Spanlens — AI search visibility
LLM/agent observability: a drop-in proxy for OpenAI/Anthropic/Gemini with request logging, cost tracking and agent tracing (Gantt waterfalls, critical-path analysis, LangGraph topology view) -- open-source core, self-hostable, with hosted paid tiers (Pro, Team at $149/mo for 1M requests, metered overage, Enterprise) · spanlens.io
Cited in 0 of 10 buyer queries
Rank 53 of 108 on the index · checked 2026-10-21 · every row below is a measured result, not an estimate
THE QUERIES, AND WHO GETS NAMED INSTEAD
| Buyer query | Spanlens | Named instead |
|---|---|---|
| best LLM observability tool 2026 | Not cited | Langfuse, Arize Phoenix, LangSmith, Helicone, Braintrust, Galileo |
| how do I trace an AI agent in production | Not cited | Langfuse, MLflow, Braintrust, Traccia |
| Langfuse vs LangSmith | Not cited | langfuse.com took 2 slots, langchain.com took 2 |
| alternatives to LangSmith | Not cited | Langfuse, Braintrust, Arize/Phoenix, Lunary, PromptLayer, Athina AI |
| open source self hosted llm observability | Not cited | Langfuse, Opik, OpenLIT, OpenObserve, Helicone, Arize Phoenix |
| how do I track OpenAI API costs per user | Not cited | openai-wrapi, Apify's OpenAI Cost Tracker, Paid |
| LangGraph agent tracing visualize graph execution | Not cited | Langfuse, Laminar, Braintrust, Opik, TrueFoundry, six of nine are .md twins |
| drop-in proxy to log every LLM request anthropic openai gemini | Not cited | Inworld LLM Proxy, Grepture, aiproxy-python, Chokepoint, LiteLLM |
| find the slowest step in my AI agent critical path latency | Not cited | Critical Path |
| Helicone vs Langfuse vs alternatives llm proxy | Not cited | Helicone, Langfuse, LangSmith, Arize Phoenix, Braintrust |
| *control: what is Spanlens and who makes it* | Not cited | — |
| *control: spanlens.io llm observability* | Not cited | — |
Method: queries are phrased the way a buyer would ask, run against live AI answer engines on the date shown. “Cited” means the answer named Spanlens or drew on its site as a source. The full audit behind this page also records every source domain per query.
Why Spanlens doesn't appear — and how to fix it
The full audit names the exact pages answer engines read in this category, the three cheapest gaps to close, and the pages to publish first. It exists already — it is how this score was measured.
- Request the full audit — free, no call required.
- Run the five-second technical check — whether assistants can crawl and parse your site at all.
- Fix it yourself with the AI Search Visibility Kit ($79), or have us do it for you — a $399 gap fix, a $2,000 full build, or a $250/month retainer.
Something wrong or already fixed? Re-audits are free and this page updates either way.
NEARBY ON THE INDEX
- Rapid Claw — 0 of 10
- Ref — 0 of 10
- TesterArmy — 0 of 10
- ThumbGate — 0 of 11