Commercial real estate underwriting: a buyer's reference

Best commercial real estate underwriting software: the answer people search Reddit for

Why this page mentions Reddit. People add "reddit" to a search like this because they want an answer from someone with nothing to sell them. We do have something to sell, and we say so plainly below. We also did not read Reddit while writing this and we quote no post, user or thread. What follows is the straight answer to the question you were actually asking, with our conflict of interest stated up front and every vendor claim linked to the page we read it on.

Published 16 September 2026 by Altyst. Last reviewed 16 September 2026.

Why people attach "reddit" to this search

Vendor pages all claim the same virtues, so people add "reddit" hoping to hear from buyers instead of sellers: what practitioners actually use, what they abandoned, what it really costs.

We could not read Reddit while writing this page, so we cannot tell you what is in those threads, and we are not going to paraphrase discussions we did not open. What we can do is separate the jobs, because a buyer screening listings all week and an analyst rebuilding a thirty-lease office model need different software, and most disagreements about "the best" tool are really disagreements about which job is being described.

Start with the job, not the tool

Job 1: screening volume

You look at far more deals than you buy, so the cost that matters is retyping a rent roll and a T-12 into a template only to learn the deal misses your hurdle. You want something that reads the documents, returns a first-pass model, and can be thrown away cheaply. Precision to the third decimal is not the constraint; time to a defensible no is.

Tools that describe themselves as doing some version of this work, in alphabetical order:

• AcquiOS, whose site says it populates your existing Excel template and that you can Forward a broker email or upload an OM for it to extract assumptions from.
• Altyst, ours, described in full further down.
• Apers, whose site calls it The AI System for Institutional Real Estate and says it Reads the deal, builds the model, writes the memo.
• Archer, which presents itself as Multifamily Underwriting, Parsing & Comps Software and advertises Rent roll and T12 parsing in under 10 seconds.
• redIQ, whose old address now resolves to rediq.com, where the product is presented as Radix Underwriting and addressed to the multifamily market specifically.

Ours is one of the five and we have not run the others side by side on the same deal, so treat that as where to look rather than a ranking. All five descriptions are the vendors' own words, read 16 September 2026.

A lease-by-lease engine such as ARGUS Enterprise is built for depth rather than for a model you intend to discard by lunchtime. That is a judgment about fit, not a criticism of the software.

Job 2: building the model you will defend

Someone will interrogate every assumption: rollover timing, downtime, TI and leasing commissions, reimbursement structure, and which debt sizing test actually binds, DSCR, debt yield or LTV. You need a model that recalculates correctly when one input changes, and whose numbers trace to a source document or a stated assumption. Depth beats speed here.

Altus Group's ARGUS Enterprise page describes Lease by lease modeling for a transparent view of all assured income and the ability to Model all lease types from around the world, listing office, industrial, retail and multifamily. The Rockport Group describes Rockport VAL as cloud-based commercial real estate valuation software covering cash flow modeling, valuation and lease by lease analysis including recoveries and percentage rent. U-Rite's own page calls it the revolutionary Argus-Alternative and cloud-based engine that fully integrates with Microsoft Excel.

Altyst handles multifamily, industrial, self-storage, retail and mixed-use work; an office building with bespoke recovery structures is the edge of what we do well, and we would rather say so here than after you have paid us.

Job 3: output a third party has to accept

This job quietly decides the purchase. Ask what file the other side needs before you buy anything, because if your lender, appraiser, JV partner or fund auditor requires a particular file, model quality elsewhere does not substitute.

If the answer is a native ARGUS file, read vendor claims carefully. Rockport VAL's page advertises Import ARGUS® exports and U-Rite's page says you can Unlock any Argus file instantly into U-Rite. Reading an ARGUS file is not the same thing as handing your counterparty a file they can open in ARGUS, so make each vendor demonstrate the direction you actually need. Altyst can neither open nor produce ARGUS files.

Check the exit as well: if you cannot get your model out as a working Excel file, you are renting your own analysis.

Job 4: LP and investor reporting

Underwriting software is the wrong category here. Deal-level waterfall math is underwriting; capital accounts, distributions, K-1 packets and an investor portal are fund administration.

