Founder and Shareholder Agreements for AI Software Companies in New Zealand

AI software companies often move fast, but founder problems usually show up in slow, expensive ways. One founder builds the model, another brings customers, a third funds development, and everyone assumes the ownership split will sort itself out later. That is where trouble starts. Common mistakes include issuing shares too early without vesting, leaving IP ownership unclear when code was written before the company existed, and relying on verbal promises about decision-making, salaries, or exits.

A well-drafted founder shareholder agreement for AI software company businesses in New Zealand can prevent those disputes before they damage the company. It sets clear rules on who owns what, how decisions are made, what happens if a founder leaves, and how sensitive technology, data and trade secrets are protected. For AI startups, the agreement also needs to reflect issues that ordinary small businesses may not face, such as training data rights, model governance, product liability risk, privacy obligations and investor expectations.

Overview

A founder shareholder agreement is the rulebook between the owners of the company. For an AI software business, it should deal with ordinary shareholder issues and also cover the practical reality of code ownership, product development, confidentiality, privacy and future fundraising.

The main goal is simple: reduce the chance that a founder dispute destroys the value of the business when the pressure is highest.

• Confirm who the shareholders are and what each person owns
• Set founder roles, decision-making rules and reserved matters
• Deal with vesting, leaver rules and what happens if someone stops contributing
• Make sure all IP, code, datasets and related materials are properly assigned to the company
• Include confidentiality, privacy and data-use expectations that fit an AI business
• Set transfer rules, pre-emptive rights and drag along or tag along mechanics
• Cover funding obligations, dilution and what happens when new investors come in
• Include dispute resolution steps before relationships break down completely

Why UK Businesses Use Shareholders’ Agreements

Despite the heading, the same commercial logic applies in New Zealand: businesses use shareholders’ agreements because the Companies Act and constitution do not cover every founder issue in a practical way. A private agreement lets founders agree the ground rules before there is a disagreement.

For AI software companies, this matters even more because the value of the business often sits in intangible assets. If the agreement is vague, a dispute about ownership of source code, models, prompts, datasets, customer relationships or product direction can quickly turn into a dispute about the entire company.

They clarify ownership and contribution

Many early stage AI companies are built by people who contribute different things. One founder may write the core software, another may contribute domain expertise, another may bring capital or sales channels. Problems arise when all contributions are treated as equal without documenting what each person is actually responsible for.

Your agreement should state:

• the shareholding split
• whether any founder loans are outstanding
• what non-cash contributions were made
• whether founders must continue contributing time or services
• what happens if a founder stops pulling their weight

This is where founders often get caught. They agree to a 50/50 or 33/33/33 split because it feels fair at the beginning, then six months later one person is doing nearly all the work. Without vesting or leaver provisions, changing that position is hard.

They protect the company if a founder leaves

A founder exit is one of the most common pressure points in a startup. Someone loses interest, takes a job elsewhere, burns out, or disagrees with the company’s direction. If they keep a large shareholding while no longer contributing, that can block fundraising and create long-term resentment.

A sensible agreement usually deals with:

• minimum commitment expectations
• good leaver and bad leaver definitions
• how departing founders must offer their shares for sale
• the valuation method or price formula
• whether unvested shares can be bought back

Investors often look closely at this area. Before you sign with an investor, they may expect to see founder equity tied to ongoing involvement and clean transfer mechanics.

They set decision-making rules

Equal ownership does not automatically mean easy decisions. AI companies regularly face big calls about product pivots, model use, enterprise customer contracts, contractor engagement, data sourcing and funding rounds. If the founders have no agreed process, deadlock becomes expensive quickly.

The agreement should distinguish between:

• day-to-day management decisions
• board decisions
• shareholder decisions
• reserved matters that need unanimous approval or a higher voting threshold

Reserved matters often include issuing new shares, borrowing above a set amount, selling core IP, approving a major contract, changing the business model, or entering a related party arrangement.

They make fundraising easier

Most AI software companies expect to raise capital at some point. Investors usually do not want to inherit messy founder arrangements. A clear shareholder agreement can make due diligence smoother because it shows that the company has already thought through governance, equity, IP and transfer rights.

Founders should expect the agreement to address:

• pre-emptive rights on new share issues
• dilution mechanics
• share classes and investor rights
• drag along and tag along rights
• information rights and reporting expectations

Even if a formal investment round is not happening yet, putting these principles in place early can avoid renegotiating everything under time pressure.

