Two-way sync
Changes in Couchbase or DuckDB instantly reflect in both systems. No stale data, no manual imports.
Keep Couchbase and DuckDB in sync without custom scripts. Cut weeks of integration work, eliminate silent data drift, and give your team a single, reliable source of truth.
Two databases that must agree is one of the oldest problems in engineering: different engines for different workloads, separate services with overlapping reference data, a migration in flight, or regional instances that share a subset of records. Hand-rolled replication across systems means change capture, conflict handling, and type mapping, all built and maintained by your team.
Stacksync syncs tables or collections between Couchbase and DuckDB continuously and bi-directionally, translating types between the two engines and resolving conflicts by rules you configure. Rows written on either side appear on the other within seconds.
Services that own separate databases stay consistent on the records they share, without a custom replication layer.
Mirror selected tables to another region or environment continuously, filtered to just the rows that should travel.
Keep the same dataset live in both Couchbase and DuckDB, so each workload runs on the engine that suits it.
Representative objects on each side — any object or custom field can map to any target. Schemas are auto-detected; types are converted between the two systems.
| Couchbase objects | DuckDB objects | |
|---|---|---|
| Global Secondary Indexes Indexes that make SQL++ query-based extraction efficient. | Tables Columnar tables created via SQL; the destination for materialized sync data. | |
| XDCR replications Cluster-to-cluster replication streams, useful context when choosing a sync source cluster. | Views SQL views used to shape or filter data for downstream consumers. | |
| Full-text search indexes Search indexes over documents, relevant when syncing searchable content. | External files (Parquet/CSV/JSON) Files DuckDB queries in place without loading, common as a sync interchange format. | |
| Buckets Top-level data containers, roughly analogous to a database, that scope replication and memory quotas. | Attached databases Additional database files or external systems attached into one session for cross-source queries. | |
| Scopes Namespaces inside a bucket used to group collections, similar to schemas. | Database files Single-file .duckdb databases that jobs read and write directly on disk or object storage. | |
| Collections Table-like groupings of documents that syncs typically map one-to-one to destination tables. | Schemas Namespaces within a database used to organize tables in sync outputs. |
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Couchbase–DuckDB connection.
Changes in Couchbase or DuckDB instantly reflect in both systems. No stale data, no manual imports.
Trigger automated workflows whenever Couchbase or DuckDB data changes, update records, fire webhooks, or kick off sequences without brittle API scripts.
Handle millions of events per minute without losing a single Couchbase or DuckDB record.
Track your Couchbase ⇄ DuckDB sync health, view errors, and replay failed events in one click.
Transform legacy EDI complexity into simple database interactions between Couchbase and DuckDB.
Configure and sync within minutes, no code. Whether you sync 50k or 100M+ records, Stacksync handles the queues, infra, and plumbing. Integrations are non-invasive and need zero setup on your systems.
Authenticate Couchbase and DuckDB with each platform's native method — OAuth, API keys, or service accounts — plus secure options like SSH tunneling, IP whitelisting, and VPC peering.
Pick the Couchbase and DuckDB objects to sync — Stacksync auto-detects both schemas, including custom fields where the platform exposes them. Sync to existing tables, or let Stacksync create new ones with ideal data types.
Fields map automatically even when names and types differ. Stacksync handles transformation and type casting for you, zero configuration required.
Yes. Stacksync provides a managed, real-time two-way integration between Couchbase and DuckDB: authenticate both systems, choose the objects to sync (such as Couchbase's Global Secondary Indexes and XDCR replications), map fields visually, and changes propagate both ways in milliseconds — no code required.
Couchbase: Data is organized as buckets, scopes, and collections, a database/schema/table-like hierarchy introduced in Couchbase Server 7.0. DuckDB: Concurrency is single-writer: one process holds write access to a database file at a time, which shapes how sync jobs schedule writes. Stacksync's field mapping accounts for these differences between Couchbase and DuckDB without custom code.
Stacksync is SOC 2 Type II and ISO 27001 certified with HIPAA BAA support. Data is encrypted in transit, and a zero-persistent-storage architecture means Couchbase and DuckDB records are not retained after a sync operation.
Stacksync pricing is usage-based and starts at $1,000/month, including the managed Couchbase and DuckDB connectors, real-time two-way sync, monitoring, and support. That replaces building and maintaining a custom Couchbase–DuckDB integration in-house.
Yes — Stacksync ships production-grade connectors for both Couchbase and DuckDB. The connectors handle authentication, schema detection, rate limits, and retries; you configure the sync, and Stacksync operates it.
Change detection on Couchbase: Database Change Protocol (DCP) streams document mutations; SQL++ polling on document fields as an alternative. On DuckDB: Polling or full re-reads; no change feed or transaction log API. Each detected change propagates to the other side in milliseconds, with field-level conflict resolution and an inspectable event log.
As a data company, we understand the importance of keeping your data secure. Stacksync is built with security best practices to keep your data safe at every layer, and is DPF-certified for US, EU, UK and CH data transfers.
Let your users access Stacksync from your centralized user management systems. Works with Okta, Azure, Google SSO and more.
Immediately get alerted about record syncing issues over email, Slack, PagerDuty and WhatsApp. Resolve issues from a centralized dashboard with retry and revert options.
Securely connects to your systems with:
Every pair below is a real-time, two-way sync. Search all 386 integrations available for Couchbase and DuckDB.