Free AI research agents (2026)
AI research agents that you can use without paying: open-source projects plus tools with a free plan. Here are the top 25 of 88 from the AgentScout directory.
How we picked and ranked: tools are matched by category, the pricing each maker states and what each tool says it does. They are ranked by GitHub stars as recorded on each listing (link checks 2026-10-18); tools without a tracked repo follow, by listing maturity. No paid placements.
1. REA
MCP server and CLI that lets coding agents reverse engineer native binaries, Electron and JavaScript apps, .NET assemblies and live websites, using Ghidra, Hopper or IDA under the hood.
Pricing (as stated): Open source · Mature
2. Hermes Agent (Nous Research)
Open-source agent harness; v0.21.7 stable shipped Oct 12, v0.22.0 RCs Oct 13-14.
Pricing (as stated): Open source · Active, frequent releases
3. Agent-Reach
Lets an AI agent read and search sites like X, Reddit, YouTube and GitHub through one toolkit, without paid APIs.
Pricing (as stated): Open source · Mature
4. Crawl4AI
Open-source crawler that turns websites into clean, LLM-ready Markdown for agents and RAG pipelines.
Pricing (as stated): Open source · Mature
5. Deer Flow
ByteDance's open-source long-horizon agent harness that researches, codes and creates using sandboxes, memory and sub-agents.
Pricing (as stated): Open source · Mature
6. Career Ops
Open-source job search agent that scans job boards and scores each posting against your CV before you apply.
Pricing (as stated): Open source · Mature
7. MindsHub
MindsDB's agent workspace for research, analysis, documents and coding, with a model router, a scoped vault for connected data and swappable open-source agent harnesses.
Pricing (as stated): Open source + cloud · Mature
8. Vane
Open-source AI answering engine that searches the web and replies with sources, self-hostable.
Pricing (as stated): Open source · Mature
9. Vibe-Trading
Open-source personal trading agent for researching markets and testing strategies in natural language.
Pricing (as stated): Open source · Mature
10. ScrapeGraphAI
Python library that uses LLMs and graph logic to build scraping pipelines: describe the data you want and it extracts it from websites or documents.
Pricing (as stated): Open source + cloud · Mature
11. STORM
Stanford system that writes Wikipedia-style articles from web research.
Pricing (as stated): Open source · Research project
12. OpenCLI
Turns websites into CLI commands and lets agents use your logged-in browser.
Pricing (as stated): Open source · Mature
13. GPT Researcher
Autonomous agent that researches the web and writes cited reports.
Pricing (as stated): Open source · Mature
14. Chroma
Open-source search and vector database widely used for agent memory and RAG.
Pricing (as stated): Open source + cloud · Mature
15. DB-GPT
Open-source agentic data assistant for querying and analyzing data with LLMs.
Pricing (as stated): Open source · Mature
16. Moli
Lightweight Rust headless browser for AI agents that fetches pages, searches and extracts content, usable via CLI, CDP or WebDriver.
Pricing (as stated): Open source · Mature
17. DocsGPT
Private AI platform for agents, assistants and enterprise search with an agent builder.
Pricing (as stated): Open source + cloud · Mature
18. WrenAI
Generative BI for agents: governed text-to-SQL with a semantic context layer.
Pricing (as stated): Open source + cloud · Mature
19. Maxun
Turns websites into structured APIs with no-code robots for extraction and monitoring.
Pricing (as stated): Open source + cloud · Mature
20. DeepCode
Open agentic coding system that turns papers and specs into code with multi-agent orchestration.
Pricing (as stated): Open source · Mature
21. SurfSense
Privacy-focused, open-source NotebookLM alternative with a research agent over your sources.
Pricing (as stated): Open source · Mature
22. txtai
All-in-one Python framework for semantic search, LLM orchestration and agents built on an embeddings database of vector, graph and relational indexes.
Pricing (as stated): Open source · Mature
23. Claude Context
Zilliz MCP plugin that adds semantic code search to Claude Code and other coding agents, using your whole codebase as context.
Pricing (as stated): Open source · Mature
24. LanceDB
Open-source multimodal vector database for search, RAG and agent memory.
Pricing (as stated): Open source + cloud · Mature
25. Apify MCP Server
Apify's MCP server giving agents access to thousands of scrapers for social media, search and maps.
Pricing (as stated): Open source + cloud · Mature
FAQ
What are the best free AI research agents?
Ranked by tracked GitHub stars, the top free AI research agents in our directory are REA, Hermes Agent (Nous Research), Agent-Reach, Crawl4AI, Deer Flow. Stars measure popularity, not fit, so compare a few against your own task.
How many free AI research agents does AgentScout list?
88 tools match. This page shows the top 25. Pricing mix on this page: Open source (17), Open source + cloud (8).
Are these tools really free?
Pricing is what each maker states on their site. Open-source tools are free to self-host but may need a paid model API key or offer paid cloud plans; freemium tools have a free plan with limits. Check each official site.
Where can I see every tool for research?
Our task page lists all 146 tools we match to research.
Related: All tools for research · research (31) · MCP & infra (24) · coding (7) · browser/computer use (7)
Similar searches: Open-source AI research agents · AI research assistants (ready to use)
By role: For marketers · For researchers
All popular searches · AI agents by role · Free tools
Best-of lists: Vane alternatives · All best lists
Facts come from our directory listings; pricing is as each maker states it and can change. Check official sites before you choose.