Comparison
Quayen vs Google Cloud Datastream
Google Cloud Datastream is Google's managed CDC service. It replicates MySQL, PostgreSQL, Oracle, SQL Server and other sources into BigQuery or Cloud Storage. Quayen focuses on MySQL to BigQuery with guided setup for any host and a queryable change history.
| Quayen | Google Cloud Datastream | |
|---|---|---|
| Pricing model | Monthly active rows; initial copies and re-copies free | Per GiB processed: CDC $2.00/GiB for the first 2,500 GiB a month, lower in higher tiers; backfill free up to 500 GiB a month, then $0.40/GiB |
| How volume is measured | Distinct rows changed per month | Processed bytes, which Google notes can be 2 to 5 times the size of the source data |
| Sources | MySQL | MySQL, PostgreSQL, Oracle, SQL Server and more |
| Destinations | BigQuery | BigQuery and Cloud Storage |
| Change history | Every change kept in a separate dataset with chosen retention | Merge or append-only write modes |
| Setup guidance | Step-by-step for RDS, Aurora, Cloud SQL, Azure and self-hosted, with plain-English connection checks | Google Cloud console and documentation |
| Runs in | Quayen cloud | Your Google Cloud project |
Choose Google Cloud Datastream if
- You replicate several database engines, not just MySQL
- You want everything managed inside your Google Cloud project and billing
Choose Quayen if
- You want predictable per-row pricing rather than per-GiB processed
- Your MySQL runs outside Google Cloud and you want guided setup
- You want a queryable change history next to an up-to-date copy
Google Cloud Datastream details are based on its public documentation as of October 2026 and may have changed: Datastream pricing, Datastream for BigQuery.
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