As a CEO with a calendar full of meetings and an inbox that never quite gets to zero, I’ve seen more “productivity hacks” and “smart inbox tools” than I can count. But rarely do I find something as game-changing, and actually enjoyable to use, as Custos.
What is Custos?
Custos is an AI-powered platform designed to take the grunt work out of business email. Rather than simply suggesting canned responses or summarizing threads, Custos connects directly to your inbox and instantly drafts context-rich, personalized emails for you. It analyzes your style, interprets the conversation thread, and produces answers you’d be happy to send. This saves so much time and helps avoid both blank screen syndrome and rushed, shallow replies.
How it works is refreshingly simple:
- Connect your inbox (Gmail, Outlook, etc.)
- Custos automatically creates email drafts for incoming messages, with your style and full context included
- You review, edit if needed, and send
It’s not a note-taker, and it’s not just a reply generator. It actively helps you close the conversation loops that matter to your business.
My Experience: Less Inbox Stress, Better Replies
As someone who receives a constant stream of emails, from client requests to post-meeting follow-ups and daily admin, I’ve been blown away by how much time Custos saves.
No more staring at a blinking cursor after an intense Zoom marathon, trying to remember what that last follow-up was supposed to say.
Custos surfaces the draft right in my inbox, so the only thing left to do is click send (maybe tweak a sentence or two). Replies go out faster, with less cognitive load, and the tone always fits.
What Makes Custos Stand Out?
Here’s what I love, and what other users and even Custos’ CEO Khalil Osman have noted:
- Drafts in your voice: Custos doesn’t churn out robotic one-liners. It learns your writing style, so over time, your emails sound more like you, not like an AI assistant.
- No sponsorship, just genuine impact: I want to be clear: Custos didn’t ask for or sponsor this post, they’re just deserving of a real celebration. When you find a tool this effective, you share it.
- Keeps you on top of vital follow-ups: Ever meant to send a client update but lost it in the post-meeting fog, only to realize at day’s end you forgot? Custos ensures those moments don’t slip through the cracks.
- Iterative improvement: The more you use it, the smarter it gets, further reducing editing time and improving accuracy.
- Built by people who get it: I’ve spoken with Khalil and Joaquin (the brilliant team behind Custos). They genuinely care about solving real business problems, not just chasing the “AI” fad.
- Free – at least for now: It’s astonishing, but as of this writing, Custos is completely free to use. That inevitably won’t last once the word gets out.
Noteworthy User Stories
Khalil Osman, Custos’ CEO, sums it up perfectly:
“We’ve been hearing some amazing stories from people using Custos. Whether it’s saving time, sending better emails faster, or simply avoiding that blank screen moment, it’s been fun to see how everyone is using it in their own way.”
And as another CEO put it (mirroring my own experience):
“Great people building great tools. That’s all I’ve ever wanted in tech… Custos didn’t sponsor this post, they just deserve the celebration.”
Who Should Try Custos?
- Business owners who feel buried by email
- CEOs and founders juggling meetings, client relationships, and growth
- Anyone who wants to reclaim hours lost to email without sacrificing personal touch
- Teams that value brand-consistent, high-quality communication
The Takeaway for Busy Professionals
Custos won’t write your next big proposal or strategy memo, but it will handle the endless stream of routine emails that keep your business running smoothly. By eliminating the friction between “I should reply” and “That reply’s already written,” it’s the rare tool that saves you time and genuinely improves your daily workflow.
It’s free right now, but with the level of value it delivers, I doubt that will be true for long. If an organized, zero-stress inbox with better replies sounds good to you, try Custos today and thank me later.
Is there an email you’ve been waiting to write? Give Custos a try. Great people, great tech, and honestly, it’s just fun to see a tool get this right.
FAQ
What is Custos and how does it work?
Custos is an AI-powered platform that connects to your email inbox and instantly drafts personalized, contextually relevant replies to your messages. It learns your writing style, generates email responses that sound like you, and helps you send follow-ups or replies with minimal effort.
Is Custos free to use right now?
Yes, Custos is currently free while in active development by its founders. This offers a unique opportunity to benefit from its features at no cost before broader rollout or paid pricing.
How does Custos save time for business owners?
Custos eliminates the blank screen syndrome and the backlog from a jam-packed day of meetings by auto-drafting responses you can approve in seconds. That means less time spent thinking about what to say and more time taking action.
Will Custos write emails in my voice and style?
Yes, Custos adapts to your voice. The more you use it, the better it gets at mimicking your natural tone and phrasing, so your messages remain authentic, not robotic.
Does Custos have a learning curve or require setup?
Setup is quick and intuitive – simply connect your inbox. There are no complicated workflows, and most users find they can start getting value almost immediately.
Is Custos a meeting note-taker?
No, Custos doesn’t just process meeting notes. It creates personalized responses to real emails, focusing on action and communication, not just summarizing conversations.
Who are the founders of Custos?
Custos was founded by Khalil Osman and Joaquin Coitino, both passionate about helping people save time and improving business communication with smart technology.
Do I need technical skills to use Custos?
No technical background is required. Custos is designed for busy professionals and business owners who want simple, fast results without extra training.
Is my email data safe with Custos?
Custos is focused on privacy and security. Always review Custos’ privacy policy and terms (on withcustos.com) for specifics about data handling and security measures.
What’s the best way to try Custos?
Simply sign up and connect your inbox while it’s still free. Test it on your daily emails, especially routine follow-ups or threads you’ve been putting off, and experience the time savings for yourself.
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