Ask an accountant where the money actually leaks in their practice and they rarely point at their fees. They point at the space in between. A client says yes. Then someone copies the scope into a proposal tool, chases a signature, re-types the numbers into an invoice, emails a payment link, and follows up twice before the money lands. Every one of those hops is a place a task stalls or a bill goes uncollected. Cone, a Y Combinator Summer 2022 company, was built to make that whole stretch disappear.
The company describes itself as an AI-powered work operating system for professional service businesses. Stripped of the category language, Cone is one place where an accounting firm can build a proposal, get it signed, turn it into a running project, bill against it, and collect payment - without leaving the platform or re-keying anything. It is a bet on a boring, daily, expensive problem rather than a flashy one.
01What Cone actually does
Cone ships as two connected products. Cone Propose handles the front of the deal: branded web proposals, engagement letters, e-signatures, quote generation, invoicing, and payment collection over ACH, direct debit and cards. It tracks when a buyer opens a proposal, so a firm is following up on interest rather than into silence. Cone Practice handles the back: the moment a proposal is signed, it becomes a live project, with tasks, a client portal for forms and file requests, time tracking, document management, and billing tied to the original proposal.
The connective idea is that the proposal is the source of truth. What a client agreed to buy is the same object that schedules the work and generates the bill. Nothing gets transcribed from one system into the next, which is exactly where firms today lose hours and drop details.
That framing also changes what a firm is buying. A proposal tool sells you better-looking documents. A billing tool sells you faster collection. Cone sells the absence of the handoff between them - the thing that never shows up as a line item but quietly eats an afternoon a week. It is a harder value to demo and an easier one to feel after a month of using it.
02Who it is for
Cone is pointed squarely at accountants, bookkeepers, and the firms they run - from a solo practitioner to a growing multi-seat practice. These are workflow-driven businesses: their profitability is a direct function of how cleanly work moves from sold to delivered to paid. Named users on the company's site include Beans Accounting, SafeHands, 3ES, RR Accountants and BetterLed Consulting. It is a narrow audience by design. When the buyer lives inside the same three or four screens all day, removing friction from those screens is worth paying for.
There is a reason the audience is this specific. General-purpose proposal or project software has to please a marketing agency, a law firm and a consultancy at once, so it optimizes for flexibility. Accountants do not want flexibility; they want the same clean path every engagement, every quarter. Cone can hard-wire the accounting firm's path - engagement letters, recurring billing, tax-season workflows - in ways a horizontal tool cannot without becoming a maze of settings.
03The problem, stated plainly
A typical firm stitches together a proposal app, a separate e-signature tool, a spreadsheet or project board, an accounting package for invoices, and a payment processor. Each handoff is manual, and each one is a chance for revenue to slip: a proposal that never gets countersigned, work that starts before terms are locked, an invoice that lags the delivered work by weeks. Cone's argument is that these are not five problems. They are one problem wearing five logins.
04How it is different
The proposal-to-payment idea is not unique to Cone - Ignition built a business on it, and Karbon, Canopy and TaxDome all circle the same accounting-firm buyer from different angles. Cone's wedge is two-fold. First, price: Cone Practice starts at $8 per user per month and Cone Propose at $13, well under the incumbents, which lowers the bar for a small firm to try it. Second, integration depth: rather than bolting billing onto a proposal tool, Cone treats the signed proposal as the object that drives the project and the invoice, so the sales end and the delivery end are the same system rather than two products that sync.
05The business model
Cone sells subscriptions priced per user per month, with a free trial and about a 30% discount for paying annually. Add-ons - multiple signers, multiple pricing packages - are billed per user on top. Underneath the seat fees sits a second, quieter revenue surface: because payments run through the platform on top of Stripe's billing rails, every invoice a firm collects through Cone flows across Cone's own plumbing. That combination, a low headline seat price plus transactional volume, is a classic land-and-expand shape. Get in cheap as the tool a solo bookkeeper uses for one proposal, become the system the whole firm runs its revenue through.
06Who is building it
Cone was founded in 2022 by Jahangir Mohammed (CEO) and Bharath Kumar Reddy (CTO). Mohammed is a repeat founder - he co-founded Joveo, the recruitment-advertising platform, and helped scale it from four people to roughly three hundred, learning the unglamorous mechanics of getting a B2B product to fit its market. He holds an MS in computer science from Stony Brook. Reddy was a founding engineer at Rialtic, a healthcare-claims platform that raised a $45M Series A, and holds bachelor's and master's degrees in electrical engineering from IIT Madras. The team is small and engineering-led, working remotely across a San Francisco base and a Hyderabad office.
That background matters to the product choice. Neither founder came from accounting, but both came from companies where the difference between growth and stall was operational discipline. Cone reads like software built by people who respect the back office rather than romanticize the front of the funnel.
It also explains the split-base setup. Building a US-facing accounting product from a Hyderabad engineering team means the people writing the code are not the people writing the invoices, so the product has to earn its understanding of the customer through close contact rather than lived experience. The named early customers and the 4.9 rating on G2 suggest that loop is working - the reviews read less like people wowed by a demo and more like people relieved to have stopped doing something by hand.
07Where it fits in the market
Vertical SaaS - software built for one industry rather than one job - has been one of the more durable software categories, and accounting is a textbook fit: high tool-switching cost, workflow-obsessed users, and real money moving on a schedule. Cone is not trying to replace QuickBooks or Xero; it sits above them, as the layer where a firm proposes, delivers and collects. Backed by Y Combinator, General Catalyst, Khosla Ventures and XYZ.vc with about $1.83M raised, it is still early and small against better-funded incumbents. Its edge is focus and price, and the strategic question ahead is whether the payments layer and the proposal-as-source-of-truth design are enough to pull firms off tools they already tolerate.
The most interesting thing about Cone is not any single feature. It is the decision about what to build around. Plenty of companies would have chased AI that writes tax returns. Cone went after the plumbing between a client saying yes and money arriving - the part of the job accountants like least and can least afford to fumble. Whether it wins the category or not, that is a clear read on where a firm's real friction lives.