Thesaurus Api
The best 50 Thesaurus Api AI tools - Free & Paid
Explore 50 AI for Thesaurus Api
Acade AI is an AI research assistant and academic writing platform that unifies literature search, PDF parsing, citation generation, data analysis, drafting, formatting, and translation in one workspace. It connects to Google Scholar and PubMed for source-verified retrieval, supports APA, IEEE, and
Free trial
- $14.99/mo
Thesify is an academic assistant that offers feedback on theses, dissertations, and grant proposals, evaluating strength, evidence, clarity, and rubric alignment. It provides instant citation support from 200 million references and delivers article summaries, semantic literature search, and paper di
Freemium
Semantic Scholar indexes 230 million papers, offering AI‑powered semantic search that prioritizes relevance and citation impact. It provides contextual PDF annotations, a developer API, and export options for literature reviews, grant research, and teaching.
Free
TheNeo is an AI-powered tool that generates high-quality API documentation with descriptive summaries and collaborative editing features.
Subscription
An AI paraphrasing tool that rewords up to 125 words per input with unlimited use. Offers ten modes, a synonym slider, AI thesaurus, export options, originality detection, browser extensions, and multilingual support for students, researchers, and professionals.
Subscription
Langsearch is a web search API that enables natural language queries and semantic reranking for improved search accuracy. It offers real-time access to diverse information, making it suitable for AI agents and applications needing enhanced search capabilities.
Free trial
An AI platform that rewrites text in eight styles—Standard, Fluency, Humanizer, Simplify, Creative, Academic, Shorten, Expand—while supporting custom modes, tone settings, synonym selection, audio‑to‑text, OCR, and a research panel. Available via browser extensions, mobile apps.
Free
SOM AI is an AI chatbot for Indonesian university students and researchers that brainstorms research titles, paraphrases text to lower plagiarism, explains complex concepts, and guides thesis outlines and literature reviews while saving conversation history for future reference.
Freemium
SpeechGen.io converts up to 2 million characters into high‑quality neural‑voice audio across 150 languages with 5,000 models. It allows voice, speed, pitch, volume control, SSML tags, background music, multi‑speaker tagging, downloadable formats, and a REST API.
Paid
- $4.99
SharpAPI is a multifaceted AI tool for app development, encompassing e-commerce, sentiment analysis, content automation, and HR tech support. It provides features such as product intros, summarization, and job description generation across multiple industries.
Freemium
Phrasly is an AI tool that generates undetectable text, bypasses AI detectors, provides grammar checking, supports multilingual content generation, and features a co-writing assistant for assignments, content creation, and skill enhancement.
Free trial
iAsk.Ai delivers instant, factual answers to natural‑language questions from authoritative web sources, and offers essay drafting, advanced grammar checks, academic summarization, PDF analysis, image generation, URL bullet‑point briefs, and one‑click grammar correction. Accessible via browser extens
Freemium
- $9.95/mo
SlangThesaurus Translator is an online tool utilizing OpenAI's ChatGPT API to interpret urban slang, colloquial expressions, and informal language. Users can input words or phrases to generate slang translations.
Free
LanguageTool is an AI grammar, spelling, and style checker supporting 30+ languages. It offers real‑time browser extensions, desktop and Word add‑ins, advanced Picky Mode, paraphrasing, and an API for developer integration.
Free
Syntx.ai provides web and Telegram-bot access, letting users sign in with Telegram or email, link Google to sync settings and data across devices, manage subscriptions via web or bot, and receive Telegram notifications and account alerts.
Subscription
- $7.57/mo
Exa provides a low-latency web search API and crawler with vertical search (companies, people, code), token-efficient excerpts and machine-readable extracts with grounded citations, enabling agent workflows, analytics, and enterprise-ready security and access controls.
Freemium
Sassbook AI Text Summarizer is an advanced tool that uses AI to generate high-quality summaries from large amounts of text with configurable options.
Freemium
- $15/mo
Trieve is an AI infrastructure API that enhances search and discovery with advanced semantic vector and full-text search capabilities. It offers easy data management, no-code dashboard features, and self-hosting options for improved relevance and data privacy.
Freemium
AI Tools Directory offers a searchable catalog of 5,000+ AI tools organized by category and rating. Users can filter by application, bookmark selections, and access documentation or example projects, with regular updates to keep listings current.
Free
AI tool for searching and playing movie/TV dialogue clips using keywords. Includes login, favorites, and download options.
Sourcely is an AI academic search assistant that lets users paste text to retrieve relevant sources from a 200‑million‑paper database. It highlights citation sections, summarizes findings, offers free PDFs, supports multiple citation styles, and provides filtering and conversational clarification to
Subscription
- $19/mo
Rephras is an AI tool for composing, paraphrasing, and plagiarism checking. It offers 20 modes, 100+ languages, and a keyword-based content mode.
