The best cash flow forecasting software for startups depends on one question most buying guides skip: where do the forecast's actuals come from? Tools like Float, Fathom, and Jirav project forward from your accounting file, while Futureproof pairs forecasting with live books. This guide compares the leading options for pre-seed through Series A companies.
We looked at the tools that dominate this category, checked what each one publicly charges, and tested every option against the situation most startups are actually in: no FP&A hire, a founder who owns the numbers, and a runway question that cannot wait for month-end. The comparison table and stage-by-stage recommendation are below.
Why generic software lists point startups in the wrong direction
Search for cash flow forecasting software and the top results are written for someone else. The highest-ranking roundups feature HighRadius, Kyriba, Anaplan, and SAP, platforms built for enterprise treasury teams managing multi-entity, multi-currency cash positions. Even the SMB-focused lists rank tools by feature count: number of integrations, scenario limits, report templates.
Feature count is the wrong axis for a startup. A pre-seed or seed-stage company has no treasury team and usually no dedicated finance hire. The person building the forecast is the founder or a generalist ops lead, and their constraints are time and data quality, not a missing consolidation module.
There is a second problem with the standard lists: almost none of the tools they recommend publish prices. In our review of the three top-ranking roundups, covering more than 30 named products, not one listed a single dollar figure. For a founder managing burn rate week to week, "book a demo to find out what this costs" is a real cost in itself.
The split that matters: where your actuals come from
Every cash flow forecast starts from the same raw material: what you actually collected and spent, projected forward. That means the forecast is only as current as the actuals underneath it. This is the split that separates the market, and it matters far more than any feature checklist.
Most forecasting tools sit on top of your accounting file. They sync from QuickBooks or Xero, pull in open invoices and bills, and build a projection from whatever the ledger says. The modeling can be excellent, but if your books close three weeks after month-end, the forecast starts three weeks stale. A projection built in late April on February's reconciled numbers is a guess wearing a chart.
The alternative is a system where the books themselves stay current, so the forecast reads from transactions as they happen rather than from the last close. Fewer tools work this way because it requires owning bookkeeping, not just syncing from it. This distinction runs through our full guide to runway, burn rate, and cash flow clarity, and it should be the first filter you apply when evaluating any cash flow forecast tool.
What startups should look for
Before the comparison, here is the short list of criteria that matter at pre-seed through Series A. Each one traces back to a decision you will actually face, not a feature you might someday want.
- Fresh actuals. Ask where the tool gets its numbers and how old they are on a typical Tuesday. A forecast that updates from live transactions beats a prettier one that updates at close.
- Scenario planning you will actually use. You need a base case, a downside case, and the ability to model one decision, like a hire or a price change, without rebuilding the model.
- A weekly cash view. Monthly forecasts hide payroll timing and annual-contract lumpiness. A 13-week view catches the gap between cash in the bank and cash you can spend.
- Runway math built in. The output that matters is months of cash runway under each scenario, calculated on net burn rather than gross burn.
- A price you can see. If a vendor will not publish pricing, assume the number assumes a finance team.
Best cash flow forecasting software compared
The table below covers the tools startups will actually shortlist, plus the spreadsheet many are already running. Pricing is as publicly listed in mid-2026; where a vendor publishes no numbers, we say so rather than guessing.
| Tool | Built for | Forecasting approach | Indicative pricing | Best fit |
|---|---|---|---|---|
| Spreadsheet (Excel or Sheets) | Anyone | Manual formulas, manually entered actuals | Free templates; the real cost is founder hours | Pre-seed with simple cash movements |
| Float | Small businesses on Xero, QuickBooks Online, or FreeAgent | Visual cash forecast built from synced invoices and bills | £79 to £235 per month (mid-2026, GBP) | Small businesses wanting a visual layer on the ledger |
| Fathom | Accountants and advisors reporting across client companies | Three-way forecasting (cash, P&L, balance sheet) from ledger syncs | From A$65 per month for one company (mid-2026, AUD) | Advisor-run forecasting and reporting |
| Jirav | Accounting and CFO advisory firms, SMBs | Driver-based budgets and forecasts on ledger data | Advertised from $50 per month; fuller plans quote-based (mid-2026) | Firms delivering FP&A to many clients |
| Runway | Scaling teams with a first finance hire | Driver-based FP&A models with scenario planning | Custom, quote-based | Series A and later, with an owner for the model |
| Mosaic (now part of HiBob) | Mid-market strategic finance teams | Strategic finance platform with cash forecasting inside | Custom, quote-based | Later-stage companies with dedicated FP&A |
| Futureproof | Pre-seed to Series A startups | Margo forecasts on live books kept by Vic; part of a six-agent AI finance team | $1,000 per month flat, all six agents | Startups that want the forecast and the books that feed it, without a finance hire |
A few notes on the table. Float and Fathom price in GBP and AUD respectively because that is how their public pricing pages list them; both serve US customers. Jirav's advertised entry price is aimed at accounting firms, and most direct plans require a quote. Mosaic was acquired by HiBob, and its pricing page now redirects there, so treat any older published numbers as stale.
