LangSmith vs Langfuse vs Braintrust Pricing: 2026 Cost Breakdown
LangSmith vs Langfuse vs Braintrust pricing for 2026: what each vendor meters, every plan and overage rate, and modeled monthly bills at 20k, 100k, and 1M agent runs.
AgentStack Observability Desk
The Observability Desk covers how teams see inside AI agents once they ship: tracing, monitoring, alerting and token-cost control. Every roundup is built from hands-on setup notes, public docs and pricing pages, and is updated as tools change. Desk bylines are written and edited by the AgentStack editorial team.
7 Best Langfuse Alternatives in 2026 for Tracing and Evals
Compare 7 Langfuse alternatives for tracing and evals in 2026: Opik, LangSmith, Braintrust, Phoenix/AX, W&B Weave, Datadog, and Maxim, with pricing, OTel, migration, and who should stay.
Arize Phoenix vs Langfuse vs Helicone: Which to Self-Host in 2026?
Compare Arize Phoenix vs Langfuse vs Helicone for self-host in 2026: ELv2 vs MIT vs Apache-2.0, Docker footprints, OpenInference vs SDK vs proxy, cloud prices, and who should pick which.
8 Best Open Source LLM Observability Tools You Can Self-Host in 2026
Compare 8 open source LLM observability tools you can self-host in 2026, including Langfuse, Opik, Phoenix, Helicone, LangWatch, Agenta, Laminar, and OpenLIT, on license, OTel, Docker, and cost.
8 Best LangSmith Alternatives in 2026, Including Open Source
The 8 best LangSmith alternatives for 2026, compared on self-hosting, licence, tracing, evals, and price, with a same-workload cost table and a step-by-step plan to migrate off LangSmith.
Langfuse vs LangSmith vs Braintrust: Agent Tracing and Evals Compared
Langfuse vs LangSmith vs Braintrust compared on tracing, evals, alerts, hosting, and pricing, with a worked cost example for 50,000 agent runs a month.
AgentOps in 2026: The Complete Map of Observability and Eval Tools
A five-layer map of the 2026 AgentOps market, with 13 tools for instrumentation, observability, evals, gateways, and guardrails, plus pricing, licenses, and ownership changes.
12 Best AI Agent Observability Tools in 2026: Tracing to Alerts
We compared 12 AI agent observability tools on tracing, OpenTelemetry, evals, alerts, cost tracking, self-hosting, and pricing, with sourced prices as of October 2026 and a pick for every team type.