Anja Pich is a commercial lawyer and the Managing Lawyer at Lawpath. She practises across all areas of commercial law and advises businesses of every size, from first-time founders to established companies, on their legal, regulatory and commercial needs.
The one way vs two way NDA question comes down to who is handing over the secrets. A one-way NDA (also called a unilateral NDA) protects one party’s confidential information. A two-way NDA (a mutual NDA, bilateral NDA or MNDA) binds both parties to protect each other’s.
Most founders grab whichever template is closest, or sign whatever the other side emails over. That’s how people end up promising to guard someone else’s secrets while their own go unprotected. Picking the right one takes about two minutes once you know what to look for.
- Choose based on which way the information travels. If only you are disclosing, use a one-way NDA. If both sides will share, use a two-way (mutual) NDA.
- MNDA, mutual, two-way and bilateral all mean the same thing. One-way, unilateral and non-mutual all describe the single-discloser version.
- Read the definition, not the heading. A document titled “Mutual NDA” can still protect only one side if its definition of confidential information is one-sided.
- Set two time limits, not one. A fixed period (three to five years is common) for general information, plus protection for trade secrets while they stay secret.
- An NDA opens the conversation. It doesn’t close the deal. Liability, IP ownership and payment terms belong in the contract that follows.
What is a two-way (mutual) NDA?
A two-way NDA, better known as a mutual NDA, is a contract where both parties agree to keep each other’s confidential information secret and to use it only for an agreed purpose. Each side is a discloser and a recipient at once. So the obligations run in both directions.
That’s the whole mutual NDA meaning in one line: everyone who shares is protected, and everyone who receives is bound. You’ll also see it called a bilateral NDA, a mutual confidentiality agreement or an MNDA. Same document, different label.
Mutual NDAs suit deals where information genuinely flows both ways. Think joint ventures, supplier talks where they share pricing and you share volumes, cofounder discussions, or a business sale where the buyer reveals its funding while the seller opens the books.
What is a one-way (unilateral) NDA?
One-way NDAs work the other way around. Only one party (the discloser) shares confidential information, and only the other party (the recipient) promises to keep it confidential. You’ll also see them called unilateral or non-mutual NDAs.
Use it when information travels in one direction only. A product demo to a prospective partner. A recipe handed to a contract manufacturer. Your customer list and brand files given to a freelance designer.
The big advantage for the discloser is that you aren’t signing up to protect anything of theirs. That sounds minor. It isn’t, and the next section explains why.
One way vs two way NDA: what’s the actual difference?
| One-way (unilateral) NDA | Two-way (mutual) NDA | |
|---|---|---|
| Who discloses | One party | Both parties |
| Who is bound | The recipient only | Both parties |
| Also called | Unilateral, non-mutual | Mutual, bilateral, MNDA |
| Best for | Demos, contractors, manufacturers, investor due diligence | Joint ventures, cofounders, supplier evaluations, SaaS pilots, business sales |
| Risk if you pick wrong | Anything they later share with you isn’t covered | You take on obligations for information you may never need |
| Negotiation speed | Fast if the recipient accepts it, slower if they ask for reciprocity | Quick, because it feels balanced to both sides |
Most of the wording in a one-way and a two-way NDA is identical. What changes is who carries the risk.
Under a mutual NDA you’re a recipient too, so everything they show you becomes something you can be accused of misusing. If you both work in the same industry, that can make it harder to prove later that you came up with an idea yourself. Founders rarely think about this until a competitor-adjacent partner says “we had that on our roadmap first”.
MNDA vs NDA: is there any difference?
Not in substance. “NDA” is the umbrella term for any non-disclosure agreement. An MNDA is simply the mutual version. So when people search “MNDA vs NDA”, they’re really asking the one way vs two way NDA question.
Here’s the catch. The heading on the document proves nothing. We regularly see agreements titled “Mutual Non-Disclosure Agreement” where the definition of confidential information only covers one company’s material. In practice, that’s a one-way NDA wearing a mutual label.
So skip the title and go straight to two clauses. Who is a “Discloser”? And whose information falls within “Confidential Information”? If the answer to both isn’t “either party”, you don’t have a true MNDA.
One way or two way NDA: which one do you need?
