Mailosaur
Mailtrap
MailHog
mailslurp
MailCatcher
FakeSMTP
Mailpit
Litmus
RepDB
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.
Mailosaur 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, Mailosaur seems to be more popular. It has been mentiond 9 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.
Automate end-to-end scenarios, validate emails, and integrate with our API for seamless workflows. Https://mailosaur.com/. - Source: dev.to / 9 months ago
When setting up email tests, you might find it helpful to add some additional functionality to Cypress through integrations like those offered by Mailosaur. Mailosaur specializes in email and SMS testing, and provides an integration for Cypress that allows you to generate and check real email addresses directly within the testing environment, which means your tests can become more automated and efficient. If you... - Source: dev.to / over 1 year ago
That’s where Mailosaur comes in! An awesome tool that helps test emails (and even SMS) in an automated way. What’s even better? There’s an official Cypress plugin that makes email testing a breeze for us, the Cypress fans. - Source: dev.to / over 1 year ago
This is what Mailosaur[0] offers - countries available depends on tiers though due to the number operating costs and associated regulations. [0] https://mailosaur.com. - Source: Hacker News / almost 2 years ago
Open-source is good for solo and small projects, but there are commercial solutions with continuous support, etc. And other features (e.g. SMS) like Mailosaur too https://mailosaur.com/. - Source: Hacker News / almost 2 years ago
Mailtrap - Email Delivery Platform that delivers just in time. Great for businesses and individuals.
MailHog - MailHog is an email testing tool inspired by MailCatcher, but easier to install.
mailslurp - Email and SMS testing and development platform for software engineers and QA testers
MailCatcher - MailCatcher runs a super simple SMTP server which catches any message sent to it to display in a...
FakeSMTP - FakeSMTP is a Free Fake SMTP Server with GUI for testing emails in applications easily.
Mailpit - An email and SMTP testing tool with API for developers.
