is the bridge out? Download our free resource and find out!
bellcurve logo transparent
Bellcurve logo featuring a yellow semicircle to the left of the dark blue text 'bellcurve'.

Not every donor can visit your programs. We help them feel like they have.

bellcurve helps organizations apply results-based methodology to their communications, so donors feel the impact of their gift, stay longer, and give more.

Donors who believe don't leave.

about bellcurve
Bonar Bell sitting next to a smiling child in a pink shirt and knee pads on a red concrete bench in Zambia.

4 out of 5 first-time donors never come back. Not because they stopped caring — but because nobody told them their gift made a difference.

Your donors are on the road to loyalty... Could the bridge ahead be out?

Most fundraisers are doing stewardship right. Sending updates, closing the loop, following the frameworks. But, they're still losing donors.

This free resource helps fundraising leaders to diagnose where their donor communications are falling short, and what can be done to fix it.

get your copy
Bonar Bell sitting next to a smiling child in a pink shirt and knee pads on a red concrete bench in Zambia.

The gap is real. Together, we can close it.

Cover of ChildFund New Zealand's 2020 Impact Report titled 'thrive' featuring a woman hugging a smiling child, alongside an open report page about COVID-19 response.

touchpoints that close the loop for your supporters

Short-term, focused projects - reports, campaigns, and donor communications built on results-based methodology. Concrete, deliverable, and designed to demonstrate impact by showing supporters what their gifts have made possible.

are your donors on the road to loyalty?
Person holding tablet displaying Amnesty International donation appeal with text The Time Is Now and images of people amid rubble.

new systems and tools integrated with your theory of change

Transform the way you work - a new website or digital infrastructure that doesn't just look better, but enables you and your donors to engage differently. Built backwards from your outcomes, so every touchpoint reflects the impact your organization actually delivers.

new systems and tools integrated with your theory of change

Transform the way you work - a new website or digital infrastructure that doesn't just look better, but enables you and your donors to engage differently. Built backwards from your outcomes, so every touchpoint reflects the impact your organization actually delivers.

are you telling one story — or two?
Person holding a tablet showing Amnesty International's donation campaign with the text 'The Time Is Now' over images of war devastation and displaced people.
Two people at a protest holding signs that say 'Not in my name, not in the name of science' and 'End animal testing, It's time Aotearoa!' with an image of a white lab mouse.

a donor engagement strategy built for impact

The foundation everything else is built on. An ongoing partnership that delivers a clear strategic framework — connecting your short-term, medium-term and long-term outcomes to your donor communications, so your organization stops describing activities and starts demonstrating change.

let's have a chat

Are you ready to demonstrate proof of concept?

four spaces left

I'm taking on four founding clients at half my standard rate. In return, you get embedded strategic partnership from day one, and I get the proof of concept that bellcurve delivers.

four spaces left

I'm Bonar Bell, founder of bellcurve.

For the better part of two decades, I've been drawn to organizations that exist to make the world better — working directly with program communities, building impact frameworks, shaping communications strategies, and raising millions of dollars for good.

For the better part of two decades, I've been drawn to organizations that exist to make the world better — working directly with program communities, building impact frameworks, shaping communications strategies, and raising millions of dollars for good.

I've visited programs and escorted donors on field visits across more than 20 countries. Every time, the same things happen: retention goes up, lifetime value goes up, the relationship deepens. The experience of seeing impact firsthand is transformational. There's a reason why child sponsorship remains the gold standard in retention: donors can feel the impact of their support without ever having to leave the comfort of their home.

That's exactly why I created bellcurve — to close the gap between the impact you create and the stories your supporters deserve to hear.

Photos of Bonar Bell during field visits across 20+ countries
Yellow half-circle shape on a black background resembling a bell curve icon.

"What stands out most is Bonar's ability to blend creativity with practicality. Whether it was crafting visually stunning designs, developing user-friendly websites or devising effective fundraising strategies, he approached every task with innovation and precision. He is not only incredibly talented but also reliable and dedicated to achieving the best possible results."

Tara Jackson,

Beyond Animal Research (BAR)

"Bonar is both strategic and a big-picture, creative thinker. He prides himself on professionalism and is highly driven and solutions-focused. He is also one of those rare individuals who can turn their hand to anything to get the job done (and his high standards means he does it well!)."

Shona Jennings,

ChildFund New Zealand

"Bonar has proven skills across a wide range of disciplines, including developing and executing strategy, creating and implementing successful campaigns... He researches effectively, identifies trends and opportunities, plans effectively and delivers outstanding results consistently."

Leanne Tiscornia,

ChildFund New Zealand

"Bonar is a truly gifted and talented communications and project manager. What sets Bonar apart is his enthusiasm and genuine caring about the outcomes and overall success of every project he manages. He gives 110% effort while delivering unique insights and valuable perspectives that truly make a difference."

Christine Lukewich, CFRE,

Christian Children's Fund of Canada

Your supporters gave you a gift. Show them what it meant.

let's talk