freesql.net

What It Is

FreeSql is an object-relational mapping (O/RM) component for the .NET ecosystem. Its official positioning is a “simple yet powerful” ORM, supporting .NET Core 2.1+, .NET Framework 4.0+, and Xamarin, and it is labeled as MIT open source with zero package dependencies. It is best suited for development teams that want to standardize database access, entity mapping, complex queries, and bulk write capabilities in .NET projects.

Core Capabilities

Based on the main content, FreeSql covers the mainstream capabilities expected from an ORM: it supports 28 common databases and provides query options such as multi-table, nested, union, and recursive queries. It supports CodeFirst, allowing table structures to be automatically synchronized from entity classes, as well as DbFirst, which imports entity classes from an existing database. For navigation properties, it supports one-to-many, many-to-many, and cascading operations. For engineering-oriented use cases, it also offers read/write splitting with a single line of code, BulkCopy insert/update/save, automatic table sharding, ClickHouse support, multi-tenant solutions, dynamic operations, and entity-free APIs.

Pricing and Open Source

FreeSql is released under the MIT license, making it a free and open-source tool. The official site provides a donation option, inviting users to scan a code to buy the author “a cup of coffee,” but the main content does not show any commercial edition, subscription plan, enterprise service, or SLA pricing. As a result, it offers excellent value for money, though enterprise-grade support should be verified separately by users.

Documentation, Ecosystem, and Ease of Use

The official site provides documentation, reference API docs, a changelog, FAQ, video tutorials, and comparison pages against Dapper and EntityFramework. It also lists Awesome FreeSql and additional extension resources. The related ecosystem includes projects such as FreeRedis, FreeScheduler, FreeIM, and AdminBlazor SaaS. For Chinese-speaking .NET developers, the Chinese documentation and “5-minute quick start” guidance lower the barrier to getting started.

Pros, Cons, and Best-Fit Users

Its strengths include being open source, having zero dependencies, supporting a wide range of databases, and covering practical backend scenarios such as CodeFirst, DbFirst, read/write splitting, table sharding, multi-tenancy, and bulk writes. Its limitations are that the official main content does not disclose commercial support, performance benchmarks, payment methods, or self-hosting details; as an ORM library, the concept of self-hosting is not particularly relevant either. It is suitable for .NET backend teams, projects using China-focused technology stacks, and developers who need multi-database compatibility or an alternative/complement to EntityFramework and Dapper.

Access from China

Judging from the domain and the availability of Chinese documentation, users in China are likely able to access it directly. For payments, the main content only mentions QR-code donations and does not specify channels such as WeChat Pay or Alipay. Comparable alternatives include Dapper and EntityFramework.