Wilson Sonsini

Short answer: if you mean U.S. corporate / M&A / securities work, the “top brands people actually use” are usually Wachtell, Kirkland, Latham, Skadden, Cravath, Simpson Thacher, Davis Polk, Sullivan & Cromwell, Paul Weiss, Debevoise, Weil, Ropes & Gray, Cooley, Wilson Sonsini, Fenwick, Gunderson, Goodwin, DLA Piper, Baker McKenzie, Morgan Lewis — but the best choice depends heavily on the transaction.

Best corporate law firms by use case

My practical top picks

1. Wachtell — best brand for elite public-company M&A, takeover defense and boardroom crisis work.
2. Kirkland & Ellis — the default name for private equity, sponsor-side M&A and high-volume deal work; Vault ranks it #1 for private equity. (legacy.vault.com)
3. Latham & Watkins — probably the best “all-around” global corporate platform: M&A, capital markets, finance, PE and regulatory depth. Bloomberg ranked it #1 in 2025 M&A deal value. (prnewswire.com)
4. Skadden — elite M&A, public company, governance, activism, securities and regulatory-heavy transactions.
5. Cravath — top-tier public M&A, capital markets and blue-chip company counsel.
6. Davis Polk — excellent for capital markets, financial institutions, securities and public-company corporate work.
7. Simpson Thacher — very strong in private equity, M&A, finance and capital markets.
8. Sullivan & Cromwell — strong for complex public-company, financial institution, governance and cross-border work.
9. Paul Weiss — increasingly prominent for public M&A, PE, activism and board-level matters.
10. Cooley / Wilson Sonsini / Fenwick / Gunderson / Goodwin — best cluster for venture-backed startups, tech companies, VC financings and growth-company exits. (legacy.vault.com)

If you mean startup “legal products” people actually use

For simple U.S. startup formation, people often use:

• Clerky — popular for Delaware C-corp startup paperwork; Clerky itself notes it is not a law firm and provides self-help document services. (clerky.com)
• Stripe Atlas — forms Delaware C-corps or LLCs, helps with EIN and related startup setup; Stripe states Atlas is not a law firm and not a substitute for legal advice. (docs.stripe.com)
• Cooley GO — useful free startup resources/templates, but not a substitute for a lawyer on anything nonstandard. (orbit-kb.mit.edu)

Rule of thumb: use Clerky/Stripe Atlas only for clean, standard formation. Hire a real lawyer if you have multiple founders, nonstandard equity, foreign founders, IP issues, a regulated business, investors, debt, SAFEs/notes, acquisition talks, or a cofounder dispute.

How I’d choose

• $1B+ public M&A: Wachtell, Cravath, Skadden, S&C, Davis Polk, Simpson, Paul Weiss.
• PE sponsor deal: Kirkland, Latham, Simpson, Ropes, Paul Weiss, Debevoise, Weil.
• Startup raising VC: Cooley, Wilson Sonsini, Gunderson, Fenwick, Goodwin, Orrick.
• Global transaction: Latham, Skadden, Freshfields, A&O Shearman, Clifford Chance, Linklaters, Baker McKenzie.
• Normal company needing ongoing corporate counsel: DLA Piper, Morgan Lewis, Baker McKenzie, Goodwin, Holland & Knight, Wilson Sonsini, Foley, McGuireWoods.

For expensive legal work, don’t hire the firm name alone — hire the specific partner/team with recent experience in your exact deal type, industry, jurisdiction and counterparty profile.

Corporate law isn't really a "brands or products" market in the consumer sense—it's a professional services industry where reputation, deal experience, and specialization matter most. That said, here's a practical breakdown of the firms widely regarded as the top players that companies actually hire for major corporate work, based on long-standing industry rankings (Am Law 100, Chambers, Vault) and recent recognitions.

Elite "Magic Circle" and Wall Street Firms (M&A, Securities, Corporate Finance)

These are the firms Fortune 500 companies and major private equity funds turn to for their biggest deals:

• Wachtell, Lipton, Rosen & Katz – Consistently ranked as the top M&A advisory firm by deal value, despite being a relatively small partnership.
• Skadden, Arps, Slate, Meagher & Flom – One of the largest and most prestigious firms globally. Skadden was named Law Firm of the Year for Corporate Law by Best Lawyers as part of its 2026 Best Law Firms rankings.
• Sullivan & Cromwell – A go-to firm for large-cap M&A and financial institutions work.
• Cravath, Swaine & Moore – Known for high-stakes litigation and corporate advisory, especially in media and telecom.
• Davis Polk & Wardwell – Strong in capital markets, M&A, and regulatory work.
• Simpson Thacher & Bartlett – A leader in private equity and M&A.
• Cleary Gottlieb Steen & Hamilton – Renowned for cross-border M&A and sovereign/financial regulatory work.
• Paul, Weiss, Rifkind, Wharton & Garrison – Top-tier in litigation and corporate deals, especially activist defense.
• Kirkland & Ellis – The largest firm by revenue globally, dominant in private equity and leveraged buyouts.
• Latham & Watkins – One of the largest firms worldwide, strong across capital markets and M&A.

Global "Magic Circle" Firms (UK-based, International Reach)

• Clifford Chance
• Freshfields Bruckhaus Deringer
• Linklaters
• A&O Shearman (formed from the 2024 merger of Allen & Overy and Shearman & Sterling)

Mid-Size and Regional Powerhouses

Depending on your needs (and budget), firms like Cooley, Wilson Sonsini, Gibson Dunn, and Ropes & Gray are heavily used by startups, tech companies, and private equity clients, and often rank highly in specific niches like venture capital financing or fund formation.

How to Actually Choose

Rather than a single "best," the right firm depends on:

• Deal size/complexity – Wachtell or Skadden for mega-deals; regional firms for smaller transactions.
• Industry specialization – Cooley/Wilson Sonsini for tech/startups; Vinson & Elkins for energy.
• Geographic reach – Magic Circle firms for cross-border European work.
• Budget – Elite firms command premium hourly rates ($1,500+/hour for senior partners), while strong regional firms offer comparable expertise at lower cost.

For a more current snapshot, sources like Chambers USA, the Am Law 100, Vault Law 100, and Best Lawyers' "Best Law Firms" guide are the most credible independent rankings companies actually use to select outside counsel.