Callum King and the business of loose ends

Callum King spent two years looking for a company that, in the end, he would help create. He was building the financial technology investment practice at Comcast Ventures. The assignment placed him among businesses offering ways to manage money. Yet the service he wanted remained elusive: somewhere an employee could turn for practical help across the messy entirety of a financial life.

An investor can usually respond to an unsatisfying market by making another call. King eventually changed jobs. He left Comcast Ventures to help start Brightside, moving from judging what a company might do to sharing responsibility for what it actually did. The distance between those two activities can be measured in customers waiting for an answer.

Years later, he would co-found Anatomy Financial with his wife, Sasha King. There, the loose ends included paper payments, disconnected records, and the work required to make the books agree. Taken together, the two companies suggest a recurring interest in his career: the inconvenient financial job that survives after all the available products have done their individual parts.

The investor who ran out of companies to call

King’s early résumé supplies the familiar addresses of a finance career. Harvard awarded him a bachelor’s degree in economics; his undergraduate years ran from 2004 to 2008. A summer in Goldman Sachs investment banking preceded work at Summit Partners. He later earned an MBA at Stanford, attending from 2011 to 2013. By April 2015, he was a principal at Comcast Ventures.

One piece of his writing from that period makes the later career easier to read. In May 2015, King set out Comcast Ventures’ reasons for investing in Zenefits. He described software connecting payroll, benefits, and other personnel systems through a common employee record. His attention went to the reduction of administrative work and the experience of the person using the system.

The subject was HR software, but the underlying attraction was the connection. Several systems could become more useful when they shared a record. It is an idea with an unassuming exterior. Nobody throws a party because two databases agree. The person who previously had to reconcile them might, however, consider leaving work on time.

At Comcast, King began working with Shawn Leavitt, who led the company’s Total Rewards program. Their discussions concerned the financial difficulties employees encountered and the possibility of a service that would help them navigate those decisions. King’s search for an existing answer continued for two years. Eventually, the absence of a satisfactory company became a reason to establish one.

A meal, rather than another menu

Brightside’s public launch in May 2018 came with $4 million in seed backing from Comcast Ventures and Trinity Ventures. Comcast was also an early customer. King had crossed out of its investment team while keeping a connection to the organization that had helped expose the need. Michael Yang, his former colleague, described King as the first person to join the effort.

The team included Tom Spann and Jacky Chiu, alongside colleagues with experience in benefits, technology, and customer service. Its product combined software with human financial assistants. Employees could seek help with decisions involving borrowing, savings, credit, and the ordinary complications that refuse to arrange themselves into a tidy product category.

King had a concise objection to services that stopped at instruction. Explaining a financial problem did not necessarily give someone the means to resolve it. In a 2019 interview, he reached for the kitchen, comparing financial coaching to offering someone a cookbook when they needed dinner. A cookbook is a respectable object. Its chief shortcoming, at the crucial moment, is that one cannot eat it.

“If you’re hungry, you don’t need a cookbook, you need a meal.”

Callum King, 2019

In 2018, King described the kinds of results the company was pursuing: reducing credit-card interest through refinancing, helping people think through student loans, and building emergency savings. He offered a small example of what that last task meant. A broken taillight should not automatically require another loan. The example brings the product down to a recognizable scale. A car needs a repair; a household needs enough room in its finances to pay for it. For the person using the service, the test comes on that day, well beyond the product demonstration and its reassuringly orderly screens.

That distinction gave Brightside an operational obligation. A person had to be available; the help had to extend beyond explaining what ought to happen. King also emphasized building alongside early customers. Comcast’s involvement offered a way to understand what an employer and its employees needed before mistaking an internal product discussion for evidence from the outside world.

The view from the other side of the table

Founding also gave King a different kind of information. He recalled one Brightside launch that attracted, within its first 24 hours, the demand forecast for three weeks. The team rallied to serve the customers. A forecast had become a queue. For a former investor, that is a particularly concrete education in the difference between a market opportunity and the work of meeting it.

