What does the Framework migration signal mean?

The Framework migration signal indicates a specific pattern of engineering acceleration. Full classification logic and the four-signal taxonomy are documented at /methodology and /signals.

Where can I find vespa-engine's historical signal data across periods?

The startup hub at /startup/vespa-engine consolidates every period of historical signal data for vespa-engine, including commit-velocity change, contributor growth, and signal classification. The free /api/signals.json endpoint exposes the same data for programmatic access.

Q4 2025 · Historical Snapshot

vespa-engine — Q4 2025 Engineering Signal

Vespa is an open-source platform for applications that need low-latency computation over large structured, text and vect

Signal — Q4 2025

In Q4 2025, vespa-engine showed -25% commit velocity change with 100 active contributors (+46% growth). Signal type: Framework migration. Ranked #11 of 15 in AI & Machine Learning for Q4 2025.

Metrics — Q4 2025

Commit Velocity (14d)

229

Velocity Change

-25%

Contributors

100

+46% growth

New Repos (30d)

Context

Sector: AI & Machine Learning (full Q4 2025 ranking)

Stage at time of snapshot: Growth

Geography: Unknown

Signal classification: Framework migration — learn what this signal means

See vespa-engine's current signal

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