Not a CRM.
Marcus doesn't replace your stack. It sits on top of it. Gmail and Slack are still your interface.
now onboarding founders for q2
a stoic teammate who learns your startup and helps you find your customers.
Marcus is an AI thinking partner for solo founders pre-PMF. Joins your stack. Calls you Mondays. Tells you the truth. $99 a month.
147 founders on the waitlist
# founder-standup
good morning. three replies from yesterday's outreach.
drafts are in your inbox. one of them is worth your full
attention before coffee.
👀 1
☕ 1
what marcus does
four jobs. nothing more. nothing less.
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Calls you Mondays at 9am
A real outbound call. Eight questions about what shipped, what broke, who replied. You talk, marcus listens.
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Reads your replies, drafts in your voice
Every reply gets a draft response back in Gmail Drafts. Mirrors your cadence, your phrasing, your typos.
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Finds new ICP-fit accounts daily
Pulls 10-20 fresh accounts every morning that match your thesis. With names, roles, and a reason to reach out.
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Tells you when your thesis is dying
Tracks reply rate, intent signals, churn from your hypotheses. When the data says pivot, marcus says so. Plainly.
how it works
from signup to a full thesis doc in under 30 minutes.
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01
Sign up with Google.
Marcus gets permission to read and draft email. No send access. Ever.
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02
Marcus calls you within 5 minutes.
Eight questions about your startup. ICP, product, what's working, what hurts.
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03
By the time you hang up…
Your thesis doc, target accounts, and first 5 cold emails are sitting in your inbox.
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04
Every Monday at 9am, marcus calls back.
Learns what worked. Adapts. The thesis doc versions forward.
what marcus is not
things we're proud not to be.
Not autonomous.
Every email lands in Gmail Drafts. You hit send. Your name on the outreach, your judgment in the loop.
Not an SDR.
Marcus is a thinking partner, not a pipeline factory. The job is to help you figure out who your customer even is.
manifesto
"You have power over your mind — not outside events.
Realize this, and you will find strength."
— Marcus Aurelius, Meditations
Solo founders die alone. Not from lack of ideas. From lack of a thinking partner who shows up every day and asks the same hard question: who is this for, really?
I built marcus for me. I was a solo founder at Masker.dev, drowning in code, forgetting to follow up with the eighteen founders who replied to my last outreach wave. The product worked. My GTM was a shoebox of half-finished threads.
Hiring a real PM is $150k a year and a three-month process. What I needed wasn't a hire. I needed someone who reads my Gmail, knows my thesis, and on Monday morning — before I get back into the code — tells me what the data is actually saying.
The name is borrowed from a Roman emperor who wrote a journal to himself every night for twenty years. Stoic. Honest. Allergic to flattery. That's the voice. Marcus tells you what's true, not what you want to hear. When your thesis is working, you'll know. When it isn't, you'll know that too.
If you're a solo technical founder pre-PMF, this is for you. If you have a five-person GTM team, it isn't. That's fine. Most software shouldn't be for most people.
Navi
pricing
cheaper than a contractor. better than a Notion doc.
Founder
For pre-revenue founders.
$99 /mo
- Weekly voice standup (15 min)
- Gmail co-pilot & reply drafting
- Daily ICP account finder
- Slack integration
- Versioned thesis doc
Seed
Post-seed, GTM scaling.
$299 /mo
- Everything in Founder
- Unlimited voice minutes
- Priority support (Slack DM with Navi)
- Custom workflows & integrations
- Multi-thesis tracking
First 50 founders get $49/mo forever. Annual billing only at launch.
faq
honest answers.
Why "marcus"?
Marcus Aurelius wrote Meditations as a journal to himself — not to be published, not to perform. Honest, stoic, allergic to flattery. That's the voice we want. A teammate who tells you what's actually happening, not what you want to hear.
Will marcus send emails without my approval?
No. Drafts only. You press send. We never get send-scope from Gmail.
What if I'm in healthcare and have PHI in my inbox?
Tell us at signup. We use Masker.dev (yes, the founder's other startup) to redact PHI before our LLMs ever see it. If you don't want that, don't sign up.
Who builds this?
A solo founder (Navi) who got tired of being alone with his thesis. Ex-Amazon, 7 years on FX payments at $12B/year scale.
What models does marcus use?
Claude Sonnet for reasoning. Haiku for classification. Perplexity for web research.
Can I cancel anytime?
Yes. Monthly billing. Cancel from the dashboard. No retention call, no dark patterns.
Is my data used to train models?
No. Your data stays in your tenant. We use API endpoints with no-training flags on every provider.
get on the waitlist.
Onboarding 10 founders a week starting June 2026.
147 founders ahead of you.