Best Datadog LLM Observability Alternatives in 2026
The top Datadog LLM Observability alternatives are LangSmith, Langfuse and Arize AX: 15 llm monitoring our editors would look at instead of Datadog LLM Observability, in our ranking order.
Datadog LLM Observability: LLM tracing and evaluation with Datadog context, plus a free plan and cloud-only deployment. Where it falls short: cloud-only deployment.
Switching from Datadog LLM Observability? For most llm monitoring buyers the best Datadog LLM Observability alternative is LangSmith, built for teams building and monitoring LLM applications and agents. On a budget, Opik starts at $19/mo, against $160/mo for Datadog LLM Observability.
Why People Look for a Datadog LLM Observability Alternative
- Cloud-only deployment
- Free and Pro plans both retain traces for 15 days
- Pro costs $160/month with annual billing; extra spans are metered
- Paid from $160/mo — Opik is $19/mo
Quick Picks by What You Need
- Best overallLangSmith9.3
Teams building and monitoring LLM applications and agents
Visit LangSmith - Lowest priceOpik8.6
Paid plans from $19/mo
Visit Opik - Best free optionLangSmith9.3
Has a free plan
Visit LangSmith
All 15 Datadog LLM Observability Alternatives, Ranked
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
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Best forTeams building and monitoring LLM applications and agents
- Better than Datadog LLM Observability:
- Paid from: $39/mo vs $160/mo
- Editor score 9.3 vs 9.1
Broad LLM tracing and evaluation, with cloud, hybrid, and self-hosted options.
- Evaluation support
- LLM tracing
9.3/10★★★★★Visit LangSmith -
Best forTeams seeking open-source, full-stack observability
- Better than Datadog LLM Observability:
- Paid from: $29/mo vs $160/mo
Trace LLMs, agents, retrieval, evaluations, prompts, and costs in cloud or self-hosted deployments.
- Evaluation support
- LLM tracing
8.9/10★★★★☆Visit Langfuse -
Best forTeams needing RAG diagnostics and agent evaluations
- Better than Datadog LLM Observability:
- Paid from: $50/mo vs $160/mo
A broad monitoring toolkit with RAG diagnostics, agent evaluations, and a free tier.
- Evaluation support
- LLM tracing
8.8/10★★★★☆Visit Arize AX -
Best forTeams monitoring LLM apps and agent behavior
- Better than Datadog LLM Observability:
- Paid from: $60/mo vs $160/mo
Trace LLM apps and agents, evaluate outputs, and monitor cost and safety signals.
- Evaluation support
- LLM tracing
8.7/10★★★★☆Visit W&B Weave -
Best forTeams prioritizing open-source tracing and evaluation
- Better than Datadog LLM Observability:
- Paid from: $19/mo vs $160/mo
Trace and evaluate LLM applications in the cloud or on your own infrastructure.
- Evaluation support
- LLM tracing
8.6/10★★★★☆Visit Opik -
Best forTeams wanting free, self-hosted LLM observability
A free, self-hostable stack for tracing, evaluating, and iterating on LLM applications.
- Evaluation support
- LLM tracing
8.5/10★★★★☆Visit Arize Phoenix -
Best forTeams needing a model gateway with observability
- Better than Datadog LLM Observability:
- Paid from: $79/mo vs $160/mo
A model gateway paired with tracing, prompt workflows, evaluations, and cost analytics.
- Evaluation support
- LLM tracing
8.4/10★★★★☆Visit Helicone -
Best forTeams focused on evaluation-led production quality
A quality-focused platform linking LLM evaluations, production traces, and regression gates.
8.3/10★★★★☆Visit Braintrust -
Best forTeams needing safety checks and CI/CD evaluation gates
- Better than Datadog LLM Observability:
- Paid from: $100/mo vs $160/mo
Galileo pairs production tracing with safety evaluations, guardrails, and CI/CD gates.
8.2/10★★★★☆Visit Galileo -
Best forTeams needing drift alerts and CI/CD evaluation
Trace, evaluate, and monitor LLM applications and agents across development and production.
- Evaluation support
- LLM tracing
8.1/10★★★★☆Visit HoneyHive -
Best forTeams needing simulation and OpenTelemetry-native traces
A broad monitoring toolkit for teams that need simulation and OpenTelemetry-native traces.
