Your intros are often what founders remember most.
doubleopt.in works inside WhatsApp, iMessage, and email. It finds who you actually know, drafts each intro the way you would write it, and asks your contact before connecting anyone.
We're working with 10 investors and operators to shape the product before launch.
Every intro you agree to make costs you half an hour before it's ready to send.
Rewriting messy founder blurbs
Founders write the blurb for themselves, so you spend 15 minutes cutting it down and putting it in your own words. Forward it as-is and your contact can tell you didn't really read it.
Remembering who you actually know
Your network is spread across Gmail, LinkedIn, WhatsApp, and X, and very little of it is in a CRM. Working out who you know well enough to ask, and when you last spoke, takes another 20 minutes per request.
The Sunday night bottleneck
With 20–40 portfolio companies, 10+ requests land every week and most of them wait for the weekend. Founders are left waiting on you for the customer, hire, or investor they asked about, and you feel it every time you open your inbox.
How a founder's request becomes a warm intro. You review the draft in WhatsApp or iMessage, and doubleopt.in handles the rest.
It learns who you actually know
doubleopt.in reads your Email, LinkedIn, and X history to understand who you know, how well, and when you last spoke. There's nothing to tag or import.
It drafts the intro in your voice
When a founder emails or texts you an ask, it finds the best person in your network and rewrites their blurb the way you would, in a few short, personal sentences.
You decide in the chat you already use
doubleopt.in messages you in WhatsApp, iMessage, or email. Between meetings you approve the draft, adjust it with a quick voice note, ask the founder for more context, or pass, and nothing moves until you do.
Your contact says yes first
Your contact gets a short note from you where you usually talk and can say yes with one tap, without signing up for anything. Only then does doubleopt.in send the intro to both sides, and two weeks later it asks each of them how it went.
Find out which intros helped, and who in your network keeps showing up for founders.
Two weeks after each intro, doubleopt.in asks the founder and your contact how it went, and it takes each of them one tap to answer. Over time you can see which intros lead somewhere and which people are most generous with their time, so you know who to ask first and who deserves a thank-you.
A record of every intro you've made. So when a founder, co-investor, or LP asks how you help, you can show them.
If you make 300+ intros a year, most of that work ends up buried in old threads. doubleopt.in keeps track of each one by company and outcome, so you can see every customer, hire, and investor you've brought to each founder.
Built for people who would never let an AI email their contacts on its own.
It can only draft
doubleopt.in has no permission to send anything by itself. An email or DM goes out only after you approve that exact message, so your contacts never receive something you haven't read.
Your network stays yours
Your contacts sit in a private, single-tenant vault. They're never pooled with other users or used to train outside models, and founders can't browse them.
You set the limits
Mark LPs, family, or anyone sensitive as Off-limits / Never suggest so they never come up as a match. Every draft is kept in an audit log, and you can revoke access or delete your data in one click.
Frequently asked questions
What is doubleopt.in?
doubleopt.in works inside WhatsApp, iMessage, and email. It finds who you actually know, drafts each intro the way you would write it, and asks your contact before connecting anyone.
Does it ever send messages on my behalf?
No. doubleopt.in has no permission to send anything by itself. An email or DM goes out only after you approve that exact message.
What does "double opt-in" mean here?
Your contact gets a short note from you and can say yes with one tap, without signing up for anything. Only then does doubleopt.in send the intro to both sides.
How does it know who I actually know?
It reads your Email, LinkedIn, and X history to understand who you know, how well, and when you last spoke. There's nothing to tag or import.
What happens to my contacts' data?
Your contacts sit in a private, single-tenant vault. They're never pooled with other users or used to train outside models, and founders can't browse them. You can mark people off-limits, every draft is kept in an audit log, and you can revoke access or delete your data in one click.
Can I use it today?
doubleopt.in is pre-launch. Frankie is working with a small group of investors and operators as design partners. Book a 15-minute call to join.
Help shape doubleopt.in before it launches.
I'm working with a small group of investors and operators to get the mobile flow and privacy model right. Answer three quick questions and pick a time that works for you.
Why I'm building this →