Introduction.

You have invented something valuable. Now comes a strategic question that surprises many of our clients: should you patent it, or keep it secret?

Most people assume that patenting is always the right move. In many cases, it is. But trade secret protection is a legitimate, powerful, and sometimes superior alternative — and choosing between the two is one of the most consequential IP decisions a business can make. Get it right and you maximize the long-term value of your innovation. Get it wrong and you may find yourself either locked out of patent protection you could have had, or watching a competitor reverse-engineer something you thought was safely hidden.

This guide explains how both forms of protection work, where each one shines, and how to think through the choice for your specific situation.

What is a trade secret?

A trade secret is any information that derives economic value from not being generally known, and that its owner takes reasonable steps to keep confidential. The formula for Coca-Cola is the classic example. Others include manufacturing processes, customer lists, pricing algorithms, supplier relationships, proprietary software source code, and internal research data.

Trade secrets are protected under both federal law (the Defend Trade Secrets Act) and state law (typically the Uniform Trade Secrets Act). Unlike patents, trade secrets require no application, no government approval, and no registration fee. Protection arises automatically from the moment you take reasonable steps to keep information confidential — and it lasts, in theory, forever.

That last point is worth pausing on: a trade secret can last indefinitely, while a patent expires after 20 years. Coca-Cola’s formula has been a trade secret for well over a century. No patent could have provided that duration of protection.

What is a patent?

A patent, as discussed in our earlier guides, is a government-granted right to exclude others from practicing your invention for up to 20 years in exchange for public disclosure of how the invention works. You must apply, prosecute the application through the USPTO, and meet the legal requirements of novelty, non-obviousness, and utility.

In contrast to a trade secret, a patent is public. Once your application publishes, typically 18 months after filing, the world can read exactly how your invention works. What they cannot do is use it without your permission.

The core tradeoff: disclosure vs. secrecy.

The fundamental tension between patents and trade secrets comes down to one thing: a patent requires you to tell the world how your invention works; a trade secret requires you never to tell anyone.

This tradeoff cascades into every other consideration. Understanding it is the key to making the right choice.

When patents are the better choice.

Your innovation can be reverse-engineered.

If a competitor can purchase your product, take it apart, analyze it, and figure out how it works — your trade secret is not safe for long. Reverse engineering is generally legal in the United States when applied to a product that is publicly sold. If your innovation is embodied in something you sell to the public, trade secret protection is fragile.

A patent, by contrast, prevents a competitor from practicing your invention even if they independently figure out how it works. The right to exclude is not contingent on secrecy, it is backed by law.

This consideration alone makes patents the preferred choice for most hardware products, physical devices, chemical formulations, and any technology where the product itself reveals the method.

You need to attract investors or partners.

As discussed in our guide on IP value, many investors — particularly in life sciences, medtech, and deep tech — require patent protection before committing capital. A trade secret is invisible to an investor conducting due diligence. They cannot evaluate it, value it, or rely on it as a durable competitive barrier.

Patents, by contrast, are public, auditable, and independently verifiable. An investor can read the claims, assess the scope of protection, and form a view on defensibility. That transparency is a feature, not a bug, when you are trying to raise money.

You want to license your technology.

A license is a grant of permission to practice your patent. Without a patent, there is nothing formal to license. You can attempt to share a trade secret under a licensing agreement with strict confidentiality obligations, but once a trade secret is disclosed, even under contract, you have lost control of it in a way that is difficult to recover. A single breach, a single disgruntled employee at a licensee, and your secret is gone.

Patents are purpose-built for licensing. They are well-defined, enforceable rights that can generate royalty streams, form the basis of joint ventures, and be bought and sold like any other property.

Your industry moves quickly.

In fast-moving technology sectors, the risk of independent discovery is high. If five other teams around the world are working on the same problem you are, trade secret protection offers cold comfort and it provides no rights against someone who independently invents the same thing. A patent, once filed, establishes a priority date that defeats even a simultaneous independent inventor who files one day later.

In a competitive innovation race, filing first matters. A trade secret provides no protection whatsoever against a competitor who gets to the same place independently.

You are building a company to sell.

If an acquisition is part of your exit strategy, patents almost always increase your valuation more than trade secrets. Acquirers know exactly what they are buying when they acquire a patent portfolio, which is a defined set of enforceable rights with known expiration dates, known claim scope, and known prosecution history. Trade secrets are harder to value, harder to transfer cleanly, and carry the ongoing risk that they have already been compromised without the seller’s knowledge.

When trade secrets are the better choice.

Your innovation cannot be patented.

Some valuable innovations do not meet the legal requirements for a patent, perhaps they are not novel enough, or they involve naturally occurring phenomena, or they are business methods that face significant eligibility hurdles. If you cannot get a patent, a trade secret may be your only option for protecting the value of what you have developed.

The innovation is a process, not a product.

Manufacturing processes, proprietary formulas, and internal methods are often strong candidates for trade secret protection — particularly when the output of the process does not reveal the process itself. If you manufacture a chemical compound whose final form gives no hint of how it was made, a trade secret over the manufacturing method can be extremely durable and effective.

