Open-source Firebase alternative providing real-time database, authentication, and storage for web and mobile apps.
Pricing: 0 USD · Updated 2026-09-03
dataYes. Supabase offers a free tier with generous limits; the paid Pro plan starts at $25/month (price checked 2026-09-03).
Supabase is available on Web, iOS and Android.
SQL vs NoSQL compared: how relational and non-relational databases store data, the ACID and BASE trade-offs, and how to choose between them.
What an API is, how REST APIs work over HTTP, the methods you'll actually meet — GET, POST, PUT, PATCH, DELETE — and how to read a response.
GraphQL is an open-source query language for APIs that lets clients request exactly the data they need. This guide explains how GraphQL works, its type system, queries and mutations, and how it compares to REST.
A database index is a data structure that lets a database find rows without scanning the whole table, usually a balanced tree (B-tree) ordered by the indexed columns. It makes equality, range, sort and join queries fast, at the cost of write overhead and storage. This guide explains how indexes work, clustered vs non-clustered, and when (and when not) to create one.
JSON (JavaScript Object Notation) is an open, language-independent, text-based data interchange format derived from JavaScript object syntax. It represents data as a small set of types — objects, arrays, strings, numbers, booleans, and null — and is the de facto format for web APIs, configuration files, and data exchange between servers and clients. This guide explains JSON's syntax, its data types, how it compares to XML and YAML, and how to parse and generate it.
SQL injection is one of the most common web vulnerabilities — this guide explains how it works, the main attack types, and the secure coding practices that prevent it.
A database transaction bundles several operations into one all-or-nothing unit. This guide explains transactions, the ACID properties (atomicity, consistency, isolation, durability), and isolation levels.
Event-driven architecture (EDA) is a software design pattern where components communicate by producing and detecting events. Learn how EDA works, its topologies, event sourcing, CQRS, and when to use it.
REST and gRPC are two ways to build APIs. REST uses HTTP and JSON with universal browser support; gRPC uses HTTP/2 and Protocol Buffers for binary efficiency and code-generated stubs. Compare the trade-offs and learn when to choose each.
GraphQL and gRPC are two modern ways to build APIs. GraphQL lets clients query exactly the fields they need over a single HTTP endpoint; gRPC calls typed remote methods over HTTP/2 with binary Protocol Buffers. Compare the trade-offs and learn when to choose each.
Protocol Buffers (protobuf) is Google's language-neutral, platform-neutral data serialization format. Define your data once in a .proto file, compile it, and get fast, compact binary output. Learn how protobuf works and when it outperforms JSON.
A relational database stores data in tables of rows and columns connected by keys, using SQL to query and manage it. This guide covers the relational model, normalization, transactions, and when to choose an RDBMS.
A SQL query is a declarative statement that asks a relational database for data. This guide explains the SELECT statement, WHERE filtering, JOIN across tables, GROUP BY aggregation, and how to read a query plan.
Database normalization is the process of structuring a relational database according to a series of normal forms to reduce data redundancy and improve data integrity. This guide explains why normalization matters, walks through 1NF, 2NF, 3NF, BCNF, 4NF, and 5NF with worked examples, and when denormalization is the right trade-off.
Object storage is a data architecture that stores files as objects with metadata and a unique ID, instead of as files in folders or fixed-size blocks. Learn how S3 buckets work, how object storage compares to block and file storage, and when to choose it.
