Vienna-Based Proofcheck Secures €500k Pre-Seed Investment for AI-Powered Content Quality Assurance


  • Vienna-based Proofcheck has raised €500k in a pre-seed funding round led by the German-Swiss 5502 Fund.
  • The funding will accelerate the development of their AI-powered platform, expanding its functionality across corporate content creation.
  • Proofcheck already serves prominent book publishers in North America and Europe.
  • The startup distinguishes itself by using custom-trained open-source models and proprietary algorithms.
  • This investment signifies Proofcheck’s potential to disrupt the content quality assurance market.

Main AI News:

Vienna-based Proofcheck, a pioneering AI startup at the forefront of a content quality revolution powered by Legal Language Models (LLM), has successfully raised €500k in a pre-seed funding round. The funding was led by the early-stage German-Swiss 5502 Fund, supported by BackBone Ventures, and saw participation from prominent entities such as Angel Invest, a European super angel fund led by partner Mara Larson-Richard, Austrian entrepreneur and business angel Gernot Singer, and American technologist Kyle Kosic. Notably, Kyle Kosic is an early OpenAI engineer who contributed to the development of ChatGPT and recently co-founded xAI alongside Elon Musk.

This infusion of pre-seed funding will accelerate Proofcheck’s ongoing efforts to enhance its AI-powered platform and extend its capabilities to cater to the entire corporate content creation lifecycle, encompassing editing and design phases. Furthermore, these funds will facilitate Proofcheck’s expansion into the publishing sector, a thriving $132 billion global market.

Founded in 2022 by the American husband-and-wife duo, Tara Więckowska-Merrigan (CEO) and Alexandre Paris (CTO), Proofcheck has introduced a cutting-edge AI-driven software platform designed to centralize fragmented content workflows. This platform empowers creators to efficiently prepare and refine high-value content such as books, white papers, and corporate reports.

CEO Tara Więckowska-Merrigan, with her extensive experience in book, magazine, and academic publishing, including a stint at the renowned global media company Condé Nast, explains, “Our platform not only establishes a high-quality editorial baseline that streamlines designed content workflows but also meticulously maintains an audit trail of work. By consolidating and automating disparate tedious tasks, Proofcheck ensures a substantial return on investment through unparalleled efficiency gains and time savings.”

Currently, Proofcheck’s product offers visually aware, “pixel-perfect” AI proofing for designed PDFs, the industry-standard format for the mass distribution of professional content. The startup has already made significant inroads, serving approximately a dozen book publishers across North America and Europe, including some of the largest commercial publishers in Germany and the United States.

One satisfied customer, Robert Hyde, Managing Director of UK-based Galileo Publishers, attests to the software’s effectiveness, stating, “We have been using the early versions of Proofcheck for over a year now and have found the software to be highly effective in its speed, accuracy, and cost-saving capabilities.”

Proofcheck’s early success can be attributed to the extensive media coverage it received following the “day zero” investment from Plug and Play, an early investor in tech giants like Google and Dropbox.

Philippe Bernet, Founding Partner at BackBone Ventures, expresses enthusiasm about the collaboration with Tara and Alex, saying, “BackBone is delighted by the collaboration with Tara and Alex. During the investment process, we were captivated by their intelligence, humility, complementary skill set, and extensive network within the publishing and AI industry. With very limited resources, they have crafted an astonishing product already recognized by industry giants who reached out to Proofcheck solely based on a short press announcement. We eagerly anticipate the promising journey ahead with this dynamic team.”

Distinguishing itself from other LLM startups, Proofcheck’s platform stands out by eschewing common general-purpose transformer models like ChatGPT. Instead, it leverages an ensemble of custom-trained open-source models and proprietary algorithms to deliver high-fidelity results while prioritizing customer IP security. Additionally, Proofcheck relies on its AI document parser to swiftly identify the constituent parts of designed content, such as body text, titles, and footnotes.

Kyle Kosic, an investor and advisor to Proofcheck and co-founder of xAI and former Open AI engineer, commends the platform, saying, “Proofcheck goes beyond what any commodity LLM can alone achieve, offering refined tools for each of the many tasks burdening publishers. The resulting product has all of the capabilities and convenience of an AI engine, but it performs with the thoroughness and transparency of a diligent content editor. Most importantly, Proofcheck has found a powerful recipe for building high-quality software – Tara’s vision and industry knowledge intimately paired with Alex’s world-class engineering abilities.”


Proofcheck’s successful pre-seed funding round highlights the growing importance of AI-powered solutions in the content quality assurance market. With its unique approach and established customer base, Proofcheck is poised for significant growth and influence in this space, reshaping how corporate content is created and perfected.