Freemium
toapis.com is a centralized model marketplace and API dashboard for comparing and routing across text, image, video, and audio models. It clarifies cost structures with token-, request-, and duration-based billing, and enables teams to set default routes with performance-informed fallback models for
Freemium
Synthesia is an AI video creation platform that enables users to create customizable videos in multiple languages using AI avatars and voices, saving time and budget for companies.
Freemium
DeepSeek API, available via Kie.ai, provides access to DeepSeek models R1 and V3 for complex reasoning and natural language processing.
Freemium
QuillBot is a writing and editing tool offering features such as paraphrasing, grammar and plagiarism checks, citation generation, and content creation assistance, all accessible through a Chrome extension or online platform.
Freemium
- $33/mo
You.com is an AI-based search engine that provides customized search results and summarizes web pages by categories, with Code Complete for technical information and shareable links.
AISEO Free paraphrasing tool for content with high uniqueness
Free trial
Blackbox AI is an AI-powered tool for developers that searches and autocompletes code snippets across multiple programming languages and repositories, extracts code from videos and PDFs, and converts queries into code.
Free trial
- $5/mo
Scribbr offers academic writing support with professional editing, plagiarism detection, citation generation across styles, AI‑powered proofreading, paraphrasing, summarizing, sentence rewriting, and a Chrome extension for in‑browser citations, helping students and researchers produce polished manus
Freemium
GooseAI is a fast NLP-as-a-service tool that provides text completion/generation and question/answer tasks through an API.
Usage based
- $0.00011
Sutro auto‑generates production‑grade backends from SLang data models, creating schemas, APIs, validation, and authentication. It eliminates boilerplate, syncs documentation, and supports prompt‑to‑backend and Figma‑to‑code conversions.
Freemium
Tavily offers a secure, high‑volume web‑access API that delivers real‑time search, extraction, and structured results. It includes caching, indexing, and content validation, preventing leaks and malicious data, and guarantees 99.99 % uptime for enterprise‑grade reliability.
Freemium
TextAdviser delivers AI‑powered language tools: grammar checking, plagiarism detection, syntactic analysis, fast text generation, rewriting, tone humanization, summarization, and name/title creation. It supports English, Spanish, Portuguese, Italian, French, and German for writers, students, markete
Free
talordata.com is a unified SERP API that delivers structured JSON data from Google, Bing, Yandex, and DuckDuckGo via a single REST endpoint. It enables automated parsing, AI/LLM ingestion, and real-time search monitoring for developers, SEO teams, and data analysts.
Free trial
Scavio AI is a real-time search API for AI agents that returns structured JSON data from Google, Amazon, YouTube, Walmart, and Reddit via a single endpoint. It extracts clean metadata for direct ingestion into models and agent workflows, with official SDKs for LangChain and MCP integration.
Free trial
- $30/mo
Lexica Aperture is a V5 text‑to‑image AI that generates up to 960×1440‑pixel images from natural‑language prompts. Its real‑time preview, prompt tweaking, and history features support rapid prototyping for designers, illustrators, and marketers.
Freemium
Humanize AI converts AI‑generated text into natural, readable language while preserving meaning, keywords, and SEO value. It supports multiple languages, works on any device without registration, removes plagiarism, and evades detection systems.
Free
Rewrites text in seven styles—Simple, Creative, Formal, etc.—across 17 languages, preserving meaning while enhancing grammar, punctuation, and readability. Removes duplicate phrases for plagiarism‑free output and works with plagiarism/readability tools for students, writers, and SEOs.
Paid
- $3
WordChanger is an AI‑powered word rewriter that suggests alternative vocabulary, adjusts tone, and corrects grammar in real time. It highlights replacements for easy acceptance and offers readability analytics, fluency checks, and plagiarism scanning across multiple languages.
Paid
Aithor automates essay creation, literature reviews, and topic ideation for academic and creative writers. It provides access to 10 million verified sources, manages MLA/APA citations, offers grammar checking, paraphrasing, summarization, and tone adjustment to streamline writing.
Freemium
Whisper API delivers fast, accurate speech‑to‑text with speaker diarization, translation, and summary in 100+ languages, supports diverse audio formats, is OpenAI‑compatible, and enables quick developer integration for streamlined workflows.
Freemium
- $0.15
TextGears is a grammar and spell checker with an API for automated proofreading, readability scoring, and text analysis. It supports multiple languages and offers both cloud-based and self-hosted deployment for integration into various business workflows.
Subscription
WebCrawlerAPI simplifies web crawling and data extraction with a developer-friendly API that retrieves website content in text, HTML, or Markdown, automates data cleaning, and handles complex challenges like JS rendering and anti-bot mechanisms.
Freemium
AI Humanizer transforms AI‑generated text into natural prose with Basic, Aggressive, and Enhanced modes. It offers synonym suggestions, rephrase options, keyword locking, multi‑language support, and outputs grammar‑correct, low AI‑detector scores without registration.
Subscription
- $20/mo