Find your situation below. If yours isn’t here, ask yourself one thing: can you name a specific piece of their information you need protected? If you can’t, you need a one-way NDA template.
| Situation | Use | Why |
|---|---|---|
| Pitching to angel investors or VCs | One-way, if they’ll sign at all | Investors have little to disclose at pitch stage, and plenty won’t sign NDAs for early meetings. Hold back the technical detail until due diligence. |
| Demoing software or a product to a prospective partner | One-way | Only your platform is on show. Keep the purpose tied to evaluating it. |
| Running a B2B SaaS pilot or trial with a business customer | Two-way | You share your roadmap and security setup. They share workflows, sample data and security questionnaires. |
| Engaging a freelancer or contractor | One-way, plus a contractor agreement and IP assignment | The NDA protects what you show them. It doesn’t make you the owner of what they create. |
| Briefing an overseas manufacturer | One-way, with non-use and non-circumvention terms | Confidentiality alone won’t stop a factory making your design for someone else. |
| Evaluating suppliers who send pricing, insurance and certifications | Two-way | Both sides are handing over commercially sensitive material. |
| Exploring a joint venture or partnership | Two-way | Information flows both ways from the first meeting. |
| Bringing on a cofounder or adviser | Two-way | They bring their own know-how and contacts, not just access to yours. |
| Selling your business | Two-way, or one-way protecting the seller | The buyer sees your books. You may see their funding and integration plans. |
| Hiring employees | Neither, in most cases | Confidentiality belongs in the employment contract. |
| Three or more parties | Multilateral (mutual) NDA | One document binds everyone, instead of a stack of separate NDAs. |
Investors deserve a special mention. Asking a venture fund to sign an NDA before a first pitch can read as inexperience. Funds see hundreds of similar ideas and can’t risk being tied up by one of them. Pitch the problem, the traction and the team. Keep the source code, formulas and customer data for later.
Mutual NDAs for B2B SaaS businesses
SaaS is the clearest case for a two-way NDA. From the first serious demo, information moves in both directions. You show product roadmaps, pricing logic and your security architecture. The customer hands over its workflows, integration requirements and, before long, a security questionnaire full of answers about its own systems.
Use the NDA to cover the sales conversation and the pilot. Then let your subscription agreement or master services agreement take over once the customer signs. SaaS founders building their contract suite with Lawpath lawyers typically get a mutual NDA drafted alongside the subscription agreement and data processing addendum, for exactly this reason.
One warning. A pilot that runs on real customer data is no longer just a confidentiality question. If personal information is involved, the NDA won’t cover your privacy obligations, so put pilot data terms in writing before the first upload.
Overseas manufacturers: when a one-way NDA isn’t enough
Product founders sending designs to an offshore factory come to our lawyers with the same worries again and again. Will the factory reuse the design for another brand? Sell overruns online? Pass drawings to a sub-factory nobody approved?
Plain confidentiality clauses don’t answer any of that. What you need is a one-way NDA with three extra pieces, sometimes called an NNN agreement: non-disclosure, non-use (they can’t use your designs for their own products or other clients) and non-circumvention (they can’t sell to your customers or channels behind your back).
These traps tend to repeat:
- The factory sends its own “mutual” NDA, even though you’re the only one disclosing anything of value.
- A holding company signs while an affiliated operating company does the actual work and isn’t bound.
- Disclosure to subcontractors is allowed without your written approval.
- The governing law and courts are overseas, which makes enforcement expensive in practice.
- Nothing covers the drawings and samples you sent before anyone signed.
Fix these before you send the detailed tech pack. And think about design or patent protection first. Some IP rights depend on the design not being publicly disclosed before you apply.
Should you send a one-way NDA first and switch to two-way if they push back?
For a lot of deals, yes. The practical answer to the one way vs two way NDA question is sometimes both, one after the other. If you’re the only party disclosing, send a one-way NDA first. If the other side asks for mutual terms, agreeing rarely costs much and keeps the deal moving.
It does cost something when they operate in your space. Once you’re bound to protect their information, watch what you accept from them. Ask them not to send anything confidential unless the purpose genuinely requires it. Keep dated notes of what you already knew before the first meeting.
What you shouldn’t do is spend three weeks negotiating an NDA for a low-stakes coffee meeting. Lawpath lawyers regularly point out that much of an NDA’s value lies in having one signed at all. It sets expectations from day one and puts you in a far stronger position if something leaks.
What should a one-way or two-way NDA include?
Both versions share the same skeleton. Run through this list before anyone signs.
- The right parties. Use the correct legal entity and its ACN (or ABN for a sole trader or trust). Confirm it with the other side directly instead of guessing from a register search.
- A tight purpose. “To evaluate a potential supply arrangement” beats “for business purposes”, because the purpose is what limits how your information can be used.
- A broad definition of confidential information. Cover registered and unregistered IP, plus anything shared verbally or in demos, not just documents stamped “confidential”.
- Standard exclusions. Information that’s already public, already known to the recipient, independently developed, or required by law to be disclosed.
- Who else can see it. Staff, contractors and advisers on a need-to-know basis, with the recipient answerable for them. If your information may pass to a funder or sponsor, require that party to sign an equivalent NDA first.
