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.

Crustdata is a B2B data provider offering real-time company & people datasets. Access APIs and live signals to power sales and investment workflows.

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.

Free online developer tools for testing and debugging. JSON formatter & validator, Base64 encoder/decoder, URL encoder, JWT decoder, Hash generator, UUID generator, Regex tester, Text diff tool, HTTP request tester, Lorem Ipsum generator, Password generator, Word counter, Data converter (CSV/JSON/XML), and more. Fast, secure, client-side processing.

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.

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.

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.

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.

Search 5M+ podcasts with AI. Get podcast analytics, listener statistics, chart rankings across 100+ countries, audience demographics, and contact data. The podcast database for marketers and agencies.

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.

BevWire company search JSON. This API allows individuals or organizations doing market research on beverage companies to find links to all BevWire articles mentioning that company, in JSON format.

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

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

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.

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

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

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 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.

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

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

Stop solving the same support ticket twice. DeskGraph finds past tickets by meaning and screenshots, not just keywords.

Get AI-powered answers grounded in real-time web search. Drop-in OpenAI compatible. Inline citations, knowledge mode, streaming. As low as $0.0025/query.

SaaS platform with a REST API (60+ endpoints) for academic citation search, formatting, and management. Built with Next.js, Supabase, and CSL (Citation Style Language). Integrates with OpenAlex, PubMed, Semantic Scholar, CrossRef, and more. Includes browser extensions, Google Docs add-on, and Word add-in.

Freely combine various musical elements to create your own unique suno style and lyrics with suno metatags. Various lyrics types: rock, pop, rap ...

Compare two JSON files online and instantly detect differences, missing keys, and value changes. This tool provides a side-by-side JSON diff view with semantic comparison, making it easy to debug API responses, configurations, and large JSON datasets. Supports nested JSON structures, highlights changes clearly, and works directly in the browser without any installation. Perfect for developers working with APIs, debugging payloads, or validating JSON responses.

Access full vehicle information using plate or VIN number. Database updated with millions of records.

Transform AI-generated text into natural academic writing. Improve fluency, preserve citations, and produce polished scholarly prose in seconds.

MusicMakerApp creates royalty-free music with our AI Music Maker. Use our AI Song Generator to generate free songs with 2026 cutting-edge AI technology online.

AI-powered UK business intelligence platform covering 5.9M companies from 53 government sources. Risk scoring, director networks, semantic search, and AI chat.

Humaniser.ai is a browser-based rewriting tool that helps turn stiff, AI-shaped text into smoother, more natural writing. It supports pasted text and file uploads, works well for shorter drafts, and is currently available as a free AI humanizer with a 3,000-word limit per run.

Your competitors already appear in ChatGPT. Do you? Surfeo measures your AI visibility, tells you what to improve, and creates the content. From €0/month.

WriteNexa is an AI-driven writing assistant that helps users quickly create, refine, and optimize content for blogs, academics, and marketing. It combines smart content generation with editing and SEO support to make writing faster, easier, and more effective.