Float
Float is the classic visual forecasting layer. It syncs invoices and bills from Xero, QuickBooks Online, or FreeAgent and turns them into a rolling cash projection with scenarios. It is honest, focused software; its limits are inherited from the ledger it reads, so a slow close makes Float's picture slow too.
Fathom
Fathom does three-way forecasting, meaning cash flow, profit and loss, and balance sheet stay linked, which accountants rightly love. Its pricing scales by number of companies, which tells you the design center: advisors managing a portfolio of clients. A single startup can use it, but you are buying a reporting suite built for someone who reports on you.
Jirav
Jirav offers driver-based planning, so your forecast responds to inputs like headcount and pipeline rather than just extrapolating history. Like Fathom, its go-to-market leans on accounting and fractional CFO firms. If you already work with a firm that runs Jirav, that can be a fine path; buying it solo means learning FP&A tooling on your own time.
Runway and Mosaic
Runway and Mosaic are genuine FP&A platforms, and good ones. Both assume someone owns the model: a first finance hire at minimum, more often a dedicated FP&A person. Neither publishes pricing, and both say plainly that cost depends on your systems and complexity. They belong on your list at Series A and beyond, not before.
The spreadsheet
A spreadsheet is not a wrong answer at pre-seed. If your company has one bank account, a handful of vendors, and no revenue complexity, a 13-week template updated weekly will serve you well. The failure mode is drift: the week you skip updating it is always the week something changes, and manually keyed actuals rot faster than anyone expects.
Where Futureproof fits, honestly
Futureproof is not a standalone forecasting tool, and if a standalone forecasting layer is all you want, one of the tools above may fit better. Futureproof is an AI finance team for startups from pre-seed through Series A: six agents covering bookkeeping, receivables, payables, forecasting, revenue operations, and investor reporting, for $1,000 per month flat.
The forecasting agent, Margo, builds runway and cash flow projections with scenario planning. What makes her different from a sync-based tool is upstream: Vic, the bookkeeping agent, keeps the books current continuously, so Margo's forecast reads from live actuals instead of the last close. The stale-ledger problem that limits every import-based cash flow forecast tool is the specific thing this architecture removes.
The honest tradeoff is that you are adopting a finance team, not adding one app to an existing stack. For a startup that already has clean, fast books and just wants projection software, that is more change than necessary. For a startup where the founder is doing books late at night and the forecast lives in a spreadsheet with February's numbers, it replaces both problems at once. You can see the runway math the way Margo frames it in our free startup runway calculator.
How to choose by stage
At pre-seed, keep it simple. A weekly spreadsheet forecast plus a monthly runway check is enough while your transaction volume is low, and moving to software too early adds process without adding signal. The discipline of updating it weekly matters more than the tool.
At seed, the calculus changes because your time does. Transaction volume grows, investors start asking for budget-versus-actuals style clarity, and the spreadsheet starts eating hours you owe to product and customers. This is where either a sync-based tool on top of well-kept books, or a live-books system like Futureproof, earns its cost. Our burn rate benchmarks by stage are a useful companion when you calibrate the forecast you build.
At Series A, you will likely add a real FP&A layer like Runway, or a finance hire who brings their own tooling. The forecast also stops being purely defensive; it becomes the plan you commit to a board. Whatever you choose, the practices in our guide to runway management apply at every stage, and if cash is already tight, start with the 90-day cash crunch playbook before you evaluate any software.
One scope note: this guide is written for SaaS startups. Ecommerce operators have inventory timing and marketplace payout cycles that change the mechanics, and we cover that separately in our 13-week cash flow forecast guide for ecommerce.
FAQ
What is cash flow forecasting software?
Cash flow forecasting software projects your future cash position from your actual inflows and outflows, usually by syncing with your accounting system or bank feeds. Good tools add scenario planning, so you can model decisions like a hire or a pricing change, and express the output as months of runway rather than just a chart.
Is a spreadsheet good enough for a startup cash flow forecast?
At pre-seed, usually yes. A 13-week template updated every week beats sophisticated software that nobody maintains. Spreadsheets break down when transaction volume grows, when actuals get keyed in late or wrong, and when you need scenarios that do not require rebuilding formulas.
How much does cash flow forecasting software cost?
Published pricing in mid-2026 runs from roughly $50 to a few hundred dollars per month for SMB tools like Float, Fathom, and Jirav. FP&A platforms such as Runway and Mosaic are quote-based and priced for teams with a finance hire. Futureproof is $1,000 per month flat, which includes forecasting along with bookkeeping, AR, AP, revenue operations, and investor reporting.
What is the difference between cash flow forecasting software and FP&A software?
Cash flow forecasting tools answer one question: when does cash arrive, when does it leave, and how long does it last. FP&A platforms model the whole business, including headcount plans, revenue drivers, and board reporting, and assume a finance owner. Startups usually need the first well before they need the second.
How often should a startup update its cash flow forecast?
Weekly. Monthly updates hide payroll timing, annual contract renewals, and slow-paying customers until the damage is done. This is the strongest argument for tools built on live books: the forecast refreshes as transactions happen instead of waiting for someone to find the time.
Ready to see a forecast that runs on books that are never behind? Start with Futureproof and get Margo's forecasting, Vic's bookkeeping, and the rest of the six-agent finance team for $1,000 per month flat.
