Jitsu is an open-source Segment alternative with event collection and API connectors. It can stream and collect the data to any data warehouse of your choice and can be deployed in 2 minutes.
Looking beyond Jitsu for real-time data collection? Try Polytomic to sync any data across tools, or Hasura for a universal GraphQL API over your sources. Prefer less ETL? Peaka goes Zero-ETL, while Nango speeds up shipping 500+ integrations.