- Evaluation support
- LLM tracing
8.0/10★★★★☆Visit LangWatch -
Best forTeams prioritizing routing, fallbacks, and analytics
Routing, fallbacks, and request analytics are central to Portkey’s LLM gateway.
7.9/10★★★★☆Visit Portkey -
Best forTeams debugging agent runs with searchable traces
- Better than Datadog LLM Observability:
- Paid from: $30/mo vs $160/mo
Searchable traces, failure signals, and evaluations for debugging agent runs.
- Evaluation support
- LLM tracing
7.8/10★★★★☆Visit Laminar -
Best forTeams wanting free tracing with vector database visibility
Free tracing spans LLMs, agents, sessions, and vector databases.
7.7/10★★★★☆Visit Traceloop -
Best forTeams building on MLflow who self-host
Open-source tracing and quality evaluation for teams running LLM apps on MLflow.
- Alerts
- Evaluation support
- LLM tracing
7.6/10★★★★☆Visit MLflow
Datadog LLM Observability Alternatives: Common Questions
What is the best alternative to Datadog LLM Observability?
LangSmith: #1 in our Llm Monitoring ranking, with an editor score of 9.3 out of 10. Broad LLM tracing and evaluation, with cloud, hybrid, and self-hosted options.
Is there a free alternative to Datadog LLM Observability?
Yes. LangSmith, Langfuse, Arize AX, W&B Weave and Opik have a free plan or a free tier (15 of the 15 alternatives on this page).
What is the cheapest paid alternative to Datadog LLM Observability?
Of the alternatives here that publish a price, Opik starts lowest, at $19/mo.
Why do people look for Datadog LLM Observability alternatives?
Cloud-only deployment; Free and Pro plans both retain traces for 15 days; Pro costs $160/month with annual billing; extra spans are metered.
How do I switch from Datadog LLM Observability?
Export your data from Datadog LLM Observability (most tools have an export in their settings). Sign up for the alternative; start on its free plan or trial if it has one. Import your export and set up the integrations your team relies on. Run both side by side for a short while, then cancel Datadog LLM Observability.
How to Switch from Datadog LLM Observability
- Export your data from Datadog LLM Observability (most tools have an export in their settings).
- Sign up for the alternative; start on its free plan or trial if it has one.
- Import your export and set up the integrations your team relies on.
- Run both side by side for a short while, then cancel Datadog LLM Observability.
Datadog LLM Observability vs Each Alternative
| # | Tool | Free plan | Paid from | LLM tracing | Evaluation support | Deployment options | Score |
|---|---|---|---|---|---|---|---|
| 2 | Datadog LLM Observability | Yes | $160/mo | Yes | Yes | Cloud | 9.1 |
| 1 | LangSmith | Yes | $39/seat/mo | Yes | Yes | Both | 9.3 |
| 2 | Langfuse | Yes | $29/mo | Yes | Yes | Both | 8.9 |
| 3 | Arize AX | Yes | $50/mo | Yes | Yes | Both | 8.8 |
| 4 | W&B Weave | Yes | $60/mo | Yes | Yes | Both | 8.7 |
| 5 | Opik | Yes | $19/mo | Yes | Yes | Both | 8.6 |
| 6 | Arize Phoenix | Yes | Free | Yes | Yes | Both | 8.5 |
| 7 | Helicone | Yes | $79/mo | Yes | Yes | Both | 8.4 |
| 8 | Braintrust | Yes | $249/mo | Both | 8.3 | ||
| 9 | Galileo | Yes | $100/mo | Both | 8.2 | ||
| 10 | HoneyHive | Yes | Yes | Yes | Both | 8.1 | |
| 11 | LangWatch | Yes | €29/seat/mo | Yes | Yes | Both | 8.0 |
| 12 | Portkey | Yes | 7.9 | ||||
| 13 | Laminar | Yes | $30/mo | Yes | Yes | Both | 7.8 |
| 14 | Traceloop | Yes | 7.7 | ||||
| 15 | MLflow AI Monitoring | Yes | Free | Yes | Yes | Self_hosted | 7.6 |
Head-to-Head
- Datadog LLM Observability vs LangSmith
- Datadog LLM Observability vs Langfuse
- Datadog LLM Observability vs Arize AX
- Datadog LLM Observability vs W&B Weave
- Datadog LLM Observability vs Opik
- Datadog LLM Observability vs Arize Phoenix
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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