Perwyn exits Interact to Castik Capital — 3.2x return investment.

Perwyn has reached an agreement to sell its stake in Interact Software to funds managed by Castik Capital, completing a successful private equity cycle that delivered a 3.2x multiple on invested capital. The move hands Interact into a new ownership phase focused on accelerating product and go‑to‑market expansion.

Headquartered in Manchester, Interact Software is a cloud-native SaaS provider of employee experience and internal communications tools. Under Perwyn's tenure the business scaled recurring revenue and operational profitability significantly: management reports ARR and EBITDA both rising by >2.5x during the hold, reflecting faster customer adoption across North America, EMEA and the Middle East.

Perwyn’s investment playbook targeted international expansion and capability extension. That plan saw the company prioritise growth in the United States—the firm’s largest market alongside the United Kingdom—add headcount in sales and customer success, and pursue selective bolt-on acquisitions to broaden product functionality. Those moves underpin the case Castik presented for the purchase.

Mark Deed, Investment Director at Perwyn, highlighted the partnership with management and cited the team’s progress in scaling enterprise sales, enriching product features and completing strategic acquisitions. He described the transaction as a validation of the execution delivered during Perwyn’s ownership, and said the business is well positioned for a next leg of growth under Castik Capital.

From a market perspective, employee experience and internal-communications platforms remain an attractive niche inside the broader HR tech and enterprise SaaS markets. Organisations continue to invest in tools that improve engagement, knowledge sharing and remote collaboration; vendors with clear enterprise footprints and recurring revenue models typically command premium valuations and interest from strategic and financial buyers.

For Castik Capital, the acquisition aligns with a private equity strategy focused on scaling European software companies with strong product-market fit and international selling motions. Buyers in this segment often look to drive revenue expansion through cross-selling, geographic rollouts, and product-led upsell—areas where Interact has demonstrated traction.

The terms of the sale have not been disclosed. The parties say the deal remains subject to customary completion conditions. While financial details were withheld, the disclosed 3.2x multiple and reported >2.5x expansion in both ARR and EBITDA point to a material value uplift from Perwyn’s ownership and provide a useful benchmark for investors tracking exits in mid‑market enterprise SaaS.