Private Markets, Angel and Secondary Investing, Sacra

Sacra

Private Markets, Angel and Secondary Investing

Bringing transparency to private markets so investors, founders, and employees can build on conviction. Sacra delivers deeply researched insights on the private companies shaping tomorrow's markets. By surfacing the data, context, and operator perspective that are missing from private markets today, we help secondary buyers and sellers price equity accurately and unlock liquidity for the people building these businesses.

Private Capital Markets

<ul><li>GPTZero reached $16M in ARR by April 2025, up from $6.8M at the end of 2024.</li><li>The November 2022 launch of ChatGPT enabled students to generate whole essays with a prompt, sparking a panic in education and inspiring the launch of GPTZero (founded in 2023), an AI detection web app that uses a fine-tuned language model to measure how closely each sentence in a text matches the statistical, next-token patterns learned from millions of LLM outputs.</li><li>Like Norton Antivirus riding the 1990’s rise of PC malware, GPTZero is riding the explosion of adversarial ChatGPT copy & paste—and not unlike how Windows bundled antivirus in the OS, GPTZero’s next phase of competition will come from the threat of bundling via 1) incumbents like Turnitin in GPTZero’s core vertical of education, and 2) watermarking in the underlying LLMs by OpenAI and Gemini or new models without signatures at all.</li></ul>

GPTZero reached $16M in ARR by April 2025, up from $6.8M at the end of 2024.The November 2022 launch of ChatGPT enabled students to generate whole essays with a prompt, sparking a panic in education and inspiring the launch of GPTZero (founded in 2023), an AI detection web app that uses a fine-tuned language model to measure how closely each sentence in a text matches the statistical, next-token patterns learned from millions of LLM outputs.Like Norton Antivirus riding the 1990’s rise of PC malware, GPTZero is riding the explosion of adversarial ChatGPT copy & paste—and not unlike how Windows bundled antivirus in the OS, GPTZero’s next phase of competition will come from the threat of bundling via 1) incumbents like Turnitin in GPTZero’s core vertical of education, and 2) watermarking in the underlying LLMs by OpenAI and Gemini or new models without signatures at all.

<ul><li>Three form factors for AI agents are emerging—browser-based &amp; mobile apps (ChatGPT, Claude, Perplexity) with easy distribution and app-level integrations, native apps with OS-level integrations & OS forks (Perplexity Assistant, Granola, Wafer) that unlock deeper awareness across a user’s apps and data but face distribution challenges, and purpose-built AI hardware devices (Friend, Rabbit) with novel interaction patterns.</li><li>OpenAI’s hardware projects and Perplexity’s new Android assistant are attacking the OS-level AI assistant layer where Google and Apple’s app store–based business models—built on developers giving up a 30% cut in exchange for distribution—make it structurally difficult for Google and Apple themselves to route users around apps entirely.</li><li>Android’s open ecosystem structure represents a huge opportunity for AI-first computing, with custom assistants (Perplexity), launchers (Microsoft Launcher), and full-on forks (Wafer, /dev/agents) potentially providing Samsung and the 96% of non-Google Android OEMs with the firepower to build the first AI-native smartphone experience.</li></ul>

Three form factors for AI agents are emerging—browser-based &amp; mobile apps (ChatGPT, Claude, Perplexity) with easy distribution and app-level integrations, native apps with OS-level integrations & OS forks (Perplexity Assistant, Granola, Wafer) that unlock deeper awareness across a user’s apps and data but face distribution challenges, and purpose-built AI hardware devices (Friend, Rabbit) with novel interaction patterns.OpenAI’s hardware projects and Perplexity’s new Android assistant are attacking the OS-level AI assistant layer where Google and Apple’s app store–based business models—built on developers giving up a 30% cut in exchange for distribution—make it structurally difficult for Google and Apple themselves to route users around apps entirely.Android’s open ecosystem structure represents a huge opportunity for AI-first computing, with custom assistants (Perplexity), launchers (Microsoft Launcher), and full-on forks (Wafer, /dev/agents) potentially providing Samsung and the 96% of non-Google Android OEMs with the firepower to build the first AI-native smartphone experience.

