New Relic AI Monitoring vs Sentry
Both are observability & tracing tools. Here is how they actually differ on price, billing model and deployment.
New Relic AI Monitoring
LLM monitoring layered onto New Relic's APM platform, billed on data ingested - which is close to the worst possible meter for verbose agent traces. One reported deployment went from $1,400 to $12,000 a month after turning it on.
Sentry
Excellent error tracking that keeps appearing in LLM observability roundups where it does not belong. Its AI product, Seer, is a code-debugging agent billed per contributor - not an LLM tracing or evaluation platform.
| New Relic AI Monitoring | Sentry | |
|---|---|---|
| Category | Observability & Tracing | Observability & Tracing |
| Our rating | 2/5 | 2/5 |
| Starting price | $0.40/GB ingested | $26/mo |
| Billing meter | gb-ingested | event |
| Free plan | Yes | Yes |
| Free self-hosting | No or paid tier only | No or paid tier only |
| Best for | Organisations already standardised on New Relic for APM, logs, Kubernetes and SRE workflows, running relatively low-volume LLM features, who need correlation more than evaluation. | Error tracking and front-end debugging, which it does superbly. It is not the right tool for observing or evaluating LLM applications, and should be paired with one rather than substituted for one. |
Our verdict on New Relic AI Monitoring
New Relic AI Monitoring makes sense for exactly one buyer - the organisation already committed to New Relic - and is a poor choice for anyone else. The correlation story is real, and the applied intelligence and SRE agent tooling is more mature than anything the AI-native vendors offer. But two structural problems dominate. First, the billing meter is data ingested, and LLM traces are among the most verbose telemetry in existence - prompts, completions, tool payloads and retrieved context routinely make a single trace 5 to 50 KB. Charging per gigabyte for that is close to the worst possible fit, and one reported deployment saw its bill go from $1,400 to between $9,500 and $12,000 a month after AI Monitoring volumes were counted. Second, it does not evaluate anything. There is no faithfulness, relevance or hallucination scoring, and no annotation or dataset curation. It tells you what your LLM did and what it cost, not whether the output was any good. If you need evaluation, you are buying a second tool regardless.
Full New Relic AI Monitoring review →Our verdict on Sentry
We are including Sentry because it keeps appearing in LLM observability comparisons, and the most useful thing we can tell you is that it does not belong in them. Sentry is an outstanding error tracking and performance monitoring product. What it is not is an LLM observability platform. It does not do prompt and completion capture, token accounting, per-model cost attribution or output-quality evaluation in the way this category means those terms. The confusion comes from Seer, Sentry's AI product, which roundups see and file as AI observability. Seer is a code debugging agent - it looks at your errors and proposes fixes - billed at $40 per active contributor per month, where an active contributor is anyone opening two or more pull requests to a Seer-enabled repository in a billing cycle. That is a developer productivity tool, not agent observability. Run Sentry for your application errors, absolutely. Run something else for your LLM calls.
Full Sentry review →Frequently Asked Questions
What is the main difference between New Relic AI Monitoring and Sentry?
New Relic AI Monitoring: Organisations already standardised on New Relic for APM, logs, Kubernetes and SRE workflows, running relatively low-volume LLM features, who need correlation more than evaluation. Sentry: Error tracking and front-end debugging, which it does superbly. It is not the right tool for observing or evaluating LLM applications, and should be paired with one rather than substituted for one. Both sit in Observability & Tracing, so the decision usually comes down to billing model and deployment rather than raw capability.
Which is cheaper, New Relic AI Monitoring or Sentry?
It depends entirely on your workload shape, because they meter differently - New Relic AI Monitoring bills on gb-ingested and Sentry bills on event. Published starting prices are $0.40/GB ingested and $26/mo respectively, but those numbers are not comparable until you apply them to the same traffic. Use our cost calculator to model both against your own request volume and span count.
Can I self-host New Relic AI Monitoring or Sentry?
New Relic AI Monitoring: No or paid tier only. Sentry: No or paid tier only. Free self-hosting means no licence fee, not no cost - you still own the infrastructure, upgrades and on-call.