GPTinf alternatives: which one actually fits how you write

If your job is rewriting a lot of text every month, GPTinf's structure is hard to beat on paper, and switching may cost you more than it saves.

GPTinf's pricing page prices three tiers with the billing toggle defaulting to "Yearly (Save 50%)": Lite at $4.99 per month with 5,000 humanizer words and 2,500 paraphraser words, Pro at $12.49 per month with 25,000 humanizer words and 12,500 paraphraser words, and Unlimited at $29.99 per month with unlimited humanizer and paraphraser words (www.gptinf.com/pricing, checked 16 August 2026). Every tier, including Lite, lists unlimited plagiarism checks, unlimited grammar checks, unlimited AI detector checks, unlimited re-humanizing, unlimited selective rephrase, unlimited freeze keywords and access to all rewrite modes (same page and date).

Three specifics are worth naming, because few competitors match all of them at once:

• Freeze keywords, on every tier. If you write with citations, product names, drug names or legal terms that must survive a rewrite untouched, this is a real workflow feature, not a checkbox.
• Selective rephrase. You can rework a paragraph rather than the whole document.
• A word bank that survives cancellation. GPTinf's FAQ states that plans are month to month and that "we'll keep your remaining word balance available until period-end" (www.gptinf.com/pricing, checked 16 August 2026).

There is also a free path in before you pay. GPTinf's FAQ says you can humanize up to 120 words without signing up, "and another 120 after you create a free account, so 240 in total" (www.gptinf.com/pricing, checked 16 August 2026).

One thing to read carefully rather than take on faith: GPTinf's own pricing FAQ says all plans include "Ultra Humanization", which it describes as guaranteeing that its output passes AI detectors "without exception" (www.gptinf.com/pricing, checked 16 August 2026). That is the vendor's claim about its own product, quoted here so you can weigh it. No tool controls what a third party detector will say about a given passage on a given day, and detectors change. Treat any guarantee of that shape as a marketing position, not a measured outcome, whoever is making it.

Stay on GPTinf if rewriting volume is the constraint and you use freeze keywords or selective rephrase regularly. Nothing else in this table gives you unlimited rewriting for a published price under $30 per month.

Move to Netus AI if you want a free tier that stays usable indefinitely rather than a one-time trial. Netus AI's free plan lists 50 credits per month, 500 rewriter words per month, and "AI Detector - unlimited usage" (netus.ai/pricing, checked 16 August 2026). Learn the credit maths first: 1 credit equals 10 words, so 1,500 credits is 15,000 words, and article generation draws from the same pool at 260 credits per long article.

Move to Smodin if the rewriting was only one part of the job and you also need a plagiarism checker, a translator and an AI writer under one subscription. Smodin's Starter plan at $12.99 per month lists all core tools included (smodin.io/pricing, checked 16 August 2026).

Move to Isgen if you are non-English and rewriting matters more than checking. Read the tier table closely, though: Isgen's own feature comparison shows the $15 Writing tier has AI Detector marked "No" and Plagiarism Checker marked "No", while the cheaper $8 Academic tier has both marked "Yes" (isgen.ai/pricing, checked 16 August 2026). The tiers are built around different jobs, not as a simple ladder.

Move to TextSight if what you actually needed was the checking half. This is the honest scope of it: we score text, show you sentence-level analysis from Starter upward, export a PDF report from Starter upward, and offer bulk scan, file upload and URL scan. Pro and above adds a Chrome extension and a REST API. Business adds teams and branded reports. We do not publish a rewriting word bank in the shape GPTinf does, and we do not make claims about what any third party detector will return.