kitio.aiLangSmith vs Plexe
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. LangSmith starts at $39/mo and Plexe starts at See pricing page. 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
- Evals and observability
- Guardrails
- Agents
- Memory
- Model building
- VPC deployment
| Feature | LangSmith | Plexe |
|---|---|---|
| Best for | Tracing, evaluation and deployment platform for LLM agents | Enterprise platform for building and running production AI |
| Category | Models & APIs | Models & APIs |
| Pricing model | Freemium | Paid |
| Starting price | $39/mo | See pricing page |
| Free plan | Yes | No |
| Made by | LangChain | Plexe |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
|
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Pricing compared
LangSmith starts at $39/mo and Plexe starts at See pricing page. 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
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
Plexe
- Runs inside your cloud
- Includes evals and guardrails
- SOC 2 Type 2
- Enterprise sales process
- No public pricing
- Not aimed at hobby projects
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 Plexe if you want:
- Runs inside your cloud
- Includes evals and guardrails
- SOC 2 Type 2
Watch out: enterprise sales process.
LangSmith vs Plexe FAQ
What is the difference between LangSmith and Plexe?
LangSmith: Tracing, evaluation and deployment platform for LLM agents. Plexe: Enterprise platform for building and running production AI. Both are models & apis tools.
Is LangSmith or Plexe cheaper?
LangSmith starts at $39/mo and Plexe starts at See pricing page. Check both pricing pages for current plans.
Do LangSmith and Plexe have free plans?
LangSmith: Yes. Plexe: No.
Who makes LangSmith?
LangSmith is made by LangChain, based in United States.
Who makes Plexe?
Plexe is made by Plexe.
Which should I choose, LangSmith or Plexe?
Choose LangSmith if you value detailed agent traces and strong langgraph integration. Choose Plexe if you value runs inside your cloud and includes evals and guardrails.