Celestial Divide vs. FairSplit

If you are an executor or trustee trying to divide an estate, you have probably found both of these tools and struggled to tell them apart. They look similar from the outside, but the engine behind them works differently.

We here at Celestial Divide tried to be accurate about what FairSplit does, and we have used their own published documentation rather than characterizing them. Every claim we make about FairSplit below is footnoted to the page it came from, so you can check it yourself. Where FairSplit is ahead of us we say so, and there is one place where it clearly is.

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The short answer

FairSplit divides the contents of a house. Celestial Divide settles the estate.

FairSplit is a long-running, well-documented tool for cataloging and allocating tangible personal property. It has been at this since the founder started exploring the idea in 2010.¹⁷ It does not handle financial accounts, real property, court deadlines, or estate accounting, and it does not claim to.

Celestial Divide covers the whole settlement, and its fairness engine does something FairSplit's rounds are not designed to do: it finishes the job. FairSplit divides the items and then hands the hard part back to you. Its own manual says the disparity in what each heir received is "up to the Administrator" to resolve.³ Ours computes the equalization as part of the solve.

Choose FairSplit if you want AI photo cataloging to build an inventory from a house full of objects, and someone else is handling the division and the financial side.

Choose Celestial Divide if you actually have to divide the estate and defend the result. That holds whether the shares are equal or unequal, and it holds harder once real property, financial accounts, or a single large item is in the mix.

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At a glance

Prices and features retrieved from public sources on 2026-08-25. Full source list at the end of this article.

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How FairSplit actually divides an estate

FairSplit's method is well documented, and to their credit they publish a full manual explaining it. It runs in three round types.

Round 1, Asset Review. Every heir marks each item yes or no, privately. In FairSplit's words, divisees "click YES for items they may have an interest in, or NO for items that they are fine to see sold or donated," and "any asset marked YES by even one divisee will appear in future division rounds."⁵ Nothing is allocated. The purpose is to find the items nobody wants, which in most estates is the majority of them, so they can go to sale or donation immediately. This is quietly the most useful thing in the product.

Round 2, Emotional Value. Each heir gets a budget of Emotional Value credits, "determined by the administrator (e.g., 500 EVs)," and places blind sealed bids on the items they care most about.⁶ Highest bid wins the item. Heirs choose from "a range of 1 to 15 assets" to bid on, with 3 to 10 recommended, which stops people from spreading a single credit across everything.⁶ Ties are resolved first at random, which FairSplit describes as "much like a coin flip," and if someone is tied on multiple items, the system "awards the asset to the divisee who has received the fewest items in this round."⁶

Round 3, Selection Order. Each heir ranks the remaining items, placing "the most important ones at the top and the least important at the bottom."³ The system then runs what the manual calls snake ordering: "if there are 3 parties, the order is 123 321 123 321."³ At each turn it assigns "the item that he/she ranked highest and is still available."³ FairSplit describes the result plainly: it is "the same as if people had taken turns choosing one asset each turn."⁴

Sealed-bid auctions and snake drafts are real mechanisms with a real literature behind them. They are also, both of them, procedures for deciding who picks what rather than methods for producing a fair outcome, and that distinction is the whole subject of this article.

Notice what none of the three rounds do. None of them look at what each heir is entitled to. None of them compare the dollar value of the resulting piles. None of them produce a number anyone owes anyone. When the last item is assigned, the software has finished and the actual problem, which is that three people just received three unequal piles, is still sitting on the executor's desk.

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The two gaps that matter for a real estate

Gap 1: unequal shares

If the will says one child gets 40%, another 35% and a third 25%, neither of FairSplit's allocation rounds accounts for it.

This is not our characterization. It is in FairSplit's manual, verbatim:

The allocation percentage is for reference only. It does not block selections and it is not considered in the distribution algorithms of division rounds.¹

Their public FAQ says the same thing in different words: those percentages "are for reference only and do not block selections or make a difference in round results."²

There is one partial lever. In the Emotional Value round, an administrator "can choose to allocate the same number of EV points to all divisees or distribute them in varying percentages," so a 40/35/25 estate could get 400/350/250 credits.⁶ That biases the auction round. It does nothing to the Selection Order round, where the snake draft gives every heir the same number of picks no matter what they are entitled to.