This is precisely why some pharmaceutical and chemical companies choose to keep certain synthesis processes as trade secrets rather than patenting them, even when they would be patentable. The patent would require disclosing the process, after which competitors could use it freely the moment the patent expires. A trade secret, if held tightly, never has to expire.

The 20-year patent window is not long enough.

For some innovations, such as foundational processes, core recipes, essential know-how, the potential commercial value stretches far beyond 20 years. Patenting would disclose the innovation to the world, provide 20 years of exclusivity, and then leave the invention freely available to all competitors in perpetuity.

If you are confident you can maintain secrecy indefinitely, and if the value of the innovation persists beyond the patent term, a trade secret can provide superior long-term protection. This is the Coca-Cola calculation: the formula has been worth protecting for over 130 years, far beyond any patent term.

Your competitive advantage lies in continuous improvement.

Some companies compete not on a single patentable invention but on an ongoing accumulation of operational knowledge, refined processes, and institutional expertise that is constantly evolving. This kind of rolling, living know-how is difficult to capture in patent claims, by the time an application is drafted and filed, the innovation has already moved forward. Trade secret protection, applied broadly to the company’s knowledge base, may be a better fit for this kind of continuously evolving competitive advantage.

The risks of trade secrets you must understand.

Trade secrets carry risks that patents do not. Before choosing this path, every business owner should understand them clearly.

Independent discovery provides no protection. If a competitor independently invents the same thing, they are free to use it — and to patent it themselves, potentially blocking you from practicing your own innovation. A patent prevents this. A trade secret does not.

Misappropriation is hard to prove and hard to remedy. If a former employee takes your trade secret to a competitor, you may have a legal claim — but proving misappropriation in court is expensive, time-consuming, and uncertain. The secret, once disclosed, cannot be unspilled. A patent infringement claim is in many ways cleaner: either the competitor is practicing your claimed invention or they are not.

A single leak can destroy your protection entirely. One disgruntled employee, one improperly secured server, one conference presentation where someone said a little too much — and your trade secret may be gone forever. Patents, once granted, are not vulnerable in this way.

You bear the full burden of maintaining secrecy. Trade secret protection requires ongoing vigilance: confidentiality agreements with employees and contractors, access controls, security protocols, regular audits. This is not a one-time cost — it is a permanent operational commitment. Many companies underestimate what it actually takes to maintain a trade secret properly, and discover too late that their protection has been compromised.

Can you use both? Sometimes, yes.

Patents and trade secrets are not always mutually exclusive. In some cases, a layered strategy makes sense.

A company might patent the core architecture of a product — protecting the fundamental innovation that can be reverse-engineered — while maintaining trade secrets over the manufacturing process used to produce it. A pharmaceutical company might patent a drug compound while keeping the most efficient synthesis route as a trade secret. A software company might patent key algorithms while keeping training data, model weights, and internal benchmarking results as trade secrets.

The key is to be intentional. Decide which aspects of your innovation benefit from public, enforceable exclusivity, and which benefit from permanent secrecy, and build a strategy around that distinction.

A decision framework: questions to ask yourself.

When evaluating whether to patent or protect as a trade secret, work through these questions with your patent attorney/agent:

1. Can this be reverse-engineered from the product? If yes, lean toward a patent.

2. How long is the commercial value likely to last? If longer than 20 years, trade secret may offer superior duration.

3. Are you planning to license or sell the technology? If yes, patents are far better suited.

4. Are you planning to raise institutional capital? If yes, patents are strongly preferred by most investors.

5. Can you realistically maintain secrecy? If the innovation will touch many employees, contractors, or partners, secrecy is harder to maintain than you think.

6. Is independent discovery a realistic risk? If others are working on the same problem, a patent priority date is your only true protection.

7. Is the innovation patentable? If there are eligibility or novelty concerns, a trade secret may be the only option.

The bottom line.

Patents and trade secrets are both legitimate, powerful tools — and the choice between them is one of the most important strategic IP decisions your business will make. Patents offer public, enforceable exclusivity for 20 years and are essential for licensing, fundraising, and defending against reverse engineering. Trade secrets offer theoretically unlimited duration and immediate, low-cost protection, but they are fragile, require permanent vigilance, and provide no defense against independent discovery.

Most businesses should be thinking about both, not choosing one and ignoring the other. The goal is a coherent IP strategy that matches your protection tool to each innovation’s specific characteristics, competitive risks, and business objectives.

Fearn can help you decide what aspects of your technology should be patented and which should remain a trade secret. This is exactly the kind of strategic conversation we have with our clients from the earliest stages of building their business. The right time to make these decisions is before you disclose, not after.

This article is intended for general informational purposes and does not constitute legal advice. IP strategy is highly fact-specific and depends on your industry, competitive landscape, and business goals. You should consult a registered patent attorney/agent regarding your particular invention and circumstances.