Eton is a team of ex-Gunderson Dettmer lawyers who provide fast, defensible 409A valuations to Detroit startups at all stages of growth.















For early stage startups, we provide audit-defensible 409A valuations founders can trust at affordable rates.
For late stage startups, we provide professional rigor, a hands on partnership, and a full suite of valuation services your finance team can lean on.
You can’t afford delays. We deliver audit-ready 409A valuations in days, not weeks, including a 1-day expedited option, without relying on automation or templates.
Every report is prepared and signed by qualified appraisers. That means full Safe Harbor protection and peace of mind knowing your valuation will withstand IRS or auditor review.
Our team of ex-Big-4 consultants and Stanford-trained lawyers combines global technical depth with personal, responsive service. You get the same rigor as major firms, at a startup-friendly cost and with the accessibility and communication founders need to feel supported.
With over 10,000 valuations delivered and a perfect audit record, our reports consistently stand up to auditor and IRS review. But should challenges ever arise, our team will be by your side defending your valuation with the same rigor it was built.
Early-stage or late-stage, we cover everything from simple seed valuations to complex multi-round or pre-IPO structures. Beyond 409A, we also handle ASC 718, M&A, purchase price allocations, and gifting valuations, giving you one trusted partner for every stage of growth.






















Eton is a full-service business valuation firm. We provide 409A valuations for 100s of top companies in Detroit, but we also do complex securities, portfolios, pensions, and the full suite of business valuations.
Our 409a valuations cost between $2500 and $4000. Read our full article here to understand how costs work.
Our 409a valuation services take 10 days as standard. However, when needed, we can do it in as little as one day but an expedited timeline does come at a higher 409a valuation cost. Read more about our timelines here.
Early-stage startups should perform their first 409A valuation before granting any stock options to employees or other stakeholders. By obtaining an accurate 409A valuation before issuing stock options, startups can ensure compliance with IRS regulations and minimize the risk of tax penalties. Additionally, startups should update their 409A valuations at least once every 12 months or more frequently if there are significant changes in the company’s circumstances or market conditions. Read about our 409a valuation process here.