Better Auth vs ConvertAny: Which Is Better in 2026?

For TypeScript developers, auth has long meant choosing between rolling your own (risky) or renting a closed service (lock-in). Better Auth offers a third way that's caught fire in the community — 'the most comprehensive authentication framework' for TypeScript, one that lives inside your own app rather than on someone else's servers.

Auth that lives in your codebase

Better Auth is a composable, plugin-based authentication framework that runs inside your application, giving you full control and no vendor lock-in. It provides built-in credential authentication with sessions, email verification and password reset out of the box — the essentials, implemented correctly so you don't reinvent them. Because it's a framework in your code rather than an external API, you own the whole flow and your users' data stays with you. It sits alongside self-hostable auth tools like SuperTokens, Logto and Ory.

35+ methods, from magic links to passkeys

Better Auth supports 35+ authentication methods, including social sign-on (Google, GitHub, Apple, Discord), passkeys, magic links and multi-factor authentication. That breadth means whatever login experience you want to offer, it's likely a plugin away rather than a custom build. The plugin architecture is key — you add exactly the capabilities you need and nothing you don't, keeping your auth lean and tailored.

Scales to enterprise

It's built to grow from a weekend project to enterprise scale. Multi-tenancy — teams, roles, invitations and access control — is built directly into the framework, and enterprise features include SSO, SAML 2.0, SCIM and directory sync, plus real-time security detection for bots, brute-force attempts and suspicious access. That means you won't outgrow it when you land your first big customer.

Framework-friendly

Better Auth works with Next.js, Nuxt, SvelteKit, Astro, Hono and 20+ more frameworks, so it fits the modern TypeScript ecosystem naturally rather than fighting it.

Who it's for

Better Auth suits developers building TypeScript applications who want flexible, self-hosted authentication without vendor lock-in — from solo hackers to enterprise teams.

Pricing

Better Auth is freemium: the open-source framework is free and self-hosted, with optional paid infrastructure services (a dashboard, audit logs, security detection and enterprise features) available on paid plans. You can build entirely on the free open-source core and add managed services only if you want them.

Bottom line: Better Auth is a comprehensive, plugin-based auth framework that lives in your TypeScript app — 35+ methods, multi-tenancy and enterprise SSO, fully self-hosted with no lock-in — which is exactly why it's become a developer favorite.

ConvertAny is a free online toolkit that brings several everyday conversion tasks into one browser-based website. It combines file conversion, unit conversion, text utilities, app icon generation, and developer utilities. Rather than installing a separate application for each small conversion job, users can open the relevant tool in a web browser and work with the type of content they need to change. The service can be used without creating an account.

The file conversion section covers documents, images, audio, video, archives, fonts, and presentations. These categories address different practical needs: a document may need to be shared in another format, an image may need to work with a particular application, or a font or presentation may need a different file type. Users choose a suitable converter for the material they are working with. General file conversion uses cloud processing, so this part of the website is not an entirely local or offline workflow.

ConvertAny also provides tools for working with text. These include case conversion, encoding and decoding, hashes, text cleanup, and conversion between Simplified and Traditional Chinese. Such tools are useful when preparing a piece of text for another application or making small changes to content during routine work. String tools and developer utilities process data locally in the browser.

The developer utilities cover several structured-data and technical tasks. Available tools work with JSON, YAML, XML, and TOML; timestamps and time zones; number bases; file encodings; IPv4 and IPv6; color codes; and image-to-Base64 conversion. A developer may use these utilities while preparing an example, inspecting a value, or adapting data for a workflow. The tools are presented as browser utilities rather than an API service or an open-source software package.

For app projects, ConvertAny includes app icon generation for iOS, Android, and macOS. Its image, icon, and color-related tools can also be relevant to design work. Unit conversion provides another entry point for users whose task is about a measurement rather than a file or text string.