Syntho acquires the MOSTLY AI brand

Amsterdam-based company Syntho announced the acquisition of the MOSTLY AI brand on 9 June 2026. With the move, Syntho adds a well-known name in the synthetic data market to its portfolio, a market in which the company has been active since its founding in 2020.

Syntho develops software that enables organisations to generate synthetic test data that realistically mimics production data without using real personal information. MOSTLY AI was a competitor with a similar focus on the synthetic generation of structured data, particularly for use in sectors such as finance and healthcare. Financial details of the transaction have not been disclosed.

With the brand acquisition, Syntho aims to extend its reach and give more organisations access to synthetic data. The company describes the move as a step towards broader global availability of its technology, though concrete plans for product development or brand integration have not yet been published.

What Syntho does and where MOSTLY AI came from

Syntho was founded in Amsterdam in 2020 and focuses on replacing sensitive production data with synthetic equivalents. This synthetic data retains the statistical properties of the original dataset but contains no information that can be traced back to individuals. That makes it suitable for software development, testing and data analysis, without organisations running into conflict with privacy legislation such as the GDPR.

MOSTLY AI was an Austrian player in the same segment. The company also focused on generating synthetic tabular data and had clients in, among others, the financial sector. Based on available source material, little is known about the exact scale of MOSTLY AI, its customer base or the state of the company prior to the acquisition. Syntho has confined its announcement to the strategic rationale, stating that the combination strengthens its market position.

The synthetic data market has been attracting increasing attention in recent years, partly because organisations are looking for ways to train AI models and test software without having to use large volumes of real customer data. Privacy regulations and the growing complexity of cross-border data sharing play a role in this.

Brand strategy and what remains unclear

The announcement explicitly concerns the acquisition of the MOSTLY AI brand. Whether intellectual property, software, customer contracts or employees have also been acquired cannot be confirmed on the basis of available information. Syntho has limited its communication to the strategic objective: increasing brand recognition and reach in the international synthetic data market.

It is also not yet clear whether MOSTLY AI will continue to exist as a separate brand alongside Syntho, or whether it will eventually be folded into the Syntho label. For existing users of MOSTLY AI products, it remains unknown what the acquisition means for support and further development of the software.

Syntho is headquartered in Amsterdam and is therefore part of the Dutch startup ecosystem, although the company serves clients in multiple countries. Further details on the integration strategy or the commercial terms of the deal are not available at this time.

Synthetic data as a growing segment in Europe

Syntho's move fits into a broader trend in which European companies in the AI and data segment are attempting to grow faster through acquisitions than would be possible organically. For investors and other founders in the Dutch ecosystem, it is notable that a relatively young company, founded in 2020, is already making brand acquisitions to strengthen its international position.

At the same time, the acquisition illustrates the consolidation taking place in the synthetic data segment. Multiple players have focused on comparable technology in recent years, and it stands to reason that not all of them will continue to exist as independent brands. For policymakers working on European AI regulation and data-sharing frameworks, the scaling up of companies like Syntho is relevant: broader adoption of synthetic data could make compliance with privacy rules in AI applications more practical for organisations.