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Neptune vs Bikel Rosenthal & Schanfield: Prenups in New York, Compared

By Sol Lee
Engaged NYC couple sitting at an outdoor cafe table reviewing prenup planning over coffee on a West Village block in early fall

For New York couples planning a wedding, the prenup conversation usually splits into two very different paths. One path is built for couples who are aligned and want a properly lawyered agreement at a predictable price. The other is built for situations where the negotiation is heading toward a fight: contested asset disputes, custody concerns, or one partner already preparing for divorce-grade tactics. Bikel Rosenthal & Schanfield, a Manhattan matrimonial boutique with a litigation reputation, sits firmly on the second path. Neptune, an AI-led concierge that pairs each partner with independent family law counsel through a $5,000 flat-fee process, is built for the first. The difference is not online versus traditional. It is whether the prenup is a joint planning exercise or a contested negotiation from the first call. This is how the two compare.

Key takeaways

  • Neptune is built for aligned New York couples who want a properly lawyered prenup without two separate hourly retainers. The $5,000 flat fee covers both partners and two independent attorneys.
  • Bikel Rosenthal & Schanfield is a Manhattan matrimonial boutique known for complex, high-stakes divorce, contested custody, and high-conflict family law work. The firm drafts, negotiates, and litigates prenuptial and postnuptial agreements as part of that practice.
  • The two are built for different starting points. Neptune fits couples planning together. Bikel Rosenthal fits situations where the prenup is already contested or tied to broader matrimonial concerns, including reputational risk, complex business interests, or anticipated litigation.
  • New York prenups have to clear a specific execution bar. Under NY Domestic Relations Law Section 236(B)(3), a prenup must be in writing, subscribed by both parties, and acknowledged in the manner required for a deed to be recorded. Independent counsel for each party and full financial disclosure also reduce later challenge risk.
  • Price ranges sit far apart. Neptune is $5,000 flat across both sides. NYC high-stakes matrimonial boutiques bill hourly, with top-tier partner rates running $500 to $1,200 per hour and couple totals often landing between $20,000 and $50,000-plus when each partner hires their own firm.

Neptune vs Bikel Rosenthal: What Sets Them Apart

1. What do they do?

Neptune: Neptune is an AI-led concierge for couples handling the legal and financial admin of a partnership. For prenups, Neptune walks both partners through financial disclosure, values, goals, and the specific terms each side cares about before attorney time begins. Each partner is then matched with independent family law counsel for drafting, review, negotiation, and execution. The product is built to keep the prenup a collaborative planning exercise, not a litigation rehearsal. It is also a long-term partner across the bigger partnership lifecycle: prenup, estate plan, postnup, joint taxes, marriage immigration, and updates as life changes.

**Bikel Rosenthal & Schanfield:** Bikel Rosenthal & Schanfield is a Manhattan matrimonial boutique founded by Dror Bikel and Karen B. Rosenthal, with Naomi Schanfield as the third name partner. The firm's practice is built around complex, high-stakes divorce, contested custody, hidden-asset and forensic accounting matters, business valuations, international and interstate divorce, and prenuptial and postnuptial agreements drafted inside that high-conflict frame.

The firm describes its approach as "early trial-readiness," meaning every matter is prepared as if it could go to court even when the goal is to settle. That posture shapes how prenups are handled, especially when one side expects the negotiation to be contested or when stakes are unusually high.

2. Are lawyers involved?

Neptune: Yes. Each partner works with their own licensed New York family law attorney from Neptune's vetted network. The AI handles intake, document gathering, and early alignment between partners. The lawyers handle everything that requires legal judgment: drafting, review, advising each partner, negotiating revisions, and preparing the agreement for execution. The price is lower because the workflow is more efficient, not because attorney involvement is reduced.

Bikel Rosenthal: Yes, and the model is firm-led from the start. Bikel Rosenthal represents one partner in the prenup conversation. The other partner is expected to retain separate counsel, usually another Manhattan matrimonial boutique with comparable experience. Engagements are typically partner-led, with hourly retainers rather than flat fees.

3. How is the process structured?

Neptune: Both partners begin together inside Neptune. The AI-led intake gathers assets, debts, income, equity, real estate, expected inheritances, and the specific terms each partner wants to address (separate property, spousal support, business interests, startup equity, retirement accounts, future children, sunset clauses, premarital appreciation).

Once the inputs are organized, each partner works directly with their attorney. Because the disclosure is already structured, attorney time focuses on legal judgment: drafting, advising, negotiating revisions, and execution. Most New York couples complete the process in a few weeks to a couple of months.

