Respan
Depends
Confidence: Medium
Buy if you run AI agents in production and want tracing, evals, and a gateway under one roof . start on the free tier.
Comparison
Respan vs LangSmith
Respan and LangSmith both land on Depends.
LangSmith
Depends
Confidence: Medium
Buy if your team runs real LLM agents in production and needs tracing, evals, and failure analysis at scale.
| Compare | Respan | LangSmith |
|---|---|---|
| Verdict | Depends | Depends |
| Best for | Teams running LLM agents in production | Teams shipping LLM agents to production |
| Who it's not for | Hobbyists making a few OpenAI calls | Hobby projects or simple chatbots . heavy overkill |
| Privacy | No known public vulnerabilities found in the sources reviewed.⁵ | Two critical 2026 vulnerabilities disclosed: an auth bypass (CVE-2026-25750) and an SDK deserialization flaw (CVE-2026-40190). |
| Support quality | Zero G2 reviews; unproven | No support evidence in sources |
| Public sentiment | Early reviews praise simplicity ('dead simple' per Product Hunt), but independent G2 review volume is still zero.⁸ | Users praise detailed tracing and debugging but grumble about new pricing, reliability, and ecosystem lock-in. |
| Biggest gotcha | Guess: trace and eval volume pricing on top of the $199 Team fee . model your ingestion first² | Reddit users report Plus tier in Europe makes you non-compliant |
Pick Respan when
- Teams running LLM agents in production
- Startups wanting tracing, evals, and gateway in one tool
- Multi-model apps needing routing and fallback
- Compliance-sensitive AI products (SOC 2)
When Respan is not a fit
- Hobbyists making a few OpenAI calls
- Pre-production teams without real traffic
- Small teams wanting only a cheap LLM proxy
- Buyers needing a battle-tested vendor with long track record
Pick LangSmith when
- Teams shipping LLM agents to production
- LangChain/LangGraph developers
- Agent debugging and eval workflows
- AI platform teams at scale
When LangSmith is not a fit
- Hobby projects or simple chatbots . heavy overkill
- EU teams on Plus tier with strict compliance needs
- Budget-constrained teams wanting self-hosted open source
- Apps with negligible agent traffic or no eval needs
Sources
- Respan | LLM Engineering Platformrespan.aiofficial
- Respan Pricingrespan.aiofficial
- Top 8 LLMOps Tools (Team plan $199)respan.aiofficial
- Respan on Y Combinatorycombinator.comofficial
- Compliance & privacy | Respan Docsrespan.aisecurity
- Respan Trust Centertrustcenter.respan.aisecurity
- Respan Agent Security red-teaminglinkedin.comsecurity
- Respan on Product Huntproducthunt.comreview
- Respan AI Reviews on G2g2.comreview
review
- Respan on FeaturedCustomersfeaturedcustomers.comreview
news
- How Respan scales LLM observability with ClickHouseclickhouse.comnews
- Pulse2: Respan raises $5Mpulse2.comnews
- Keywords AI rebrands to Respanlinkedin.comnews
- LangSmith Review 2026: LLM Observability, Testedaitoolsbakery.comreview