Mailstrom might be a bit more popular than Throttle. We know about 1 link to it since March 2021 and only 1 link to Throttle. 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.
I use Throttle: https://throttlehq.com. Source: almost 3 years ago
I know of two. https://mailstrom.co/ https://clean.email/. - Source: Hacker News / over 2 years ago
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