Bikel Rosenthal: The traditional matrimonial-firm process starts with one partner retaining the firm. The attorney develops that partner's strategy, prepares an initial draft, and exchanges it with the other partner's counsel. From there the two firms exchange revisions, disclosures, and negotiation positions until both sides are ready to sign. The process can take longer and cost more because each step routes through opposing counsel and is billed by time.

4. What does it cost?

Neptune: Neptune's New York prenup is currently $5,000 flat, covering both partners and two independent attorneys. The fee includes AI-led intake, structured financial disclosure, attorney matching, drafting, review, negotiation, and execution support.

The flat fee holds regardless of how many revision rounds the partners need. There is no hourly meter.

Bikel Rosenthal: The firm does not publish prenup pricing. Engagements are typically hourly, and the total depends on the partner staffed, the financial picture, and how contested the negotiation becomes. For broader NYC market context, top-tier matrimonial partner rates often run $500 to $1,200 per hour, with senior partners at the upper end. A standard prenup at a top NYC boutique often lands in the $10,000 to $25,000 per side range for clean negotiations and can scale well beyond that for complex matters.

Because each partner hires a separate firm, the all-in couple cost at this tier typically sits in the $20,000 to $50,000-plus range.

5. Who is it built for?

Neptune: Dual-career New York couples in their late 20s through mid 40s with real but not nine-figure asset pictures. Tech, finance, law associates, physicians, founders pre-Series A, consultants. Most have $500K to $10M in combined assets, including equity, real estate, retirement accounts, and brokerage. The defining trait is that both partners are aligned on getting a prenup and want both sides properly represented under New York's enforceability bar without burning a couple of months of household income on parallel hourly bills.

Bikel Rosenthal: Bikel Rosenthal is built for situations where the matter is already contested, the financial stakes are unusually high, or the prenup is connected to broader matrimonial concerns. That includes prenups for public figures and high-net-worth individuals with reputational considerations, situations involving private business holdings or substantial real estate portfolios, cross-border financial picture, family trust interests, or any case where one side expects the negotiation to be aggressive from the first conversation. If one partner has already hired outside counsel preparing for a divorce-grade negotiation, a litigation-bench matrimonial firm is the right call.

Feature Comparison

Pricing model

  • Neptune: $5,000 flat fee for both partners and two attorneys.
  • Bikel Rosenthal: Pricing not publicly listed for prenups. Engagements typically hourly with partner-led billing.

Independent counsel for each party

  • Neptune: Yes. Built into the model.
  • Bikel Rosenthal: Yes. One partner retains Bikel Rosenthal, the other retains separate counsel, typically another NYC matrimonial boutique.

Financial disclosure handling

  • Neptune: Organized through the platform before attorney drafting begins.
  • Bikel Rosenthal: Traditional disclosure exchange between counsel, often with forensic accounting support for complex pictures.

AI-led intake

  • Neptune: Yes. AI handles disclosure, document gathering, and early alignment.
  • Bikel Rosenthal: Traditional firm process. No AI-led intake identified publicly.

Attorney posture

  • Neptune: Planning-oriented. Built for couples aligned on getting a prenup.
  • Bikel Rosenthal: Trial-readiness posture. Built for contested or high-stakes matters where the firm wants to be prepared to litigate if negotiation fails.

Process pace

  • Neptune: A few weeks to a couple of months for most couples, depending on complexity.
  • Bikel Rosenthal: Depends on the financial picture, opposing counsel, and how contested the negotiation becomes.

Best fit for aligned couples

  • Neptune: Strong fit for couples planning together with meaningful but standard asset pictures.
  • Bikel Rosenthal: Possible, but the firm's bench is built for harder matters.

Best fit for contested or high-stakes matters

  • Neptune: Not the right tool for actively contested prenups or matters tied to anticipated divorce strategy.
  • Bikel Rosenthal: Yes. This is the firm's core practice.

Long-term relationship

  • Neptune: Long-term partner across prenups, estate planning, postnups, joint taxes, marriage immigration, and updates.
  • Bikel Rosenthal: Matrimonial firm relationship that can extend to postnups, contested divorce, custody, and complex matrimonial matters if needed later.

Weighing the Pros and Cons

Neptune

Pros:

  • $5,000 flat fee for both partners and two attorneys.
  • Independent counsel for each partner is built into the process by design.
  • AI-led intake handles disclosure and document gathering before attorney time begins.
  • The flat fee structure removes the unpredictability of hourly billing on standard matters.
  • Built for couples planning together, not adversarial negotiations.
  • Long-term support across prenups, estate plans, postnups, joint taxes, and marriage immigration as life changes.

