An Inside Peek at How Other People Prenup, with Neptune CEO Sol Lee
by Caitlyn Driehorst
Caitlyn Driehorst is a financial advisor at RightWise Wealth, as well as the firm's founder and CEO. Caitlyn began her career at the Boston Consulting Group and held strategy roles at MGM Resorts, Capital Group American Funds and two venture-backed wealth startups. She holds a B.A. from the University of Chicago and an M.B.A. from UC Berkeley's Haas School of Business.
Published: August 27, 2025
Sol Lee
Sol Lee is the CEO and co-founder of Neptune. Before founding Neptune, Sol worked in venture capital and in payments at Uber and Mastercard. She lives in New York City with her fiance (and soon-to-be-husband!) — with whom she proudly has her own prenup.
When my husband and I got our prenup, I was lucky to have a great referral for an attorney. My husband, who found his representation on Yelp, was not impressed with the support he received; we ended up leaning heavily on my excellent attorney to paper our agreement and move the process forward, while his counsel’s erudition was primarily monosyllabic (“uh, yeah, sure, so, cool.”)
Hiring an attorney is tough: a lawyer friend explained to me that the “worst” attorneys often advertise heavily and invest in their online presence, whereas the “best” attorneys are often minimally online since they build their business via referrals. A broad generalization? Probably, but consistent with my “n of 1” experience.
Sol Lee is building Neptune, a prenup concierge, to help solve this problem. First, couples can use Neptune’s AI tool to sharpen their understanding and get the “dumb” questions out of the way before an attorney’s hourly billing clicks on. Then, Neptune refers clients to a vetted attorney within their network to create and finalize their ultimate agreement.
Sol and RightWise are partnering for a special “collab” version of our signature “Money and Matrimony” webinar (register here!) and we caught up recently to talk about her business.
Sol! It’s been wonderful to meet you and get to co-deliver our webinar, “Money & Matrimony,” together. I’m excited that we’re bringing back this session. Can you share a bit about you, about Neptune, and how you work with couples?
Likewise! These “Money & Matrimony” webinars have been fun and I always learn something new.
When I went through the prenup process myself, it felt awkward and lonely because I didn’t know anyone else who had done one. The process with my now-husband was difficult not because we didn’t agree that we wanted one, we didn’t know what to do!
But once we worked through it, it became one of the most valuable things we’ve ever done for our marriage. It forced honest conversations about the future we want to build together and how much it would cost.
That experience led to Neptune. We give couples the structure I wish we’d had. Our AI‑guided conversation helps you align on what you want in your prenup and how you’ll manage money together. Then we connect you with curated family law attorneys to finalize the agreement.
Prenups are just the first chapter. Money comes up in every stage of life: marriage, careers, kids, liquidity events, caregiving, etc. We want couples to feel equipped to navigate those moments together.
Do you tend to see more brides or more grooms initiating the process on your site? How do you tend to see those groups show up differently in the process? Of course I’m asking you to generalize and stereotype; I apologize in advance.
Great question! With Neptune, 42% of initiators are women, and that share is rising. I actually looked for more data on this and a Pew Research study from 2023 shows that 45% of marriages today have a woman who is the breadwinner in the family.
This coincidentally is in line with our own stat on prenup behaviors by gender. While I can't say there's a 100% correlation between our data and the Pew data, I'll go out on a limb and say the data seems to suggest that women and men are roughly equally inclined to get prenups if they are the breadwinner.
What we also see is it’s less about who “cares more about money” and more about who’s ready to start an important conversation. Often, that’s women—especially when they’re leading on financial planning, caregiving, or long‑term security.
The bottom line is that initiation tends to correlate with breadwinner responsibility, not gender. The partner with more financial exposure - equity comp, home ownership, inheritance - often wants to align early and set clear rules.
Our article continues below this exciting webinar opportunity
Register for our webinar “Money & Matrimony: Prenups, Joint Assets, Taxes.”
How does getting married change your taxes? If you did divorce, would you owe half your spouse’s student loans? Who keeps the condo you bought before you met? And of course, what should you know if you’re thinking about a prenup or postnup?
