Phaidra is a private AI company that builds autonomous control systems for industrial and data center operations. Its software optimizes power, cooling, and workload management to improve efficiency, reliability, and capacity utilization.
Access to pre-IPO shares is available to accredited investors through UpMarket.
Latest Price
$210M
Series B, Oct 2025, Perplexity
UpMarket Estimate
$246M
Based on UpMarket valuation model
Previous Price
Series A Mar 2024
How to Invest in Phaidra Through UpMarket
Phaidra shares are not on public exchanges. UpMarket provides accredited investors access through secondary market transactions.
Step 01
Verify accredited investor status
Confirm eligibility under SEC Rule 501 of Regulation D. Income or net worth threshold applies.
Step 02
Create an UpMarket account
Complete KYC/AML onboarding. Typically 1–2 business days. Licensed rep assigned on signup.
Step 03
Review available Phaidra offerings
Full offering memoranda and risk disclosures provided before any commitment is required.
Step 04
Complete subscription documents
Review and sign subscription agreement. All documents handled digitally through the platform.
Step 05
Fund your investment
Wire transfer or ACH. $50K minimum. Funds held in custodial account until close.
Pre-IPO investments are illiquid, speculative, and involve risk of total loss of capital.
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Valuation Growth Over Time
Post-money valuation by round
Previous roundsMost recent
Date
Round
PPS (split-adj.)
Valuation
Oct 2025
Series B
$210M
Mar 2024
Series A
2021
Seed
Why Investors Are Watching Phaidra
Growth Signal
Phaidra raised $50M Series B, lifting total funding to $120M
Phaidra closed a $50M Series B in October 2025 led by Collaborative Fund, with participation from Index Ventures, NVIDIA, Sony and others. Sacra says the round brought lifetime funding to about $120M, signaling continued investor support for its industrial AI platform.
Product Milestone
Phaidra sells AI control software for data-center energy optimization
The company operates a B2B SaaS model for energy-intensive industrial facilities, selling subscriptions to an AI control system without requiring customers to buy extra hardware. Its product is positioned as a “virtual plant operator” for industrial operations and data centers, aimed at improving energy efficiency and reliability.
Market Opportunity
Phaidra targets AI factories and mission-critical infrastructure
Phaidra says it wants to turn AI factories from cost centers into revenue-generating assets by maximizing every watt of performance. Startup Intros says the company serves operators of large-scale AI compute infrastructure and mission-critical facilities, optimizing power, cooling and workload orchestration.
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No. As of March 2026, Phaidra is a private company and does not trade on any public stock exchange. Accredited investors can access Phaidra shares through UpMarket, a FINRA-registered broker-dealer that specializes in pre-IPO investments.
Phaidra does not have a public stock price because it is privately held. The most recent known share price comes from its last funding round. Pre-IPO share prices on the secondary market may differ from the last round price depending on supply, demand, and market conditions.
Yes. Accredited investors can indicate interest in Phaidra shares through UpMarket by filling out the form on this page or creating an account at upmarket.co. All pre-IPO offerings are subject to availability and require a $50,000 minimum investment. UpMarket is a FINRA-registered broker-dealer and has brokered alternative investments since 2019.
Pre-IPO investments carry significant risks. Phaidra shares are illiquid, meaning there is no public market to sell them quickly. There is no guaranteed exit timeline or return. The investment is speculative in nature, and investors should be prepared for the possibility of total loss. Valuations of private companies can fluctuate substantially between funding rounds. Investors should consult their financial advisor and review all offering documents before investing.
In a pre-IPO transaction, accredited investors purchase shares from existing shareholders (such as employees, early investors, or other holders) through secondary market platforms. The company itself does not issue new shares in these transactions. UpMarket facilitates these trades as a FINRA-registered broker-dealer, handling compliance, documentation, and settlement on behalf of both parties.
There are two primary exit paths for pre-IPO holdings: selling your shares on the secondary market to another buyer, or holding until the company completes an IPO or is acquired. Both paths are subject to transfer restrictions, company approval (right of first refusal), and market conditions. The timing of any exit is unpredictable, and investors should plan for a multi-year holding period.
The minimum investment for most pre-IPO offerings on UpMarket is $50,000. This amount may vary depending on the specific offering and share availability. There are no fees to create an UpMarket account or browse available investments. Investors only pay transaction-related fees when they complete an investment.
UpMarket's valuation estimate of is derived from a proprietary model that incorporates multiple data sources: funding round data (Caplight), revenue estimates (Sacra), secondary market pricing, and public company comparables. The model applies a private company discount to the public comp multiple to account for illiquidity and information asymmetry. This estimate is not investment advice and may differ substantially from the price at which shares actually trade.
Phaidra builds autonomous AI control systems for industrial and data center operations, optimizing power, cooling, and workload management at a $246M valuation, after its $50M Series B lifted total funding to $120M — accredited investors can access Phaidra stock through UpMarket.