Software Alternatives, Accelerators & Startups

Cerbos VS RepDB

Compare Cerbos VS RepDB and see what are their differences

Cerbos logo Cerbos

Cerbos helps teams separate their authorization process from their core application code, making their authorization system more scalable, more secure and easier to change as the application evolves.

RepDB logo RepDB

Exercise dataset for fitness apps: transparent background, animations, no subscription
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  • Cerbos Landing page
    Landing page //
    2023-08-21

Cerbos is a self-hosted, open source authorization layer that separates your authZ logic from your core application code.

Cerbos allows for swift and secure set up and modification of complex roles and permissions. Unlike traditional methods that require intricate code manipulation, Cerbos simplifies the process by making changes through configuration. This reduces risks associated with authZ changes, such as downtime or security incidents.

Cerbos' structure, independent from the app code, allows both business stakeholders and non-expert engineers to understand the permissions structure. A broader range of stakeholders can make changes to the authZ logic without needing extensive coding knowledge or risking the stability of the core application.

In an era where authZ logic is business logic, the ability to quickly adapt and scale this element is vital. Cerbos makes this possible, facilitating an agile response to new markets and customer needs while maintaining a mature product.

  • RepDB
    Image date //
    2026-07-21
  • RepDB Landing page
    Landing page //
    2026-07-21
  • RepDB
    Image date //
    2026-07-21

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 512ร—512 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.

RepDB

Website
repdb.co
$ Details
freemium $199.0 / One-off
Platforms
Web Mobile
Release Date
2026 July

Cerbos features and specs

  • Flexibility
    Cerbos is designed to be highly flexible, allowing for complex policy definitions and use cases that can accommodate a wide range of authorization needs.
  • Scalability
    Cerbos can handle large volumes of authorization requests efficiently, making it suitable for applications that need to scale.
  • Compatibility
    It can be easily integrated with various existing systems and technologies, thanks to its support for standard protocols and formats.
  • Open Source
    As an open-source project, Cerbos offers transparency, extensibility, and community support, allowing users to contribute and customize their own solutions.

Possible disadvantages of Cerbos

  • Complexity
    The flexibility and features of Cerbos might introduce a steeper learning curve for new users who are not familiar with authorization systems.
  • Resource Intensive
    Depending on the deployment and configurations, running a Cerbos instance might require significant resources, which could be a consideration for smaller projects.
  • Limited Documentation
    Users might find that certain advanced features or integrations are not as well-documented, potentially leading to difficulties in implementation.

RepDB features and specs

  • WebP Format Benefits
    start+peak exercise images
  • JSON
    relations, metadata, equipment
  • Transparency
    transparent background
  • Animations
    Animated loops in paid tier

Cerbos videos

Cerbos - How It Works - Intro

RepDB videos

No RepDB videos yet. You could help us improve this page by suggesting one.

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Category Popularity

0-100% (relative to Cerbos and RepDB)
Developer Tools
83 83%
17% 17
Datasets
0 0%
100% 100
Security
100 100%
0% 0
Open Source
100 100%
0% 0

Questions & Answers

As answered by people managing Cerbos and RepDB.

Which are the primary technologies used for building your product?

Cerbos's answer

  • Go
  • Protobuf
  • gRPC
  • CEL

What makes your product unique?

Cerbos's answer

Cerbos stands out in the crowded authorization landscape due to its innovative approach to managing roles and permissions. Unlike traditional systems that embed authorization logic within an application's core code, Cerbos introduces a standalone, self-hosted, stateless service, transforming intricate coding tasks into simpler configurations. This separation not only streamlines the authorization process but also reduces potential security risks and system bottlenecks.

Being open-source, Cerbos fosters a strong community backing, ensuring its evolution aligns with real-world developer needs. Its adaptability is evident in its support for multiple SDKs, YAML configuration, and dynamic context handling, which cater to a wide range of environments and use-cases. This flexibility is further enhanced by Cerbos Cloud, a premium solution offering advanced policy management tools.

Furthermore, Cerbos emphasizes transparency, allowing both technical and non-technical stakeholders to understand and modify the permissions structure. This democratization of authorization logic management reduces reliance on specialized coding expertise. Additionally, its commitment to robust security features, including audit logging and risk mitigation, ensures that businesses can trust Cerbos to safeguard their authorization processes.

In essence, Cerbos' unique blend of innovation, adaptability, community support, and security focus reshapes the way businesses approach and manage authorization, making it a game-changer in the field.

RepDB'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.

How would you describe the primary audience of your product?

Cerbos's answer

Cerbos' primary audience is best described as forward-thinking engineering leaders at the helm of emerging startups, particularly within the FinTech and Software Development sectors. These leaders typically oversee small to medium-sized teams, with 5-20 engineers, in companies that have a workforce ranging from 0 to 100 employees. Their technological stack prominently features Kubernetes (k8s), indicating a modern and scalable infrastructure.

Financially, these companies are in their early growth stages, having secured funding between 0 to 10 million dollars, primarily in the Seed to Series A range. This suggests that they are in a phase of rapid expansion and are actively seeking solutions that can seamlessly scale with their growth.