Cons:

  • Not the right fit for actively contested prenups, divorce-adjacent negotiations, or situations where one partner expects the discussion to turn aggressive.
  • Complex business valuations, family trust interests, or unusual cross-border structures may need additional review or a referral to a traditional firm.
  • Best when both partners are committed to working through a guided process together.

Bikel Rosenthal & Schanfield

Pros:

  • Established Manhattan matrimonial boutique with a deep bench in complex, high-stakes matters.
  • Strong fit for contested negotiations, high-net-worth financial pictures, and prenups connected to broader matrimonial concerns.
  • "Early trial-readiness" posture is useful when one side anticipates that the prenup may eventually be litigated or unwound.
  • Confidentiality and reputational protection is part of how the firm structures matters, which matters for public figures and high-profile clients.
  • Continuity if the matter later evolves into a contested divorce, custody dispute, or postnup negotiation.

Cons:

  • Prenup pricing is not published. Hourly billing makes the total cost hard to know at the start.
  • Each partner pays for a separate firm, which raises the couple total well above flat-fee options.
  • The process can take longer because each step routes through two firms.
  • Litigation-readiness posture is more attorney effort than aligned couples planning together usually need.

Bottom line: Which fits your situation?

Choose Neptune if you and your partner are aligned on getting a prenup, want independent counsel for both sides, and prefer a guided process with a clear flat fee. The product is built for dual-career New York couples planning around equity, real estate, inheritances, income differences, or future children, without the prenup becoming a contested negotiation.

Choose Bikel Rosenthal & Schanfield if the prenup is already contested or you expect it to be. That includes situations where one partner has hired matrimonial counsel preparing for a divorce-grade negotiation, where the financial picture involves private business holdings, hidden-asset concerns, or cross-border complexity, or where reputational risk and confidentiality are central to how the matter has to be handled.

For most New York couples, the question is less Neptune versus Bikel Rosenthal and more aligned-planning versus contested-negotiation. Both paths involve real lawyers. The right one depends on which conversation you and your partner are actually having.

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Frequently asked questions

Is a Neptune prenup enforceable in New York?

Yes, when properly drafted, reviewed, and executed under New York law. The agreement has to be in writing, signed by both partners, and acknowledged in the manner required for a deed, per NY Domestic Relations Law Section 236(B)(3). Independent counsel for each partner and full financial disclosure also reduce the risk of later challenges. Neptune is built around all three: independent attorneys for each side, structured disclosure through the platform, and execution under New York rules.

When is a litigation-focused matrimonial firm the right call instead of Neptune?

When the prenup is heading toward a contested negotiation rather than a joint planning exercise. That includes situations where one partner has retained matrimonial counsel preparing for divorce-grade tactics, where the financial picture involves disputed valuations or hidden-asset concerns, where reputational considerations require unusual confidentiality protections, or where the prenup is essentially a settlement document being negotiated under the shadow of likely future litigation. Firms like Bikel Rosenthal are built for exactly that posture.

Does Bikel Rosenthal publish prenup pricing?

No public flat-fee prenup pricing was found on the firm's site during this review. Engagements appear to follow a traditional hourly model with partner-led billing. Couples considering the firm should ask directly about consultation fees, hourly rates, expected retainers, whether any flat-fee work is available, and what costs the other partner should plan for with separate counsel.

Why is Neptune's $5,000 fee lower than a top NYC matrimonial boutique prenup?

The workflow is structured differently. AI handles intake, financial disclosure, and the early alignment work that traditional firms typically bill hourly. Attorney time is focused on legal judgment: drafting, advising, negotiating, and execution. The price is lower because the billable hours that would have gone to information gathering have been removed, not because attorney involvement has been cut.

Can Neptune handle a prenup if one partner has significant startup equity?

Often, yes. Vesting equity, future grants, expected liquidity events, and how those assets are treated are standard Neptune planning categories. Attorney review still matters because equity terms can be fact-specific. For founders with unusually complex cap tables, outside investors with special rights, or near-term exits, a traditional matrimonial firm with deep business-valuation experience may be the better fit.

What if one partner wants to bring their own outside lawyer?

That can be arranged, but it changes the workflow. Neptune's model is built around two independent attorneys inside the structured process. If one partner prefers outside counsel, the couple should confirm with Neptune how that affects scheduling, document exchange, drafting handoffs, and the flat fee.

Does the choice of firm affect how enforceable the prenup is later?

The choice of firm matters less than the execution. New York courts look at the agreement itself, the financial disclosure, whether each partner had independent counsel, and whether the agreement was signed voluntarily. A properly drafted, properly disclosed, properly executed prenup with independent counsel for each side can hold up regardless of which kind of firm produced it.