AI · alternatives · 2026
24 alternatives to An open source alternative to Superhuman
Caley.io reimagines your inbox with a fusion of AI brilliance and unmatched efficiency. Think smarter analytics, streamlined conversations, and effortless newsletter management all in one sleek package. More than an email client, it's your unfair advantage.
Caley.io is an open-source email client that uses AI to help users manage their inbox more efficiently. It offers analytics, conversation organization, and newsletter management features. The tool is designed for… 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. An open source alternative to Superhuman launched in 2024; newer entries below may have overtaken it.
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World's first open source AI scheduling assistant
2023 · cal.com · its alternatives →
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Warmy.io▲417Boost your email deliverability with an AI driven algorithm
2024 · warmy.io · its alternatives →
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Inbox Zero▲821Clean 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 →
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April▲664Reach Inbox Zero by speaking with your email & calendar
2025 · apps.apple.com · its alternatives →
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AI Emailyfree tier, from $14.99/mo▲165Your AI inbox that writes like you + replies on autopilot
Jul 2026 · aiemaily.com · its alternatives →
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Free and open-source. Simple alternative to cal.com / calendly, built on Google-App-Script for Gmail users. Built with modern technologies like React, TypeScript, Shadcn/UI, and Vite.
2024 · github.com · its alternatives →
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Mailgo▲469AI-powered cold email platform that boosts deliverability
2025 · mailgo.ai · its alternatives →
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Quartz▲270AI email client built for focus. Runs locally on your Mac
Jun 2026 · quartzmail.ai · its alternatives →
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Zero▲845Hi HN, I’m Nizar, and I’m building Zero (https://0.email) — an AI-powered email client that manages your inbox for you. Email hasn’t changed in decades, even though the way we work has. The average knowledge worker now spends close to 30% of their week on email, constantly reacting, replying, and sorting through noise. It’s become one of the biggest productivity sinks in modern work. At the same time, AI has transformed how we write, plan, and collaborate — yet our inboxes are still stuck in the past. I built Zero to fix that. Zero automatically prioritizes, organizes, and even…
2025 · 0.email · its alternatives →
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AI with accurate replies that tackle the next-step tasks
Feb 2026 · revo.ai · its alternatives →
- 12
Schedule meetings without leaving your inbox
2018 · calendly.com · its alternatives →
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Calendly 2.0▲197Easily schedule meetings without the back-and-forth emails
2021 · calendly.com · its alternatives →
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Effortless newsletter success with AI power
2023 · valerianotion.gumroad.com · its alternatives →
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Talanoa▲346Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…
21d ago · talanoa.email · its alternatives →
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AI Agents & Email deliverability experts on your team
Jul 2026 · mailadept.com · its alternatives →
- 19
Taurin▲328TL;DR: Taurin is an AI-powered, local-first email client that helps you clear your inbox faster and smarter. We’re building a Personal Agent that learns and adapts to your workflow and integrating it deeply into the email experience so you can reach your maximum productivity. What we currently support • Automatically determine the importance and reply-needs for each email and provide a dedicated view • Organize all conversations and files exchanged with a specific contact in a sidebar • Track when emails sent via Taurin are opened • Summarize and auto-label emails with customizable options •…
2024 · taurin.io · its alternatives →
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CalBot▲115Carly lets you create custom AI agents with 120+ integrations. Give each agent an inbox, instructions, and tool access for email, CRM, scheduling, research, and operations.
2025 · calbotservice.com · its alternatives →
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TextCraft AI▲181Smart inbox, smart emails - AI at your service
2023 · chromewebstore.google.com · its alternatives →
- 24
Resolve incoming email queries effortlessly with AI
2025 · kommunicate.io · 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 →