Chroma vs Arize Phoenix

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Chroma

Chroma

Open-source vector database with a managed cloud. Offers vector, keyword, and regex search with simple client libraries, usage-based pricing, and team plans for production apps.

Pricing Free / $250 per month
Category data
Difficulty Beginner
Type Web App
Status Active
A

Arize Phoenix

Open source LLM tracing and evaluation that captures spans scores prompts and outputs, clusters failures and offers a hosted AX service with free and enterprise tiers.

Pricing Free, SaaS tiers by quote
Category data
Difficulty Beginner
Type Web App
Status Active

Feature Tags Comparison

Only in Chroma

vector-dbragsearchembeddingsmanaged

Shared

opensource

Only in Arize Phoenix

llmobservabilitytracingevaluationotel

Key Features

Chroma

  • • Open-source core with identical APIs on managed Cloud
  • • Vector
  • • keyword
  • • and regex search for hybrid retrieval
  • • Usage-based pricing with a $0 starter and team plan
  • • Simple client libraries and docs for quick prototyping

Arize Phoenix

  • • Open source tracing and evaluation built on OpenTelemetry
  • • Span capture for prompts tools model outputs and latencies
  • • Clustering to reveal failure patterns across sessions
  • • Built in evals for relevance hallucination and safety
  • • Compare models prompts and guardrails with custom metrics
  • • Self host or use hosted AX with expanded limits and support

Use Cases

Chroma

  • → RAG backends for chat and agents with hybrid filters
  • → Semantic search for docs
  • → notes
  • → and support portals
  • → Product search blending vector and keywords for relevance
  • → Analytics on unstructured text with metadata slicing

Arize Phoenix

  • → Trace and debug RAG pipelines across tools and models
  • → Cluster bad answers to identify data or prompt gaps
  • → Score outputs for relevance faithfulness and safety
  • → Run A B tests on prompts with offline or online traffic
  • → Add governance with retention access control and SLAs
  • → Share findings with engineering and product via notebooks

Perfect For

Chroma

developers data engineers and platform teams building RAG search and analytics who need an OSS path and a managed cloud with predictable pricing

Arize Phoenix

ml engineers data scientists and platform teams building LLM apps who need open source tracing evals and an optional hosted path as usage grows

Capabilities

Chroma

Collections and Queries Professional
Managed Cloud Professional
Hybrid Search Intermediate
Observability and Roles Intermediate

Arize Phoenix

Spans and Context Professional
Built in and Custom Intermediate
Clustering and Search Intermediate
Hosted AX Basic

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