When a software company goes public, how its value gets calculated changes completely — from privately negotiated projections to a real-time verdict priced by public markets every second. A company privately valued at $12 billion can be repriced at $70 billion within a single day of trading, or a company that looked strong in private rounds can see its valuation cut by half within a year of listing. This guide covers how that shift actually works, what drives it, and why some IPOs hold their valuation while others don’t.
Key Takeaways
- Private valuation is negotiated between a company and its investors based on forward-looking growth assumptions; public valuation is set continuously by the market based on verified, disclosed financials.
- Going public adds a liquidity premium and access to a much larger pool of capital (index funds, pension funds, institutional investors), which is a major reason valuations can jump sharply at IPO.
- That same public pricing works in both directions — public markets also punish growth deceleration, margin compression, and weak customer retention far more quickly and severely than private investors typically do.
- Real examples show both outcomes: Snowflake and Zoom saw valuations multiply after going public, while Peloton and Deliveroo saw steep declines once public-market scrutiny set in.
How Private and Public Valuation Actually Differ
Before an IPO, a software company’s valuation is shaped by venture capital funding rounds, comparable private SaaS multiples, negotiated growth assumptions, and revenue run rate (ARR/MRR) — largely a negotiation between the company and a relatively small number of investors, who are pricing what the company could become.
After an IPO, that same company is priced continuously by public markets using standard, comparable metrics: P/E ratio, EV/Revenue multiple, free cash flow yield, and forward earnings growth. The company is no longer priced by a handful of venture investors — it’s priced by every institution, fund, and individual investor trading the stock in real time.
| Private Company | Public Company | |
| Valuation basis | Forward-looking projections | Verified, disclosed financials |
| Pricing method | Negotiated between company and investors | Continuous market trading |
| Liquidity | Illiquid — shares are hard to sell | Fully liquid on a listed exchange |
| Typical investor base | Venture capital, angel investors | Institutions, index funds, retail investors |
| Price discovery | Periodic, at each funding round | Real-time, every trading day |
Why Valuation Can Jump Sharply at IPO
- A liquidity premium. Public shares can be bought and sold instantly, and that liquidity itself supports a higher valuation multiple than an equivalent illiquid private stake.
- Access to a much larger capital pool. Once public, a company becomes eligible for investment from pension funds, mutual funds, ETFs, and other institutional capital that generally cannot invest in private companies — expanding demand for the stock.
- A market-legitimacy signal. Meeting exchange listing standards and SEC disclosure requirements is itself a signal of governance and financial maturity that can support investor confidence.
Real Examples: Valuation Expansion After IPO
Snowflake
Snowflake’s last private funding round in February 2020 valued the company at roughly $12.4 billion. Its September 2020 IPO priced at a $33.3 billion valuation — and by the end of its first day of public trading, the stock had more than doubled, putting its market cap at roughly $70 billion, making it the largest software IPO on record at the time.
Zoom Video Communications
Zoom’s 2019 IPO valued the company at roughly $9 billion. As remote work surged during the pandemic, Zoom’s market capitalization peaked at roughly $159 billion in October 2020 — an illustration of how quickly public market sentiment, not just underlying fundamentals, can re-rate a stock in either direction.
Real Examples: When Public Markets Punish a Company Instead
The same forces that can multiply a valuation at IPO can just as easily reverse it. Public markets price in future growth expectations, and when those expectations aren’t met, multiples compress quickly.
Peloton
Peloton priced its 2019 IPO at $29 a share. Pandemic-driven demand for at-home fitness pushed the stock to an all-time high around $167 in January 2021, valuing the company at roughly $50 billion. As growth slowed sharply once lockdowns ended and losses continued, the stock fell more than 95% from that peak, with the market cap down to roughly $1.8–3 billion by 2023–2024.
Deliveroo (UK)
Deliveroo’s April 2021 London IPO priced at the bottom of its range and still fell as much as 31% on its first day of trading — one of the worst large-IPO debuts in London’s history, wiping out roughly £2 billion in value immediately. The collapse wasn’t primarily about slowing growth; several major institutional investors had publicly declined to participate before the float, citing concerns over the company’s persistent losses, its treatment of delivery riders, and a share structure that kept founder control largely intact after listing.
What Public Markets Actually Punish
Across both outcomes above, a pattern holds: public investors are pricing predictability, not just growth. The factors that most often trigger sharp valuation drops after an IPO are:
- Growth deceleration. Public markets price expected future growth; when reported growth slows meaningfully, valuation multiples tend to compress well beyond what the slowdown alone would suggest.
- Margin compression. Falling gross margins or operating leverage concern institutional investors even when revenue is still growing.
- Weak retention. Public investors scrutinize customer churn and net revenue retention closely, since recurring-revenue durability is central to how SaaS companies are valued.
- Governance and structural concerns. As Deliveroo’s IPO showed, unresolved concerns about labor practices, profitability path, or founder control can suppress demand regardless of growth metrics.
A General Framework: Growth Rate and Revenue Multiples
As a general (not precisely quantifiable) pattern, faster-growing SaaS companies tend to command meaningfully higher EV/Revenue multiples than slower-growing ones, since public investors are paying largely for the growth trajectory rather than current revenue alone. This is a directional tendency across the sector, not a fixed formula — actual multiples for any specific company depend heavily on profitability, margin trends, and broader market conditions at the time.
A Long-Term Example: Salesforce
Salesforce’s 2004 IPO valued the company at roughly $110 million. As of mid-2026, its market capitalization is in the range of roughly $135–155 billion (fluctuating with normal trading), reflecting two decades of continuous growth in recurring enterprise revenue after going public. That said, this figure is well below the company’s peak market cap of well over $300 billion reached in earlier years — a reminder that even long-term public-market compounders see multiples expand and contract significantly over time as growth expectations shift.
Signs a Software Company Is Built for Public-Market Durability
These are commonly cited SaaS industry benchmarks, not universal thresholds — but companies that hold up well after an IPO tend to show most of the following:
- Consistent (not necessarily explosive) ARR growth
- Stable or expanding gross margins
- Net revenue retention above 100% (customers spending more over time, not just staying)
- Low customer churn
- A clear, credible path to free cash flow generation
Frequently Asked Questions
Why does valuation change so much at IPO?
Because pricing shifts from a negotiation between a company and a small group of private investors to continuous, real-time pricing by the entire public market — which adds a liquidity premium and access to a much larger pool of capital, but also far more scrutiny.
Does going public always increase a company’s valuation?
No. Deliveroo’s 2021 London IPO is a clear counterexample — it fell sharply on its first day of trading. Public markets can reprice a company downward just as quickly as upward.
What causes a post-IPO valuation collapse?
Most commonly: growth deceleration, margin compression, weak customer retention, or — as with Deliveroo — unresolved governance and business-model concerns that were already visible before the listing.
Is a high IPO valuation a guarantee of long-term success?
No. Peloton’s IPO and subsequent pandemic-era peak were followed by a decline of more than 95% from its high — a reminder that a strong IPO pop reflects market sentiment at that moment, not a guarantee of durable value.
Final Thoughts
Going public changes how a software company is valued — from a negotiated, forward-looking private estimate to a continuously priced public verdict. That verdict can be far more generous than private markets ever were, as Snowflake and Zoom show, or far harsher, as Peloton and Deliveroo show. The deciding factor isn’t the IPO itself — it’s whether the underlying business can keep delivering the growth, margins, and retention that public investors are pricing in.
For related context, see our guides on valuation metrics and how IPOs work.
