Similarity API

CopyChecker is a free, all-in-one online platform built to help writers, students, educators, journalists, and content creators produce original, high-quality content with confidence. Trusted by industry leaders worldwide, CopyChecker's mission is simple — make world-class content tools accessible to everyone, completely free. At its core, CopyChecker offers a powerful Plagiarism Checker that scans billions of web pages, academic databases, and online sources to detect duplicate content and deliver detailed, actionable reports. But it doesn't stop there. The platform also features an AI Content Detector, Reverse Image Search, Grammar Checker, a full suite of PDF Tools, and several other writing utilities — all designed with a clean, user-friendly interface that requires no technical expertise or sign-up to get started. Whether you're a student checking an essay before submission, a teacher verifying the originality of assignments, a content writer ensuring your work is SEO-ready, or a professional protecting your brand's credibility — CopyChecker has a tool built for you. No downloads, no hidden fees, just fast and reliable results right from your browser.

Elasticsearch is a distributed, RESTful search and analytics engine capable of storing data and searching it in near real time. Elasticsearch, Kibana, Beats and Logstash are the Elastic Stack (sometimes called the ELK Stack).

Our mission is to make you a search expert. Push data to our API to make it searchable in real time. Build your dream front end with one of our web or mobile UI libraries. Tune relevance and get analytics right from your dashboard.

Amazon Elasticsearch Service is a fully managed service that makes it easy for you to deploy, secure, and operate Elasticsearch at scale with zero down time.

Swiftype is the easiest way to add great search to your website or mobile application.

It is an open source search and analytics engine derived from Elasticsearch 7.10.2, and is currently in an alpha state.

It is a fast, open source text processor and publishing toolchain for converting AsciiDoc content to HTML5, DocBook, PDF, and other formats. Asciidoctor is written in Ruby and runs on all major operating systems

It makes it easy to build high-performance vector search applications. Developer-friendly, fully managed, and easily scalable without infrastructure hassles.

Amazon CloudSearch enables you to search large collections of data such as web pages, document files, forum posts, or product information. With a few clicks in the AWS Management Console, you can create a search domain, upload the data you want to make searchable to Amazon CloudSearch, and the search service automatically provisions the required technology resources and deploys a highly tuned search index.

It is a powerful, fast, open-source, easy to use, and deploy search engine. The search and indexation are fully customizable and handles features like typo-tolerance, filters, and synonyms.

Azure Search makes it easy to add powerful and sophisticated search capabilities to your website or application. Quickly and easily tune search results and construct rich, fine-tuned ranking models to tie search results to business goals. Reliable throughput and storage provide fast search indexing and querying to support time-sensitive search scenarios.

It is an open source, typo tolerant search engine that delivers fast and relevant results out-of-the-box. has been built from scratch to offer a delightful, out-of-the-box search experience. From instant search to autosuggest, to faceted search, it has got you covered.

It is a highly accurate and easy to use enterprise search service that’s powered by machine learning. It delivers powerful natural language search capabilities to your websites and applications so your end users can more easily find the information they need within the vast amount of content spread across your company.

It is the only cloud search service with built-in AI capabilities that enrich all types of information to easily identify and explore relevant content at scale. Formerly known as Azure Search, it uses the same integrated Microsoft natural language stack that Bing and Office have used for more than a decade and AI services across vision, language and speech. Spend more time innovating and less time maintaining a complex cloud search solution.

Your customers expect fast, near-magical results from your search. Help them find what they’re looking for with Bonsai Elasticsearch. Our fully managed Elasticsearch solution makes it easy to create, manage, and test your app's search.

It makes it easy for you to perform interactive log analytics, real-time application monitoring, website search, and more. OpenSearch is an open source, distributed search and analytics suite derived from Elasticsearch.

Create your own fully managed and hosted Elasticsearch cluster. You get a dedicated cluster with reserved memory, giving you predictable performance. There are no arbitrary limits on how many indexes or documents you can store. Scale your clusters as and when needed, without any downtime.

It is a full-text search engine written in C++ and a fork of Sphinx Search. It's designed to be simple to use, light and fast, while allowing advanced full-text searching. Connectivity is provided via a MySQL compatible protocol or HTTP, making it easy to integrate.

It is a text analyser in Python, can help make your text more clear, simple and useful for your readers. It provides information on an overall text as well as on individual paragraphs. It gives insights into readability, length of paragraphs, length of sentences, average sentences per paragraph, average words in a sentence, etc. It also tries to identify certain kind of vague words.

We help your website visitors find what they are looking for. AddSearch is a lightning fast, accurate and customizable site search engine with a Search API. AddSearch works on all devices and is easy to install, customize and tweak.

Yext's Answers Platform collects and organizes content into a Knowledge Graph, then leverages a complementary set of products to deliver relevant, actionable answers wherever customers, employees, and partners look for information.

Qbox is supported, dedicated, hosted Elasticsearch - the bleeding edge of full-text search and analytics. We provide an intuitive interface to provision, secure, and monitor ES clusters in Amazon EC2 and Rackspace datacenters everywhere.

