tokens&
For enterprises
Submit a resource
tokens&

Find tools, check provider offers, save a build plan, and share your work when you’re ready.

For buildersFor enterprises

For builders

  • Startup credits and perks
  • Agent Skills
  • Publish a project

For enterprises

  • Start free company workspace
  • Submit a tool, product, or perk

Community

  • Community
  • Newsletter
  • Events
Xin

© 2026 tokensand, LLC. All rights reserved.

  • Terms
  • Privacy
  • Security
  • Data Processing
  • Status
  1. Home
  2. Alternatives
  3. Alternatives to Kiln
Kiln logo

Best Alternatives to Kiln

Observability · 8 alternatives ranked of 36 in the category

Looking for alternatives to Kiln? These are the observability tools that score highest on adoption, reviews, benchmarks, and public code, with what separates each one from Kiln.

Langfuse logo
Langfuse

Observability· langfuse.com

Freemium

Open-source LLM engineering platform for tracing, evals, prompt management, and metrics so teams can debug and improve production AI applications.

35,164

How each alternative differs from Kiln

Ranked by adoption, review, benchmark, and repository signals. Each note below is drawn from the two products’ own catalog records, so a product with nothing to separate it from Kiln carries no note.

  1. 1

    Langfuse

    Langfuse is freemium against Kiln's open source model and carries 35k GitHub stars to Kiln's 5.2k.

  2. 2

    Helicone

    Helicone is freemium against Kiln's open source model.

  3. 3

    DeepEval

    DeepEval carries 19k GitHub stars to Kiln's 5.2k.

  4. 4

    MLflow

    MLflow carries 28k GitHub stars to Kiln's 5.2k.

  5. 5

    OpenPipe ART

    OpenPipe ART carries 11k GitHub stars to Kiln's 5.2k.

  6. 6

    Opik

Open source
Helicone logo
Helicone

Observability· helicone.ai

Freemium

Open-source AI gateway and LLM observability platform for logging, tracing, routing, evaluation, caching, and cost monitoring across model providers and agent stacks.

6,186
Open source
DeepEval logo
DeepEval

Observability· deepeval.com

Open source

Open-source evaluation framework for testing LLM apps, agents, RAG systems, and prompts with repeatable metrics, regression checks, and CI-friendly workflows.

18,508
Open source
MLflow logo
MLflow

Observability· mlflow.org

Open source

MLflow is an open-source AI engineering platform with GenAI evaluation, tracing, monitoring, and optimization workflows for agents, LLM apps, and models.

28,106
Open source
OpenPipe ART logo
OpenPipe ART

Observability· art.openpipe.ai

Open source

Agent Reinforcement Trainer for improving LLM agent reliability with GRPO-based reinforcement learning workflows.

10,770
Open source
Opik logo
Opik

Observability· comet.com

Open source

Open-source LLM observability and evaluation platform from Comet for tracing, prompt management, testing, and agent optimization.

22,295
Open source
Phoenix logo
Phoenix

Observability· arize.com

Open source

Open source AI observability and evaluation platform for tracing LLM applications, running evals, and debugging agent behavior with OpenTelemetry.

11,656
Open source
Portkey logo
Portkey

Observability· portkey.ai

Freemium

AI gateway and observability layer for routing, guardrails, caching, logging, and spend control across LLM providers behind one API.

13,102
Open source

Opik carries 22k GitHub stars to Kiln's 5.2k.

  • 7

    Phoenix

    Phoenix carries 12k GitHub stars to Kiln's 5.2k.

  • 8

    Portkey

    Portkey is freemium against Kiln's open source model and carries 13k GitHub stars to Kiln's 5.2k.