Top 11 GDPR-compliant ai tooling · prompt ops

Vellum is the highest-ranked Top 11 Vellum vs Humanloop vs PromptLayer: 11 Best Prompt Engineering & Prompt Management Tools 2026 provider holding GDPR compliance.

Why this answer

Filtered to entries that publicly document GDPR compliance (in their security page, trust center, or marketing collateral). "In progress" claims do not qualify.

Showing all 6 matches. Top 11 publishes whatever the data supports — we don’t pad lists. See the full ranked Vellum vs Humanloop vs PromptLayer: 11 Best Prompt Engineering & Prompt Management Tools 2026.

  1. #1Vellum(rank #1 in Vellum vs Humanloop vs PromptLayer: 11 Best Prompt Engineering & Prompt Management Tools 2026)

    SOC 2 Type II, GDPR

    The most complete and production-ready platform for the entire prompt lifecycle.

    Full Vellum review · Compare: Vellum vs Humanloop · Alternatives

  2. #2Humanloop(rank #2 in Vellum vs Humanloop vs PromptLayer: 11 Best Prompt Engineering & Prompt Management Tools 2026)

    SOC 2 Type II, GDPR, HIPAA

    Unmatched for model evaluation and integrating human feedback loops.

    Full Humanloop review · Alternatives

  3. #3Langfuse(rank #4 in Vellum vs Humanloop vs PromptLayer: 11 Best Prompt Engineering & Prompt Management Tools 2026)

    SOC 2 Type II, GDPR

    Best for open-source tracing and observability of complex LLM chains.

    Full Langfuse review · Alternatives

  4. #4Portkey(rank #6 in Vellum vs Humanloop vs PromptLayer: 11 Best Prompt Engineering & Prompt Management Tools 2026)

    SOC 2 Type II, GDPR

    Combines a robust AI gateway with solid prompt management tools.

    Full Portkey review · Alternatives

  5. #5Weights & Biases Prompts(rank #9 in Vellum vs Humanloop vs PromptLayer: 11 Best Prompt Engineering & Prompt Management Tools 2026)

    SOC 2 Type II, GDPR, HIPAA

    Integrates prompt management directly into the core W&B MLOps workflow.

    Full Weights & Biases Prompts review · Alternatives

  6. #6Arize AI(rank #10 in Vellum vs Humanloop vs PromptLayer: 11 Best Prompt Engineering & Prompt Management Tools 2026)

    SOC 2 Type II, GDPR, HIPAA

    A powerful observability platform for monitoring prompts in production.

    Full Arize AI review · Alternatives

Methodology: /methodology · No paid placement ever · Verified .