Product coverage
Traces
Datasets
Evals
Optimise
Train
Serve
Overmind
LangSmith
LangSmith's loop ends at dataset export. Training, benchmarking, and serving the result happen in other products.
Which one fits you
Decision tree
Question 1 of 3, Is your agent in production, logging real runs?
Is your agent in production, logging real runs?
Two of the six verdicts here send you to LangSmith, and one of those is a self-hosting requirement Overmind cannot meet at all.
Product comparison
| Overmind | LangSmith | |
|---|---|---|
| Fine-tuning | LoRA or full, on Qwen, Llama, and Antares | None. Datasets export in OpenAI format |
| Model serving | Hosts your trained models, and proxies frontier ones | Proxies only. Gateway (beta) hosts nothing |
| Prompt improvement | Optimiser ships scored diffs as PRs | Playground, versioned prompts, manual iteration |
| Proof before switching | Benchmark vs your production model, held-out set | Experiments compare app versions on datasets |
| Tracing | OTLP ingest, scored on arrival | Py/TS/Go/Java SDKs, end-to-end OTel |
| Human review | Annotations that calibrate LLM judges | Annotation queues, pairwise A/B, bulk actions |
| Self-hosting | Platform is cloud. Trained weights run anywhere | Whole platform, on the Enterprise plan |
| Pricing | Free / Pro + credits. Ingest never credit-gated | Free (1 seat, 5k traces/mo); $39/seat/mo + usage |
Common questions
Is Overmind a replacement for LangSmith?
Only if you want it to be. Overmind has its own tracing and evals, so it stands alone. Teams that like LangSmith keep it for observability and use Overmind for datasets, training, benchmarking, and serving.
Does LangSmith do fine-tuning?
No. As of August 2026, LangSmith exports datasets for training in other products, and its LLM Gateway proxies inference rather than hosting models. That handoff is where Overmind starts.
Do I need LangChain to use either?
No. LangSmith traces any framework via OpenTelemetry. Overmind has no framework at all: its SDKs instrument OpenAI, Anthropic, and Gemini clients directly, and any OTel exporter can send to it.
What do they cost?
LangSmith: free for one seat and 5,000 traces a month, then $39 per seat per month plus usage units; self-hosting is Enterprise-only. Overmind: Free and Pro subscriptions plus credits, and trace ingest never draws credits. As of August 2026.