Prompt management
Version, test and deploy prompts outside application code. 21 listed tools are in this category (a tool can be in several). Tables are ordered by package downloads or stars, never by payment.
Week 2026-W40 (2026-09-28 to 2026-10-04, UTC), measured 2026-10-07 20:16 UTC.
PyPI weekly downloads
| # | Tool | Package | PyPI downloads (week) | 12 weeks | vs prior week | Entry price |
|---|---|---|---|---|---|---|
| 2 | LangSmithTracing & observability | langsmithbundled | 18,866,051 | +8.1% | $39/seat/mo | |
| 3 | LangfuseTracing & observability | langfuse | 6,306,471 | +12.7% | $29/mo | |
| 4 | MLflowTracing & observability | mlflow-tracingbundled | 3,616,315 | +3.7% | Free | |
| 7 | BraintrustTracing & observability | braintrust | 1,650,096 | 0.0% | $249/mo | |
| 9 | PortkeyGateways with observability | portkey-ai | 765,740 | -26.5% | $49/mo | |
| 10 | DeepEval / Confident AIEvaluation | deepeval | 686,214 | +9.7% | $200/mo | |
| 11 | Traceloop / OpenLLMetryTracing & observability | traceloop-sdk | 455,110 | +7.6% | Contact sales | |
| 17 | Arize PhoenixTracing & observability | arize-phoenix | 161,687 | +13.6% | Free | |
| 19 | Arize AXTracing & observability | arize-otel | 84,266 | -5.1% | $50/mo | |
| 20 | OpenLITTracing & observability | openlit | 72,503 | +14.5% | Free | |
| 21 | LunaryTracing & observability | lunary | 49,317 | +22.9% | $20/seat/mo | |
| 26 | PromptLayerPrompt management | promptlayer | 23,137 | +10.5% | $49/mo | |
| 29 | AgentaPrompt management | agenta | 10,423 | +38.6% | $29/mo | |
| 33 | HeliconeTracing & observability | helicone-helpers | 4,840 | +20.7% | $79/mo | |
| 35 | HoneyHiveTracing & observability | honeyhive | 3,245 | +38.9% | Contact sales | |
| 42 | ScorecardEvaluation | scorecard-ai | 621 | +3.8% | $299/mo | |
| – | Arthur EngineEvaluation | – | SDK not mapped | $60/mo | ||
| – | Future AGIEvaluation | – | SDK not mapped | $250/mo | ||
| – | LangWatchTracing & observability | – | SDK not mapped | not published in USD | ||
| – | Maxim AIEvaluation | – | SDK not mapped | Contact sales | ||
| – | RespanTracing & observability | – | SDK not mapped | $199/mo |
npm weekly downloads
| # | Tool | Package | npm downloads (week) | 12 weeks | vs prior week | Entry price |
|---|---|---|---|---|---|---|
| 1 | LangSmithTracing & observability | langsmith | 8,568,634 | +17.4% | $39/seat/mo | |
| 2 | LangfuseTracing & observability | @langfuse/tracing | 3,268,181 | +12.2% | $29/mo | |
| 3 | BraintrustTracing & observability | braintrust | 2,046,537 | +2.7% | $249/mo | |
| 6 | PortkeyGateways with observability | portkey-ai | 280,520 | +29.2% | $49/mo | |
| 8 | Traceloop / OpenLLMetryTracing & observability | @traceloop/node-server-sdk | 147,877 | -0.2% | Contact sales | |
| 11 | Arize PhoenixTracing & observability | @arizeai/phoenix-otel | 73,285 | -37.5% | Free | |
| 12 | LangWatchTracing & observability | langwatch | 50,105 | +4.9% | not published in USD | |
| 18 | PromptLayerPrompt management | promptlayer | 6,509 | +31.4% | $49/mo | |
| 19 | HeliconeTracing & observability | @helicone/helpers | 4,098 | -2.5% | $79/mo | |
| 20 | ScorecardEvaluation | scorecard-ai | 2,117 | +2.7% | $299/mo | |
| 22 | OpenLITTracing & observability | openlit | 1,231 | -43.1% | Free | |
| 24 | HoneyHiveTracing & observability | @honeyhive/api-client | 71 | -65.0% | Contact sales | |
| 25 | RespanTracing & observability | @respan/respan | 69 | -12.7% | $199/mo | |
| 27 | Future AGIEvaluation | @future-agi/ai-evaluation | 3 | -66.7% | $250/mo | |
| – | AgentaPrompt management | – | no npm SDK | $29/mo | ||
| – | Arize AXTracing & observability | – | no npm SDK | $50/mo | ||
| – | Arthur EngineEvaluation | – | no npm SDK | $60/mo | ||
| – | DeepEval / Confident AIEvaluation | – | SDK not mapped | $200/mo | ||
| – | LunaryTracing & observability | – | SDK not mapped | $20/seat/mo | ||
| – | Maxim AIEvaluation | – | SDK not mapped | Contact sales | ||
| – | MLflowTracing & observability | – | no npm SDK | Free |
GitHub stars
| # | Tool | Repository | GitHub stars | 12 weeks | Entry price |
|---|---|---|---|---|---|
| 2 | LangfuseTracing & observability | langfuse/langfuse | 35,491 | series starts 2026-W40 | $29/mo |
| 7 | DeepEval / Confident AIEvaluation | confident-ai/deepeval | 18,682 | series starts 2026-W40 | $200/mo |
| 10 | PortkeyGateways with observability | Portkey-AI/gateway | 13,144 | series starts 2026-W40 | $49/mo |
| 11 | Arize PhoenixTracing & observability | Arize-ai/phoenix | 11,744 | series starts 2026-W40 | Free |
| 15 | Traceloop / OpenLLMetryTracing & observability | traceloop/openllmetry | 7,474 | series starts 2026-W40 | Contact sales |
| 17 | HeliconeTracing & observability | Helicone/helicone | 6,206 | series starts 2026-W40 | $79/mo |
| 20 | LangWatchTracing & observability | langwatch/langwatch | 4,923 | series starts 2026-W40 | not published in USD |
| 21 | AgentaPrompt management | Agenta-AI/agenta | 4,814 | series starts 2026-W40 | $29/mo |
| 27 | OpenLITTracing & observability | openlit/openlit | 2,829 | series starts 2026-W40 | Free |
| 29 | Future AGIEvaluation | future-agi/future-agi | 2,116 | series starts 2026-W40 | $250/mo |
| 32 | LangSmithTracing & observability | langchain-ai/langsmith-sdk | 1,069 | series starts 2026-W40 | $39/seat/mo |
| 34 | PromptLayerPrompt management | MagnivOrg/prompt-layer-library | 785 | series starts 2026-W40 | $49/mo |
| 38 | Arthur EngineEvaluation | arthur-ai/arthur-engine | 91 | series starts 2026-W40 | $60/mo |
| 39 | RespanTracing & observability | respanai/respan | 48 | series starts 2026-W40 | $199/mo |
| 40 | BraintrustTracing & observability | braintrustdata/braintrust-sdk-javascript | 28 | series starts 2026-W40 | $249/mo |
| – | Arize AXTracing & observability | – | no public repo | $50/mo | |
| – | HoneyHiveTracing & observability | – | no public repo | Contact sales | |
| – | LunaryTracing & observability | – | no public repo | $20/seat/mo | |
| – | Maxim AIEvaluation | – | no public repo | Contact sales | |
| – | MLflowTracing & observability | – | no public repo | Free | |
| – | ScorecardEvaluation | – | no public repo | $299/mo |