FairSplit's own remedy is manual and after the fact. The manual tells administrators they "may decide to change the information in the 'Distribute' column ... in order to help re-balance the fair market value to more closely match each divisee's allocation percentage."³ That is an executor editing a spreadsheet column, not an algorithm honoring the will.

Celestial Divide treats the entitlement as an input to the allocation, not a note in a field. The engine is solving for a division that respects the shares the will actually specifies, and the executor can set how much disparity is acceptable rather than discovering it after the fact.

Gap 2: the cash true-up

Here is the part most people miss, and it is the single most important idea in fair division.

When you are dividing indivisible things, a genuinely fair split is usually impossible without money changing hands.

Three heirs, one house, one cabin, one coin collection. There is no way to cut those three items into three equal portions. Someone gets more. The only way to make it right is a cash adjustment: the person who took the more valuable share pays the difference into the estate, and it flows to the others.

FairSplit tracks the numbers you would need. It adds each item's fair market value to the winning heir's running total, and it reports those totals. But the manual is candid that the fix is a human job:

After Selection Order rounds have divided all items of interest between the heirs, it is up to the Administrator to review the distribution of fair market values and determine how the family will deal with disparity.³

Their documented practices for reconciliation are all manual: heirs write checks to the estate, or items get put back in the pool and re-picked. Both work. Both put the executor back in the position of proposing a number to their own siblings, which is exactly the conversation the software was supposed to prevent.

Celestial Divide computes the equalization as part of the solve. Debt offsets are handled. So is the fact that a dollar in a traditional IRA and a dollar in a taxable brokerage account are not the same dollar after tax, which matters a great deal on a $1M to $5M estate and is invisible if you are only tracking market values. Our own description of it is that scenarios "compare what people actually receive," which is the whole point of doing the tax math inside the engine instead of leaving it to whoever is holding the spreadsheet.

Two related pieces sit alongside it. Sale floors mean an asset headed for sale carries a realistic reserve, with realtor fees, taxes and transaction costs accounted for, so the number feeding the equalization is what the estate will actually net rather than a hopeful list price. And when nobody wants an item, the proceeds from selling it can be routed toward balancing the overall distribution instead of simply being split evenly. That is a small mechanism with a large effect: the pile of unwanted furniture becomes a tool for closing the gap rather than a separate transaction.

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"But our estate is a simple even split"

Most estates are. Three kids, equal thirds, one house of belongings. It is worth being clear that an even split does not make any of the above go away, because this is the case FairSplit is built for and it is still the case where the method leaves the most on the table.

Equal shares change the target. They do not change the arithmetic.

Say the estate is three equal heirs and the personal property comes to $300,000. Fair means each heir ends up with $100,000. Run FairSplit's rounds and you will get three piles, and those piles will not be worth $100,000 each. They cannot be. The items are indivisible and the rounds never once consult the dollar values while assigning them. FairSplit's own guidance on a three-person snake round is that "two divisees will get 3 and one will get 2."⁷ The piles come out uneven by construction.

At that point you are exactly where the unequal-shares executor is: holding a report that shows three different totals, and personally responsible for proposing who writes a check to whom. FairSplit's manual is direct that this is your job, not the software's.³ The equal split did not spare you the conversation. It just made the target number easier to calculate before you have to go have it.

There is a second thing equal shares do not fix. The snake draft's first-picker advantage does not care about entitlement. Whoever goes first in each cycle gets the better of what remains, every cycle, and reversing the order produces a different division of the same estate. Between siblings who are watching the process closely, "why did the order come out that way" is a real question with no satisfying answer.

What Celestial Divide does differently on an even estate is the same thing it does on an uneven one. Equal entitlements go in as the target. The engine allocates against each person's own valuations, computes what each heir actually received after tax treatment and debt offsets, and produces the balancing payment that brings all three to their third. If one sibling takes the truck and the tools, the report says what she owes the other two and why. Nobody has to propose that number across a kitchen table.

The pitch is not that we are the unequal-shares tool. It is that we finish the division. An even split needs finishing too.

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What "fair" actually means, and why it is a technical question

Most tools in this category use the word "fair." Very few say what they mean by it. It is worth being precise, because the definitions are different and they produce different outcomes.

