AI answer engines cite the sites they can read. This is a live benchmark of 12 popular AI / agent developer tools, scored on Answer Engine Optimization readiness — valid JSON-LD structured data, crawlable server-rendered HTML, and clean metadata. Same engine that powers the free audit below. Snapshot: September 5, 2026.
Average AEO score across the set: 60/100. Higher is more answer-engine ready. 🟢 70+ 🟡 45-69 🔴 <45.
| # | Tool | AEO score | JSON-LD blocks | Critical | Warn | Info |
|---|---|---|---|---|---|---|
| 1 | Vapi | 🟡 68 | 1 | 0 | 2 | 3 |
| 2 | Weaviate | 🟡 68 | 2 | 0 | 2 | 3 |
| 3 | Together AI | 🟡 68 | 1 | 0 | 2 | 3 |
| 4 | Fireworks AI | 🟡 68 | 1 | 0 | 2 | 3 |
| 5 | Pinecone | 🟡 64 | 1 | 0 | 2 | 4 |
| 6 | LangChain | 🟡 61 | 0 | 1 | 1 | 1 |
| 7 | Hugging Face | 🟡 57 | 0 | 1 | 1 | 2 |
| 8 | CrewAI | 🟡 54 | 1 | 0 | 3 | 4 |
| 9 | Modal | 🟡 54 | 1 | 0 | 3 | 4 |
| 10 | LlamaIndex | 🟡 53 | 0 | 1 | 1 | 3 |
| 11 | Groq | 🟡 53 | 0 | 1 | 1 | 3 |
| 12 | Replicate | 🟡 49 | 0 | 1 | 1 | 4 |
Scores are automated snapshots from each site's public homepage HTML on September 5, 2026; they measure machine-readability for AI search, not product quality. A low score is an easy, constructive fix — usually adding JSON-LD.
The AEO Schema Forge audits a live URL and hands back the exact issues plus ready-to-paste JSON-LD — pay-per-call (x402 / USDC on Base, no login).
Free URL score Full audit — 0.1 USDC Get a shareable scorecard Read the AEO guide