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flatbuffers

v25.12.19 Growing

Official FlatBuffers Rust runtime library.

Apache-2.0 Edition 2018 MSRV 1.51
Data structuresEncodingMemory management #serialization#zero-copy#flatbuffers

Quick Verdict

  • Stable API (25.x for 10+ years)
  • Massive adoption (2.8K crates depend on it)
  • Team maintained (4 owners)
  • Tiny footprint (27KB, 3 deps)
  • Permissive license (Apache-2.0)

Security

Checking security advisories...
Downloads
84.6M
Dependents
2.8K
Releases
33
Size
27KB

Deep Insights

📊
Stable downloads

5.8M downloads in the last 30 days (192.2K/day). Volume is roughly flat compared to the previous period.

🔗
Widely adopted

2.8K crates depend on flatbuffers. Strong ecosystem adoption means battle-tested code and long-term stability.

👥
Team maintained

This crate is maintained by a team (4 owners), reducing bus-factor risk and ensuring continuity.

Stable for 10+ years

The API has been stable (1.x) for over 10 years with 33 releases. This level of maturity means you can depend on it without worrying about breaking changes.

🪶
Minimal dependencies

Only 3 direct dependencies. Lean dependency tree means faster builds and lower supply chain risk.

📐
Compact crate

At 27KB, flatbuffers is lightweight. Small crate size correlates with focused, well-scoped functionality.

⚠️
Notable yanked versions

18% of releases have been yanked. Check version history before pinning.

🌟
Used by top crates

Notable dependents include arrow-ipc, re_types_builder, adblock, rten, nostr-database. When high-quality crates choose flatbuffers, it's a strong quality signal.

Health Breakdown

Maintenance 10/25

Recency, release consistency, active ratio

Quality 18/25

Yanked ratio, deps, size, maturity, features

Community 20/20

Reverse deps, ownership, ecosystem

Popularity 8/15

Downloads, momentum, growth trend

Documentation 11/15

Docs, repo, license, metadata

Download Trend

Daily downloads · last 90 days
168K/day avg-41%
0100K200K4/265/146/16/197/77/24

Top Dependents

Version Adoption

v25.2.10
24%
v23.5.26
22%
v24.12.23
21%
v25.12.19
21%
v24.3.25
12%

Release Timeline

10 releasessince 2023
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2023
3
2024
2
2025
5
2026
Less
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Feature Flags

default =["std"]

std*serialize

README

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Maintainers

Dependencies
3
direct dependencies
Dependents
2.8K
crates depend on flatbuffers

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