Start with the shape, because it changes more between rounds than most founders expect.
| Seed | Series A | Series B | |
|---|---|---|---|
| Typical file count | 30 to 80 | 100 to 400 | 300 to 1,000 or more |
| Top-level folders | 4 or 5 | 8 or 9 | 10 to 12 |
| Financials | Bank statements, simple model | Monthly management accounts, reviewed or audited annual accounts, driver-based model | Audited accounts, budget versus actuals, cohort and unit economics |
| Metrics focus | Early traction, pipeline | Revenue quality, retention, growth efficiency | Repeatability by segment, payback, margin path |
| Legal depth | Incorporation, SAFEs, founder agreements | Full corporate, IP chain, top customer contracts | Plus compliance, security, data protection, litigation |
| Who reviews | Angel or seed partner | Lead partner, associate, investor counsel | Several partners, counsel, sometimes accountants and security reviewers |
The jump from seed to Series A is the biggest one. A seed investor is betting on the team and the idea. A Series A lead is buying into evidence, and the data room is where that evidence lives.
What is a Series A data room?
A Series A data room is the secure online folder set a startup shares with prospective lead and co-investors during its first priced institutional round, holding the corporate, financial, commercial, people and IP records they need to confirm the pitch and close the round.
It is smaller and calmer than an M&A room. There are no competing bidders, rarely a formal Q&A process, and usually a single lead investor driving the timetable. But the lead’s counsel will still read every document behind the cap table, and the associate will still rebuild your revenue from the raw exports.
Which folders does a Series A data room need?
Nine folders cover almost every Series A. Number them, keep them in this order, and leave empty folders out rather than labelling them “to come”.
- Overview (folder 1): the deck, a one-page company summary, and the index of the room.
- Corporate (folder 2): certificate of incorporation and amendments, bylaws, board and stockholder consents, and the list of directors.
- Capitalisation (folder 3): the cap table, every stock purchase agreement, option plan and grants, every SAFE and convertible note, and any warrants.
- Financials (folder 4): monthly management accounts for at least 24 months, annual accounts, the operating model, and the bank and debt documents.
- Metrics (folder 5): the source data behind the deck, such as ARR or revenue by month, customer counts, cohort retention and pipeline.
- Commercial (folder 6): top customer contracts, standard terms, key supplier and partner agreements, and pricing.
- People (folder 7): organisation chart, employment and contractor agreements, offer letter templates, and key employee terms.
- Intellectual property (folder 8): invention assignment agreements from every founder, employee and contractor who wrote code or designs, plus any patents, trademarks and open source licence review.
- Legal and compliance (folder 9): litigation or threatened claims, privacy policy and data processing terms, regulatory licences, and insurance.
If you have already built a numbered index for a previous round, reuse it. The index template gives you a numbering pattern that scales from this room to a sale.
What do Series A investors actually look at first?
Not the legal folders. Those come later, mostly through counsel.
The first visit is almost always to Metrics and Financials. The associate wants to see whether the revenue line in the deck reconciles to the monthly accounts, whether the customer count matches the CRM export, and whether retention looks the same when calculated from raw data instead of your summary slide.
Then, as a term sheet comes into view, the Capitalisation folder. A lead investor needs to know exactly what it is buying: how many shares exist on a fully diluted basis, what the SAFEs and notes convert into at the new price, and how big the option pool needs to be after the round.
Only after a term sheet is signed does investor counsel work through Corporate, People, IP and Legal in detail. That is why the room can open in two stages.
How should you stage access to a Series A room?
Two stages work for most rounds.
Before the partner meeting, open Overview, Metrics and a summary of Financials. Keep it to perhaps 20 to 40 files. You want the associate to test your numbers, not wade through bylaws.
After a term sheet, open the full room to the lead investor and its counsel. Co-investors usually get the same access once they are confirmed. Keep customer contracts and individual salary data view-only even at this stage, and keep dynamic watermarks on.
If several funds are looking at the same time, give each its own permission group. Investors do not compete like M&A bidders, but they do talk to each other, and you want to know which fund actually opened the cohort file. Engagement reports tell you that, which is useful when deciding who to chase.
Which Series A folders open when, and who reads them first
What does the metrics folder need to prove?
