Growth · alternatives · 2026

24 alternatives to SpamSieve

Add powerful spam filtering to your Mac’s e-mail client

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. SpamSieve launched in 2018; newer entries below may have overtaken it.

1
You've Got Spam▲305
A new tool that lets you spam back the spammer
2020 · youvegotspam.mschfmag.com · its alternatives →
2
mailX by mailwarm▲596
Email deliverability toolkit for humans and AI agents
May 2026 · themailx.com · its alternatives →
3
Mail Tester▲309
Test the spamminess of your email
2016 · mail-tester.com · its alternatives →
4
Boxy▲572
Inbox by Gmail, finally on your Mac
2015 · boxyapp.co · its alternatives →
5
Spam Checker by Mailmeteor▲88
Detect and remove spam words in your emails
2022 · mailmeteor.com · its alternatives →
6
Mailbox for Mac (Beta)▲490
Fly through your email. Now on Mac
2014 · theverge.com · its alternatives →
7
Boxy 2▲301
The best Mac client for Inbox by Gmail
2017 · boxyapp.co · its alternatives →
8
Unspam AI▲385
See how your subscribers read your emails with our AI inbox
2024 · unspam.email · its alternatives →
9
Mimestream, a native macOS email client for Gmail▲403
A native macOS email client for Gmail
2020 · mimestream.com · its alternatives →
10
Spamnesty: Waste spammers' time▲405
2016 · stavros.io · its alternatives →
11
Mailivery▲251
Reach the inbox, not the spam folder
2021 · mailivery.io · its alternatives →
12
Make senders work to get into your inbox▲44
Hi HN :) really excited to share this with you. The one thing AI reliably does is generate noise. Half the tools I see launch are just machines for producing more noise across more channels. And people are starting to see this in the form of emails in their inboxes as spam filters are struggling. There used to be a useful signal in email: the effort a sender put into customizing a message was a rough proxy for how relevant it actually was. AI killed that. Now it's customized slop with the appearance of effort with none of the cost. It is painful that the open internet / open channels…
Jul 2026 · captchainbox.com · its alternatives →
13
Unspam.email▲299
Email spam checker and newsletter heatmap prediction.
2020 · unspam.email · its alternatives →
14
Vetter▲134
Test if your emails will be spammed, using real accounts.
2020 · vetter.monsoonyeti.com · its alternatives →
15
Email Testing By Inbox Pirates▲355
Preview, analyze & test emails with one click
2022 · inboxpirates.com · its alternatives →
16
Warmup Inbox▲204
Free email spam checker & inbox placement tester
2023 · warmupinbox.com · its alternatives →
17
Mimestream 1.0▲175
A native macOS email client for Gmail
2023 · mimestream.com · its alternatives →
18
Silter▲115
No notification for spam messages
2024 · apps.apple.com · its alternatives →
19
SMS Junk Filter for iOS▲102
Block unwanted SMS spam text messages
2017 · apps.apple.com · its alternatives →
20
Lukewarm Emailer▲267
Build a list of people on Twitter, reach out w/ a cold email
2014 · its alternatives →
21
Ultramemory▲84
Private AI memory for your Mac with no cloud or account
Jun 2026 · mac-ultramemory.com · its alternatives →
22
Owly▲108
An AI powered iOS mobile app that blocks spam messages
2024 · apps.apple.com · its alternatives →
23
SMS Shield▲112
Machine Learning-based SMS spam filter for iOS 11
2017 · apps.apple.com · its alternatives →
24
Smart email filters to unfuck your email▲59
Fix your inbox instantly with smart filters
2025 · unfuck.email · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →