#8 in Model Hosting & InferenceUpdated 2026-08

OpenLLMetry

by OpenLLMetry · OpenTelemetry-based tracing for LLM applications

49.1 — BenchRank score out of 100

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Pricing page

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Overview

OpenLLMetry is an Apache-2.0 licensed set of SDKs that adds OpenTelemetry tracing to LLM applications. You initialise it in a couple of lines from Python or TypeScript and mark functions as workflows; each call to an LLM or a vector database is recorded as a span. Traces can be sent to any of 25+ supported observability platforms, including Traceloop's own.

Best for: Python or TypeScript teams who want LLM traces in an observability tool they already run
Pricing: OpenLLMetry is free under Apache-2.0; Traceloop's hosted platform offers a $0/month tier up to 50K spans, with Enterprise priced on enquiry.

Strengths and trade-offs

Strengths

Apache-2.0 licensed and free to use
Connects to 25+ supported observability platforms
Python and TypeScript SDKs, started in about two lines
Built on OpenTelemetry rather than a proprietary trace format

Trade-offs

Product page documents little beyond the initial setup snippet
Traceloop's free tier keeps data for 24 hours only
Free tier stops at 50K spans/month; more means contact sales
SOC 2 and on-prem deployment are Enterprise-only

Pricing

Published plans from OpenLLMetry’s own pricing page, in USD. Usage charges and add-ons may apply on top.

OpenLLMetry pricing tiers, monthly rates in USD
Plan	Monthly	Includes
Free Forever	Freeper month	Up to 50K spans per month Up to 5 seats, 24 hours data retention Monitoring and evaluation dashboards CI/CD integration and prompt management
Enterprise	Contact sales	More than 50K spans per month, unlimited seats Custom data retention SOC 2 compliance and on-prem deployment option Dedicated Slack support

How this score is made up

Each dimension is scored out of 100 and combined into the headline score using fixed weights.

MCP support: 0 out of 100
API quality: 20 out of 100
Documentation: 90 out of 100
Agent friendliness: 60 out of 100
Pricing transparency: 85 out of 100
Changelog: 80 out of 100
Marketing site structure: 50 out of 100
Operational trust: 40 out of 100

Measured, but not part of the score

Useful to know, but not a mark for or against the product — so these do not affect the ranking.

Openness: 60 out of 100
Maintenance: 90 out of 100

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