Database Tools
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Fauna
Freemium
Fauna is a distributed document-relational database delivered as a cloud API with a flexible data model supporting documents, relations, and graphs simultaneously. Its serverless design eliminates database operations with automatic scaling, replication, and ACID guarantees globally. FQL provides a functional query language optimised for complex relational queries on document data. Used by developers building serverless applications and JAMstack sites who want the flexibility of a document database combined with relational query power without managing database infrastructure.
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Dgraph
Freemium
Dgraph is an open-source distributed graph database designed for low-latency, high-throughput graph queries at scale. It stores data as nodes and edges enabling complex relationship queries that would require multiple JOINs in relational databases. Dgraph's native GraphQL support simplifies API development. Used by enterprises building knowledge graphs, recommendation systems, fraud detection, and social networks where understanding relationships between entities is the core application requirement that graph databases serve far more efficiently than relational alternatives.
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TimescaleDB
Freemium
TimescaleDB is an open-source time-series database built as a PostgreSQL extension combining the familiarity of SQL with high-performance time-series data storage. It automatically partitions time-series data for fast inserts and queries and includes built-in analytical functions for time-series analysis. TimescaleDB handles millions of metrics per second. Used by IoT companies, financial services, and DevOps platforms for storing and analysing sensor data, financial tick data, and application metrics where time-based queries and retention policies are primary database requirements.
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SingleStore
Freemium
SingleStore is a distributed SQL database designed for real-time analytics and transactions simultaneously in a single system. Its unified HTAP (Hybrid Transactional/Analytical Processing) architecture eliminates the need for separate OLTP and OLAP databases. SingleStore processes analytical queries on live transactional data without ETL delays. Used by financial services, retail, and SaaS companies including Uber, GE, and Priceline for applications requiring both high-speed transactions and real-time analytics on the same data without data warehouse synchronisation lag.
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DuckDB
Free
DuckDB is an in-process analytical database designed to run fast SQL queries directly on files including Parquet, CSV, and JSON without a server. It processes analytical queries on laptops at speeds comparable to cloud data warehouses for datasets up to hundreds of GBs. DuckDB integrates with Python, R, and major data science tools. Used by data analysts and data scientists for local analytical workloads, data exploration, and building lightweight analytical applications without the infrastructure overhead of traditional OLAP databases or cloud warehouses.
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Couchbase
Freemium
Couchbase is a distributed NoSQL database combining the flexibility of JSON document storage with the power of SQL-like queries through its N1QL query language. It provides built-in caching, full-text search, analytics, and eventing in a single platform. Couchbase's mobile solution enables offline-capable applications with automatic data synchronisation. Used by enterprises including Amadeus, Marriott, and United Airlines for high-performance applications requiring flexible document storage, SQL querying, and sub-millisecond response times at scale.
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Upstash
Freemium
Upstash is a serverless database platform providing Redis and Kafka as pay-per-request cloud services with zero infrastructure management. Its serverless Redis scales to zero when idle making it extremely cost-effective for low-traffic applications. Upstash Kafka provides serverless event streaming. QStash adds serverless message queuing. Used by serverless and edge application developers who need Redis caching, rate limiting, and Kafka streaming without provisioning and managing dedicated database infrastructure or paying for always-on compute.
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Amazon DynamoDB
Freemium
Amazon DynamoDB is AWS's fully managed NoSQL database delivering single-digit millisecond performance at any scale. It automatically handles partitioning, replication, and scaling without database administration. DynamoDB Streams enables event-driven architectures and DynamoDB Accelerator (DAX) provides microsecond caching. Used by millions of AWS customers including Lyft, Airbnb, and Samsung for applications requiring predictable single-digit millisecond latency at any scale — from development to handling millions of requests per second in production.
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Google Firestore
Freemium
Cloud Firestore is Google Firebase's flexible, scalable NoSQL document database for mobile, web, and server development. It synchronises data across client apps in real time and works when offline with local caching. Firestore's security rules control data access at the document level. Part of the Firebase platform alongside authentication, hosting, and cloud functions. Used by mobile developers and startups building apps requiring real-time data synchronisation, offline capability, and simple backend infrastructure without managing servers.
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ArangoDB
Freemium
ArangoDB is a native multi-model database supporting graphs, documents, and key-value data in a single engine with one query language. Its AQL query language works uniformly across all data models eliminating the need for multiple specialised databases. ArangoDB's graph capabilities handle complex relationship queries efficiently. Used by enterprises and research organisations needing to combine document storage flexibility with graph relationship traversal in applications like fraud detection, recommendation engines, and knowledge management where data relationships are as important as the data itself.
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Xata
Freemium
Xata is a serverless database platform built on PostgreSQL with a spreadsheet-like interface, branching, full-text search, and vector search built in. Its visual data editor makes database management accessible to non-technical team members. Xata's branching enables safe schema changes with database copies for testing. Built-in full-text search and vector search eliminate the need for separate Elasticsearch or vector database services. Used by development teams wanting a developer-friendly PostgreSQL platform with built-in search capabilities and a clean management interface.
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SurrealDB
Freemium
SurrealDB is a next-generation multi-model database combining relational, document, graph, and time-series data in a single platform with a SQL-like query language. It runs on-premise, in the cloud, or embedded in applications as a single binary. SurrealDB's real-time capabilities and built-in authentication eliminate the need for separate backend services. Used by developers building modern applications who want a single database that handles all their data needs — relational queries, graph relationships, and document flexibility — without maintaining multiple database systems.
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