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The Most Accurate Web Search for AI Agents

Andi AI
The Most Accurate Web Search for AI Agents

AI agents fail when their search results are wrong. And most search results are wrong.

In independent benchmark testing, Perplexity scores 59% for accuracy. Google Gemini hit 71%, and ChatGPT managed 62%. Andi scored 87%.

When an agent chains multiple lookups — verifying a fact against a second source and pulling related context — errors at each step compound. A 30% error rate per step means the final results are completely unreliable.

Today we’re announcing two things: Andi’s new home at andiai.com, and early access to the Andi Search API.

87% accuracy starts at the index

Search “best surfboards” on any major engine and the top results are well-optimized affiliate pages recycling the same list from three other sites. The genuinely useful sources — the experienced shaper’s breakdown, the independent review with original testing — get buried. Good SEO is not the same as good content. Traditional search engines can’t tell the difference, and neither can an LLM summarizing whatever the search engine hands it.

Andi’s index, Trantora, works differently. It analyzes web content at ingestion, before it ever becomes a search result, understanding meaning, evaluating credibility, and scoring content quality across 1,400+ data points. Trantora extracts verified claims and builds a knowledge graph from authoritative sources, filtering out 40 to 50 million pages of spam and AI-generated slop daily. The result is a 14-billion-page index that surfaces the most credible and highest-quality sources, not just the best-optimized ones.

This architecture is how a team that has raised $3M outperforms competitors that have raised billions. Perplexity raised over $1.5B, yet we’re 47% more accurate, because the index itself understands meaning and evaluates source credibility. No amount of AI layered on top of SEO rankings will get there.

PCMag named Andi the #1 AI Search Engine in 2025 and rated it the Top Free AI Search Engine again in January 2026. Andi leads the field on independent accuracy benchmarks.

The Search API

We’re opening early access to the Andi Search API: the same accuracy engine, available as a REST API for developers.

The API is designed for AI agents and RAG pipelines — any system where correct retrieval from the web determines whether the output is useful or wrong. The interface is compatible with Google Custom Search and OpenSearch, so migrating from an existing search API is a minimal code change.

What the API provides:

  • 87% accuracy on independent benchmarks
  • 14 billion page index, updated continuously by Trantora
  • Under 1¢ per query at scale
  • REST API compatible with Google Custom Search and OpenSearch
  • Structured results with source attribution and relevance scoring

Six YC startups are already using the API in production. They came to us after running their own benchmarks against Perplexity, Brave, Tavily, and other search APIs, and Andi won on accuracy in each comparison. Forty-five more are on the waitlist.

Common use cases include research agents that verify facts against live web sources and RAG pipelines feeding grounded content to LLMs. In autonomous workflows especially, when the search layer returns wrong results, the final output is wrong regardless of how good the model is.

andiai.com: a site for humans and machines

We moved from andi.co to andiai.com and rebuilt the site from scratch. The old site was designed in Framer. The new one runs Astro 5 running on serverless functions, React 19 for interactive components, Tailwind CSS v4, and MDX content collections for the blog.

The technical stack makes the site as readable by AI agents as by people.

andiai.com serves content to machines through multiple channels. Content negotiation lets any client send an Accept: text/markdown header and receive clean markdown with YAML frontmatter instead of HTML. Static .md URLs give every page a markdown variant at the same path with .md appended. And llms.txt at the site root provides AI crawlers with a structured index of every page and its purpose.

curl -H "Accept: text/markdown" https://andiai.com/about
curl https://andiai.com/about.md
curl https://andiai.com/llms.txt

We built Andi to make search work for AI agents and humans equally, and designed the website the same way. All existing andi.co URLs redirect to their andiai.com equivalents, so bookmarks and links keep working.

Early access is open

We’re accepting developers and startups into the Search API early access program, with priority for teams building AI agents and RAG applications.

Apply at andiai.com/api or through the waitlist form directly.

If you’re using another search API, sign up for the waitlist and see for yourself how much better Andi’s web search results are. The six YC startups already on the API all started with head-to-head benchmarks against competitors and stayed.