Respan
Nested traces for every LLM call, tool run, and agent turn
The top alternatives to Athina AI in the Observability, Prompts & Evals space, compared on features, pricing, and what they're best at.
Updated March 9, 2026
Athina is a Y Combinator-backed (YC W23) collaborative AI development platform that enables teams to build, test, and monitor AI features through an end-to-end solution from prototyping to production deployment. The platform offers comprehensive development tools including prompt management across multiple models with custom implementations, experimentation capabilities for dataset iteration, flow prototyping with programmatic execution, and multi-model support for OpenAI, Azure OpenAI, AWS Bedrock, and others. For evaluation and testing, Athina provides 50+ preset evaluations from providers like Ragas and Guardrails, custom evaluation configuration using LLM-as-a-judge and Python functions, human annotation with QA team integration, and side-by-side dataset comparison with SQL capabilities. Production monitoring features include LLM trace capture with full execution replay, continuous online evaluation, segmented analytics across prompts, models, topics, and customer segments, plus cost and latency tracking. Enterprise features include fine-grained access controls, self-hosted VPC deployment options, SOC-2 Type 2 compliance, and GraphQL API access. Athina serves notable clients including Vetted, Perplexity, Meesho, Sybill, and Siena.
Respan
Nested traces for every LLM call, tool run, and agent turn
LangSmith
Native tracing for LangChain and LangGraph
Weights & Biases
ML experiment tracking
MLflow
OpenTelemetry-based tracing for LLMs and agents
Arize AI
ML observability with LLM support
Langfuse
Tracing for LLM calls, tool runs, and agent steps
Datadog LLM
LLM monitoring within Datadog platform
Traceloop
OpenTelemetry
Helicone
HoneyHive
Prompt management
Braintrust
Experiments comparing prompts and models
Promptfoo
Patronus AI
Automated LLM evaluation platform
Phoenix
OpenTelemetry-based LLM and agent tracing
Humanloop
Portkey
Ragas
RAG-specific evaluation framework
Sentry
DeepEval
LangWatch
Multi-turn agent simulation testing
Galileo AI
LLM output quality evaluation
PromptLayer
Confident AI
DeepEval open-source evaluation framework
Maxim AI
Distributed tracing for LLM and agent apps
Opik
Agenta
Lunary
Future AGI
Multimodal evaluation (text, image, audio, video)
Parea AI
Chamber
ML infrastructure automation
Moda
Hallucination detection
Ashr
Multi-modal synthetic testing
Sentrial
Agent failure root cause analysis
Laminar
Agent tracing with a readable transcript view
OpenObserve
Logs, metrics, traces, RUM, and session replay
Fiddler AI
Agentic observability across multi-step agent workflows
AgentOps
Session replay with time-travel debugging
One platform for routing, observability, tracing, and evals across every LLM provider.
Respan lets you trace LLM and agent calls across any model or framework, A/B test prompts on production traffic, and route requests across 1,000+ models through one gateway.
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