kitio.aiLangSmith vs ZenML
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. LangSmith starts at $39/mo and ZenML starts at $39/mo. Check both pricing pages for current plans.
At a glance
Best for
Category
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Agent tracing
- Datasets and evaluators
- Prompt hub
- Agent deployment
- Online monitoring
- Python pipeline orchestration
- Runs on your own infrastructure
- Agent session replay with Kitaru
- Evaluators and experiment runs
- Model and artifact control planes
- Self-hosted open source
| Feature | LangSmith | ZenML |
|---|---|---|
| Best for | Tracing, evaluation and deployment platform for LLM agents | Open-source orchestration for ML pipelines and AI agents |
| Category | Models & APIs | Models & APIs |
| Pricing model | Freemium | Freemium |
| Starting price | $39/mo | $39/mo |
| Free plan | Yes | Yes |
| Made by | LangChain | ZenML |
| Based in | United States | Germany |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
LangSmith starts at $39/mo and ZenML starts at $39/mo. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Developer
Free
- 1 seat
- 5k base traces / month, then pay as you go
- Community support
Plus
$39/mo
- Per seat
- 10k base traces / month, then pay as you go
- Access to Deployment and Engine
- Unlimited seats
Enterprise
Custom
- Self-hosted and hybrid deployment
- Custom SSO, ABAC and RBAC
- Support SLA
4 plans
Open Source
Free
- Self-hosted
- Evaluators and experiment runs
- Community support
Kitaru Cloud
$39/mo
- 3 agents and 2 seats
- 90-day session retention
- Hosted dashboard
- 14-day full-access trial
Scale
$999/mo
- 2,000 executions per month
- 3 projects
- Model and artifact control planes
- Audit logs
Enterprise
Custom
- Air-gapped deployment
- Custom limits
Prices in USD, checked Oct 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
LangSmith
- Detailed agent traces
- Strong LangGraph integration
- Works with any framework
- Per-seat pricing adds up
- Trace retention costs extra
- Self-hosting is enterprise-only
ZenML
- Apache 2.0 open source core
- Works with existing orchestrators and clouds
- Replays real sessions to test agent changes
- Flat $39 plan for Kitaru Cloud
- Scale plan starts at $999 a month
- Requires Python engineering skills
- Self-hosting means running it yourself
Which one should you choose?
Choose LangSmith if you want:
- Detailed agent traces
- Strong LangGraph integration
- Works with any framework
Watch out: per-seat pricing adds up.
Choose ZenML if you want:
- Apache 2.0 open source core
- Works with existing orchestrators and clouds
- Replays real sessions to test agent changes
Watch out: scale plan starts at $999 a month.
LangSmith vs ZenML FAQ
What is the difference between LangSmith and ZenML?
LangSmith: Tracing, evaluation and deployment platform for LLM agents. ZenML: Open-source orchestration for ML pipelines and AI agents. Both are models & apis tools.
Is LangSmith or ZenML cheaper?
LangSmith starts at $39/mo and ZenML starts at $39/mo. Check both pricing pages for current plans.
Do LangSmith and ZenML have free plans?
LangSmith: Yes. ZenML: Yes.
Who makes LangSmith?
LangSmith is made by LangChain, based in United States.
Who makes ZenML?
ZenML is made by ZenML, based in Germany.
Which should I choose, LangSmith or ZenML?
Choose LangSmith if you value detailed agent traces and strong langgraph integration. Choose ZenML if you value apache 2.0 open source core and works with existing orchestrators and clouds.