Proportional means every heir receives at least their entitled share, measured by their own valuations. If you are entitled to a third, you get something you personally consider worth at least a third.

Envy-free is stronger. It means that when the division is done, no heir would rather have someone else's share than their own. Not "no one complained." No one has a rational reason to prefer a sibling's pile.

For more than two people, envy-freeness is strictly harder than proportionality. You can hit your third and still look across the table and think your sister did better.

A snake draft is neither. The person picking first has a structural advantage in every cycle. Reverse the order and the same items land differently. FairSplit's own guidance concedes the uneven counts: in a three-person round, "two divisees will get 3 and one will get 2, as long as all three follow the instruction."⁷

A sealed-bid credit auction is not envy-free either. An heir who spends all 500 credits on the cabin wins the cabin and little else. The system records the imbalance. It does not resolve it.

Celestial Divide's engine is built on envy-free division: an allocation where no heir would trade their share for another's, evaluated against the percentages the will actually specifies, with cash transfers used to close the gap where indivisible items make an exact split impossible. That last clause is the whole trick. Envy-freeness over indivisible goods is generally unattainable. Add equalizing cash, and it becomes reachable.

That is what the engine is for, and it is why the equalization is not a separate feature bolted on the side. It is part of the answer.

Two things follow from taking the definition seriously. The first is that the engine has to work from each person's own numbers rather than the appraisal alone, because the same lake house is worth different things to different people. Beneficiaries value each asset privately against a good faith estimate, moving above or below that baseline, and that private input is what the solve runs on.

The second is that fairness has a dial. Perfect envy-freeness is not always reachable, and an executor sometimes needs to accept a small disparity to get an allocation that closes. Celestial Divide lets you set that tolerance deliberately instead of discovering it in a final report. The judgment stays with you. The computation is handled, checked, and documented.

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Where FairSplit is ahead of us

One place, and it is a real one.

AI photo cataloging. FairSplit will "name, describe, categorize, estimate value" from an uploaded photograph today.¹⁵ Celestial Divide will not. If you are standing in a house with four hundred objects and no list of any kind, their camera is faster than our spreadsheet, and that is a genuine advantage at the stage of the job where most people give up. We are building toward it. They have it now.

That is the honest extent of it. Getting the inventory in is where FairSplit is better than us. Everything after that, we would argue the other way, and the rest of this article is that argument.

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Other differences worth knowing

Not advantages exactly, but real differences you should have in front of you.

They have been at it longer. FairSplit traces its origins to 2010¹⁷ and holds a granted US patent from 2014 on its division method.¹⁸ Celestial Divide's engine is patent pending. A patent describes a method; it is not evidence that the method produces a fair outcome, and the limits described earlier in this article are drawn from their own current documentation rather than from the patent. But if institutional age is something you weigh, they have more of it.

They sell administration as a service. FairSplit will supply an independent administrator: "If you need an independent Administrator, we can provide that service,"¹⁶ at $300 to $750 depending on plan.¹² If you are both the executor and an heir, that conflict is real and worth solving. Celestial Divide includes Trusted Professional Network access to connect you with a professional, but we do not sell administration under one contract the way they do. Worth noting that hiring a neutral administrator solves the conflict problem, not the arithmetic problem. The administrator still has to work out the disparity by hand, because the software still does not.

Their entry price is lower for a narrow job. $350 covers up to 3 divisees and 300 items.¹² Ours is $500 with unlimited assets and beneficiaries. If the job is genuinely only cataloging and picking, theirs costs less. If the estate crosses $250,000 in personal property, their High Value tier starts at $3,500 and runs to $17,500,¹³ and the comparison inverts sharply.

They handle non-estate jobs. Divorce, downsizing, insurance inventory,¹¹ and even non-physical items like "vacation week dates at a family beach house."² We build for estates and divorce matters.

Their documentation is unusually candid. Their manual states outright that allocation percentages do not affect results.¹ Most companies would bury that. It is the reason this comparison could be written from their own materials rather than guesswork, and we would rather compete against a company that publishes its limits than one that hides them.