- Earlier disclosures. If you’ve already shared material, say the NDA covers it.
- How long it lasts, how information is returned or destroyed when talks end, and which state’s law applies.
- A no-licence clause, confirming the NDA doesn’t hand over IP rights or lock either party into a partnership.
Example NDA clauses you can adapt
These are illustrative wording only. Adjust them for your deal, and get a lawyer to check anything high value.
Purpose clause: “The Recipient may use the Confidential Information only to evaluate a potential [supply / integration / investment] arrangement between the parties, and for no other purpose.”
Duration clause: “The Recipient’s obligations continue for three years after the date of the last disclosure, except for Confidential Information that is a trade secret, which the Recipient must keep confidential for as long as it remains a trade secret.”
Earlier disclosure clause: “This agreement applies to Confidential Information disclosed before, on or after the date of this agreement in connection with the Purpose.” Use this whenever conversations started before the paperwork did.
No-licence clause: “Nothing in this agreement grants the Recipient any licence or other right in the Discloser’s intellectual property, or creates a partnership, joint venture or obligation to enter into any further agreement.”
Residual knowledge clause (recipient-friendly): “Nothing in this agreement prevents a party from using general skills, knowledge and experience retained in the unaided memory of its personnel, provided it does not disclose the Confidential Information itself.” Ask for this one when you’re the recipient. Think twice before accepting it when you’re the discloser.
What we see in Lawpath consultations about NDAs
One-way vs two-way NDA questions turn up in Lawpath legal consultations constantly. These five patterns come up again and again.
The “one-way” NDA that protects the wrong side
Someone you’re about to partner with sends their standard NDA. Both businesses are about to share sensitive material, yet the document only protects the sender. Our lawyers are blunt about this one: the document isn’t fit for purpose. Send back a two-way NDA rather than trying to patch theirs.
IP clauses hiding in a confidentiality document
One-way NDAs from larger counterparties sometimes say the discloser owns any IP the recipient develops “for the purpose”. That’s an IP transfer dressed up as an NDA. Our lawyers recommend striking it, confirming each party keeps its own pre-existing and newly developed IP, and adding a residual knowledge clause.
Forever is too long, and too vague
Survival clauses that bind the recipient indefinitely to everything are a regular red flag. The fix: a finite period for ordinary information (three to five years after the agreement ends is common) and indefinite protection only for genuine trade secrets.
Watch for a quieter trap too. Some NDAs only protect verbal disclosures if they’re confirmed in writing afterwards. If you’re the discloser, that clause can leave your best pitch meeting unprotected.
Cofounders on a one-way NDA
Founders draft one-way NDAs between the company and a new cofounder more than you’d expect. Our lawyers steer them to a two-way NDA instead, since cofounders and advisers share information in both directions. One-way NDAs suit contractors.
Neither type makes the company the owner of what a cofounder or contractor builds. That takes an assignment of intellectual property. And if the relationship started before the paperwork did, don’t backdate the NDA. State that it’s effective as of the earlier date.
Signed by the wrong person, with blanks left in
Directors sign in their own name instead of for the company. Square-bracketed fields (the term, the jurisdiction) go out blank. An ABN sits where the company’s ACN should be. Each mistake is small. Together they give the other side room to argue about who is actually bound, so send a clean, completed document every time.
For more traps worth avoiding, see our guide to the common mistakes startups make with NDAs.
NDA vs MSA vs MOU: which document does what?
These three get mixed up because they all show up early in a business relationship. They do very different jobs.
| Document | What it does | Binding? | When it’s signed |
|---|---|---|---|
| NDA | Protects confidential information shared during talks | Yes | Before the first detailed conversation |
| MOU | Records shared goals and how the parties intend to work together | Generally not, though drafting can change that | Once both sides want to proceed in principle |
| MSA | Sets the legal terms for ongoing work, with each job added by a statement of work or order form | Yes | When the commercial relationship starts |
The typical sequence runs NDA, then an MOU or heads of agreement, then the MSA. Our guide to heads of agreement vs memorandum of understanding explains the middle step.
One thing founders miss: calling an MOU “non-binding” doesn’t guarantee it is. Courts look at the language and the circumstances, not just the label.
Is an NDA enough to protect your business?
No, and it was never meant to be. An NDA covers the early conversation. Once the deal is real, the contract that follows (a supply agreement, services agreement, joint venture or shareholders agreement) needs its own confidentiality clause plus the liability, insurance and IP terms an NDA doesn’t cover.
Check that contract’s “entire agreement” clause too. If it says the new contract replaces all earlier agreements, it can quietly cancel NDA protections you still rely on.
For freelancers and contractors, pair your NDA with a written contractor agreement that covers confidentiality, deliverables and IP from the start.
