Citi-backed electronic coupon and voucher company Linkable plans to double its staff using the cash, which took its overall funding above the $50m mark.

Linkable Networks, a US-based company previously backed by financial services provider Citi that enables consumers to link coupons and reward programmes to their payment cards, received $11.7m in funding on Monday.

Although Linkable has not disclosed the investors in the round, the Boston Globe reported that they are venture capital firm Kepha Partners, VC funds CommonAngels and BlueChip Ventures, and several unnamed individuals.

Retail customers can connect a brand’s one-time coupons, rebates or loyalty schemes directly to their debit and…