Legal Issues To Check Before You Sign

The most useful time to negotiate a founder shareholder agreement is before the stress point arrives. Once money has been spent, IP has been created, or a founder relationship is already strained, each clause becomes harder to settle.

1. Is the company structure clear?

The agreement should match the legal structure of the business. In New Zealand, most startups use a limited liability company registered through the Companies Office. The share register, constitution and any subscription documents should align with the shareholder agreement.

Check that:

• the correct company is named
• the issued shares match the actual cap table
• any constitution is consistent with the agreement
• director appointments are clear
• any founder loans or convertible instruments are recorded properly

If these documents conflict, the result can be confusion about who has the legal right to approve what.

2. Has all intellectual property been assigned to the company?

For an AI software company, this is usually the single biggest issue. The main risk is that the company thinks it owns the product, but legally some or all of it still belongs to a founder, contractor, prior employer, or third party.

Before you sign, confirm ownership of:

• source code and repositories
• models, weights and fine-tuned outputs where ownership can be assigned
• training data and curated datasets, to the extent rights exist
• product designs, prompts, workflows and documentation
• brands, logos and domain-style business assets
• inventions, know-how and trade secrets

If any founder built the software before the company existed, use a separate IP assignment document if needed. The shareholder agreement can support this, but it may not be enough on its own. Also check whether open source software, API terms, cloud platform conditions or third-party model licences limit commercial use or redistribution.

3. Are founder roles and time commitments documented?

Titles alone are not enough. If one founder is full-time and another is part-time while both hold the same equity, that needs to be a conscious decision, not an unspoken assumption.

Useful points to record include:

• expected weekly commitment
• key responsibilities
• whether founders can work on other ventures
• approval needed for outside work or conflicts
• whether cash salaries are payable and when

This does not replace proper employment or contractor documentation where relevant, but it helps define the commercial bargain between founders.

4. What are the vesting and leaver rules?

Vesting is often the difference between a fixable founder departure and a long-term cap table problem. If shares vest over time, a founder who leaves early does not walk away with the full long-term upside intended for continuing contributors.

Founders commonly negotiate:

• the vesting period
• whether there is a cliff
• acceleration on sale or certain events
• buy-back rights for unvested shares
• different treatment for good leavers and bad leavers

Good leaver and bad leaver definitions need care. If the language is too broad or too harsh, it can create disputes when someone leaves due to illness, family reasons, redundancy after investment, or a genuine business disagreement.

5. How will sensitive data and privacy obligations be handled?

AI businesses often use customer inputs, behavioural data, proprietary business information, and sometimes personal information. A founder dispute can quickly become a confidentiality and privacy problem if there are no clear rules about access, reuse and disclosure.

In New Zealand, privacy compliance can matter from the first enterprise customer onward. The agreement should work alongside your privacy notice and internal data practices, especially where founders have admin access to systems or datasets.

Consider clauses covering:

• strict confidentiality obligations
• permitted use of company data
• security expectations
• return or deletion of data when a founder leaves
• restrictions on using company information in another venture

Privacy Act obligations will usually sit outside the shareholder agreement itself, but the agreement should not undermine them.

6. Are restraint and non-compete clauses realistic?

Founders often want strong protections against someone leaving and building a competing AI product the next week. The law is cautious about restraints of trade, so these clauses should be carefully drafted and reasonable in scope, time and geography.

A restraint that is too wide may not be enforceable. A better approach is usually to define the real business risk, protect confidential information, and tailor any non-compete or non-solicit obligations to what is genuinely necessary.

7. What happens if the founders disagree?

Deadlock clauses matter most when there are only two founders or two equal voting blocs. Without a process, one disagreement can freeze product development, hiring or fundraising.

Useful mechanisms may include:

• escalation to a board meeting
• good faith negotiation between founders
• mediation
• a buy-sell process
• an agreed process for a founder exit

The right mechanism depends on the size of the business and the relationship between the owners. The goal is not to predict every future disagreement, but to avoid paralysis.

8. Do the transfer and exit provisions fit the founders' goals?

Share transfer rules affect control of the company. Founders usually want limits on who can become a shareholder and a fair process if someone wants to sell.

