AI · alternatives · 2026

24 alternatives to Superinbox

Email vibing in your Gmail / Outlook

Superinbox is an AI email tool that works within Gmail and Outlook to draft replies matching the user's writing style and automatically organize inboxes. The product learns from existing emails to generate contextually… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Prices are shown for the 1 we have checked on their own sites, 1 of them free or with a free tier.

1
Superflows▲476
AI assistant for email - get to inbox zero faster
2023 · superflows.ai · its alternatives →
2
Inbox Zero▲821
Clean Up Your Inbox In Minutes Newsletter management, AI automation, and email analytics. Inbox Zero is the open-source email app that puts you back in control of your inbox.
2023 · getinboxzero.com · its alternatives →
3
Upstream▲976
The inbox designed for humans and agents
Jun 2026 · upstream.do · its alternatives →
4
ZeroInbox.ai▲130
Check it out lets make it better
2024 · zeroinbox.ai · its alternatives →
5
Inbox by Google▲1,147
Next generation inbox
2014 · google.com · its alternatives →
6
AI Emailyfree tier, from $14.99/mo▲165
Your AI inbox that writes like you + replies on autopilot
Jul 2026 · aiemaily.com · its alternatives →
7
Hello Inbox▲283
Hey HN, I built an email deliverability SaaS with a RAG system. It's trained on all my knowledge and hundreds of real deliverability use cases from 4+ years experience as an Email Deliverability Specialist on Upwork. It solves a frustration problem a lot of businesses are experiencing. I'm looking for feedback so let me know in the comments.
Aug 2026 · helloinbox.email · its alternatives →
8
TextCraft AI▲181
Smart inbox, smart emails - AI at your service
2023 · chromewebstore.google.com · its alternatives →
9
Gmail in the Gemini Era▲371
Ask your inbox anything to get summaries, drafts, & more
Jan 2026 · blog.google · its alternatives →
10
EzMail.AI▲115
Reply to emails 10X faster with pre-filled drafts by AI
2023 · its alternatives →
11
Revo AI Email Assistant▲338
AI with accurate replies that tackle the next-step tasks
Feb 2026 · revo.ai · its alternatives →
12
Auto Gmail▲82
Let AI draft answers to all your inbound emails
2023 · chromewebstore.google.com · its alternatives →
13
Warmbox▲383
Warm-up your inbox and never land in spam
2021 · warmbox.ai · its alternatives →
14
Lavender▲233
A complete AI toolkit for amazing 1:1 emails in your inbox.
2020 · lavender.ai · its alternatives →
15
Flow-e 2.0▲259
Turn your Gmail & Outlook into Trello-like task lists 💌
2018 · flow-e.com · its alternatives →
16
Darwin Mail▲259
Enhance Gmail to get your Google Inbox features back.
2019 · darwinmail.app · its alternatives →
17
ReplylessAI▲122
AI Email app that's affordable, Hit Inbox Zero
Mar 2026 · replyless.ai · its alternatives →
18
AI Mail Assistant▲63
Generate, translate, summarize & improve emails
2023 · chatgptservices.app · its alternatives →
19
Ovy▲268
One click AI-generated email replies for Gmail
2022 · chromewebstore.google.com · its alternatives →
20
Super Send 2.0▲157
Automate cold outreach - email, Linkedin & Twitter
2023 · supersend.io · its alternatives →
21
Reply.id▲81
Supercharge your inbox with our AI Gmail filter
2018 · mediakaskus.com · its alternatives →
22
Signal – Edit emails in your Gmail inbox▲151
2013 · trysignal.com · its alternatives →
23
AIMail▲51
Your AI email assistant for faster email communication
2024 · its alternatives →
24
Replybox | AI Email Reply for Gmail▲11
Smart replies, summaries & scheduling made simple
2025 · replybox.app · 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 →