Grammarly is an AI writing assistant that checks grammar, spelling, punctuation, clarity, and tone. It works across email, documents, social media, and messaging apps to help you communicate more effectively.

Grammarly

RewriteAI is an AI humanizer that rewrites ChatGPT, Claude, Gemini, DeepSeek, Grok or Copilot output so it reads like a person wrote it, without losing the original meaning.

Most rewriters are prompt wrappers around a general-purpose model, which is why their output still trips detectors. RewriteAI runs its own model, trained on thousands of human-written texts, so the result is a deep rewrite rather than synonym substitution — sentence structure and rhythm change, not just word choice. The site reports a 99% bypass rate against Turnitin, GPTZero, Originality.ai, Copyleaks, ZeroGPT and Winston AI, with an academic mode for university-grade detection. Output is plagiarism-free, SEO-safe and indexed by Google normally, and you get several variants to pick from.

The site also includes a built-in AI detector, an AI writer, an AI watermark remover, and 40+ free writing tools: grammar checker, summarizer, tone converters, essay outline and thesis generators, and an APA/MLA/Chicago citation generator. Developers can call the same engine through the Humanizer REST API.

Free to try with no signup; the free plan is 500 words a month with no card. Paid plans start at $9.99/mo. 110,000+ users.

RewriteAI

Alex Halpin

NovelShaft is a fiction-writing workspace for authors who want their manuscript, story notes, and AI conversations in one project.

Start with templates for characters, worldbuilding, outlines, scenes, and clues. Give the AI agent a concrete task, let it refer to your project materials, and follow its visible progress while it works. Review the result and decide what belongs in your story.

For example, an author can build character profiles, organize a scene plan, and ask the agent to help develop the next scene using the established notes. The workspace keeps planning and writing connected, with the author in control of the result.

Available on the web and iOS, with English and Japanese interfaces. An account is required. A free plan is available, with optional paid subscriptions for additional AI usage.

Watch the English walkthrough: https://www.youtube.com/watch?v=--2gVrU_cIg
Explore real screenshots: https://www.producthunt.com/products/novelshaft
iOS: https://apps.apple.com/us/app/novelshaft/id6796708818

The screenshots and video show fictional demonstration projects. Submitted by Yutaro Amano, maker of NovelShaft.

NovelShaft

Yutaro Amano

Operating as a dedicated text utility, AI Text Watermark Remover assists with cleaning AI-assisted drafts. It detects 60+ invisible Unicode code points while leaving visible wording untouched. Users can access a free Markdown cleaner to remove unwanted headings, quotes, lists, and emphasis tags. All free tools run inside your web browser without storing pasted text. Pro rewrite is available if simple deletion proves insufficient for your draft.

AI Text Watermark Remover

Evan Reed

BidNinjas.ai is an AI-powered platform built for freelancers who want to win more projects with less effort. Generate personalized Upwork proposals in seconds, analyze job descriptions, optimize your freelancer profile, prepare for interviews, and improve your application success rate. BidNinjas helps freelancers save time, create higher-quality proposals, and stand out from the competition with AI-driven insights and automation tools.

BidNinjas.ai

BidNinjas

AnyAIZero is a free AI writing tool that combines an AI humanizer and an AI detector in one workflow. The humanizer rewrites text from ChatGPT, Claude, and Gemini into natural, human-quality writing across 8 modes (Standard, Natural, Academic, Formal, Informal, Concise, Expand, Shorten) — restructuring sentences rather than just swapping synonyms. The built-in detector uses multi-dimensional analysis (sentence uniformity, transition density, readability variance, and more) to show you why a text reads as AI-generated, not just a percentage. Free with no signup: 3,000 words/day for the humanizer, unlimited free detection. Supports English, Spanish, and German. Text is processed in memory and never stored. Built for students, teachers, ESL writers, and content teams working with AI text.

AnyAIZero

Copy.ai is a GTM AI platform that automates content creation for marketing teams. Generate blog posts, product descriptions, social media captions, email sequences, and ad copy in seconds with built-in brand voice controls.

Copy.ai

Stop guessing the YouTube algorithm. Audit video titles for mobile layouts, analyze tags, and generate high-retention script ideas instantly with data-driven creator tools.

GnorixX

Jitesh

Katteb is an AI agent automation and content creation platform. It lets teams deploy AI agents that research the web, write and generate multilingual content, images and video, and publish it automatically - turning repetitive marketing and content workflows into hands-off automations.

Katteb

Ahmed

AI Undetectable is an AI rewriter and humanizer designed to help AI-generated writing pass AI detectors. Paste a draft, choose Basic or Stealth, and select a writing type: general writing, essay, article, marketing material, or story. The editor keeps the original and rewritten text side by side for review. Text and image detection are separate tools, with access depending on the plan.

The humanizer accepts up to 750 words per request. Basic uses one credit per input word and Stealth uses two. The editor and selected full-essay examples are public without signup; running the tools requires a 3-day trial followed by a paid subscription. Monthly plans start at $9.99. Detector outcomes vary; no tool can guarantee every detector result.

Submitted by the founder. AI assisted with this description. The attached image is an actual product screenshot.

AI Undetectable

Ben Portman

ZeroGPT vs GPTZero is a detailed comparison guide that explores two popular AI detection tools used for identifying AI-generated content.

This comparison explains differences in detection features, accuracy, pricing, usability, and ideal users. It helps students, educators, writers, publishers, and professionals understand which AI detection solution fits their needs.

The guide covers how both platforms analyze AI-written text, their strengths, limitations, and practical applications in content verification.

Imperial AI Tools provides AI tool reviews, comparisons, and guides to help users discover useful AI software and make informed decisions.

ZeroGPT vs GPTZero

Suneela Rubab

Writon turns keywords into complete SEO blog articles with featured images and publishes them to WordPress by hand, on a schedule, or on autopilot behind a quality score. It connects to your WordPress site through an Application Password (REST API), so there is no plugin to install.

Import keywords from a CSV, a Google Sheet or a pasted list, set up writing profiles for tone and structure, and polish drafts in an editor with a built-in quality score. Agencies can share client review links and export articles to PDF or Word. A scheduling calendar plans posts ahead, internal-link suggestions (beta) help connect content, and Search Console analytics show how published posts perform. Writon writes in many languages, including Urdu and Arabic.

Pricing: $1 per article, or Starter $9/mo (10 articles), Growth $20/mo (25), Pro $29/mo (40). 7-day trial.

Writon

Farhan Ellahi

StyleMimic is an AI-powered text engine that learns your personal writing style from a short 40-word sample. Instead of relying on generic prompts, it measures your sentence rhythm, vocabulary, and punctuation habits to draft high-quality LinkedIn posts, emails, articles, and replies that genuinely sound like you. Every draft is scored for style match and originality, ensuring your unique digital fingerprint remains intact.

StyleMimic alternatives