This is the folder that most often decides the round, so it deserves the most care. Here is what each metric typically needs behind it.
| Metric | Source document investors want | Common problem |
|---|---|---|
| ARR or monthly revenue | Monthly revenue by customer, exported from billing | Deck uses bookings, accounts use recognised revenue |
| Customer count | CRM or billing export with start and end dates | Pilots and free trial users counted as customers |
| Net revenue retention | Cohort table by starting month | Calculated on a flattering cohort only |
| Gross margin | Cost of revenue breakdown from the accounts | Hosting and support costs left in operating expenses |
| Burn and runway | Monthly cash flow and bank balances | Model and bank statements do not reconcile |
| Pipeline | CRM report with stage, value and age | Stale opportunities never closed out |
The fix is the same in every row: put the raw export next to the summary, and make sure the definitions in a short metrics note match what the deck says. An investor who finds one reconciliation gap will check everything else twice.
Which gaps slow down a Series A close?
The same few problems delay rounds again and again. None is fatal, but each costs days of lawyer time after the term sheet.
Missing IP assignments. A founder or early contractor who never signed an invention assignment is the classic Series A finding. Investor counsel will want every person who wrote code, including the friend who built the first prototype. Fix it before the round, not during.
A cap table that does not reconcile. The spreadsheet says one thing; the signed stock purchase agreements, board consents and option grants say another. Reconcile every line to a signed document.
Undocumented SAFEs and notes. Every instrument needs its signed copy in the room, with its cap, discount and any side letters. Conversion maths at the new price is one of the first things the lead’s counsel models.
Missing 83(b) elections. For founders with vesting stock in the US, investors usually ask for copies of the elections filed with the IRS within 30 days of the stock grant, under the rules in 26 CFR 1.83-2. A missed election is costly and cannot be fixed later, so counsel will want proof.
Board approvals that were never papered. Option grants issued on an email “yes” need ratifying consents.
A Series A room is not judged by how much is in it. It is judged by whether every number and every share traces back to a signed document.
What does the room not need yet?
Founders sometimes overbuild, and that has a cost too: it slows the investor down and invites questions about things that do not matter at this stage.
You usually do not need a full tax folder beyond filed returns, detailed IT security policies beyond a short summary, real estate documents beyond the office lease, or a full HR policy library. Those arrive at Series B or in a sale. Our due diligence checklist shows what a full sale-ready room looks like, which is a useful picture of where you are heading but not where you need to be.
Which securities filings belong in the room?
Most US priced rounds rely on the private placement exemption in Rule 506 of Regulation D, and companies file a Form D notice afterwards. Investors’ counsel will want to see that earlier rounds were handled the same way, so include copies of any prior Form D filings and state notice filings in the Corporate or Capitalisation folder. If you raised on SAFEs without filing, say so and let counsel advise; it is a common gap, and better found by you than by them.
Picking a room for the round? See which providers we rank for fundraising, with their pricing and the features investors use.
See fundraising picksWhich data room features matter for a Series A?
Fewer than for a sale, but not none. You need permission groups per fund, view-only and watermarking for sensitive files, an audit trail and engagement reports, and a simple way for counsel to download the legal folders. A Q&A module is useful if more than one fund is in diligence at once, though many founders still answer questions on calls.
Price matters too, because a round can run three or four months. A flat monthly plan avoids the per-page and per-user meters that make investor rooms expensive; our cost guide works through a Series A budget in detail. And because the same room often grows into a Series B or a sale room later, it is worth choosing one with the full diligence toolkit from the start rather than migrating mid-way. The quiz matches providers to your round size and timeline.
Frequently asked questions
How many documents should a Series A data room have?
Typically 100 to 400 files across eight or nine folders. Quality and reconciliation matter far more than volume.
When should a startup open its Series A data room?
Have it ready before the first partner meetings. Open a small first-look set early, then the full room to the lead investor and its counsel after the term sheet.
Do I need a data room for a seed round?
Not always. A shared folder with a few dozen documents is often enough for seed, though a proper room helps once several funds are reviewing at the same time.
What is the most common Series A diligence problem?
Missing invention assignment agreements, closely followed by a cap table that does not reconcile to the signed share and option documents.
Should investors be able to download files from a Series A data room?
Usually yes for corporate and legal documents their counsel needs, but keep customer contracts, salary data and the detailed model view-only with watermarks.
