DBConvert Streams vs Spanner migration tool

DBConvert Streams combines a database IDE for exploration and SQL with migration and change-data-capture streaming. One-time Load migrations and ongoing CDC replication are supported; MySQL CDC uses binlog replication and PostgreSQL CDC uses logical replication. Connectors include MySQL, PostgreSQL, Snowflake, local files, S3-compatible storage, and federated queries. Embedded DuckDB lets federated SQL join databases and file or object-storage sources in one statement. Local-file workflows handle CSV, JSON, JSONL, and Parquet, with CSV, JSONL, and Parquet listed as target formats. The software runs as a Windows, macOS, or Linux desktop application, or as Docker on a server, VPS, bare metal, or cloud VM. CDC does not need Kafka, Zookeeper, or Kubernetes; NATS is bundled in the desktop app or Docker Compose stack. It also offers an AI assistant, read-only MCP operations, and more than 80 REST endpoints. The Free plan is free and includes an IDE, viewers, extensions, and federated queries across two sources. Its CDC trial lasts seven days from the first stream and covers up to three tables.

Spanner migration tool has no write-up on Specifiction yet; its figures are above.