Case study · GitHub signal → priced round
Airbyte — OSS ETL connectors to a $150M Series B at $1.5B
Airbyte's connector library proliferation led the $150M Series B at $1.5B.
At a glance
- Company
- Airbyte
- Sector
- Data engineering / ETL
- Primary repo
- github.com/airbytehq/airbyte
- Trigger window
- second half 2021
- Stars at trigger
- ~8K stars; signal in connector count
- Announced raise
- $150M Series B ($1.5B valuation) (2021-12-13)
- Lead investor
- Series B at $1.5B
- Time-to-money read
- Connector growth led the Series B by quarters
Airbyte chose breadth over depth: ship every possible connector, let the community fill gaps, and price the round on coverage. By late 2021 the connector count had crossed 100 — a measurable, growing signal of OSS adoption.
Connector-count growth is a strong leading indicator for ETL companies because each new connector reflects either internal velocity or community contribution. Either way, the signal is real.
The $150M Series B at $1.5B in December 2021 was an aggressive price; the connector-growth curve underwrote it.
Signals that would have flagged this pre-raise
- Connector count:100+ at trigger window, climbing weekly
- Community contributions:Steady community-submitted connectors
- Release cadence:Frequent tagged releases
Repositories
Frequently asked questions
Is connector-count a generalizable signal?
For ETL and integration platforms — yes. It's the closest public proxy to product surface area.
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