A quantitative case for how outsiders to traditional VC have contributed to a bubble in private technology valuations
Mark Suster / Bothsides of the Table :
Context & Ripple Effects
Suster's post lands months after Andreessen Horowitz made its case against tech bubble talk, making 2015 the moment the industry's own investors split publicly on whether private marks reflected reality. His contribution is the quantitative framing: the buyers newly active in late-stage private technology — the outsiders to traditional VC — are the marginal price-setters pushing valuations beyond fundamentals.
The subsequent record bears out the thesis's shape: by 2019 VCs had raised $55B, matching 1999 levels, with most of the increase flowing into growth rounds that operate as private IPOs, while worldwide early-stage rounds fell from roughly 13.3K in 2014 to about 5.9K — capital pooling upward precisely where the outsider money sits.
First-order effects
- Non-traditional investors bidding at growth stages inflate the marks on late-stage portfolios directly, leaving traditional firms to either match outsider pricing or concede the best companies at Series C and beyond.
- Founders get a functioning alternative to listing: growth capital from outside balance sheets lets companies stay private longer at rising valuations, which is exactly what the 2018 fundraising peak mirrored from 1999.
Second-order effects
- Capital concentrating in large growth rounds starves the top of the funnel — the early-stage collapse that hit mobile-app and SaaS startups hardest is the visible cost of money crowding into fewer, bigger checks.
- Traditional firms respond by raising ever-larger funds to compete at later stages, extending the same dynamics that produced the 2018 total and, eventually, the 'absurd valuation' landscape covered in 2021.
Third-order effects
- If outside capital keeps setting private prices above what exit markets will bear, the gap between valuation and liquidity widens until forced repricing sorts winners from losers — the pattern behind both the 2021 warnings about overpaying and the selective blockbusters like Sutter Hill's Snowflake and Accel's UiPath bet.
- Structurally, private markets become shadow public markets: without daily mark-to-market discipline, mispricing accumulates longer before it surfaces, shifting risk onto limited partners rather than retail shareholders.
The trend: Venture capital is bifurcating into outsized, outsider-funded growth rounds atop a thinning early-stage pipeline, with private valuations increasingly set by non-VC balance sheets.