Sam Hall, CEO Of Wafer, On AI Agent Form Factors

<ul><li>Sacra estimates that Fluidstack hit $180M in annual recurring revenue (ARR) at the end of 2024, up 620% YoY.</li><li>Founded in 2017 as an "Airbnb for bandwidth", Fluidstack offered people $50/month to turn their home computers into content delivery networks (CDNs) for companies like Dailymotion—pivoting in 2021 to rent ML companies underutilized GPUs from data centers.</li><li>Fluidstack with Lambda ($425M ARR) and Together AI ($130M ARR) make up the startup/SMB end of the GPU cloud market—renting GPUs themselves or colocating—with a focus on speed and developer experience.</li></ul>

Sacra estimates that Fluidstack hit $180M in annual recurring revenue (ARR) at the end of 2024, up 620% YoY.Founded in 2017 as an "Airbnb for bandwidth", Fluidstack offered people $50/month to turn their home computers into content delivery networks (CDNs) for companies like Dailymotion—pivoting in 2021 to rent ML companies underutilized GPUs from data centers.Fluidstack with Lambda ($425M ARR) and Together AI ($130M ARR) make up the startup/SMB end of the GPU cloud market—renting GPUs themselves or colocating—with a focus on speed and developer experience.

<ul><li>CoreWeave is expecting to end 2024 with $2B in revenue, up 330% YoY.</li><li>The total value of CoreWeave's booked contracts has surged to $17B, with $10B of that from a new deal to sell compute.</li><li>CoreWeave has gone from a 1.8x lead over Lambda Labs to a 4.3x lead as scale begets scale.</li></ul>

CoreWeave is expecting to end 2024 with $2B in revenue, up 330% YoY.The total value of CoreWeave's booked contracts has surged to $17B, with $10B of that from a new deal to sell compute.CoreWeave has gone from a 1.8x lead over Lambda Labs to a 4.3x lead as scale begets scale.

<ul><li>Sacra estimates that HeyGen hit $22M in annualized recurring revenue (ARR) in May, up 1024% year-over-year.</li><li>Synthesia and HeyGen’s early pivots into enterprise have allowed them to largely avoid the AI prosumer trap that slowed the growth of Jasper and Copy.ai, with 70% of Synthesia’s revenue coming from enterprise deals.</li><li>While HeyGen and Synthesia build end-user SaaS, Tavus is building APIs and developer tooling around their own custom models to make AI talking heads a native feature of every SaaS product.</li></ul>

Sacra estimates that HeyGen hit $22M in annualized recurring revenue (ARR) in May, up 1024% year-over-year.Synthesia and HeyGen’s early pivots into enterprise have allowed them to largely avoid the AI prosumer trap that slowed the growth of Jasper and Copy.ai, with 70% of Synthesia’s revenue coming from enterprise deals.While HeyGen and Synthesia build end-user SaaS, Tavus is building APIs and developer tooling around their own custom models to make AI talking heads a native feature of every SaaS product.

United States

Workflow automation platform for go-to-market teams using AI to generate personalized outreach

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Copy.ai (AI US)

$16M/year Norton AntiVirus For AI Text

TL;DR: With the launch of ChatGPT triggering a panic over AI-generated essays in education, GPTZero launched as an AI detection platform that...

Sacra

Sam Hall, CEO Of Wafer, On AI Agent Form Factors

We’ve written about Granola, the desktop app that uses system audio to launch & record meetings and Rewind (now Limitless), the desktop app that...

Sacra

Fluidstack At $180M ARR

TL;DR: Sacra estimates that Fluidstack hit $180M in annual recurring revenue (ARR) at the end of 2024, up 620% YoY. While GPU clouds like CoreWeave...

Sacra

CoreWeave At $2B Revenue

TL;DR: Sacra estimates that CoreWeave will generate $2B in revenue in 2024, up 330% YoY, powered by a new $10B contract with Microsoft. With a...

Sacra

AI Talking Heads Growing 1024%

TL;DR: Sacra estimates that HeyGen hit $22M in annualized recurring revenue (ARR) in May, up 1024% year-over-year, as AI-generated talking head...

Sacra

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