Typical provisions include:

• pre-emptive rights on share transfers
• board approval requirements
• tag along rights for minority holders
• drag along rights for a company sale
• valuation processes for internal transfers

These clauses can have major consequences during a sale process. Before you sign, think about whether the agreement helps a future exit or makes it harder.

Common Shareholders’ Agreement Mistakes

Most shareholder agreement problems come from documents that are too generic for the business or too optimistic about how founders will behave under pressure. AI companies are especially exposed because the business value may sit in a few technical assets and a few key people.

Treating all founder contributions as equal forever

An even split can be sensible, but only if everyone understands what they are committing to. Problems arise when equal equity is issued upfront and no one deals with what happens if contributions diverge.

Here, founders often need vesting, milestone-based allocations, or at least a clear process if expected commitments are not met.

Leaving IP ownership to assumption

This is one of the most expensive mistakes. A founder may have used code from an old project, a contractor may have built part of the model pipeline without assigning rights, or the team may be using datasets under terms that do not permit the intended commercial use.

If the company cannot clearly show its right to use and commercialise the product, fundraising and enterprise sales become harder.

Using a foreign template without adapting it for New Zealand

Founders often pull a template from the internet or borrow a document from an overseas startup. The language may not line up with New Zealand company law, local business practice, or the company’s actual cap table and governance arrangements.

Even the heading in this article shows how easy it is for overseas wording to creep in. The agreement should match the New Zealand legal position, the company constitution and the practical reality of the business.

Ignoring data governance and confidentiality details

A standard shareholder agreement may mention confidentiality in one short clause. For an AI software business, that is rarely enough. Founders may have access to prompts, model tuning methods, customer data, testing results, source code, and commercially sensitive product roadmaps.

Before you rely on a verbal promise, make sure the agreement clearly says what information is protected, how it can be used, and what must happen on departure.

Failing to plan for investor entry

Some founders keep the first agreement very casual because no investor is involved yet. That can backfire. If an investor comes in, the company may need to unwind poor drafting, unclear share allocations, side promises, or inconsistent documents in a hurry.

A practical agreement should leave room for:

• future share issues
• new share classes
• investor consent rights
• updated board structures
• founder obligations continuing after investment

Overcomplicating the document

The opposite mistake also happens. Founders adopt a highly technical document full of investor-style provisions that do not fit the stage of the business. If the parties do not understand how the clauses work, the agreement will not help when tension arises.

The best agreement is clear enough that founders can actually use it in real situations, before you sign a major customer contract, before you hire aggressively, or before one founder steps back.

FAQs

Do AI startups in New Zealand actually need a shareholder agreement?

They are not legally required in every case, but they are strongly recommended where there is more than one founder or shareholder. Without one, key issues such as vesting, exits, IP ownership and transfer rights may be left unclear or handled poorly.

Is a constitution enough on its own?

Usually not. A constitution helps govern the company, but it often does not deal with the practical arrangements between founders in enough detail. A shareholder agreement usually sits alongside the company constitution.

Can a founder keep ownership of code they wrote before the company was formed?

Yes, unless that code has been properly assigned or licensed to the company. If pre-existing code is part of the product, ownership and usage rights should be documented clearly before investors or major customers start due diligence.

Should the agreement include restraints on founders?

Often yes, but they need to be reasonable and tailored to the real risk. Overly broad non-compete clauses may be difficult to enforce, so confidentiality, IP protection and focused non-solicit clauses are often just as important.

When should founders put the agreement in place?

As early as possible, ideally when equity is first being allocated and before you sign important contracts, spend heavily on development, or rely on assumptions about ownership and decision-making.

Key Takeaways

• A founder shareholder agreement for AI software company businesses should do more than split equity, it should cover governance, founder exits, IP ownership, confidentiality and future funding.
• For New Zealand AI companies, clear IP assignment is essential, especially for pre-company code, contractor work, datasets, model-related assets and confidential know-how.
• Vesting and good leaver or bad leaver rules can protect the business if a founder stops contributing or leaves early.
• Decision-making, reserved matters, transfer rights and deadlock processes should be agreed before relationships are tested.
• Generic or overseas templates often miss the practical and legal issues that matter most for a New Zealand AI software company.
• If you are reviewing or negotiating a founder shareholder agreement for an AI software company and want help with shareholder agreement terms, IP assignment, founder vesting, data confidentiality clauses, you can reach us on 0800 002 184 or team@sprintlaw.co.nz for a free, no-obligations chat.