How to Migrate from Chroma to Zilliz Cloud

Chroma Cloud is scheduled to stop accepting writes on November 22, 2026, and serving reads on December 22, prompting users to migrate hosted workloads, while self-hosted open-source Chroma remains unaffected but can follow the same process for production scaling needs. The guide describes moving collections to Zilliz Cloud, a managed Milvus-based vector database, without re-embedding data, preserving IDs, vectors, documents, URIs, and metadata while adapting collection names and configuring the appropriate similarity metric. It offers Zilliz Cloud’s built-in Migration Service for publicly reachable Chroma deployments and the Docker-based open-source Vector Transport Service for private, local, or embedded deployments, with guidance on credentials, collection schemas, metadata fields, indexing, and avoiding duplicate imports. After migration, users should verify record counts, compare search-result overlap, and inspect record contents, then update applications to generate query embeddings locally, convert Chroma filters to Zilliz expressions, account for different cosine and inner-product score directions, and use Milvus-compatible write and delete operations. The recommended cutover process involves testing in staging, pausing Chroma writes, performing a final synchronization, confirming exact counts, deploying against Zilliz Cloud, and retaining the original Chroma system temporarily for rollback capability.

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