authentik
Keycloak
ZITADEL
Auth0
VoidAuth
Authelia
Okta
Ory
RepDB
RepDB is a one-time-purchase exercise dataset for developers building fitness and workout apps โ not a subscription, not a rate-limited API. You download the data once and own it: JSON (and SQLite on the higher tier), WebP images, and full EN/DE/ES translations, with no per-request billing and no dependency on our servers staying up.
A free tier includes 400 exercises with flat-style 512ร512 images, attribution-licensed for commercial in-app use. The Starter tier ($199) adds the full catalog in classic white-background style. Standard ($399) adds transparent 1024px images, looping animations, exercise relations (similar/progressions/regressions), workout templates, and embeddings โ exclusive to that tier.
Every exercise includes muscle-group highlighting, equipment/muscle icons, MET values, and safety/goal tags. Compared to GIF- or JPG-based competitor APIs, RepDB images are transparent WebP with no watermarks, so they drop into any app UI without a white box around them.
authentik RepDBRepDB's answer:
RepDB is sold as a one-time download, not a metered API โ you own the JSON/SQLite data and WebP images outright, with no rate limits, no per-request billing, and no risk of the vendor cutting off access. It's also the only dataset in this space with EN/DE/ES translations, transparent (alpha-channel) images with no watermark, muscle-group highlighting, safety/goal tags, and looping animations on the higher tier.
RepDB's answer:
RepDB grew out of a consumer workout app its creator was building solo. Sourcing exercise images and data meant either paying for a subscription API with usage caps and no caching rights, or producing everything from scratch. The illustrated, multi-language dataset was built for us first, then split out as its own product once it became clear other indie developers had the same problem and preferred to buy the data outright rather than rent it through an API.
RepDB's answer:
Most alternatives are subscription APIs โ you pay monthly, you're capped on requests, and ExerciseDB's terms of use explicitly forbid caching or storing the data at all, so every image render is a live paid API call. RepDB is the opposite: pay once, download the files, self-host with zero ongoing dependency. It's also the only option offering true DE/ES localization and transparent images instead of a white box behind every exercise.
RepDB's answer:
Solo developers and small teams building fitness or workout-tracking apps (iOS, Android, web) who need licensed exercise images and structured exercise data, but don't want to build their own media pipeline or depend on a rate-limited third-party API.
Based on our record, authentik seems to be more popular. It has been mentiond 52 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Https://goauthentik.io/#comparison They have an enterprise version now (mostly for support and bleeding edge features that later make it into the open source product.) It's pretty easy to self host. I have been doing it for a small site for years and I couldn't even get any other open source solution to work. They are mostly huge with less features. - Source: Hacker News / 9 months ago
I recently set up passkey-only sign ins for a webapp I'm writing using Authentik [0](Python OIDC provider, with quite a nice docker-compose run-up, took only minutes to stand up.) It was surprisingly easy to configure everything so that passkeys are the only thing ever used. If anyone would be interested I could write it up? I was surprised what a nice user flow it is and how easy it was to achieve. [0]... - Source: Hacker News / about 1 year ago
I set up Authentik[^1] on my NAS in a docker container and went from there! Just had to add a .well-known webfinger file to my domain that pointed to the Authentik instance and it "just worked" with Tailscale. [^1]: https://goauthentik.io/. - Source: Hacker News / about 1 year ago
Authentik Security | Senior Engineer | US | REMOTE (anywhere) | Full-time Authentik Security (https://goauthentik.io) is the company behind authentik (https://github.com/goauthentik/authentik. - Source: Hacker News / about 1 year ago
> Honest to god, if an IdP like Okta made an Active Directory replacement that ran via container https://goauthentik.io/ can run in docker. It can be paired in with openldap containers, too. - Source: Hacker News / over 1 year ago
Keycloak - Open Source Identity and Access Management for modern Applications and Services.
ZITADEL - The Identity Infrastructure for Modern B2B SaaS
Auth0 - Auth0 is a program for people to get authentication and authorization services for their own business use.
VoidAuth - Single Sign-On for Your Self-Hosted Universe ๐โโฌ๐
Authelia - Authelia is an open-source authentication server providing SSO and two-factor for your applications running behind NGINX.
Okta - Enterprise-grade identity management for all your apps, users & devices