It is the next-gen search & analytics engine built for logs. It is designed from the ground up to offer cost-efficiency and high reliability on large data sets. Its benefits are most apparent in multi-tenancy or multi-index settings.

Easily add custom full-text search, without the cost or complexity of managing search servers

Stop applying blindly. Let our 9-Agent Swarm reverse-engineer the hiring process and compile your resume like code to beat legacy ATS parsers.

It is an embeddable super fast full text search engine. It can be embedded into MySQL. Mroonga is a storage engine that is based on it.

The most advanced, consistent, and effective AI humanizer on the market. Instantly transform AI-generated text into undetectable, human-like writing in one click.

Generate engaging social media content instantly with AI. Create posts, captions, bios, and more for all platforms.

Millions of job postings through one simple API. Perfect for apps, AI agents, sales intelligence & HR tech.

Free cron expression translator for Unix and Quartz. Convert cron syntax to plain English with visual builder and multilingual support.

The web crawling, scraping, and search API for AI. Built for scale. Firecrawl delivers the entire internet to AI agents and builders. Clean, structured, and ready to reason with.

It is an intelligent site search solution designed to help eCommerce businesses increase onsite sales and improve the customer online shopping experience.

It is an open source Java wrapper for Elasticsearch, implementing an opinionated, fresh approach to implement new search/analytics enabled applications or enhance legacy software based on relational databases with powerful full text search capabilities.

That transforms AI-generated content into natural, undetectable human-like writing. Bypass AI detection systems with intelligent text humanization technology

Your AI-based shortcut to Instant research paper perfection The world’s #1 essay & research paper writer Start writing — it's free Blainy is the go-to research assistant for academic research and writing. Write better, faster, and with confidence Blainy offers instant research support, helping you create high-quality papers effortlessly. Learn More About This Feature Search

The best free TXT to SRT converter. Instantly convert plain text or timecoded scripts to standard SRT subtitle files online. No signup, privacy-focused.

Free to transcribe, translate, and summarize audio/video with ScreenApp AI. Get instant highlighted notes and save time with accurate AI tools.

Dechecker's AI Checker and AI Detector tool checks whether text is generated by AI models, such as ChatGPT, GPT-5, Claude, Gemini, LLaMa, etc.

NoteGPT is an AI-powered note-taking app that turns any lecture, meeting, or voice memo into clear, structured notes in seconds. It records and transcribes audio, then automatically creates concise summaries, flashcards, and study guides so you can revise faster and remember more. Built for students and busy professionals, NoteGPT keeps all your notes organised and easy to review whenever you need them.

PlagiarismRemover.AI is a free AI plagiarism remover SaaS platform which rewrites text into original, human-like content while preserving meaning and formatting. It helps content pass plagiarism and AI detection without sounding rewritten.

KokoQuest helps users discover and build lists of real companies that match highly specific business criteria. It supports natural-language searches for manufacturers, suppliers, service providers, partners, or customers, and returns ranked company lists with relevance scoring. KokoQuest covers the full workflow from company discovery to contact enrichment and email drafting, allowing users to go from search intent to outreach-ready leads in one place. Through its Gmail integration, the AI can translate a user’s intent into a ranked list of relevant companies, automatically enrich each with contact details, and draft a personalized email ready to send directly from Gmail. Unlike static lead databases, KokoQuest is designed for niche and hard-to-define markets where coverage is inconsistent or incomplete. It is useful for finding regional providers, contract manufacturers, private-label partners, and specialized B2B services that are often missing from traditional sales tools.

Use e4tools’ free online paraphrasing tool to quickly rewrite sentences, paragraphs, and articles with AI for clarity, readability, and originality.

JSON Editors is an online JSON editor and developer toolbox used to quickly format, validate, and inspect JSON data. It is commonly used during API development and debugging to ensure JSON responses are valid and readable. The platform also includes helpful utilities such as Base64 encode/decode, regex testing, cron tools, and color converters. JSON Editors runs entirely in the browser and requires no setup.

Build powerful news applications with NewsMesh. Access real-time news, trending articles, and search across 10+ categories.

SENTENCIFY is a 100% free AI paraphrasing tool that brings premium rewriting capabilities directly into your workflow. Unlike web-based editors, it integrates seamlessly with any desktop app or browser to offer three unique sentence variations instantly without copy-pasting. Experience the best free alternative to Quillbot and Grammarly without any paywalls.

The AI Senior Editor for creators. Stop writing from scratch. Turn YouTube transcripts and voice notes into viral Threads, LinkedIn Posts, and Newsletters instantly.

Generate academic essays and literature reviews with real citations using AI. Trusted by students and researchers worldwide. Free citation generator with APA, MLA, Chicago styles. Start your research today.

CrawlKit is an API-first web scraping platform that lets developers extract data, search results, screenshots, and LinkedIn insights from any website.

Shopme Agent is a next-gen shopping assistant that helps you find, compare, and buy products across Chinese and global platforms, including factory-direct sources, all in one place. It’s built to help users quickly discover hard-to-find items, compare prices, and access better buying options without switching apps.

The #1 tool to generate llms.txt and llms-full.txt files. We convert your website HTML into clean Markdown for ChatGPT, Claude, Grok, and Perplexity.