Whether you're getting married, thinking of not getting married, or married already and curious as to what did happen when you signed those papers, our goal is that you’ll walk away understanding the financial implications of walking down the aisle.
Can’t make it this time? All registrants will receive a recording of the session, but we invite you to attend the live session to ask questions and download the accompanying hand-outs.
At RightWise, I’m proud that we serve many types of households. How can the prenup objectives or process be different for same-sex or otherwise non-hetero marriages?
We’ve looked at these numbers! Roughly 12% of Neptune prenups to date are from LGBTQ+ or non‑hetero couples, and with the recent political climate, a lot more couples are thinking more carefully about what protections are guaranteed, and where they might need extra backup.
One thing we have seen with LGBTQ+ or non‑hetero couples on Neptune is that many are already in domestic partnership. Depending on which state you live in, a domestic partnership can have varying degrees of interaction with a prenup, so it’s always important to understand how those state laws apply to your relationship.
A prenup can’t replace the rights that come with marriage, but it can create clear agreements around finances, property, and support. So even if the broader legal landscape changes, a prenup still carries weight. It’s one way couples can protect what they’ve built together, no matter what.
I hated my prenup process. I’m glad we did it; it was helpful for our marriage; but it still made me really stressed. I do actually regret some of the snark I gave my husband’s bro-ttorney. What advice do you give for those of us who see the importance but dread the whole thing?
Oh, I get it. I’ve been there too. It’s not easy. I like to think of it like training for a marathon. You don’t just show up on race day without stretching or preparing, or you’ll end up hurting yourself.
The same goes for prenups. Give yourself plenty of time. And I don’t mean with your separate lawyers, but with yourselves.
Carve out a little time to get organized before you dive in. Review your assets, think about how you feel about the relationship right now, and get clear on what you want for the future. That preparation makes the whole process less overwhelming and in a way, it can be fun.
And bumps in the road are normal. They’re not a red flag; they’re a sign you’re doing the real work to build a stronger future.
Do you see many clients looking for post-nups? What usually instigates those conversations? How does the process differ from prenups?
Yes, we see couples coming to us for postnups.
There are two common paths: 1) the couple that just didn’t get to the prenup in time before the wedding or 2) there’s a major life shift, like a new business, an inheritance or kids.
The postnup process is quite similar to a prenup: the couple align on terms, then formalize with an attorney. The main difference is that you’re doing it within the context of an existing marriage, which in full transparency, can make the conversations feel a bit different emotionally.
But the level of protection and clarity you walk away with is just the same.
There’s obviously a lot of hype around AI, but also some startling useful applications. How does Neptune use AI (no buzzwords allowed!) and how do you see it help couples on your platform? Where do you see its limitations?
We keep it really simple and practical. Neptune’s AI is trained on state-by-state marital law and acts as a guide and educator before you engage with legal counsel. It captures the facts that matter, highlights points for further partner alignment, and packages a clean summary so our attorneys can draft or review the prenup with clear expectations.
What it’s not: a lawyer or a substitute for legal advice. We don’t believe family law attorneys should be replaced by AI. The value is alignment and preparation so your time with attorneys is focused on judgment calls, not basic intake.
Your LinkedIn series on how “Sex and the City” characters may have written prenups is fantastic; they genuinely made me laugh, plus you captured the heart inside stories like how the “Absolut hunk” supported Sam through her cancer. (I do not acknowledge any sequels as canon.) How did you get the idea for this series of posts? What has the reception been like?
Thank you! I had so much fun with those. The idea came from wanting to make prenup conversations less intimidating, and a little playful.
Sex and the City is such a cultural touchstone when it comes to love, money, and independence, so it felt like the perfect lens to reframe prenups and help people understand how it can affect different types of relationships.
The response has been amazing. People love seeing prenups presented in a way that’s funny, approachable, and still heartfelt. It shows that these agreements aren’t just “cold contracts”, but rather something that reflects the reality of building a life together.
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