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Where Celestial Divide is better

Scope. FairSplit divides personal property. It does not touch financial accounts, real property, creditor claims, court deadlines, statutory forms or estate accounting. Their manual describes the intended use cases as estate division, divorce, downsizing and insurance inventory,¹¹ and it frames its own output as something that still has to be used "as part of a broader legal execution of a division according to your specific state laws."¹⁰ Celestial Divide covers the settlement from inventory through final distribution, including the house, the brokerage accounts, the IRAs and 401(k)s, and the deadline calendar.

Unequal shares as a first-class input, rather than a reference field.¹

Tax-aware equalization, including debt offsets, computed inside the solve rather than left to the administrator.

An adjustable fairness tolerance. You decide how much disparity is acceptable before the engine runs, instead of finding out what the disparity is after the picks are done.

Sale floors that reflect what an asset actually nets. Floors account for realtor fees, taxes and transaction costs, and proceeds from items nobody wants can be routed toward balancing the distribution.

A defensible record. Every recommendation comes with the reasoning behind it in plain language, so "why did she get the house?" has a written answer two years later rather than one reconstructed from memory.

A free tier that goes further into the process. Both products let you build an inventory for free. The difference is where the wall sits. FairSplit's free account covers the AI home inventory,¹⁴¹⁵ and every division round is a paid plan.¹² Ours covers the inventory and every beneficiary's private valuation, so the whole family can weigh in and you can see the shape of the problem before you decide whether to pay. You pay $500 when you want the solve, the allocation report and the administration tools.

One flat price regardless of estate size. FairSplit's pricing scales with heir count and item count, and personal property over $250,000 moves you to a High Value tier starting at $3,500 and running to $17,500.¹²¹³ Celestial Divide is $500 per estate with unlimited assets and beneficiaries, whether the estate is $200,000 or $5,000,000. Firms running several matters a year can use the Professional plan at $1,999 annually instead.

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Getting your inventory in without typing it twice

Data entry is the reason most people stall out. Several hundred items, and the tool is asking you to type each one.

Both products give you a way around it, and they are different ways.

FairSplit's answer is the camera, and also a spreadsheet. Their AI will name, describe, categorize and estimate value from uploaded photos.¹⁵ They also accept a spreadsheet: "You can import an existing inventory into FairSplit by adapting a spreadsheet and uploading it. FairSplit will import properties, rooms, assets and categories."⁸ The upload takes XLSX or comma-separated UTF-8 CSV, and only the Name column is required.⁸

Celestial Divide's answer is the spreadsheet. We accept a CSV or Excel inventory upload. Fill in the template, upload it once, and the inventory is built. If an appraiser, an estate sale company or a liquidator has already given you a list, and one of them usually has, that list is almost certainly already a spreadsheet. So is the schedule of assets your attorney may have started. Bulk import means that work carries over instead of being retyped.

It is not AI photo capture and we are not going to call it that. It solves a large part of the same problem, which is getting several hundred items into the system without an evening of typing, and it has the side benefit that a spreadsheet you can see and correct is easier to audit later than a set of AI guesses you have to spot-check.

The honest summary: on getting an existing list in, the two products are comparable. On starting from nothing but a house full of objects, FairSplit's photo path is ahead of us today.

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Which should you use?

Use FairSplit if: the task in front of you is building an inventory from a house full of objects and you want a camera to do it, or you need to hire a neutral administrator under a single contract.

Use Celestial Divide if: you have to actually divide the estate. Equal shares or unequal, one house of furniture or a house plus brokerage accounts plus a cabin, you want the balancing payment computed rather than negotiated, and you want a written record of the reasoning when someone asks about it two years from now.

Use both if you want their camera and our engine. Catalog in FairSplit, export the inventory, import the CSV into Celestial Divide, and run the division here. You keep the fast intake and you do not have to settle the disparity by hand. That is a legitimate workflow and we would rather tell you about it than pretend their photo capture does not exist.

Neither of us is a law firm. For a contested estate you want a probate attorney regardless.

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Next steps

• See how this works end to end. Celestial Divide for executors and families covers the whole settlement, from inventory through final distribution.
• Find out how complicated your split actually is. The estate split calculator asks a short set of questions and shows you where the friction is likely to be.
• Bring an inventory you already have. Start a free account to get the CSV or Excel import template and load several hundred items in one pass.
• See what it costs. Pricing is $500 per estate, one time, and building the inventory and collecting private beneficiary valuations is free.
• Comparing other tools? We wrote the same kind of breakdown for Celestial Divide vs. Nemu.

