Private Markets, Angel and Secondary Investing, Sacra

Sacra

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 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>As the cost and latency of the AI voice stack collapsed in 2023, with GPT-4 Turbo getting 10x cheaper, Deepgram’s Nova-2 speech-to-text falling under 300ms, and Cartesia’s Sonic text-to-speech under 90ms, Retell AI (YC W24) shifted from live-streamed dubbing for international creators into a developer platform that makes it easy for developers to stitch together any LLM, TTS, & STT to build low-latency AI phone agents.</li><li>After finding product-market fit with BPOs (Everise) and services businesses with high-volume, high-stakes support needs in finance (Sunshine Loans) and insurance (Matic), Sacra estimates Retell hit $45M in annualized revenue in 2025, up 733% year-over-year.</li><li>As ElevenLabs ($500M ARR, up 175% YoY), Cartesia ($191M raised, Index Ventures), and Deepgram ($86M raised, Wing VC) expand from speech APIs into agents & Sierra ($150M ARR, up 400% YoY) and Decagon ($35M ARR, up 1,567% YoY) look to own voice end-to-end for enterprises, Retell is betting on being the model-agnostic, developer-centric control layer that lets companies stitch together any LLMs & speech models to ship highly customized voice agents with guardrails and monitoring tools.</li></ul>

As the cost and latency of the AI voice stack collapsed in 2023, with GPT-4 Turbo getting 10x cheaper, Deepgram’s Nova-2 speech-to-text falling under 300ms, and Cartesia’s Sonic text-to-speech under 90ms, Retell AI (YC W24) shifted from live-streamed dubbing for international creators into a developer platform that makes it easy for developers to stitch together any LLM, TTS, & STT to build low-latency AI phone agents.After finding product-market fit with BPOs (Everise) and services businesses with high-volume, high-stakes support needs in finance (Sunshine Loans) and insurance (Matic), Sacra estimates Retell hit $45M in annualized revenue in 2025, up 733% year-over-year.As ElevenLabs ($500M ARR, up 175% YoY), Cartesia ($191M raised, Index Ventures), and Deepgram ($86M raised, Wing VC) expand from speech APIs into agents & Sierra ($150M ARR, up 400% YoY) and Decagon ($35M ARR, up 1,567% YoY) look to own voice end-to-end for enterprises, Retell is betting on being the model-agnostic, developer-centric control layer that lets companies stitch together any LLMs & speech models to ship highly customized voice agents with guardrails and monitoring tools.

Retell AI, 연간 4,500만 달러 규모로 전년 대비 733% 성장