liblab
Fern
Speakeasy
APIMATIC
Conektto
RubyGems
Konfig
OpenAI
RepDB
liblab is an SDK generation platform that helps companies create high-quality, developer-friendly SDKs for their APIs in multiple languages. Our technology automates the process of generating, maintaining, and optimizing SDKs, ensuring compliance and best practices while saving engineering teams time. We work with fintech, telecommunications, and other industries that rely on robust API ecosystems. Backed by $50 million in funding, liblab is focused on making SDK development seamless and scalable.
RepDB is a one-time-purchase exercise dataset with animations for developers building fitness and workout apps — 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 600+ exercises with flat-style 512×512 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 — 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.
liblab RepDBRepDB's answer:
RepDB is sold as a one-time download, not a metered API — 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 — 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, liblab seems to be more popular. It has been mentiond 5 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.
After evaluating multiple SDK-as-a-service vendors, including Speakeasy, Fern and Liblab, we selected Speakeasy as our strategic partner. Speakeasy’s philosophy aligns with our mission to deliver an outstanding developer experience. Here’s why we’re excited about this partnership:. - Source: dev.to / over 1 year ago
SDKs are a powerful way to improve the developer experience of your API. They come with a cost - the amount of work needed to generate them. This is why automation is so important. With liblab you can automate the process of generating SDKs, and keep them in sync with your API as it evolves. - Source: dev.to / almost 2 years ago
When it comes to generating SDKs, liblab is your friend. Liblab is a platform that generates SDKs from your OpenAPI spec, so you can use them in your app. Whether you are accessing internal APIs, or third party APIs, all you need is an API spec, and liblab will generate the SDK for you. - Source: dev.to / almost 2 years ago
At liblab, we tackle complex engineering problems to build SDKs for our customers and their end users, who are engineers themselves. Our team's extensive knowledge in software, software-as-a-service solutions, and developer tools is critical to our success. Therefore, retaining our talented developers is a priority. - Source: dev.to / almost 2 years ago
How do you guys differ against https://www.speakeasyapi.dev and https://www.buildwithfern.com? - Source: Hacker News / over 2 years ago
Fern - Describe your API endpoints, types, errors, and examples. Generate SDKs, documentation, and server boilerplate.
Speakeasy - Create great integration experiences for your APIs: native-language SDKs, Terraform providers, and friction-free docs.
APIMATIC - APIMATIC offers developer experience platform for public, private, and internal APIs.
Conektto - API Design, develop and test tool
RubyGems - RubyGems. org is the Ruby community's gem hosting service. Instantly publish your gems and then install them. Use the API find out more about available gems. Become a contributor and improve the site yourself.
Konfig - Generate SDKs to Easily Onboard External Devs to your API