LangSmith alternatives
The 8 closest alternatives to LangSmith, ranked. Each does roughly the same job from a different angle.
Helicone
LLM observability and cost monitoring for production AI applications
developer-toolsapi Free tier
Langfuse
Open-source LLM observability with full self-hosting and production-ready tracing
developer-toolsopen-source Free tier
Portkey
AI gateway and observability platform: route, monitor, and control LLM API calls
developer-toolsapi Free tier
AssemblyAI
Speech-to-text API and audio intelligence platform with LLM-powered analysis via LeMUR
speech-to-textaudio-intelligence Free tier
Deepgram
Speech-to-text API and voice agent platform built for real-time low-latency applications
speech-to-textvoice-agents Free tier
Retell AI
Low-latency voice agent platform with emotion-adaptive dialogue for sales and support
voice-agentsapi From $0.07/mo
Vapi
Developer-focused voice AI platform for building production-grade voice agents via API
voice-agentsapi Free tier
Claude (web/app)
Anthropic's conversational AI with Claude 4 Opus, Sonnet, and Haiku
chat-aiconversational-agents Free + from $20/mo
Frequently Asked Questions
What is the best alternative to LangSmith?
The closest alternative to LangSmith is Helicone, llm observability and cost monitoring for production ai applications.
Why look for an alternative to LangSmith?
Common reasons people switch from LangSmith are pricing, missing integrations, or wanting an open-source option. The picks below cover those angles.