The primary objectives of Cerbosโ€™ users revolve around finding a reliable solution to their authorization challenges, ensuring that the chosen solution can be implemented without disruptions, and that it scales effortlessly as the company grows. In essence, the Cerbos champion is a visionary engineering leader, keen on adopting innovative solutions that align with their company's rapid growth trajectory.

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.

What's the story behind your product?

Cerbos's answer

Cerbos, co-founded by Emre and Charith, emerged from a vision to revolutionize the way authorization is approached in modern, cloud-native applications. The duo recognized a persistent challenge in software development: the immense time and effort developers invest in crafting and continually updating custom permissions. This repetitive cycle not only consumes valuable time but also diverts attention from the core essence of product development.

Driven by this realization, Emre and Charith embarked on a mission with Cerbos: to make the implementation of access-control as seamless and painless as possible. Their goal was to eliminate the need for repeatedly writing and rewriting custom permissions implementations. Instead, they envisioned a world where developers could channel their energies and creativity into building outstanding products that resonate with and delight their customers.

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.

Who are some of the biggest customers of your product?

Cerbos's answer

Why should a person choose your product over its competitors?

Cerbos's answer

A person should choose Cerbos over its competitors for several compelling reasons:

Innovative Design: Unlike many competitors, Cerbos separates the traditionally embedded authorization logic from the application's core code. This standalone, stateless service simplifies authorization changes, converting intricate coding tasks into straightforward configurations.

Open-Source Flexibility: Cerbos' open-source nature ensures continuous evolution based on real-world feedback. This community-driven approach ensures that the product remains relevant and adaptable to changing needs.

Transparency and Inclusivity: Cerbos' structure allows a broader range of stakeholders, both technical and non-technical, to understand and modify the permissions structure. This democratizes the authorization process, reducing the dependency on specialized coding expertise.

Robust Security: Cerbos places a strong emphasis on security, offering features like audit logging and risk mitigation. This commitment ensures businesses can trust Cerbos to maintain the integrity of their authorization processes.

Flexibility and Control: Cerbos provides complete control over its deployment, scaling, and monitoring. Unlike solutions that are solely cloud-based or hardcoded, Cerbos strikes a balance between flexibility, control, and security.

Clear Value Proposition: Cerbos offers straightforward pricing and a user-friendly approach, contrasting with competitors that may have complex pricing structures or less intuitive systems.

Community and Support: As an open-source project, Cerbos boasts a strong community backing, ensuring users have access to a wealth of knowledge and support.

In summary, Cerbos' unique blend of innovation, flexibility, transparency, and security makes it a superior choice in the authorization landscape.

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.

User comments

Share your experience with using Cerbos and RepDB. For example, how are they different and which one is better?
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Social recommendations and mentions

Based on our record, Cerbos seems to be more popular. It has been mentiond 6 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.

Cerbos mentions (6)

  • Show HN: Authorization game โ€“ matching requests to permission policies
    I wanted to get back to coding and play around with a simple way to explain how our product works(permission management platform, https://cerbos.dev). So I built the Cerbos Game, where players match incoming requests to permission policies and decide to ALLOW or DENY them; just like our product does for software apps. This game disrupted our engineering teamโ€™s daily work as they competed to beat the high score.... - Source: Hacker News / over 1 year ago
  • Nuxt authorization: How to implement fine-grained access control
    In this tutorial you will learn how to use Cerbos to add fine-grained access control to any Nuxt web application, simplifying authorization as a result. - Source: dev.to / over 2 years ago
  • ๐Ÿ–Œ๏ธโš™๏ธ Innovate Like Da Vinci: Blending Art and Science in Software Development
    In my work with Cerbos, I apply the lessons learned from Da Vinci to tackle authorization challenges. Our approach is to create solutions where functionality seamlessly integrates with developer experience. Constantly iterating and viewing the tools through the users' lens, helps ensure that our access control solutions are robust and dev-friendly. - Source: dev.to / over 2 years ago
  • Feedback needed: Cerbos Hub is now in public beta!
    Hello fellow devs! I'm with Cerbos (https://cerbos.dev/), a tool designed to manage who can do what in your software applications. - Source: dev.to / almost 3 years ago
  • Show HN: Cerbos Hub โ€“ Implement roles and permissions in your app in minutes
    Hello HN! I'm on the DevRel team at Cerbos (https://cerbos.dev/), a tool designed to manage who can do what in your software applications. For a couple of years now, Open Worldwide Application Security Project (OWASP) is naming authorization a top 10 API security risk: https://owasp.org/API-Security/editions/2023/en/0x11-t10/ We are thrilled to announce that Cerbos Hub is now in public beta! - Source: Hacker News / almost 3 years ago
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RepDB mentions (0)

We have not tracked any mentions of RepDB yet. Tracking of RepDB recommendations started around Jul 2026.

What are some alternatives?

When comparing Cerbos and RepDB, you can also consider the following products

Aserto - Fine-grained, scalable authorization in minutes

authzed - The platform to store, compute, and validate app permissions

Oso - A batteries-included system for authorization.

Warrant - Authorization and access control infrastructure for developers

Ory - Developer-first Access Management

Permit.io - Fullstack Authorization as a Service for cloud native applications