Crates / chroma
Rust crate · real downloads · data Oct 29, 2026
chroma downloads, and should you depend on it?
Client for Chroma, the AI-native cloud database. crates.io · docs.rs
Few direct dependents and losing ground.
chroma: only 3 crates name it directly; no release in the last 90 days, so its count is all steady use.
How this verdict is decided (4 rules)
- Usage: crates.io reverse dependencies (crates that list it as a dependency): 10,000+ = foundational, 1,000+ = widely used, 100+ = established, under 100 = few direct dependents.
- Direction: the median quiet day in the last 30 days of the window against the first 30, read against the median tracked crate (the whole field moved +39% from late summer to October, so a raw trend says nothing). 10%+ ahead of the field = gaining; 10%+ behind = losing ground; otherwise steady. Steady with no release in 2+ years = quiet for years.
- Release spikes: the median release-window day against the quiet-day baseline: under 1.15x = no spike, 1.15x to 1.3x = small bumps, 1.3x or more = jumps on release days.
- Release recency: days since the newest version that was not yanked, from crates.io publish times.
release window (release day + next day)quiet dayquiet-day median · download the 89 days as CSV
The numbers in one paragraphchroma got 254,200 crates.io downloads from Aug 1, 2026 to Oct 28, 2026 with no new version in that window, so every day is a quiet day: a median of 2,436 a day, about 17,052 a week. With no release spikes to remove, its whole count is the steady baseline.
What this means if you're choosing a dependency
- You rarely add this one yourself. Only 3 crates name it directly.
- Released this year. The latest version, 0.15.0, is from Jun 30, 2026 (4 months ago).
- Still pre-1.0 (0.15.0). Under Cargo's semver rules a 0.x minor bump may break you, so pin the minor version (
chroma = "0.15") and read the changelog on upgrades. - Fit check: license Apache-2.0, edition 2021 (from the latest version's manifest).
- Its raw count is a fair read. Under 1% of its downloads in the window came from release windows, so the raw number and the baseline (2,436 a day) tell the same story.
What the chart says
- Weekend quiet days ran at 41% of weekday quiet days (1,236 vs 3,012). A dip that deep is the signature of work-week CI pipelines and developers building on weekdays.
- Biggest day: 11,398 on Oct 6, 2026, a quiet day with no release nearby.
Every number
| All-time downloads | 1,634,069 (outside the crates.io top 1,000 by all-time downloads) |
| Downloads in the window | 254,200 (Aug 1, 2026 to Oct 28, 2026, 89 days) |
| Within 2 days of a release | 0 (0.0%) |
| Quiet-day median (baseline) | 2,436 a day; weekdays 3,012, weekends 1,236 |
| Release-adjusted downloads | 254,200 (release-window days capped at the baseline) |
| Baseline rank | #1242 of the 1336 crates we track |
| Quiet-day trend | -26% raw, -47% against the median tracked crate (+39%) |
| Releases in the window | 0 |
| Versions published, ever | 18 |
| Latest version | 0.15.0, published Jun 30, 2026 (license Apache-2.0, edition 2021) |
| First published | Sep 26, 2024 |
| Reverse dependencies | 3 |
How we compute this
crates.io counts every download, including CI runners, mirrors and bots that fetch each new version, so raw counts run high (why, in The Manual). We split the last 89 days into release windows (the day a version of chroma was published, plus the next day) and quiet days, and use the median quiet day as the baseline: an upper bound on steady use, never a head count. The method and data come from our study of 90 days of crates.io data from 69 crates, featured in This Week in Rust #674; check any crate live with the real-downloads checker.
Badge for your README
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Publishing a crate of your own? How to publish a Rust crate to crates.io, step by step.
Categories
Sources
- Daily downloads: crates.io API, /crates/chroma/downloads (last 90 days, all versions), fetched Oct 29, 2026.
- Versions and publish times: crates.io API, /crates/chroma/versions, same fetch.
- Reverse dependencies: crates.io reverse dependencies, same fetch. Dependency edges between tracked crates: each crate's default version, crates.io API.
- Fetched politely (one request every 2 seconds, identified User-Agent) per the crates.io data access policy. Data is crates.io's; the release-window split, baseline and verdict rules are ours, CC BY 4.0.
Up next
Next by real downloads: The next crate down the real-downloads ranking: 2,409 a day. Few direct dependents and steady.probe-rsRust crate. A collection of on chip debugging tools to communicate with microchips. Real use: 2.4K downloads a day on quiet days; 50 crates depend on it.Read it next →Also worth your time
Art: Nicholas Roerich, Nag Lake (1925). Public domain, via Wikimedia Commons.
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