Trace, evaluate and improve applications
LangSmith comparison0%
vs AI engineering platform
Flowlines vs LangSmith.
Choose Flowlines to understand recurring production issues, affected users, and MCP journeys across sessions. Keep LangSmith for tracing, evaluation, and prompt workflows. Flowlines can analyze LangSmith data through read-only project polling or supported OpenTelemetry export.
Production behavior and tracing
When to choose Flowlines.
You have traces but still need to find recurring issues, affected users, and the jobs people bring to your agent or MCP.
MCP: 100 analyzed sessions/month free. No card required. See plans ›
Where LangSmith fits
Keep LangSmith for tracing, prompt workflows, datasets, and evaluations. Flowlines does not replace those development workflows.
What to test first
Connect one LangSmith project through read-only polling or supported OpenTelemetry export. Follow a recurring issue to its source sessions and affected users.
A trace explains one execution. Your product team also needs to know whether the same problem affects ten users, which job they were trying to complete, and what to fix first. Flowlines organizes production behavior around those questions.
Flowlines imports LangSmith runs through read-only API polling or receives them through OpenTelemetry export, then answers questions a single trace can't: what is not working, who is affected, which recurring intents are involved, and which production sessions share the pattern. LangSmith remains useful for traces, datasets, and online or offline evaluation.
Compare the workflow
01Primary job
+
Explain production behavior
02Trace capture
+
Native traces, runs and threads
Imports or receives traces for analysis
03Online and offline evals
+
Yes
Not an eval platform
04Cross-session analysis
+
Threads, online evals and metadata
Recurring issues, users and intents
05MCP and tool analysis
+
Traces and trajectory evaluation
Dedicated server, tool and journey views
06Investigation path
+
Trace, run and evaluator result
Issue to affected users and sessions
07Integration
+
LangSmith SDK or OTEL
Read-only polling or LangSmith OTEL export
Bottom line
Add Flowlines when reviewing traces one by one no longer tells you what to prioritize. Connect a LangSmith project, inspect recurring issues, and route the behaviors that matter to your team. Keep evaluation and prompt-development workflows in LangSmith.
Published · Updated
Sources and scope
Flowlines publishes this comparison. It compares documented workflows, not benchmarked performance. Validate your SDK, telemetry coverage, current plan limits, and data controls before choosing.
100 MCP sessions a month, free