Life & fun · alternatives · 2026

24 alternatives to A minimal web-based IMAP client for use on untrusted machines

Access predefined IMAP mailboxes with a browser using one time passwords or a YubiKey - dividuum/one-time-mail

This is a lightweight, web-based IMAP client designed for accessing email on untrusted computers. It runs in a browser and connects directly to IMAP servers, making it suitable for users who need secure email access… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. A minimal web-based IMAP client for use on untrusted machines launched in 2016; newer entries below may have overtaken it.

1. 1IA
   IMAP API – Self-hosted access to IMAP over REST▲125

   2020 · imapapi.com · its alternatives →

2. 2
   Zero▲845

   Hi 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 →

3. 3
   Distributed JMAP and IMAP Servers in Rust▲190

   I am happy to announce Stalwart JMAP [1], an open-source JSON Meta Application Protocol server that aims to be scalable, robust and secure. Some of its key features are: - JMAP Core, JMAP Mail and JMAP over WebSocket full compliance. - IMAP4 rev2/1 support via Stalwart IMAP, an imap-to-jmap proxy [2]. - Scalable and fault tolerant: consensus over Raft, node autodiscovery over gossip and read-only replicas. - RocksDB backend with full-text search support in 17 languages. - OAuth 2.0 authorization code and device authorization flows. - Domain Keys Identified Mail (DKIM) message signing. -…

   2022 · github.com · its alternatives →

4. 4
   A virtual Yubikey device for 2FA/WebAuthN▲166

   A Virtual FIDO2 USB Device. Contribute to bulwarkid/virtual-fido development by creating an account on GitHub.

   2022 · github.com · its alternatives →

5. 5
   IMAP-based message broker client written in Go▲87

   :inbox_tray: IMAP based message broker client. Contribute to mikaa123/imapmq development by creating an account on GitHub.

   2016 · github.com · its alternatives →

6. 6
   EmailEngine▲165

   Access any email account to receive/send emails with an API

   2021 · emailengine.app · its alternatives →

7. 7
   Retriever – Securely share secrets over the internet▲193

   Retriever (https://retriever.corgea.io/), an open-source research project to help users receive secrets and sensitive information without needing a server in the middle. It works by using Public-key cryptography to coordinate the message sharing between the two devices. Read more on why we built it here: https://retriever.corgea.io/why.html

   2024 · retriever.corgea.io · its alternatives →

8. 8
   Mailwork▲88

   Free IMAP mailbox integration for effective email marketing

   2017 · its alternatives →

9. 9
   1SecMail▲112

   Free disposable email that actually arrives in real time

   2025 · tmaily.com · its alternatives →

10. 10
    Cypht – Unique Open Source Webmail▲110

    Cypht is a lightweight, open-source webmail client that combines all your email accounts and RSS feeds into one unified, streamlined inbox. Supports IMAP, SMTP, JMAP, and EWS.

    2016 · cypht.org · its alternatives →

11. 11
    Mailcheap▲123

    Email hosting, dedicated email servers, API-first platform

    2018 · mailcheap.co · its alternatives →

12. 12
    MeSign app▲63

    Automated end-to-end encrypted email client

    2020 · its alternatives →

13. 13
    Emaildrop – a free disposable email service with a GraphQL API▲35

    New to Browserling? Launch real online browsers in seconds for web testing, cybersecurity, and more. Test websites and open URLs safely in isolated browser sandboxes.

    2019 · emaildrop.io · its alternatives →

14. 14
    IMAP API▲3

    Headless email client to access email accounts via REST API

    2021 · its alternatives →

15. 15
    I built a web-based iMessage interface▲45

    send and receive iMessages on anything with a web browser - CamHenlin/iMessageWebClient

    2015 · github.com · its alternatives →

16. 16
    MailDrop, throwaway e-mail addresses, built with Scala and Akka▲81

    Maildrop provides free disposable e-mail addresses for use in web forms, app signups, or any other place you'd like to protect your privacy.

    2013 · maildrop.cc · its alternatives →

17. 17
    EmailPK ▲69

    Instant encrypted email

    2014 · diafygi.github.io · its alternatives →

18. 18
    Isotope Mail Client▲74

    Microservice based mail client built with ReactJS and Spring

    2019 · github.com · its alternatives →

19. 19
    ProtonMail Bridge▲10

    IMAP and SMTP support for ProtonMail accounts.

    2017 · proton.me · its alternatives →

20. 20
    Just Mail▲64

    Secured email platform based on distributed storage network

    2014 · its alternatives →

21. 21
    Marco, a privacy-first, offline-first email client (IMAP-native, no AI)▲6

    Hey HN. I'm Isaac, and I'm building Marco (https://marcoapp.io), a cross-platform email client that works with any IMAP provider. macOS, iOS, and web today. I started Marco because I finally lost patience with Apple Mail, and the email client market has a weird gap. Legacy clients look terrible and/or are not cross-platform. The good ones scan your data or cost $300+/year. And there's a graveyard of startups (Tempo, Big Mail, Caley) who built beautiful products and shut down after a year or two. I made a few opinionated bets early on: 1. IMAP-first, not Gmail API-first.…

    Mar 2026 · marcoapp.io · its alternatives →

22. 22
    BAREmail – minimalist Gmail client for bad WiFi▲44

    I've been frustrated one too many times by terrible airplane wifi and not being able to load Gmail or Superhuman when all I want to do is get a few simple text-only emails out the door. These clients have become pretty bloated with the assumption you've always got great bandwidth. So I vibe coded BAREMAIL. It's open source, has no backend, and you can just set it up for yourself. Takes ~3 mins to setup API access via Google Cloud Platform (thanks for making this not super easy Google!) I tried to maintain nice design and some important keyboard shortcuts without getting to overBEARing.

    Apr 2026 · github.com · its alternatives →

23. 23OS
    Openapi.security, a fast security checker for REST-based API▲15

    tl;dr we released openapi.security, an online tool that performs a dozen of security tests on any given openapi/swagger-based API, with no signup or email required. You can try it here: https://openapi.security My team at Escape (YC W23) is mainly focused on securing GraphQL APIs. For this, we developed a new approach called Feedback driven API Exploration. Basically, we infer the right security tests cases to run using the specification and a carefully crafted in house graph traversal algorithm. (It's a bit long to describe here but we published a more in depth explanation of…

    2023 · openapi.security · its alternatives →

24. 24
    Forward Email – Open-Source Quantum Safe Encrypted Email Service▲35

    Get free email forwarding for custom domains. Send & receive as [email protected] with unlimited aliases, 10GB storage, IMAP/POP3/SMTP & 100% open-source security. Trusted by 500K+ users. Setup in 2 minutes.

    2023 · forwardemail.net · its alternatives →

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 →