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Frequently asked questions

Does FairSplit handle unequal inheritance percentages?

Not in the allocation. FairSplit's own manual states that allocation percentage "is for reference only" and "is not considered in the distribution algorithms of division rounds."¹ An administrator can weight the EV credit budgets in the Emotional Value round,⁶ but the Selection Order snake draft has no weighting, so unequal shares are corrected manually after the fact by editing the distribution column.³

Does FairSplit calculate cash equalization between heirs?

It tracks the fair market value each heir receives and reports it. It does not compute the balancing payment. FairSplit's manual states that it is "up to the Administrator to review the distribution of fair market values and determine how the family will deal with disparity."³

Can FairSplit divide a house, bank accounts or retirement accounts?

No. FairSplit covers tangible personal property. Its manual does define a "property" as "a realty such as a house or condo,"⁴ but that is an organizational container: "all start with a property that contains rooms. Rooms contain assets."⁹ It is not a divisible asset in its own right. There is no process anywhere in their documentation for valuing, titling, selling or allocating the real estate itself, and none for bank or retirement accounts.

Is FairSplit good enough if our estate is an even three-way split?

It will assign the items. It will not even up the value. FairSplit's rounds never consult dollar values while allocating, and their own guidance on a three-person snake round is that "two divisees will get 3 and one will get 2,"⁷ so the piles come out uneven regardless of whether the shares are equal. Their manual leaves the disparity to the administrator to resolve.³ An even split makes the target easy to calculate. It does not calculate the balancing payment for you, and that payment is the part families argue about.

Can I import my inventory from a spreadsheet?

Both tools support this. FairSplit accepts an adapted XLSX or CSV upload and will "import properties, rooms, assets and categories," with only the Name column required.⁸ Celestial Divide accepts a CSV or Excel inventory upload that builds your inventory in one pass, which matters when an appraiser, estate sale company or attorney has already produced a list.

What does FairSplit cost?

As of August 2026, estate division plans are $350 for up to 3 divisees and 300 items, $600 for up to 5 divisees and 750 assets, and $995 for up to 12 divisees and 2,500 assets.¹² Optional administration services add $300 to $750.¹² Estates with personal property above $250,000 require a High Value plan, which runs $3,500 for $250K to $1M, $12,000 for $1M to $3M, and $17,500 for $3M to $10M.¹³

Does FairSplit have a free tier?

Yes, for inventory. FairSplit offers a free AI home inventory account,¹⁴ including a complimentary version promoted to executors,¹⁵ and you upgrade to a paid plan when you want to run division rounds.¹² Celestial Divide's free tier goes further into the process: the inventory and every beneficiary's private valuations are free, and you pay when you run the division analysis.

What does Celestial Divide cost?

$500 per estate, one time, with unlimited assets and beneficiaries and no subscription. Building the inventory and collecting private beneficiary valuations are free; you pay when you run the division. Firms handling multiple estates or divorce matters can use the Professional plan at $1,999 per year instead.

Is either one a substitute for a probate attorney?

No. Both are software, not legal services. FairSplit's manual states it "is not a legally binding service on its own, but it can be used to create a legally binding distribution or division."¹⁰ Celestial Divide is estate settlement software, not a law firm. For a contested estate or a genuine legal question, hire a probate attorney. Good software makes that engagement cheaper because you arrive organized.

What is envy-free division?

An allocation is envy-free when no participant would rather have another participant's share than their own, judged by their own valuations. It is a stronger standard than simply receiving your entitled percentage. With indivisible items like a house or a coin collection, envy-freeness usually requires cash transfers to close the gaps, which is why an equalization calculation is not optional if fairness is the goal.

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Sources

All FairSplit information in this article is drawn from FairSplit's own published materials. Every page below was retrieved on 2026-08-25. Product details change; verify current pricing and features with each vendor before deciding.

The complete FairSplit user manual is also published as a PDF at https://manual.fairsplit.com/fairsplit-manual.pdf.