--- title: "chromem-go vs pgvecto.rs" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/philippgille-chromem-go-vs-tensorchord-pgvecto-rs" tools: ["philippgille-chromem-go", "tensorchord-pgvecto-rs"] --- # chromem-go vs pgvecto.rs *GraphCanon updated Aug 21, 2026* ## Verdict Pick chromem-go if chromem-go is an embeddable vector database for Go that provides a Chroma-like interface with no third-party dependencies, suitable for applications needing in-memory persistence and cosine similarity search capabilities; pick pgvecto.rs if pgvecto.rs extends PostgreSQL for efficient vector searches using Rust. [chromem-go](https://github.com/philippgille/chromem-go) reports 1.0k GitHub stars, 75 forks, and 18 open issues, last pushed May 17, 2026. [pgvecto.rs](https://docs.vectorchord.ai/getting-started/overview.html) has 2.2k stars, 86 forks, and 76 open issues, last pushed Feb 26, 2025. Figures are from public GitHub metadata via [chromem-go's repository](https://github.com/philippgille/chromem-go) and [pgvecto.rs's repository](https://github.com/tensorchord/pgvecto.rs). | | [chromem-go](/tools/philippgille-chromem-go.md) | [pgvecto.rs](/tools/tensorchord-pgvecto-rs.md) | | --- | --- | --- | | Tagline | Embeddable vector database for Go with Chroma-like interface. | Scalable, Low-latency and Hybrid-enabled Vector Search in Postgres | | Stars | 1,047 | 2,183 | | Forks | 75 | 86 | | Open issues | 18 | 76 | | Language | Go | Rust | | Adopt for | Chromem-go is an embeddable vector database for Go that provides a Chroma-like interface with no third-party dependencies, suitable for applications needing in-memory persistence and cosine similarity search capabilities | pgvecto.rs extends PostgreSQL for efficient vector searches using Rust. | | Persona | - | - | | Runtime | - | - | | License | MPL-2.0 | Apache-2.0 | | Categories | Vector Databases | Vector Databases | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [chromem-go](/tools/philippgille-chromem-go.md) | [pgvecto.rs](/tools/tensorchord-pgvecto-rs.md) | | --- | --- | --- | | Maintenance | Slowing (36%) | Dormant (18%) | | Days since push | 96d | 540d | | Open issues (now) | 18 | 76 | | Stars delta | +14 (30d) | +4 (30d) | | Open issues delta | +1 (30d) | 0 (30d) | | Owner type | User | Organization | | Full report | [trust report](/tools/philippgille-chromem-go/trust.md) | [trust report](/tools/tensorchord-pgvecto-rs/trust.md) | ## Decision facts: chromem-go - **Requirements:** Min 0.5 GB RAM - **Adopt for:** Chromem-go is an embeddable vector database for Go that provides a Chroma-like interface with no third-party dependencies, suitable for applications needing in-memory persistence and cosine similarity search capabilities ## Decision facts: pgvecto.rs - **Adopt for:** pgvecto.rs extends PostgreSQL for efficient vector searches using Rust. ## Choose when ### Choose chromem-go if… - chromem-go is primarily Go; pgvecto.rs is Rust. - License: chromem-go is MPL-2.0, pgvecto.rs is Apache-2.0. - Requirements: Min 0.5 GB RAM. - Tags unique to chromem-go: chroma, cosine-similarity, embeddings, in-memory. - If you are building applications in Go and require an in-memory vector database without additional third-party libraries. ### Choose pgvecto.rs if… - pgvecto.rs is primarily Rust; chromem-go is Go. - License: pgvecto.rs is Apache-2.0, chromem-go is MPL-2.0. - Tags unique to pgvecto.rs: chatgpt, faiss, gpt, hacktoberfest. - Need integration with PostgreSQL for vector searches ## When NOT to use chromem-go - Avoid Chromem-go if you seek a traditional, disk-based persistence model as it primarily supports in-memory operations with optional persistence options. - Chromem-go is not the best choice if your application requires heavy concurrent load and large-scale data handling which might surpass the in-memory capability limits of this library. ## When NOT to use pgvecto.rs - Preferring a database system without PostgreSQL dependencies - Looking for a standalone solution, as pgvecto.rs is a PostgreSQL extension ## Common questions ### What is the difference between chromem-go and pgvecto.rs? chromem-go: Embeddable vector database for Go with Chroma-like interface.. pgvecto.rs: Scalable, Low-latency and Hybrid-enabled Vector Search in Postgres. See the comparison table for live GitHub stats and shared categories. ### When should I choose chromem-go over pgvecto.rs? Choose chromem-go over pgvecto.rs when chromem-go is primarily Go; pgvecto.rs is Rust; License: chromem-go is MPL-2.0, pgvecto.rs is Apache-2.0; Requirements: Min 0.5 GB RAM; Tags unique to chromem-go: chroma, cosine-similarity, embeddings, in-memory; If you are building applications in Go and require an in-memory vector database without additional third-party libraries. ### When should I choose pgvecto.rs over chromem-go? Choose pgvecto.rs over chromem-go when pgvecto.rs is primarily Rust; chromem-go is Go; License: pgvecto.rs is Apache-2.0, chromem-go is MPL-2.0; Tags unique to pgvecto.rs: chatgpt, faiss, gpt, hacktoberfest; Need integration with PostgreSQL for vector searches. ### When should I avoid chromem-go? Avoid Chromem-go if you seek a traditional, disk-based persistence model as it primarily supports in-memory operations with optional persistence options. Chromem-go is not the best choice if your application requires heavy concurrent load and large-scale data handling which might surpass the in-memory capability limits of this library. ### When should I avoid pgvecto.rs? Preferring a database system without PostgreSQL dependencies Looking for a standalone solution, as pgvecto.rs is a PostgreSQL extension ### Is chromem-go or pgvecto.rs more popular on GitHub? pgvecto.rs has more GitHub stars (2,183 vs 1,047). Stars measure visibility, not whether either tool fits your constraints. ### Are chromem-go and pgvecto.rs open source? Yes - both are open-source projects on GitHub (chromem-go: MPL-2.0, pgvecto.rs: Apache-2.0). ### Where can I find alternatives to chromem-go or pgvecto.rs? GraphCanon lists graph-backed alternatives at [chromem-go alternatives](/tools/philippgille-chromem-go/alternatives) and [pgvecto.rs alternatives](/tools/tensorchord-pgvecto-rs/alternatives) ([chromem-go markdown twin](/tools/philippgille-chromem-go/alternatives.md), [pgvecto.rs markdown twin](/tools/tensorchord-pgvecto-rs/alternatives.md)), ranked by typed relationship edges rather than popularity votes. ### Is there a machine-readable version of this comparison? Yes. The markdown twin at [this comparison](/compare/philippgille-chromem-go-vs-tensorchord-pgvecto-rs.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, chromem-go or pgvecto.rs? chromem-go: Slowing. pgvecto.rs: Dormant. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance. ### Where are the full trust reports for chromem-go and pgvecto.rs? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [chromem-go trust report](/tools/philippgille-chromem-go/trust); [pgvecto.rs trust report](/tools/tensorchord-pgvecto-rs/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=philippgille-chromem-go`](/api/graphcanon/graph?tool=philippgille-chromem-go) - LLM index: [/llms.txt](/llms.txt) - Full corpus: [/llms-full.txt](/llms-full.txt) _GraphCanon - The knowledge graph for AI development. https://www.graphcanon.com/_