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>Synthesized raised a $20 million Series A in September 2025 led by Redalpine Venture Partners.</li><li>Synthesized operates a B2B SaaS model targeting enterprise development and QA teams in regulated industries.</li><li>The September 2025 Series A funding specifically targets go-to-market expansion in North America and continental Europe.</li></ul>

Synthesized raised a $20 million Series A in September 2025 led by Redalpine Venture Partners.Synthesized operates a B2B SaaS model targeting enterprise development and QA teams in regulated industries.The September 2025 Series A funding specifically targets go-to-market expansion in North America and continental Europe.

<ul><li>Rainforest's most recent funding round was a $25 million Series B in January 2018, led by Bessemer Venture Partners.</li><li>The platform's self-healing functionality uses AI agents to compare new UI versions with historical test runs.</li><li>Rainforest operates as a B2B SaaS platform with outcome-based pricing, replacing traditional seat-based licensing.</li></ul>

Rainforest's most recent funding round was a $25 million Series B in January 2018, led by Bessemer Venture Partners.The platform's self-healing functionality uses AI agents to compare new UI versions with historical test runs.Rainforest operates as a B2B SaaS platform with outcome-based pricing, replacing traditional seat-based licensing.

<ul><li>Antithesis raised $47 million in a seed round in February 2024 at a $215 million post-money valuation, led by Amplify Partners with participation from Tamarack Global, First In Ventures, and angel investors including Howard Lerman.</li><li>The workflow is simple: developers push new code, their CI/CD pipeline automatically sends container images to Antithesis via API, and within hours they receive detailed HTML reports showing any bugs discovered, complete with stack traces and replay instructions.</li><li>The launch of Multiverse Debugger in 2025 represents Antithesis's expansion beyond pure bug discovery into interactive developer tooling, adding timeline-based root cause analysis that integrates directly into engineering workflows.</li></ul>

Antithesis raised $47 million in a seed round in February 2024 at a $215 million post-money valuation, led by Amplify Partners with participation from Tamarack Global, First In Ventures, and angel investors including Howard Lerman.The workflow is simple: developers push new code, their CI/CD pipeline automatically sends container images to Antithesis via API, and within hours they receive detailed HTML reports showing any bugs discovered, complete with stack traces and replay instructions.The launch of Multiverse Debugger in 2025 represents Antithesis's expansion beyond pure bug discovery into interactive developer tooling, adding timeline-based root cause analysis that integrates directly into engineering workflows.

<ul><li>Momentic raised $3.7 million in a seed round in March 2025, led by FundersClub with participation from General Catalyst, Y Combinator, AI Grant, Karman Ventures, and notable angels including Aaron Levie and Kulveer Taggar.</li><li>The core breakthrough is the self-healing capability.</li><li>The platform's self-healing capabilities create a compelling value proposition around reduced maintenance overhead.</li></ul>

Momentic raised $3.7 million in a seed round in March 2025, led by FundersClub with participation from General Catalyst, Y Combinator, AI Grant, Karman Ventures, and notable angels including Aaron Levie and Kulveer Taggar.The core breakthrough is the self-healing capability.The platform's self-healing capabilities create a compelling value proposition around reduced maintenance overhead.

<ul><li>Vibe coding is accelerating the output of both code and bugs, creating the need to get test coverage across new features faster and driving the rise of developer-native “vibe testing” tools like Momentic, Antithesis ($77M raised, Amplify Partners), QA Wolf ($56M raised, Inspired Capital) and Qodo ($50M raised, Susa Ventures) that translate natural language into code and bundle in test generation, auto-repair when the UI changes, and observability.</li><li>As writing end-to-end tests becomes faster and easier, it’s moving out of QA teams and into the entire engineering organization, turning testing from post-hoc validation to always-on developer infrastructure and creating the opportunity to merge together once-separate categories like CI test checks (GitLab), browser automation (BrowserStack), observability (Datadog) and QA outsourcing (Applause) into one unified platform for validating that software actually works.</li><li>One of our customers saw a 5x speed improvement in time to automate moving from Playwright to Momentic. We were able to see some very drastic reliability improvements moving from Cypress to Momentic as well.</li></ul>

Vibe coding is accelerating the output of both code and bugs, creating the need to get test coverage across new features faster and driving the rise of developer-native “vibe testing” tools like Momentic, Antithesis ($77M raised, Amplify Partners), QA Wolf ($56M raised, Inspired Capital) and Qodo ($50M raised, Susa Ventures) that translate natural language into code and bundle in test generation, auto-repair when the UI changes, and observability.As writing end-to-end tests becomes faster and easier, it’s moving out of QA teams and into the entire engineering organization, turning testing from post-hoc validation to always-on developer infrastructure and creating the opportunity to merge together once-separate categories like CI test checks (GitLab), browser automation (BrowserStack), observability (Datadog) and QA outsourcing (Applause) into one unified platform for validating that software actually works.One of our customers saw a 5x speed improvement in time to automate moving from Playwright to Momentic. We were able to see some very drastic reliability improvements moving from Cypress to Momentic as well.

Wei-Wei Wu, CEO Of Momentic, On AI-native end-to-end Testing

United States

AI-native service providing 80% automated end-to-end test coverage for web and mobile applications in weeks not years

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QA Wolf (WOLF US)

Primer: Synthesized - 25 Sep 2025

Enterprise test data infrastructure platform using AI-powered synthetic data generation and autonomous test data agents to streamline software...

Sacra

Primer: Rainforest - 11 Sep 2025

AI-accelerated platform for teams to automate and maintain end-to-end tests for web and mobile applications

Sacra

Primer: Antithesis - 04 Jun 2025

Continuous reliability platform that autonomously searches for, reproduces, and tests software bugs in a simulated environment without impacting...

Sacra

Primer: Momentic - 04 Jun 2025

AI-powered platform enabling developers to create and maintain end-to-end software tests efficiently

Sacra

Wei-Wei Wu, CEO Of Momentic, On AI-native end-to-end Testing

In short, what is Momentic...

Sacra

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