Even with no NDA at all, Australian law can protect information shared in confidence through the equitable claim for breach of confidence. The catch? You have to prove the information was confidential and shared in circumstances that made that obvious. A signed NDA takes most of that argument off the table.
Two current legal points are worth knowing:
- Personal information. If you share customer or staff data and your business is covered by the Privacy Act 1988 (Cth), an NDA doesn’t replace your privacy obligations. Add a clause covering how personal information is handled and what happens after a data breach.
- Non-compete and no-poach reforms. In September 2026 the federal government released draft legislation to ban non-compete clauses for workers earning at or below the high income threshold ($190,100). It also targets no-poach arrangements between businesses, and it’s intended to apply from 2027 if passed. Confidentiality obligations aren’t the target, so well-drafted NDAs will carry more of the load. Our guide to non-compete clauses covers what’s changing.
That no-poach point matters for mutual NDAs specifically. Plenty of two-way NDA templates include a clause stopping either business from hiring the other’s staff. Once the reforms land, a clause like that could create real competition law risk. If your template has one, get it checked before you send it out again.
Are one-way and two-way NDAs enforceable in Australia?
Yes. Both are legally binding contracts when they’re properly formed, clear about what’s protected and reasonable in scope. A court can award damages or grant an injunction to stop further disclosure.
You may have read that only mutual NDAs have “consideration” because both sides swap information. That’s a myth. In a one-way NDA, the recipient’s promise is given in exchange for access to the information. Want to remove the argument entirely? Sign it as a deed, which doesn’t need consideration.
NDAs fail on drafting: a definition so wide it covers public information, no end date, a purpose clause that says nothing. Signing matters too. Under section 127 of the Corporations Act 2001 (Cth), a company can sign through two directors, a director and the company secretary, or a sole director, and electronic signatures are allowed. Our article on NDA enforceability issues goes deeper.
Frequently asked questions about one-way and two-way NDAs
What is the difference between a one-way and two-way NDA?
A one-way NDA protects information flowing from one party to the other, so only the recipient is bound. A two-way NDA protects information flowing in both directions, so both parties are bound. Pick based on who will actually be disclosing.
What does mutual NDA mean?
A mutual NDA is a non-disclosure agreement where both parties share confidential information and both promise to protect what they receive. It’s the same thing as a two-way, bilateral or MNDA agreement.
What is the difference between an NDA and an MNDA?
NDA is the general term. MNDA means mutual NDA, where both sides are bound. Comparing “NDA vs MNDA” is really comparing a one-way NDA with a two-way one. Check the definition of confidential information to confirm which you’ve got.
Is a unilateral NDA the same as a one-way NDA?
Yes. Unilateral, one-way and non-mutual NDAs are the same thing. One party discloses confidential information, and only the recipient takes on confidentiality obligations.
Should I ask investors to sign an NDA?
You can ask, but many angel investors and VCs won’t sign one for an early pitch. Pitch without the sensitive technical detail. Then use a one-way NDA once they’re doing due diligence on your IP, financials or code.
Can I change a one-way NDA into a mutual NDA?
Yes. Either sign a new mutual NDA that replaces the original, or cover the other party’s information with a second one-way NDA. Replacing it is cleaner. Make sure the new agreement covers information you’ve already exchanged.
How long should an NDA last in Australia?
No law sets a fixed period. Three to five years for general information is common, with trade secrets protected for as long as they stay secret. Indefinite obligations over everything are harder to justify and harder to get signed.
Do I need an NDA with employees?
Not a separate one, in most cases. Confidentiality obligations belong in the employment contract and should continue after employment ends. A standalone NDA still helps for candidates who’ll see sensitive material before they’re hired.
Can one NDA cover three or more parties?
Yes. A multilateral NDA binds every party in one document, which beats signing separate NDAs between each pair. Define each party’s confidential information and the permitted purpose clearly.
Is an NDA the same as an MSA or MOU?
No. An NDA only protects confidential information. An MOU records how parties intend to work together and is generally not binding. An MSA is a binding contract setting the terms for ongoing services. Most deals use the NDA first and the MSA last.
Get the right NDA signed before your next meeting
Lawpath has both versions ready to go, alongside the contractor agreement and IP assignment that tend to follow, as part of a library of 550+ templates used by more than 650,000 Australian businesses. If the other side sends you their NDA instead, a Lawpath lawyer can review it for a fixed fee so you know exactly what you’re signing.
Picking between a one-way and two-way NDA is the easy part. Already shared something without an NDA, or signed one without reading it closely? You’re not behind. It’s one of the most common things founders tell our lawyers, and it’s fixable. Work out which way your information is travelling, then get the right agreement signed.
Sharing in both directions? Start your two-way NDA today and have it out for signing in minutes.
