Folderly
Loops.so
Mailwarm
Warmy.io
Warmup Inbox
MailReach.co
Warmbox.ai
Resend
RepDB
Folderly is more than just an email deliverability tool.
Deep email deliverability fixes, technical setup, access to an up-to-date deliverability score, user-friendly template management, team accounts, and, now, spam trigger detection with best practices to followโall of these features assist you in reaching and maintaining 99.9% email deliverability.
Locate, solve, and prevent email deliverability pitfalls, and ensure your emails reach the Inbox folder. Never again let your emails be part of the 51% of all business emails that never reach the inbox. Make every email count, bringing in revenue and business opportunities.
How will you use Folderly?
Reach the recipients' Inbox. Folderlyโs advanced algorithms analyze your outbound email campaigns and identify issues that cause your emails to be filtered out of recipients' inboxes.
Increase delivery, reply, and conversion rates. We will identify the most pressing issues by analyzing your entire email ecosystem and suggest the simplest ways to address them.
Skyrocket revenue from email outreach. By delivering 100% of your emails, you can significantly boost your sender score, generate more leads, and ultimately increase your email channel's ROI.
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.
Folderly RepDBFolderly is recommended for marketers, email campaign managers, and businesses that heavily depend on email as a primary communication tool, especially those who experience issues with emails being marked as spam. It is also suitable for businesses looking to optimize their outreach efforts and improve overall email deliverability rates.
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.
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.
Our field of work requires extensive communication via email; therefore, we needed a solution that would monitor our email deliverability rate and help us eliminate any possible issues causing our emails to land in spam, if they arise. Folderly performs its job well and protects our email reputation. The team has helped us fine-tune our email infrastructure, and is overall very responsive - they always answer our questions in a timely and detailed manner.
With Folderly, we have a clear picture of the situation with our mailboxes, understand what exactly caused our emails to go to spam, and see our campaigns' performance getting better. The team is always ready to give us a helping hand and explain what we need to do next.
We thought our email campaign is doing good, but Folderly team boosted results to super cool! They are always there to help and give insightful advice. If you have troubles with spam and want to improve your email deliverability, Folderly would be your best choice ;-)
Based on our record, Folderly seems to be more popular. It has been mentiond 60 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.
Make โข Build and automate workflows InvoiceBerry โข Online invoicing for small businesses Gusto โข Payroll, benefits and HR management Hive โข Manage tasks, workflows and teamโs work Lanva โข Social video editing app. ClickUp โข Manage tasks, docs, chat, goals and more Plausible โข Open-source privacy-friendly web analytics Podcast Hawk โข Podcast guest booking software. Writesonic โข AI-driven content... Source: over 3 years ago
BTW, the same thing I noticed with emails. I recently started to work with them, and differentiating emails and sending them to the right group of people brings a more positive outcome. We recently checked it on https://folderly.com/. So, I think those things can be linked to each other. Source: almost 4 years ago
Finally, I would suggest you also use https://folderly.com/ in addition to those two email clients. I would help you avoid making your emails spammy and maintain a high email deliverability score. Itโs essential if youโre using email for business purposes. Source: almost 4 years ago
Besides, I recently noticed that Apple mail didnโt send my emails. I thought my clients didnโt receive my emails because they were in the spam folder. But, I checked my email deliverability on https://folderly.com/, and it was OK. So, Iโve been looking at what makes my clients not get my emails and discovered that this email client doesnโt send them for some reason. Source: almost 4 years ago
But, after testing my email campaign on my friends, I was left puzzled why my letters went to spam. I've read somewhere that you can run all your emails before launching the marketing campaign on https://folderly.com/. I did it, and my score wasn't the best, nor too low. I thought the reason might be in the attached PDF file and links to my store. Do you think that it might be the case? If yes, what are the... Source: almost 4 years ago
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