Langfuse vs HoneyHive
Both are observability & tracing tools. Here is how they actually differ on price, billing model and deployment.
Langfuse
The open-source LLM observability default. Free, MIT-licensed, genuinely feature-complete when self-hosted - now a ClickHouse subsidiary after its January 2026 acquisition.
HoneyHive
An OpenTelemetry-based observability and evaluation platform aimed squarely at production AI agents at enterprise scale. Strong free developer tier, then a wall - everything above it is contact-sales with no published rate card.
| Langfuse | HoneyHive | |
|---|---|---|
| Category | Observability & Tracing | Observability & Tracing |
| Our rating | 5/5 | 4/5 |
| Starting price | $29/mo | Custom (contact sales) |
| Billing meter | event | event |
| Free plan | Yes | Yes |
| Free self-hosting | Yes, free | No or paid tier only |
| Best for | Teams that want an open-source observability platform they can self-host without losing features | Teams running agent-heavy production workloads who want tracing, online evaluation, annotation and experiments in one agent-focused system, and who are comfortable with an enterprise sales process rather than self-serve pricing. |
Our verdict on Langfuse
The open-source default for good reason - self-hosting is free and doesn't cripple the product, and it's dramatically cheaper than LangSmith at scale. The catch is operational, not commercial - the v3 architecture is four services now, and the migration bites. If you have the ops capacity, nothing else in the category gives you this much for free.
Full Langfuse review →Our verdict on HoneyHive
HoneyHive is a genuinely good agent observability platform with a commercial model that will filter out half its potential users before they try it. The product is strong where it counts for agents - OpenTelemetry-based tracing with session replay and multi-agent filtering, and evaluators that run automatically against live production traces rather than only offline datasets. That last capability is the one most tools leave undone, and combined with drift detection, regression alerting and CI/CD integration it forms a coherent quality loop. The free developer tier is honest, giving full features at 10,000 events a month. Above that, there is no published pricing of any kind. Everything is custom and contact-sales. For an enterprise buyer that is normal. For a team trying to compare five platforms on cost before committing engineering time, it is a wall, and it means you cannot know whether HoneyHive is competitive without entering a sales cycle.
Full HoneyHive review →Frequently Asked Questions
What is the main difference between Langfuse and HoneyHive?
Langfuse: Teams that want an open-source observability platform they can self-host without losing features HoneyHive: Teams running agent-heavy production workloads who want tracing, online evaluation, annotation and experiments in one agent-focused system, and who are comfortable with an enterprise sales process rather than self-serve pricing. Both sit in Observability & Tracing, so the decision usually comes down to billing model and deployment rather than raw capability.
Which is cheaper, Langfuse or HoneyHive?
It depends entirely on your workload shape, because they meter differently - Langfuse bills on event and HoneyHive bills on event. Published starting prices are $29/mo and Custom (contact sales) 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 Langfuse or HoneyHive?
Langfuse: Yes, free. HoneyHive: No or paid tier only. Free self-hosting means no licence fee, not no cost - you still own the infrastructure, upgrades and on-call.