His advice to other founders was to get away from screens and statistics long enough to understand the user’s circumstances. Read alongside the launch story, the advice has a practical edge. People can arrive faster than a model expects. A company’s promise then depends on the colleagues doing the answering, with whatever capacity the business has actually built.

The customer-facing staff were central to his account of Brightside. He described the financial assistants as the people who embodied the business when somebody asked for help. The company’s current board listing still includes King as a co-founder. His operating chapter there ended before Anatomy, but Brightside remains a visible connection in his professional life.

There is also a revealing perspective from someone who worked for him. Daniel A. Chen first knew King as an investor and later joined him at Brightside. Chen’s public recommendation describes warmth, authenticity, positivity, and a tendency to act. It is a colleague’s assessment, and it fits the unusual vantage point: he saw King on both sides of the investing-to-operating divide.

A company built with Sasha

In October 2022, King began his next founding role at Anatomy Financial. This time the person beside him had already lived with the financial processes the company would address. Sasha King had worked as chief commercial officer at CareDx. Her experience included the manual work of understanding revenue and managing financial information across systems.

They are married, and they became co-CEOs. In describing the launch, Sasha credited Callum’s experience with embedded finance and the lessons of having already built a startup. The partnership joined knowledge of the recurring administrative problem with experience turning financial services into a business. Tony Bako joined the leadership as chief technology officer.

Anatomy announced its public launch in February 2024, alongside $7.6 million in funding. Lightspeed Venture Partners led the seed round, with other backers including Meridian Street Capital, Live Oak Ventures, Cambrian Ventures, and Peterson Ventures. The company worked alongside customers’ existing systems, taking on financial processes that otherwise required spreadsheets and manual intervention.

This was a different customer from Brightside’s employee, with a different daily routine. Still, the family resemblance between the businesses is visible. Both deal with the distance between having access to financial products and getting a financial task completed. The difficulty sits in the connection: the questions, transfers, and unfinished work between established services.

Making the bank meet the paperwork

A deposit and a financial record can each be perfectly legible while remaining awkward to connect. Anatomy’s software brings banking, accounting, and payment information together. Its lockbox service receives paper mail and converts it into a digital workflow; its reconciliation tools help connect incoming money with the records explaining it. The ambition is legibility across the whole process.

In June 2024, Live Oak Bank announced Anatomy as its first embedded banking partner. Customers could access Live Oak banking services through Anatomy’s platform, while their accounts were held and serviced by the bank. The arrangement connected the software workflow to an actual banking relationship. For King, it extended the embedded-finance experience Sasha had identified in explaining their partnership.

December brought a $19 million Series A led by Canapi Ventures. The announcement also named Canapi’s Neil Underwood and Lightspeed’s Nicole Quinn as incoming board members. In King’s own announcement, the emphasis fell on practical applications of AI, customer results, and the team supporting the work. The funding supplied a milestone for a business concerned with decidedly recurring tasks.

There is a pleasingly modest object at the center of this particular technology story: the envelope. A company can deploy AI and negotiate banking partnerships, yet its usefulness may begin with handling something that arrived through the post. The envelope has survived several declarations of the digital future. It deserves, at minimum, a formidable opponent.

The loose end is the job

King’s path is often described by its institutions: Harvard, Stanford, Comcast Ventures, Brightside, Anatomy. The decisions between them give the list its movement. He searched for a service, helped create one, worked with people delivering it, and then brought that experience into a new company with Sasha. Each founding chapter drew him closer to the mechanics of getting something done for a customer.

That pattern offers a useful way to read his ambitions at Anatomy. The work is specific enough to resist a grand speech: receive the document, make the information usable, connect the payment. For a founder who once wanted a meal to accompany the cookbook, it is familiar territory. There is a financial job waiting, and somebody has to finish it.