The Showdown
LangSmithvspromptfoo
Why pay monthly fees for LangSmith when you can self-host promptfoo for free? Let's look at the facts.
VS
LangSmith
The Expensive Option
- Closed Source (Black box)
- Expensive monthly fees per user
- Data stored on their servers
WINNER
promptfoo
The Freedom Choice
- 100% Open Source Code
- Free forever (Self-hosted)
- You own your data completely
Interactive Calculator
Calculate Your "SaaS Tax"
SaaS pricing is designed to scale with your success.
See how much wealth transfers from your bank account to LangSmith's shareholders.
10 people
150100200+
$
*Estimated standard pricing for LangSmith. Adjust if needed.
Estimated Annual Waste
$1,440
Monthly Burn Rate$120
5-Year Projection$7,200
Cost with Self-Hosted$0
Calculations based on 10 users at $12/mo.
Detailed Breakdown
0
Trace-based monitoring
Matrix-based testing
1
Cloud-hosted traces
Local test execution
2
Subscription + API
Free (pay only for API)