BloodBridge: connecting urgent blood requests with nearby, eligible donors in minutes

BloodBridge's volunteer coordinator showed us a WhatsApp group where an urgent request for a rare blood group had been forwarded dozens of times. Hundreds of people saw it; many had the wrong blood group, lived across the city or had donated recently. The request was eventually met — hours later — by a donor who had nearly missed the message among the noise.

We spoke to regular donors, hospital blood bank staff and volunteers. Donors were willing but annoyed by irrelevant messages. Hospitals worried about fake or duplicate requests. Volunteers spent hours making calls. Everyone wanted fewer, better-targeted requests and a clear confirmation when a need was met.

Verified hospitals raise requests through a portal. BloodBridge finds compatible donors who are eligible — based on their last donation date — and nearby, and notifies them in widening circles until enough have responded. Once the hospital confirms donations, the request closes and everyone else is told it has been met.

Donors see their donation history, next eligible date and the difference their donations made, which keeps them coming back.

A small team working with volunteer coordinators every week.

Agreed with the charity's trustees and coordinators.

Everything that shipped for donors, hospitals and coordinators.

We imported the charity's existing donor lists with consent, invited donors to the app and onboarded hospitals one by one after verification. WhatsApp groups were gradually retired as requests moved to BloodBridge.

Relevance is respect. Donors stayed engaged because they were only asked when they could help.

Close the loop. Telling donors a need was met reduced repeated calls and built trust.