Fivetran Database Replication vs Google Cloud Datastream

Fivetran Database Replication copies data from databases into cloud data warehouses, databases, online data platforms, and data lakes. It is designed for large workloads and offers fully managed SaaS deployment or hybrid deployment, where selected pipelines run in the customer's secure environment under Fivetran's cloud control plane. Replication methods include log-based, timestamp-based, trigger-based, and log-free change data capture. Listed sources include Oracle, SQL Server, MongoDB, PostgreSQL, Db2 for i, MariaDB, MySQL, SAP ERP, and Cosmos DB. Updates are replicated incrementally in merge batches, with sync intervals configurable from every minute to every 24 hours. Users can exclude schemas or tables, and usage pricing counts inserted and updated rows but not unchanged rows or initial bulk loads. The free plan is listed at free, with limits for connection and activation rows and model runs. Database connectors include a 14-day trial with free historical sync. Enterprise connectors and hybrid deployment are limited to Enterprise and Business Critical plans.

Google Cloud Datastream is a serverless change data capture and replication service for synchronizing data. Streams can capture ongoing updates and backfill historical records, while the service scales automatically without resources for users to provision or manage. Supported destinations include BigQuery, Cloud Storage, and Apache Iceberg tables. Documented sources include Oracle, MySQL, PostgreSQL, AlloyDB, SQL Server, MongoDB, Spanner, Salesforce, ServiceNow, Workday, and Microsoft Dataverse; some sources are marked as preview. Datastream can work with Dataflow templates to load data from Cloud Storage into destinations including BigQuery, Cloud SQL, and Spanner. Connectivity options include IP allowlisting, a forward SSH tunnel, and private connectivity over VPC peering. Processing is charged, idle streams incur no cost, and other Google Cloud resources are billed separately. The free tier includes 100 GiB of eligible CDC data per month per billing account. Events are delivered at least once, but ordering is not guaranteed. Datastream is administered through the Google Cloud console, CLI, or REST API.