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FluentValidation Alternatives
Similar projects and alternatives to FluentValidation
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Stream
Stream - Scalable APIs for Chat, Feeds, Moderation, & Video. Stream helps developers build engaging apps that scale to millions with performant and flexible Chat, Feeds, Moderation, and Video APIs and SDKs powered by a global edge network and enterprise-grade infrastructure.
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Entity Framework
EF Core is a modern object-database mapper for .NET. It supports LINQ queries, change tracking, updates, and schema migrations.
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InfluxDB
InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
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ua-parser-js
"Unmask Your Traffic" - UAParser.js: The Essential Web Development Tool for User-Agent Detection
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enquirer
Stylish, intuitive and user-friendly prompts. Used by eslint, webpack, yarn, pm2, pnpm, RedwoodJS, FactorJS, salesforce, Cypress, Google Lighthouse, Generate, tencent cloudbase, lint-staged, gluegun, hygen, hardhat, AWS Amplify, GitHub Actions Toolkit, @airbnb/nimbus, and more! Please follow Enquirer's author: https://github.com/jonschlinkert
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Fluent Assertions
A very extensive set of extension methods that allow you to more naturally specify the expected outcome of a TDD or BDD-style unit tests. Targets .NET Framework 4.7, as well as .NET Core 2.1, .NET Core 3.0, .NET 6, .NET Standard 2.0 and 2.1. Supports the unit test frameworks MSTest2, NUnit3, XUnit2, MSpec, and NSpec3.
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Humanizer
Humanizer meets all your .NET needs for manipulating and displaying strings, enums, dates, times, timespans, numbers and quantities
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Mediator.Net
A simple mediator for .Net for sending command, publishing event and request response with pipelines supported
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Polly
Polly is a .NET resilience and transient-fault-handling library that allows developers to express policies such as Retry, Circuit Breaker, Timeout, Bulkhead Isolation, and Fallback in a fluent and thread-safe manner. From version 6.0.1, Polly targets .NET Standard 1.1 and 2.0+.
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a better FluentValidation alternative or higher similarity.
FluentValidation discussion
FluentValidation reviews and mentions
Posts with mentions or reviews of FluentValidation.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2025-06-11.
- Review Qodana static code analysis and SCA/SBOM license audit
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Working with interfaces
IValidator is registered as service for the following validator.
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🚀 Introducing NextSolution V2: ASP.NET API + Next.js + Expo Starter Template
This template was built using a variety of powerful frameworks and tools, including: .NET, Ngrok, JWT (JSON Web Tokens), Entity Framework, AutoMapper, FluentValidation, Flurl, Humanizer, libphonenumber-csharp, MailKit, OAuth, Serilog, Twilio, Swagger, React.js, React Native, React Navigation, Axios, Expo Dev, Lodash, NativeWind, React Hook Form, Zustand, Visual Studio Code, Visual Studio, Android Studio, Git, GitHub Copilot, Node.js, React Native Paper, NextUI
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Nested validation in .NET
FluentValidation is undoubtedly the most popular third-party validation library on .NET. It is a robust choice if you need clean POCOs or multiple validation maps per type. However, its performance may surprise you.
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FluentValidation inline validate
Note There is no formal documentation for inline validation. See source code.
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20 Top C# Frameworks and Libraries on GitHub for Building Powerful Applications
18. FluentValidation.AspNetCore
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Easiest way to build the fastest REST API in C# and .NET 7 using CQRS
Here is an example of Command handler with built-in Fluent Validation and fire and forget style:
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8 quick tips to improve your .NET API
There is an RFC called Problem Details (RFC7807) that standardizes how an error in an API should be responded to for the client. If you use Fluent validation, you may have noticed that the response is within this pattern.
- [Parte 2] CQRS y MediatR: Validando con FluentValidation
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Building REST APIs In .Net 6 The Easy Way!
here we're defining the input validation requirements using fluent validation rules. let's see what happens when the user input doesn't meet the above criteria. execute the same request in swagger with the following incorrect json content:
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A note from our sponsor - InfluxDB
www.influxdata.com | 8 Jul 2025
Stats
Basic FluentValidation repo stats
26
9,412
7.7
11 days ago
FluentValidation/FluentValidation is an open source project licensed under Apache License 2.0 which is an OSI approved license.
The primary programming language of FluentValidation is C#.
Popular Comparisons
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