Exa ranks pages. Authorix ranks who wrote them.
Exa retrieves semantically relevant pages and tells you nothing about who produced them. Authorix resolves the author and weighs them on the subject of what they wrote, so a byline becomes a ranking signal. We index the few per cent of the web that originates what the rest repeats, which makes us earlier to a story and far cheaper to keep current. Need every page ever published? Exa's index is wider, and the two compose well.
| Feature | Authorix | Exa AI |
|---|---|---|
| What it returns | Ranked authority profiles (JSON) | Semantically relevant web pages and content |
| Search type | Semantic authority search | Neural semantic web search |
| Authority scoring | ✓ Built-in authority ranking | ✗ Relevance scoring only, no authority ranking |
| Infrastructure | 100% EU (Hetzner Helsinki, Mistral, Weaviate) | US-based (San Francisco) |
| GDPR compliance | ✓ Full, no US API/index data transfers | ✗ US-based, requires SCCs for EU use |
| MCP support | ✓ 4 native tools | ✗ No official MCP server |
| REST API | ✓ 4 endpoints | ✓ Multiple endpoints (Search, Find Similar, Contents) |
| Free tier | $5 starter credits | 1,000 free requests/month |
| Pricing | $25/1K searches | $7/1K searches, $12/1K deep |
The best AI pipelines don't choose between content retrieval and authority verification: they use both.
What Authorix adds to your stack
Exa finds content. Authorix tells you who the ranked authorities behind that content are. Use Exa for retrieval, Authorix for source verification and attribution.
Before your AI cites a source, verify it. Pass any social handle to Authorix's match endpoint and know instantly whether they're a ranked authority or just noise. No other search API offers this.
Authorix runs on Hetzner (Helsinki, Finland), Mistral AI (Paris), and Weaviate (Amsterdam). For EU teams, this eliminates third-country transfer obligations entirely.
API comparison
Query both APIs for "AI safety experts" and compare what comes back.
curl -X POST "https://api.exa.ai/search" \
-H "x-api-key: exa_..." \
-H "Content-Type: application/json" \
-d '{
"query": "top experts on AI safety",
"numResults": 5,
"type": "neural"
}'{
"results": [
{
"title": "AI Safety: Alignment Forum",
"url": "https://alignmentforum.org/posts/...",
"score": 0.87,
"publishedDate": "2024-03-15",
"author": "Paul Christiano"
},
{
"title": "On the Importance of AI Safety Research",
"url": "https://lesswrong.com/posts/...",
"score": 0.82,
"author": null
}
]
}curl "https://api.authorix.com/api/v1/index?query=AI+safety&limit=5" \ -H "Authorization: Bearer amyg_..."
{
"duration": 0.084,
"results": [
{
"sdu": "2941...207",
"name": "Stuart Russell",
"rank": 1,
"country_name": "United States",
"topic": "AI Safety"
},
{
"sdu": "1839...561",
"name": "Paul Christiano",
"rank": 2,
"country_name": "United States",
"topic": "AI Safety"
}
]
}{
"results": [{
"name": "Stuart Russell",
"bio": "Professor at UC Berkeley. Pioneer of AI safety research, co-author of the standard AI textbook.",
"country": "United States",
"topics": ["AI Safety", "Machine Learning"],
"socials": {
"twitter": { "handle": "@stuartjrussell", "followers": 52400 },
"linkedin": { "handle": "stuart-russell-ai", "followers": 18200 }
}
}]
}Pricing comparison
$7/1K for search with contents (10 results). $12/1K for Exa Deep. 1,000 free requests/month.
Per result: a URL, a title, and extracted content. You still need to identify the author, verify their credibility, find their social profiles, and determine their authority level.
$5 in free credits on signup. No credit card required.
Per result: name, authority rank, country, identity-resolved social handles with follower counts, bio, peer network, authority score, and signal growth, as structured JSON, with no post-processing needed.
One search returns up to 25 complete authority profiles. Getting equivalent data from Exa would require additional scraping, author identification, and manual cross-referencing.
When to use which
Use Exa to find relevant content, Authorix to verify and rank the authors behind it. Your LLM gets sources with credibility scores attached, and you know you're citing real authorities, not SEO noise.
See how to build this in a RAG pipeline →No credit card required. Full API access from day one.