Exa
Search API for AI agents that need real-time web data, deep research, and structured content.
Freemium / API / MCP
Category
Research
AI search engines and research assistants that find, read, and cite sources and papers.
Firecrawl
Web data API for AI agents to search, scrape, crawl, and interact with live websites.
Freemium / Open source / API / MCP
Braintrust
AI observability for tracing production agents, running evals, and catching regressions before users see them.
Freemium / API / MCP
Langfuse
Open source observability and evals for AI agents, built for teams tracing, testing, and improving production LLM apps.
Freemium / Open source / API / MCP
Recall
An AI knowledge base for summarizing, organizing, and chatting with videos, podcasts, PDFs, articles, and notes.
Freemium / API / MCP
Undermind
AI co-researcher for scientific literature search, paper reading, and citation-backed research writing.
Freemium / MCP
Scite
Searches 300M+ scholarly articles for citation-backed answers and shows whether each claim is supported or disputed.
Paid / API / MCP