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MustHave.ai

Research

AI search, research, learning and evidence tools.

The MustHave seal explores tools with a magnifying glass and compass.

A little curiosity goes a long way.

Research

26 tools in this category

Editorial picks first, then more tools to explore.

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ChatGPT

ChatGPT is OpenAI’s general AI assistant for writing, research, coding, file analysis, image creation, voice conversations, and longer tasks that produce editable work.

AI AssistantsCodingFree tier; paid Go, Plus, Pro and Business

Claude

Claude is Anthropic’s AI assistant for thoughtful writing, research, coding, document analysis, visual creation, and longer work across web, desktop, mobile, and the terminal.

AI AssistantsCodingFree tier; paid Pro, Max and team plans

Gemini

Google Gemini is an AI assistant for research, writing, coding, image generation, and work across Gmail, Drive, Docs, Android, and the web.

AI AssistantsCodingFree tier; paid Google AI plans

Perplexity

Perplexity is an AI answer engine that searches the web, writes a direct response, and places source links beside the claims so readers can inspect the evidence.

AI AssistantsProductivityFree Standard; paid Pro, Max and Enterprise

Consensus

Search scholarly research and inspect AI-assisted summaries alongside the underlying papers and citations.

ProductivityResearchFree tier; paid Pro and Teams plans

Elicit

Find research papers, extract structured evidence, and build AI-assisted reports and systematic literature reviews.

ResearchFree Basic; paid Plus, Pro and Scale

BuseyBench

BuseyBench compares AI models on a repeatable Gary Busey portrait prompt, with visible SVG outputs, run metadata, and a published scoring method.

ImageResearchFree public benchmark

Cody

Cody is an artificial intelligence (AI) tool that operates like an employee trained on a custom-created business knowledge base.

ProductivityResearchLegacy plan details; verify current access with Sourcegraph

DeepSeek

DeepSeek provides a free AI chat experience and low-cost developer APIs for reasoning, coding, long-context analysis, structured output, and tool-enabled applications.

AI AssistantsCodingFree chat; usage-based API

Gauth

Get step-by-step explanations for math and other school subjects, with limited free access and a paid Plus option.

ResearchFree limited access; Plus subscription varies by region

Gliglish

Gliglish provides AI-guided speaking practice, role-plays and language feedback, with a limited daily free plan and monthly or annual Plus subscriptions.

ResearchFree; Plus $29/mo or $192/yr

Gong

Revenue intelligence from sales calls and emails.

ResearchPaid plans

GPTZero

Check writing for possible AI-generation signals and review authorship, plagiarism, and writing-process evidence.

ResearchFree scan; paid plans and team pricing vary

Grok

Grok is xAI’s assistant for real-time web and X research, writing, coding, voice, image and video generation, automations, and longer autonomous tasks.

AI AssistantsCodingFree; paid SuperGrok plans

Humata

Humata is a document-question-answering workspace for teams that need cited answers across uploaded files, with free, professional and team plans.

ProductivityResearchFree; Expert $9.99/mo; Team $49/user/mo

Knowt

Create and study flashcards from notes, PDFs, slides, and other class material, with optional premium AI features.

ResearchFree study tools; paid Ultra and school plans