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Understand the differences before you shortlist.

Cassandra×

Census×

Attribute	CassandraOpen source	CensusOther license
Overview
Primary focus	Masterless, wide-column NoSQL database built for multi-datacenter availability	Reverse ETL platform, now part of Fivetran as Activations
Deployment	Self-hosted	Not specified
Source model	Open source	Other license
Pricing model	open source	freemium
API available	Yes	Yes
Windows desktop	Not specified	Not specified
Mobile app	Not specified	Not specified
Overview	Apache Cassandra is an open-source, peer-to-peer NoSQL database that replicates data across nodes and datacenters with tunable consistency and no single point of failure.	Census was a reverse ETL platform for syncing warehouse data to business tools. Fivetran acquired Census in 2025, and getcensus.com now redirects to Fivetran, where the product continues as "Activations."
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Vendor website	Visit vendor ↗	Visit vendor ↗
ITHub profile	View full profile →	View full profile →

Primary focus: Masterless, wide-column NoSQL database built for multi-datacenter availability
Deployment: Self-hosted
Source model: Open source
Pricing model: open source
API available: Yes
Windows desktop: Not specified
Mobile app: Not specified
Overview: Apache Cassandra is an open-source, peer-to-peer NoSQL database that replicates data across nodes and datacenters with tunable consistency and no single point of failure.

Primary focus: Reverse ETL platform, now part of Fivetran as Activations
Deployment: Not specified
Source model: Other license
Pricing model: freemium
API available: Yes
Windows desktop: Not specified
Mobile app: Not specified
Overview: Census was a reverse ETL platform for syncing warehouse data to business tools. Fivetran acquired Census in 2025, and getcensus.com now redirects to Fivetran, where the product continues as "Activations."

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