Data release v20260807_031925 Generated 2026-08-07 Methodology Report missing resource

Open-Source Flight Stack Field Comparison

Four open-source flight stacks are indexed; which repository fields are comparable from official metadata and which remain Unknown?

Last reviewed 8/7/2026. Data checked within the review cycle. Review cycles are documented on the Methodology page.

4 objects · 6 fields · 8 Unknown cells preserved

Scope

Field-level comparison of repository metadata recorded from the official GitHub API on 2026-08-02. No architecture, safety or performance comparison is attempted without field-level evidence.

Field-level evidence

Field PX4/PX4-Autopilot ArduPilot/ardupilot betaflight/betaflight paparazzi/paparazzi
License GitHub API repository license.spdx_id BSD-3-Clause Tier A 2026-08-02 Source GPL-3.0 Tier A 2026-08-02 Source GPL-3.0 Tier A 2026-08-02 Source GPL-2.0 Tier A 2026-08-02 Source
License status Repository record license status Inferred from GitHub API license object Tier A 2026-08-02 Source Inferred from GitHub API license object Tier A 2026-08-02 Source Inferred from GitHub API license object Tier A 2026-08-02 Source Inferred from GitHub API license object Tier A 2026-08-02 Source
Last repository activity GitHub API repository updated_at 2026-08-02T07:48:10Z Tier A 2026-08-02 Source 2026-08-02T06:49:56Z Tier A 2026-08-02 Source 2026-08-02T07:42:43Z Tier A 2026-08-02 Source 2026-07-31T13:22:42Z Tier A 2026-08-02 Source
Official site GitHub API homepage or repository URL https://px4.io Tier A 2026-08-02 Source http://ardupilot.org/ Tier A 2026-08-02 Source https://github.com/betaflight/betaflight Tier A 2026-08-02 Source http://paparazziuav.org Tier A 2026-08-02 Source
Certification status No official certification record in the indexed sources Unknown No certification evidence in the indexed sources Unknown No certification evidence in the indexed sources Unknown No certification evidence in the indexed sources Unknown No certification evidence in the indexed sources
Cross-stack compatibility No official cross-stack compatibility evidence in the indexed sources Unknown Compatibility must be verified per integration Unknown Compatibility must be verified per integration Unknown Compatibility must be verified per integration Unknown Compatibility must be verified per integration

This comparison does not rank the projects. Field values come only from the linked sources; unrecorded values remain Unknown.

Verification sequence

  1. Open each repository's GitHub API source and confirm license, activity and site values.
  2. Confirm licenses against each project's license file before redistribution.
  3. For compatibility or certification questions, treat every unverified field as Unknown and verify with the project's official documentation.

Limitations

  • This comparison records repository metadata only and does not rank the projects.
  • The stacks serve different vehicle classes and communities; the metadata alone does not indicate suitability.
  • Activity timestamps are snapshots from 2026-08-02.