{ "title": "ZeroGPT Alternatives 2027: 12 Paid, Free & Open-Source", "url": "https://zekaiwork.com/alternatives/zerogpt/", "summary": "The best ZeroGPT alternatives in 2027 are Originality.ai (best overall, $12.95/mo billed yearly), GPTZero (best free plan: 10,000 words a month) and SlopTotal (best open source, MIT). ZeroGPT itself starts at $8.99/mo billed yearly. Zekai checked these prices on vendor pages on 13 Nov 2026; 9 more are compared below, including 3 with a free plan and 4 open source.", "tool": { "name": "ZeroGPT", "starting_price": "$8.99/mo billed yearly", "free_plan": "15,000 characters per AI detection", "price_checked": "2026-11-11", "pricing_url": "https://www.zerogpt.com/pricing" }, "task": "AI content detector", "prices_checked": "2026-11-13", "date_modified": "2026-11-13", "alternatives": [ { "name": "Originality.ai", "type": "Free plan + paid", "starting_price": "$12.95/mo billed yearly", "free_plan_limit": "10K words once (100 credits)", "best_for": "Bulk content checks for publishers and agencies", "difference": "Pro gives 200K words (2K credits) a month with 30-day scan history, bulk scan, PDF download and extra team seats; its free plan is a one-time 10K-word allowance, not a monthly quota.", "price_checked": "2026-11-11", "pricing_url": "https://originality.ai/pricing", "website": "https://originality.ai", "zekai_score": 7.7, "zekai_review": "https://zekaiwork.com/ai-tools/originality-ai/" }, { "name": "GPTZero", "type": "Free plan + paid", "starting_price": "$12.99/mo billed yearly", "free_plan_limit": "10,000 words per month, 1 advanced scan", "best_for": "Teachers wanting sentence highlights and model detection", "difference": "Free plan allows 10,000 words a month; Premium lists multi-model detection (Gemini, Claude, LLaMa), mixed AI and human text detection and paraphraser or bypasser detection, with 300,000 words a month.", "price_checked": "2026-11-11", "pricing_url": "https://gptzero.me/pricing", "website": "https://gptzero.me", "zekai_score": 6.3, "zekai_review": "https://zekaiwork.com/ai-tools/gptzero/" }, { "name": "Winston AI", "type": "Free plan + paid", "starting_price": "$10/mo billed yearly", "free_plan_limit": "2,000 credits, 14-day trial", "best_for": "Detecting AI text, images and deepfakes together", "difference": "Credit-based: Essential gives 100,000 credits a month and covers AI image and deepfake detection, OCR for pictures and handwriting, plagiarism checks and shareable PDF reports.", "price_checked": "2026-11-11", "pricing_url": "https://gowinston.ai/pricing/", "website": "https://gowinston.ai", "zekai_score": 7.7, "zekai_review": "https://zekaiwork.com/ai-tools/winston-ai/" }, { "name": "Copyleaks", "type": "Paid", "starting_price": "$13.99/mo billed yearly", "free_plan_limit": "No free plan", "best_for": "Plagiarism plus AI checks bought by credit", "difference": "Sells by credit: Personal is $13.99 a month billed yearly and Pro $74.99 billed yearly; the pricing page lists no free plan, and its FAQ says one credit covers up to 250 words.", "price_checked": "2026-11-11", "pricing_url": "https://copyleaks.com/pricing", "website": "https://copyleaks.com", "zekai_score": 6.6, "zekai_review": "https://zekaiwork.com/ai-tools/copyleaks/" }, { "name": "Quetext", "type": "Free plan + paid", "starting_price": "$14.99/mo", "free_plan_limit": "Up to 1,000 words for the AI detector", "best_for": "Plagiarism checker and AI detector bundle", "difference": "Essential bundles a DeepSearch plagiarism checker and AI detector on one 100k-words-a-month allowance, plus a humanizer and summarizer; the free plan limits its detector to 1,000 words.", "price_checked": "2026-11-11", "pricing_url": "https://www.quetext.com/pricing", "website": "https://www.quetext.com", "zekai_score": 7.6, "zekai_review": "https://zekaiwork.com/ai-tools/quetext/" }, { "name": "Isgen", "type": "Paid", "starting_price": "$8/mo billed yearly", "free_plan_limit": "No free plan", "best_for": "Low-cost academic detector with plagiarism check", "difference": "Academic plan is $8 a month billed yearly for 350,000 detection words a month, phrase-level analysis, a plagiarism checker, batch upload and 15 days of document history.", "price_checked": "2026-11-11", "pricing_url": "https://isgen.ai/pricing", "website": "https://isgen.ai", "zekai_score": 