature table mapped against the publish-day workflow for a self-hosted WordPress, paid Substack or Ghost newsletter. The sections below go deeper on each row, with the parts where Quillbot is genuinely the better call called out clearly.
| Feature | TextSight | Quillbot |
|---|---|---|
| Primary product | Dedicated AI detector plus calibration humanizer | Paraphraser, grammar, summarizer, AI detector and AI humanizer suite |
| Detection type | Sentence-level highlights with per-line evidence | Document-level score, side feature on the suite |
| Free tier | 3 actions a day, no card | 100-word paraphrase limit, signup required |
| Pricing model | Tiered: Free, Starter, Pro, Business | Single Premium tier plus team add-ons |
| Entry price | $9.99/mo Starter or $7.49/mo annual | $19.95/mo Premium, $8.33/mo billed annually |
| Pro annual effective | $14.99/mo on annual Pro (100 actions a day) | $8.33/mo Premium billed annually covers the writing-suite bundle |
| Sentence-level evidence | Colour-coded per sentence with rationale per line | Not surfaced in the detector view |
| False positives on human writing | 5.85% of 1,180 human-written academic papers wrongly flagged (published benchmark) | Not measured by us |
| Second-language writers | No significant gap: 4.6% flagged vs 8.1% for native writers | Not measured by us |
| Bundled humanizer | Calibration humanizer drops AI score 58 to 71 points | AI Humanizer with four modes, not measured by us |
| REST API | Included on Business at $29.99/mo annual | No public REST API for paraphraser or detector |
| Best fit | Pre-publish AdSense and E-E-A-T scan on every post | Drafting-stage paraphrase plus grammar polish |
Prices verified 23 August 2026. Verify on each tool's pricing page before subscribing. "Win" markers reflect our reading of the feature gap, not a third-party audit.
Four things Quillbot does better than TextSight inside a blogger's drafting day. Acknowledging them is the point of writing this comparison in the first place.
Many bloggers use ChatGPT or Claude to bash out a rough section, then rewrite it line by line into their own voice. Quillbot Fluency or Creative mode is the fastest scalpel for that job: paste the AI paragraph, swap a verb here, restructure a clause there, drop the result back into the draft. Premium lists 9 built-in modes plus custom modes (the free plan has Standard and Fluency), which gives finer control than most free alternatives. TextSight ships a Paraphraser in the free tools collection, but the polish and mode coverage are not at Quillbot's level. If your drafting habit leans on AI-assist, Quillbot is the rewrite tool.
If your blogging day involves paraphrasing a press release into your voice, fixing tense slips in a fast first draft, summarizing a 30-page industry report for an explainer post and generating citations for an evergreen guide, Quillbot Premium handles all of that for $19.95 a month, or $8.33 a month billed annually. Buying these as separate subscriptions would run $20 to $40 a month across Grammarly, a standalone summarizer and a paraphraser. For a blogger assembling a drafting kit on a side-income budget, Quillbot on annual billing is the cheapest path to a competent toolset.
Quillbot ships a battle-tested Chrome extension, a Microsoft Word add-in, an Edge extension, and desktop and mobile apps. They integrate paraphrase, grammar and summarize directly inside the editing flow, which matters for bloggers whose draft never leaves the browser or Word. TextSight ships a Chrome extension with detection plus humanizer inline and a WordPress plugin for the publish gate, but the Google Docs and Word integrations are not on parity yet. If your team writes in Word or in the browser and wants a polish tool at the cursor, Quillbot fits the editorial muscle memory better today.
Quillbot's free tier gives access to a 100-word paraphrase limit, basic grammar checking, a summarizer with capped input length, limited AI detector access and up to 100 words of humanizing with limited usage. It is gated behind a Google or email signup, but the surface area is broader than most free plans on the market. For a hobbyist blogger writing one essay a fortnight, the Quillbot free tier shows off more of the product than TextSight's free tier shows off of its writing-suite side. If your publish cadence is low and your monetisation is non-existent, the Quillbot free tier alone might be enough.
If you fit any of those patterns and you do not publish on AdSense-monetised WordPress or paid Substack, the rest of this page is informational rather than persuasive. Quillbot is the tool for the job.
For bloggers worried about Google's helpful-content updates, AdSense revenue, paid Substack subscriber trust and sponsorship credibility, here is where TextSight beats Quillbot on the work that decides whether the post earns its keep.
Google's March 2024 and refreshed March 2025 helpful-content updates expanded scaled-content-abuse classifiers, and the early case studies of de-ranked blogs share a common signal: archives of high-AI-fingerprint posts. TextSight is purpose-built for that detection layer and tracks within 5 to 10 points of Originality, Copyleaks and GPTZero across our internal long-form test set. Run each post through TextSight before publish, fix the flagged sentences, and the archive stays clean. Quillbot's detector is one feature on a paraphraser-first product, and we have not measured its accuracy.
Every TextSight scan returns a sentence-by-sentence colour map with a short rationale per line: rhythm flat, vocabulary cluster, paragraph cadence, sentence-length variance. You edit the specific lines instead of rewriting the whole essay. Quillbot returns a document-level score without per-sentence breakdown, so editing means guessing which paragraphs to touch. On a 2,000-word post with six flagged sentences, the per-line evidence cuts editing time from about thirty minutes to under ten. For a blogger publishing on cadence with a day job, this is the difference between hitting Friday's slot and slipping to Saturday.
