Humanloop alternatives

Collaborative LLM development platform — prompt editor, evals, tracing. UK; Index Ventures + Y Combinator backed. The team joined Anthropic in 2025 and the platform shut down on 2025-09-08. Full Humanloop record →

Official migration path

Humanloop shut down: users were emailed on 2025-07-17, billing stopped 2025-07-30, and the platform and all account data were permanently deleted on 2025-09-08; the team joined Anthropic.

Move to: Langfuse or Braintrust

  1. The hosted platform is gone and its data was deleted on 2025-09-08, so new exports are no longer possible
  2. Humanloop's migration guide names Langfuse and Braintrust as alternatives for prompt management, evaluation and logging
  3. Exports taken before the shutdown with the humanloop-export tool are JSON/JSONL (Prompts, Tools, Datasets, Flows, Agents, Evaluators, versions, logs, evaluations) and may need transforming for the new platform

Sources: humanloop.com · github.com · checked 2026-10-27

Other live alternatives

  1. 1 Arize Phoenix Evaluation & observability platforms

    also in Evaluation & observability platforms

    OSS — Self-host ? Managed ? MCP ✓ ★ 12k released 2026-10-25 Elastic-2.0 Compare with Humanloop →

  2. 2 Confident AI / DeepEval Evaluation & observability platforms

    also in Evaluation & observability platforms

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 19k released 2026-10-16 Apache-2.0 (DeepEval) Compare with Humanloop →

  3. 3 Ragas Evaluation & observability platforms

    also in Evaluation & observability platforms

    OSS ✓ Self-host ✓ Managed ✓ MCP ? ★ 16k released 2026-01-13 Apache-2.0 Compare with Humanloop →

  4. 4 OpenLLMetry (Traceloop) Evaluation & observability platforms

    also in Evaluation & observability platforms

    OSS ✓ Self-host ✓ Managed ✓ MCP ? ★ 7.5k released 2026-09-29 Apache-2.0 Compare with Humanloop →

  5. 5 TruLens Evaluation & observability platforms

    also in Evaluation & observability platforms

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 3.6k released 2026-10-19 MIT Compare with Humanloop →

  6. 6 Arize AI Evaluation & observability platforms

    also in Evaluation & observability platforms

    OSS — Self-host ✓ Managed ✓ MCP ✓ released 2026-10-26 proprietary; Python SDK Apache-2.0 Compare with Humanloop →

  7. 7 Braintrust Evaluation & observability platforms

    also in Evaluation & observability platforms

    OSS — Self-host ✓ Managed ✓ MCP ✓ released 2026-10-26 proprietary; SDKs open source Compare with Humanloop →

  8. 8 OpenInference Evaluation & observability platforms

    also in Evaluation & observability platforms

    OSS ✓ Self-host ✓ Managed ✓ MCP ? ★ 1.3k released 2026-10-23 Apache-2.0 Compare with Humanloop →

Ranked by shared memory design (storage, retrieval, conflict handling, memory unit), same section and shared must-haves (open source, self-hosting, MCP), with adoption as a tie-breaker. ✓ confirmed · — no · ? not in the catalog yet. Want picks for your own requirements? Use the chooser. Checking a whole project? Check your stack.