I read every 1-star and 2-star App Store review for the top email apps. The complaints cluster into a handful of categories that most clients keep ignoring.
Isaac Hinman
When we set out to build Marco, we knew we were committing to two very difficult requirements: IMAP-based (not API-based), and cross-platform. We drastically underestimated the complexity of offline-first.
Isaac Hinman
This post is technical in nature, and is the beginning of a series of technical discussions about the world of email, creating Marco, and more.
Isaac Hinman
Every major email app now ships AI features. Here is what each one does, whether you can switch it off, and where the setting lives.
Isaac Hinman
Gmail's AI features sit behind two separate settings. Here is where each one lives, what switching it off removes, and what stays on.
Isaac Hinman
Outlook has a Turn on Copilot switch on most platforms, and it follows your account across devices. Classic Outlook for Windows is the exception.
Isaac Hinman
Apple Mail's AI shows up as inbox summaries, Priority Messages, and personalised Smart Replies. Each has its own switch on Mac and iPhone.
Isaac Hinman
Spark +AI is off by default, but its settings do not sync between devices. Here is how to check and switch it off on each one.
Isaac Hinman
Superhuman switches its AI on and off with a single command. Here is how to find it on desktop and iPhone, and what Superhuman stores while it is on.
Isaac Hinman
Building an email client is one of the worst ideas in software. The graveyard is full of beautiful, well-funded attempts that died within two years. I did it anyway. Here is why.
Isaac Hinman
"If you are not paying, you are the product" has become a cliche people dismiss. But the economics of free email are specific, documented, and worth understanding before you choose a client.
Isaac Hinman
IMAP is the protocol that connects email clients to email servers. Understanding how it works, and where your data goes along the way, explains why privacy varies so much between clients.
Isaac Hinman
You do not need to leave Gmail to stop using Gmail. Marco connects to your @gmail.com address over IMAP. You keep your mail, your contacts, and your address. You lose the ads and the interface.
Marco Team
Hey reimagines email with an opinionated workflow and its own email address. Marco works with your existing address and any provider. The right choice depends on how much you want email to change.
Marco Team
Spark routes your email through Readdle's servers for collaboration and AI features. Here is what that means for your data, based on their architecture and privacy policy.
Isaac Hinman
Canary Mail and Marco both lead with privacy. Canary offers PGP encryption and an AI Copilot. Marco offers offline-first architecture and intentional simplicity. Choose based on which kind of privacy matters more to you.
Marco Team
Thunderbird is free, open-source, and endlessly configurable. Marco is free, opinionated, and designed for speed. The right choice depends on what you value more: control or polish.
Marco Team
This is a process-first guide. Use the 30-minute setup sequence first, then layer rules and weekly maintenance to keep multi-account overhead low.
Marco Team
We cut inbox overhead by simplifying decisions, not adding tools. These five steps are the shortest stable system we have found for everyday email management.
Marco Team
Offline email is not a nice-to-have for heavy users. It is a reliability requirement. Start with symptoms, then implement local-sync workflow in one session.
Marco Team
This comparison starts with scenario fit, not feature checklist. Use it if you are deciding between Microsoft ecosystem depth and a faster, cleaner multi-provider workflow.
Marco Team
After testing provider behavior across real accounts, one pattern is clear: IMAP is hard, but API shortcuts create their own lock-in and privacy costs.
Isaac Hinman
If Apple Mail search feels random, you are not imagining it. Start with symptoms, then diagnose architecture, then pick the shortest fix path.
Isaac Hinman
Superhuman is premium speed software. Marco targets speed plus offline reliability for free. Use this guide if you need a practical decision framework, not feature theater.
Marco Team
After building and testing modern email clients at protocol depth, our view is simple: email itself works. Most pain comes from product decisions layered on top of it.
Isaac Hinman
Marco and Spark are both modern, fast clients, but they are built for different jobs. Decide based on workflow first: individual privacy workflow or collaborative inbox workflow.
Marco Team
We re-tested seven Gmail alternatives with real multi-account inboxes. This guide starts with workflow fit, then gives the shortest path to switch without losing mail.
Marco Team
Most Apple Mail switch requests follow the same pattern: search misses, account juggling, and no web access. This guide starts from symptoms and ends with a migration path.
Marco Team