About a-team Marketing Services
The knowledge platform for the financial technology industry
The knowledge platform for the financial technology industry

A-Team Insight Blogs

Glue42 and Finsemble Merge to Form Interop Powerhouse interop.io

Subscribe to our newsletter

Finsemble and Glue42, two firms specialising in desktop interoperability and automated workflows, have announced their merger to form a new entity, named interop.io, which positions itself as a key player in the interoperability sphere within capital markets and beyond.

This merger combines the acclaimed technologies of both firms, to offer what will be a comprehensive suite of interoperability products. At the heart of this suite is io.Connect, a solution that facilitates the creation and deployment of intuitive front ends, which amalgamate different applications and functionalities into a single smart desktop, while also providing the necessary components for a managed and flexible deployment of interoperability-powered workflows.

Both Glue42 and Finsemble have experienced significant growth in recent years as desktop interoperability has become a high priority for capital markets firms. The merger promises to accelerate the progress made by both companies. By leveraging the combined capabilities of both teams, the new entity interop.io aims to build on the existing momentum and industry leadership that has driven their prior growth and customer success.

Leslie Spiro, formerly CEO of Glue42, will serve as interop.io’s CEO, with Dan Schleifer, formerly CEO of Finsemble, assuming the role of President. Commenting on the merger, Spiro said: “Capital markets require advanced, automated workflows from application to application, and from user to user. Only interop.io has the technology stack to deliver this.”

Interoperability, referring to the integration of data and UI of applications, has become a notable trend in capital markets. It is recognised as a key transformative technology within the industry. Paired with the universal FDC3 API standard for application interoperability, it is now employed in production by large buy sides, sell sides, and technology vendors across the sector.

Schleifer commented: “We believe the industry requires a single firm to act as the standard-bearer for interoperability and advanced workflow automation. We merged to form interop.io to expedite our shared company vision of delivering a top-tier solution with demonstrable ROI.”

Earlier this year, under the leadership of Schleifer and Terry Thorsen, Finsemble was spun off from Cosaic as a standalone business and secured a round of funding from investors including Citi North America, Illuminate Financial Management and Digital+ Partners.

Rhyddian Olds, Head of UI and Services for Citi’s institutional business and a Finsemble client, added: “We look forward to the potential benefits to Citi’s interoperability initiatives, workflow automation and customization with the interop.io product offering as a result of the merger.”

Finsemble and Glue42, both having experienced record-breaking years in terms of product development, client success, and revenue growth, share a common mission to create Straight-Through Workflows. These aim to integrate and streamline the work of capital markets professionals, enabling them to focus on higher value tasks. The merger is seen as a strategic move to capitalise on these successes and deliver interoperability solutions at an accelerated pace.

interop.io enters the market with three key strengths: advanced technology, a committed client success team, and proven stability and growth. With the support of optional cloud or on-prem services, the firm offers a comprehensive interoperability solution for desktop and web. Moreover, as a profitable entity with strong revenue, fast growth, a large R&D team, and numerous smart desktops in production, interop.io emerges as a significant player in the industry.

Subscribe to our newsletter

Related content

WEBINAR

Upcoming Webinar: Navigating the Build vs Buy Dilemma: Cloud Strategies for Accelerating Quantitative Research

Date: 20 May 2026 Time: 10:00am ET / 3:00pm London / 4:00pm CET Duration: 50 minutes For many quantitative trading firms and asset managers, building a self-provisioned historical market data environment remains one of the most time-consuming and resource-intensive steps in establishing a new research capability. Sourcing data, normalising symbologies, handling corporate actions and maintaining...

BLOG

Finastra’s Summit Crowned Best AI-Enabled App at Inaugural AI in Capital Markets Awards

Finastra has secured the award for “Best AI-Enabled App for Capital Markets” for its Summit solution at the first-ever AI in Capital Markets Awards, hosted by the A-Team Group. This new awards programme recognises the growing importance of artificial intelligence in transforming capital markets by honouring the leading AI-driven solutions that deliver significant value to...

EVENT

TradingTech Summit New York

Our TradingTech Summit in New York is aimed at senior-level decision makers in trading technology, electronic execution, trading architecture and offers a day packed with insight from practitioners and from innovative suppliers happy to share their experiences in dealing with the enterprise challenges facing our marketplace.

GUIDE

Regulatory Data Handbook 2018/2019 – Sixth Edition

In a testament to the enduring popularity of the A-Team Regulatory Data Handbook, we are delighted to publish a sixth edition for 2018-19 of our comprehensive guide to all the regulations and rules that might impact data and data management at your institution. As in previous editions of the Regulatory Data Handbook, we have updated...