Open-source alternatives guide · Updated 2026

Best open-source alternatives to Simkl

Compare the best free and open-source alternatives to Simkl — 3 verified projects with explicit catalog relationships. Inspect licenses, GitHub activity, self-hosting signals, and migration fit before you switch.

3verified alternatives
0self-hosted signals
2categories

Only explicit alternative relationships are shown—never inferred competitor claims.

Overview

This guide compares 3 verified open-source alternatives to Simkl, including SeriesGuide, Showly, and Tonkatsu Box.

Projects appear across Content & Collaboration and Data & Analytics. Ranking follows public GitHub stars and recorded momentum—not vendor marketing. Compare projects side by side, then confirm license fit, migration effort, and operational ownership before adopting any option.

Strongest repository-activity signal: SeriesGuide · Jump to ranking · 2.1K stars

About Simkl

Proprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, repository activity, and self-hosting options befo

Ranked open-source alternatives to Simkl

Compare capabilities, licensing, and ownership model. Stars help with discovery; they are not a security or product-fit guarantee.

SeriesGuide

Open-source alternative to Simkl

Content & CollaborationLicense not declared

Track your favorite TV shows and movies with this Android app

Track your favorite TV shows and movies with this Android app Review the official repository, license, release activity, and deployment documentation before production adoption.

Best for: Knowledge teams
Deployment: Inspectable source
License: License not declared
Activity: Updated 30 hours ago

Key capabilities

android

kotlin tmdb android-application

Showly

Open-source alternative to Simkl

Content & CollaborationGPL-3.0

Showly is a modern and slick Movies and TV Shows manager.

Showly is a modern and slick Movies and TV Shows manager. Review the official repository, license, release activity, and deployment documentation before production adoption.

Best for: Knowledge teams
Deployment: Inspectable source
License: GPL-3.0
Activity: Updated 22 days ago

Key capabilities

Kotlin

Github Actions

Bash

Tonkatsu Box

Open-source alternative to Simkl

Data & AnalyticsMIT

Free open-source app to organize collections of retro games, movies, TV shows & anime. Track progress, rate favorites, create visual boards, share with friends. Flutter · Windows · Android · Linux · MacOS

Free open-source app to organize collections of retro games, movies, TV shows & anime. Track progress, rate favorites, create visual boards, share with friends. Flutter · Windows ·

Best for: Data teams
Deployment: Inspectable source
License: MIT
Activity: Updated Jul 15, 2026

Key capabilities

open-source

sqlite

flutter macos-app

How to choose a Simkl alternative

Map must-have capabilitiesList the workflows in Simkl you cannot drop during migration.

Verify the licenseConfirm it fits your use, distribution, and compliance model. Browse license briefs.

Run a proof of conceptTest real data, integrations, clients, and failure modes. Use Compare for side-by-side checks.

Plan ownershipAssess upgrades, backups, support, and an exit path. Read when self-hosting is worth it.

Frequently asked questions about Simkl alternatives

What are the best open-source alternatives to Simkl?

OpenSourceChoice currently lists 3 projects with an explicit alternative relationship to Simkl. Catalog highlights include SeriesGuide, Showly, and Tonkatsu Box. Rankings follow public GitHub stars and recorded momentum—not paid placement. Match capabilities and license fit to your workflow before adopting any option.

Are open-source alternatives to Simkl free?

Most catalogued alternatives publish source under OSI or source-available licenses and are free to inspect. Hosting, commercial support, or cloud model APIs may still cost money. Always read the project license for your use case.

Can I self-host an alternative to Simkl?

Some open-source replacements support self-hosting or local deployment; others are libraries or clients without a server component. Check each project’s deployment docs rather than assuming a drop-in hosted twin.

How should I evaluate Simkl alternatives?

Map must-have Simkl workflows, verify license and compliance fit, run a proof of concept with real data and integrations, then plan ownership for upgrades, backups, support, and an exit path.