AI detectors can over-flag formally-taught English from non-native writers, and that is a real risk for bloggers in India, the Philippines and across Southeast Asia building English-language audiences. Our training data includes second-language academic prose, and we measured the result rather than claiming one: on 1,180 human-written academic papers, second-language writers were flagged 4.6% of the time against 8.1% for native writers, a gap whose confidence interval crosses zero, so there is no significant difference in either direction. For a non-native English blogger worried about being mislabelled as AI by a sponsor's checker or a guest-post host's plagiarism scan, a published number is something you can point to.
The TextSight humanizer optimizes for rhythm, sentence-length variance and vocabulary-cluster removal rather than fluency or formality. On 50 GPT-4 paragraphs, in our test of the humanizer's earlier modes, the middle setting dropped average AI scores by 58 points and the strongest by 71. Today the modes are Basic (free) plus Advanced, Business and Casual on Starter and up. The humanizer lives in the same UI as the scan; you click Humanize on a flagged sentence and the rewrite drops in place. Quillbot's AI Humanizer shows its own Human score, and its AI Detector is a separate tool.
TextSight's free tier gives 3 scans a day: up to 1,000 words each with no account, or up to 1,500 words with a free account, which covers a 1,500-word post with no card, no ads. One overall AI score per scan and the Plagiarism Risk layer are included on free; sentence-level highlights start on Starter. The WordPress plugin scans posts inside the Gutenberg editor before publish, with sentence highlights in the sidebar and the Humanization Score in the publish panel. For hobbyist bloggers publishing weekly the free tier alone covers the workflow. For self-hosted WordPress with contributors, the Pro plugin quotas handle the editorial gate. Quillbot has no native publish-gate plugin.
Most working bloggers do not pick one. They use Quillbot during drafting and TextSight before publish. Here is what an afternoon on a 1,500-word Substack essay or a 2,000-word WordPress guide looks like with both tools in the same tab stack.
Open three reference posts and a research PDF, run the PDF through the Quillbot summarizer to get the key claims in 200 words. Outline in your editor of choice, draft a section structure. Write the first draft in your own voice, leaning on personal experience for the Experience and Expertise layer Google's quality raters score. Hit one paragraph that reads stiff, paste it into the Quillbot paraphraser on Fluency mode, swap two sentences back in. Catch comma splices and tense slips with the grammar checker. Generate one APA citation for the headline stat. Total time on the draft, about 90 minutes.
Paste the full 1,500 words into the TextSight scanner or open the WordPress plugin from the Gutenberg sidebar. The AI score lands at 62, with six sentences highlighted as AI-likely and two phrases flagged as plagiarism risk. Click Humanize on each red sentence on Basic mode and the rewrites drop in place keeping the meaning and your voice. Rewrite the two plagiarism-flagged phrases manually in twenty seconds. Re-scan. Score moves to under 25, no red sentences, no plagiarism flags. Hit Publish. Total time on the publish pass, about eight minutes.
Quillbot Premium at $8.33 a month plus TextSight Starter at $7.49 a month, both on annual billing, is $15.82 a month. Month to month the same pair is $29.94, at $19.95 for Quillbot Premium and $9.99 for Starter. A paid Substack with 50 subscribers at $7 a month is $350 monthly revenue. The dual stack pays for itself five times over before the second post of the month. For AdSense-monetised WordPress the math is similar: a 5 percent traffic dip from one helpful-content review would cost more in lost ad impressions than two years of the combined subscription. Both are deductible as business software for self-employed bloggers, which makes the post-tax cost negligible against the revenue line they protect.
TextSight Pro is $19.99 monthly or $14.99 monthly on annual billing, 100 actions a day. Quillbot Premium is $19.95 monthly, or $8.33 monthly billed annually, for the paraphraser, grammar, summarizer, detector and humanizer bundle. Two prices, two different jobs, and the working-blogger answer is often both.
Yearly billing saves 63%. Quillbot Premium is $19.95/mo, or $8.33/mo billed annually, for the full writing suite (paraphraser, grammar, summarizer, plagiarism, detector, humanizer). View full pricing →
Both products are built by serious teams solving different problems. For bloggers the honest answer is monetisation-specific. Use this picker to match the tool to the cadence and revenue model you actually run.
If you publish on cadence and monetise on AdSense, paid Substack or sponsorships, the honest answer is both subscriptions. Combined cost is roughly $20 to $25 a month and one retained subscriber a year covers the full annual stack.
The freelancer deliverable comparison: Upwork milestones, ESL false positives and the REST API tier.
Read the compare →The essay-workflow comparison: Turnitin, ESL false positives and the student-writer discount.
Read the compare →The helpful-content workflow: how to keep AI drafts off Google's scaled-content classifier.
Read the guide →The publish-gate detector page: WordPress plugin, Substack workflow, AdSense risk.
See the page →Run one blog draft through TextSight's free tier before your next Substack publish or WordPress schedule. An overall AI score in about six seconds; sentence-level highlights start on Starter.
Honest head-to-heads with other detectors and humanizers.