Source: https://seerepo.com/compare/chroma-core/chroma/vs/foundry-rs/foundry
Markdown source: https://seerepo.com/compare/chroma-core/chroma/vs/foundry-rs/foundry.md
Description: chroma and foundry share 10 technologies: axum, Tokio, tower, Ratatui, crossterm, indicatif, dialoguer, schemars, tracing, and tracing-subscriber. Both are written in Rust.

# chroma vs foundry

chroma and foundry share 10 technologies: axum, Tokio, tower, Ratatui, crossterm, indicatif, dialoguer, schemars, tracing, and tracing-subscriber. Both are written in Rust.

- [chroma-core/chroma](https://seerepo.com/r/chroma-core/chroma): Search infrastructure for AI
- [foundry-rs/foundry](https://seerepo.com/r/foundry-rs/foundry): Foundry is a blazing fast, portable and modular toolkit for Ethereum application development written in Rust.

## What they share and what sets them apart

- In common: axum, Tokio, tower, Ratatui, crossterm, indicatif, dialoguer, schemars, tracing, tracing-subscriber
- Only in chroma: FastAPI, aws-sdk-s3, pgx, pq, s3, sqlx-postgres, sqlx-sqlite, arrow, sqlx, foyer, Postgres, object_store, SQLite, usearch, uvicorn, OpenAI, Rich, utoipa-swagger-ui, gorm.io/gorm, pypika, sea-query, bcrypt, github.com/aws/aws-sdk-go-v2/credentials, hf-hub, tokenizers, onnxruntime, rmcp, parquet, tree-sitter-md, validator, Pydantic, jsonschema, k8s-openapi, opentelemetry-api, opentelemetry-exporter-otlp-proto-grpc, opentelemetry-instrumentation-fastapi, github.com/pingcap/log, go.uber.org/zap, tracing-opentelemetry, github.com/rs/zerolog, google-cloud-googleapis, OpenTelemetry, boto3, go.opentelemetry.io/otel, go.opentelemetry.io/otel/metric, github.com/aws/aws-sdk-go-v2, github.com/aws/aws-sdk-go-v2/config, go.opentelemetry.io/contrib/instrumentation/github.com/aws/aws-sdk-go-v2/otelaws, go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc, go.opentelemetry.io/otel/exporters/otlp/otlptrace, go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc, go.opentelemetry.io/otel/sdk, go.opentelemetry.io/otel/sdk/metric, go.opentelemetry.io/otel/trace, kube, kubernetes, opentelemetry-otlp, psutil, @xenova/transformers, cohere-ai, ollama, Ajv, Hugging Face, together-ai
- Only in foundry: alloy-trie, anstyle, comfy-table, hkdf, rpassword, markdown, tracing-tracy

## Side by side

| | chroma | foundry |
|---|---|---|
| Size | 474,465 lines written, 886 code files | 613,747 lines written, 714 code files |
| Who writes it | 1.5% of its commits signed by AI. With Claude Code, Cursor, and Sweep | 4% of its commits signed by AI. With Amp, Claude Code, Cursor, and GitHub Copilot |
| Activity | Last push November 7, 2026, 4,542 commits, 29,650 stars | Last push November 13, 2026, 9,510 commits, 10,772 stars |
| Tests | 345 test files. 31% of its code files have a test that imports them | 251 test files. 14.6% of its code files have a test that imports them |

- Size: Lines written by people and agents, without generated ones; code files, without tests.
- Who writes it: A commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
- Activity: From GitHub and its history, on the day SeeRepo read it.
- Tests: The files that test the code, and the share of code files a test imports.

## Frequently asked questions

### Which is bigger, chroma or foundry?

foundry, with 613,747 lines written; chroma has 474,465.

The proof: [foundry-rs/foundry's code at commit b59c7b3](https://github.com/foundry-rs/foundry/tree/b59c7b37745178b4201e261e1bc6b911133aa1ea)

### Which has more GitHub stars, chroma or foundry?

chroma, with 29,650 stars; foundry has 10,772.

The proof: [chroma-core/chroma on GitHub](https://github.com/chroma-core/chroma)

### Which has more tests, chroma or foundry?

chroma, with 345 test files; foundry has 251.

The proof: [chroma-core/chroma's code at commit 1a3ac2c](https://github.com/chroma-core/chroma/tree/1a3ac2c7c623adbd03ed2508dc27b98cdf26016d)

### Which was updated more recently, chroma or foundry?

foundry: its last push was on November 13, 2026, and chroma's on November 7, 2026.

The proof: [foundry-rs/foundry's commits on GitHub](https://github.com/foundry-rs/foundry/commits)

### Which has more commits signed by AI, chroma or foundry?

foundry: an AI signed 4% of its commits, with Amp, Claude Code, Cursor, and GitHub Copilot; in chroma, 1.5%.

The proof: [the commits each tool signed in foundry-rs/foundry](https://seerepo.com/r/foundry-rs/foundry/ai)

## Sources

- chroma-core/chroma: Read on November 8, 2026, at commit 1a3ac2c (https://github.com/chroma-core/chroma/tree/1a3ac2c7c623adbd03ed2508dc27b98cdf26016d)
- foundry-rs/foundry: Read on November 13, 2026, at commit b59c7b3 (https://github.com/foundry-rs/foundry/tree/b59c7b37745178b4201e261e1bc6b911133aa1ea)

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.