ELT & data integration · Estuary Technologies

Estuary Flow

Real-time data integration platform that unifies batch ELT and streaming CDC pipelines with sub-second latency.

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Estuary Flow treats batch and streaming data movement as the same underlying primitive: captures land continuously in an internal, replayable data store, and both batch-style loads and low-latency streaming materializations are derived from that store rather than run as separate pipeline types. This lets a single pipeline feed a warehouse on a schedule and a real-time system simultaneously without duplicating extraction logic. It offers 200+ managed connectors, log-based CDC for databases, and a free developer tier for evaluation, with paid usage billed by data volume plus a per-connector fee. Estuary competes with Airbyte and Fivetran on connector breadth but differentiates on real-time/CDC-first architecture rather than treating streaming as an add-on.

At a glance

Vendor Estuary Technologies
Pricing model Usage-based
Free tier Yes
Deployment Cloud
Open source No
Best for Teams needing a single pipeline that serves both real-time streaming and scheduled warehouse loads.

Pricing

Billed by data volume moved (per GB) plus a flat monthly fee per active connector, with a free Developer tier and volume discounts.

Plan Price Notes
Developer $0/month 10 GB/month, up to 2 concurrent connector instances, no credit card required
Cloud $0.50/GB + $100/connector/month 200+ managed connectors, unlimited users, standard support; 30-day free trial; save 50% on 6+ connectors
Enterprise Contact sales Volume discounts, SOC 2 and HIPAA compliance, SSO, custom SLAs

Prices read from the vendor's own page on September 21, 2026. Vendors change prices; check the source before you budget.

Features

  • Unified batch and streaming pipeline model
  • 200+ managed connectors
  • Log-based change data capture
  • Sub-second latency streaming materializations
  • Replayable internal data store
  • SOC 2 and HIPAA compliance (Enterprise)
  • Schema inference and evolution handling

Integrations

Profile last reviewed September 21, 2026

Alternatives

Airbyte Open-source data movement platform with 600+ connectors, run self-hosted for free or as managed Airbyte Cloud. Fivetran Managed ELT platform with 700+ prebuilt connectors that automatically syncs source data into a cloud warehouse or lake. Meltano Open-source, code-first ELT framework built on the Singer specification, with an optional managed Meltano Cloud. Rivery Cloud ELT platform combining ingestion, orchestration and reverse ETL, billed by consumption of River Data Units (RDU/BDU credits).

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Terms to know

ELT (extract, load, transform) A data integration pattern that loads raw data first and transforms it afterward using the warehouse's own compute. ETL (extract, transform, load) A data integration pattern that transforms data before loading it, unlike ELT which transforms after loading. Change data capture (CDC) A technique for detecting and streaming only the rows that changed in a source system, instead of reloading everything. Data pipeline The automated sequence of steps that moves data from source systems to a destination, transforming it along the way. Health Insurance Portability and Accountability Act (HIPAA) The U.S. law that sets privacy and security rules for protected health information handled by healthcare providers and insurers.

Related guides

How to choose an ELT tool ELT tools differ less on connector count than on who operates them, how pricing scales, and whether transformation happens in the tool or downstream.