7.3, "zekai_review": "https://zekaiwork.com/ai-tools/isgen/" }, { "name": "Sapling", "type": "Free plan + paid", "starting_price": "$25/mo", "free_plan_limit": "2,000 characters per check", "best_for": "AI detector inside a writing-suggestions tool", "difference": "Free detector checks stop at 2,000 characters; Pro raises that to 100,000 characters and 10 files per batch, and bundles writing suggestions with a usage-billed API for developers.", "price_checked": "2026-11-11", "pricing_url": "https://sapling.ai/pricing", "website": "https://sapling.ai", "zekai_score": 7.5, "zekai_review": "https://zekaiwork.com/ai-tools/sapling/" }, { "name": "SlopTotal", "type": "Open source", "starting_price": "Free (self-hosted)", "free_plan_limit": "No limit (self-hosted)", "licence": "MIT", "best_for": "Self-hosted multi-engine AI text detector", "difference": "Runs 23 detection engines, including Binoculars and Fast-DetectGPT, on your own CPU and returns one calibrated score with per-engine votes, file and URL scanning, and a JSON API.", "price_checked": "2026-11-13", "website": "https://sloptotal.com", "repository": "https://github.com/pablocaeg/sloptotal", "zekai_open_source_page": "https://zekaiwork.com/free-open-source/sloptotal/", "commercial_use": "Yes (MIT).", "runs_on": "Runs on CPU; loaded models need about 8.3 GB of RAM; GPU optional.", "setup": "moderate: One docker run command; models download on first start.", "github_stars": 114, "stars_checked": "2026-11-13", "last_commit": "2026-11-03", "last_release": "2026-11-03", "zekai_score": 6.9, "zekai_review": "https://zekaiwork.com/free-open-source/sloptotal/" }, { "name": "Binoculars", "type": "Open source", "starting_price": "Free (self-hosted)", "free_plan_limit": "No limit (self-hosted)", "licence": "BSD-3-Clause", "best_for": "Research-grade zero-shot detection you run yourself", "difference": "Zero-shot detector, no training data needed; the repo states it scores text with two Falcon-7B models and lets you pass other scoring models to the Binoculars class.", "price_checked": "2026-11-13", "website": "https://github.com/ahans30/Binoculars", "repository": "https://github.com/ahans30/Binoculars", "zekai_open_source_page": "https://zekaiwork.com/free-open-source/binoculars/", "commercial_use": "Yes for the code (BSD-3-Clause); check the licence of the Falcon models you download.", "runs_on": "Python 3.9; two 7B models, so a GPU or large-memory machine.", "setup": "hard: Clone the repo, pip install, then download two 7B models.", "github_stars": 435, "stars_checked": "2026-11-13", "last_commit": "2024-05-14", "zekai_score": 3.5, "zekai_review": "https://zekaiwork.com/free-open-source/binoculars/" }, { "name": "Fast-DetectGPT", "type": "Open source", "starting_price": "Free (self-hosted)", "free_plan_limit": "No limit (self-hosted)", "licence": "MIT", "best_for": "Zero-shot detection from an ICLR 2024 paper", "difference": "ICLR 2024 zero-shot method using conditional probability curvature; the README reports 0.9887 AUROC on five-model generations and ships a local script, with no dashboard or upload.", "price_checked": "2026-11-13", "website": "https://fastdetect.net/", "repository": "https://github.com/baoguangsheng/fast-detect-gpt", "zekai_open_source_page": "https://zekaiwork.com/free-open-source/fast-detect-gpt/", "commercial_use": "Yes (MIT).", "runs_on": "Authors ran it on an 80 GB A100; the local demo defaults to gpt-neo-2.7B.", "setup": "hard: Python 3.8 and PyTorch 1.10 environment plus model downloads.", "github_stars": 440, "stars_checked": "2026-11-13", "last_commit": "2026-02-07", "zekai_score": 5.1, "zekai_review": "https://zekaiwork.com/free-open-source/fast-detect-gpt/" }, { "name": "Open Detector", "type": "Open source", "starting_price": "Free (self-hosted)", "free_plan_limit": "No limit (self-hosted)", "licence": "MIT", "best_for": "Academic-paper AI detection with a small model", "difference": "BERT-base classifier trained for academic papers; the README claims 99.57% accuracy on its own dataset and says it is stylometric only. It is a model and script, not a web app.", "price_checked": "2026-11-13", "website": "https://github.com/Imalwayshere/Open-Detector", "repository": "https://github.com/Imalwayshere/Open-Detector", "zekai_open_source_page": "https://zekaiwork.com/free-open-source/open-detector/", "commercial_use": "Yes (MIT); the Hugging Face model card also states MIT.", "runs_on": "Python with PyTorch and Transformers; BERT-base model, 512-token input.", "setup": "moderate: pip install transformers torch, then a short Python script.", "github_stars": 254, "stars_checked": "2026-11-13", "last_commit": "2026-11-12", "zekai_score": 6.4, "zekai_review": "https://zekaiwork.com/free-open-source/open-detector/" }, { "name": "SynthID Text", "type": "Open source", "starting_price": "Free (self-hosted)", "free_plan_limit": "No limit (self-hosted)", "licence": "Apache-2.0", "best_for": "Watermark detection for text you generate", "difference": "Google DeepMind reference code that detects only text carrying its SynthID watermark; the frequentist detector gives a binomial p-value for a key, so it cannot flag unwatermarked ChatGPT or Claude output.", "price_checked": "2026-11-13", "website": "https://github.com/google-deepmind/synthid-text", "repository": "https://github.com/google-deepmind/synthid-text", "zekai_open_source_page": "https://zekaiwork.com/free-open-source/synthid-text/", "commercial_use": "Yes (Apache-2.0), but the repo calls itself a reference implementation, not for production.", "runs_on": "Any GPU such as a T4 for Gemma 3 270M; GPT-2 runs on CPU.", "setup": "moderate: Python virtual environment and a Jupyter notebook from the repo.", "github_stars": 1300, "stars_checked": "2026-11-13", "last_commit": "2026-10-26", "zekai_score": 6.3, "zekai_review": "https://zekaiwork.com/free-open-source/synthid-text/" } ], "faq": [ { "q": "What is the best alternative to ZeroGPT in 2027?", "a": "Originality.ai is the best overall ZeroGPT alternative on this page ($12.95/mo billed yearly). For no cost, GPTZero has a free plan (10,000 words per month, 1 advanced scan). To self-host, SlopTotal is open source (MIT)." }, { "q": "Is there a free version of ZeroGPT?", "a": "Yes. ZeroGPT has a free plan: 15,000 characters per AI detection. Paid plans start at $8.99/mo billed yearly, checked on 11 Nov 2026." }, { "q": "Is there a 100% free alternative to ZeroGPT?", "a": "Yes. SlopTotal, Binoculars, Fast-DetectGPT, Open Detector, SynthID Text are open source and free to self-host. Originality.ai, GPTZero, Winston AI, Quetext, Sapling have a free plan with limits, shown in the table." }, { "q": "What is cheaper than ZeroGPT?", "a": "Isgen starts at $8/mo billed yearly, against $8.99/mo billed yearly for ZeroGPT, as listed on each vendor's pricing page on 11 Nov 2026." }, { "q": "How much do ZeroGPT alternatives cost for a team of 5?", "a": "If each of 5 people buys the entry paid plan, at the prices Zekai checked on 13 Nov 2026, the monthly cost is Isgen $40/mo, Winston AI $50/mo, Originality.ai $64.75/mo, against ZeroGPT $44.95/mo for ZeroGPT. Team and business plans can cost more per seat. The Zekai Cost Finder on this page recalculates for any team size." }, { "q": "Which is better, Originality.ai or ZeroGPT?", "a": "Pro gives 200K words (2K credits) a month with 30-day scan history, bulk scan, PDF download and extra team seats; its free plan is a one-time 10K-word allowance, not a monthly quota. Choose Originality.ai if you check freelancer or agency content in bulk and want scan history, shareable reports and team seats. Stay with ZeroGPT if you only paste short texts now and then and want a free tier that resets every month." }, { "q": "Why are people leaving ZeroGPT?", "a": "The documented reasons are: The free plan caps each AI detection at 15,000 characters and allows 0 batch files; Pro lifts the cap to 100,000 characters and 50 batch files (11 Nov 2026); Pro costs $14.99 a month when billed monthly versus $8.99 a month billed yearly, and the 750-word plagiarism check on Pro is one-time only (11 Nov 2026). Each is sourced in the section above." }, { "q": "What is better than ZeroGPT?", "a": "It depends on the job: GPTZero adds sentence highlighting and model detection, Originality.ai suits bulk publisher checks, and Winston AI also screens images. Compare them in the table above." } ], "publisher": "Zekai (zekaiwork.com) — independently reviewed; prices read on vendor pages on the dates shown.", "licence": "Free to quote with a link to https://zekaiwork.com/alternatives/zerogpt/. Bulk copying or republishing the dataset is not permitted." }