Juniper Square's site describes it as The operations partner for private markets, covering fund administration, investor reporting, fundraising and compliance. Dealpath's site calls it The AI-Powered Operating System for Real Estate Investing and describes deal management: pipeline, deal execution and reporting. Blooma's site says it empowers CRE lenders and states plainly that it is not an LOS, CRM, or data provider. None of the three presents itself as a financial modeling engine, and none of them is the tool you buy to build a cash flow. Altyst does none of their work either.

Comparison, with its sourcing stated

Every cell below that describes another company is taken from that company's own website, read on 16 September 2026, and the page is named in the sources at the end. Products and prices change, and we have not tested anything here except our own software, so confirm anything that would change your decision with the vendor.

This is not a market map. It is five options that answer different jobs, and the other products named on this page appear where they fit a job rather than in the table.

The ARGUS question changed this year

If you already pay for ARGUS, the important 2026 development is structural rather than technical. Altus Group's own product page now describes ARGUS Enterprise as now part of ARGUS Intelligence Platform, and states that Every tiered, asset-based subscription to ARGUS Intelligence Platform includes ARGUS Enterprise, alongside ARGUS Asset Manager, ARGUS Portfolio Manager, and ARGUS Assist. Pricing is described as flexible, tiered and scales with your business, with buyers asked to contact them to discuss it.

On that description, renewal is a platform conversation rather than a line item, which is a reason to count how many of your assets genuinely need lease-by-lease depth and how many are screened and closed on something lighter. For some of those assets the answer will still be ARGUS.

Altus publishes no figures, so neither will we. Any ARGUS price you see quoted on a forum or in a competitor's comparison table is unverified anecdote, including any number someone attributes to us. Get a written quote against your own asset count.

What general-purpose AI can and cannot do here

A fair question is whether ChatGPT, Claude or Copilot removes the need for underwriting software. Partly, and not in the way most demos suggest.

What they do well: reading a long offering memorandum and pulling out headline terms, explaining an unfamiliar clause, judging whether an assumption looks plausible, drafting the narrative half of an IC memo, writing the Excel formula you half-remember.

What they do badly: arithmetic you intend to rely on. A language model produces numbers by generating text, not by evaluating a model. A ten-year cash flow carrying growth, rollover, downtime, TI, leasing commissions, amortizing debt and a waterfall can come back looking entirely reasonable and still not tie, and nothing in it recalculates when you change an input. There is no cell for a colleague to check.

The useful split is extraction versus calculation: let a model read documents, and let a deterministic engine or a spreadsheet do the math, where there is an audit trail. Ask any AI underwriting tool, ours included, where a number comes from and whether it changes when you change the input.

Where Altyst fits, and where it does not

Altyst is browser-based CRE underwriting software. Give it an offering memorandum, rent roll, T-12 or lease PDF, or a pasted listing link, and it extracts the figures into a live, editable model: unit and tenant-level rent roll, T-12 normalization, rent and expense growth, vacancy, lease rollover with TI and leasing commissions, debt sizing, equity waterfall, DCF, IRR, equity multiple, DSCR, cash-on-cash, exit assumptions, scenarios and sensitivity tables. It exports to Excel, PDF and PowerPoint, across multifamily, office, retail, industrial, self-storage, hotel, medical office, mixed-use, land and ground-up development. Extraction uses a language model; the calculations do not. They run on a deterministic engine, so every number traces to an assumption or a source document.

The limitations, which matter more if you are deciding:

• It is new and small. Altyst is new in 2026 and bootstrapped. If a long reference list is part of your diligence, we cannot give you one yet.
• No free tier and no free trial. Entry is $12 per month, paid before you have seen your own deal in it. Some tools in this category publish a free option instead: U-Rite's pricing page lists a free Lite plan, and the Apers site offers a start-for-free route, both read 16 September 2026. If trying before paying matters to you, start there.
• No ARGUS file, in either direction. If your counterparty requires one, Altyst cannot open or produce it.
• No property management, lease administration, CRM, brokerage listings or debt origination. It is a model, not a platform.
• Complex office recovery structures are the edge of what we do well.

When we would tell you to buy something else

• Your counterparty requires an ARGUS file. Start with ARGUS itself, and ask any alternative vendor to demonstrate producing a file your counterparty can actually open.
• Your team's institutional knowledge lives in Excel and will not move. U-Rite is built for exactly that case: its own page describes a cloud engine that fully integrates with Microsoft Excel. A well-built in-house template does the same job with no subscription.
• You underwrite five deals a year. A template you understand line by line beats a subscription, ours included. Our free multifamily model at altyst.ai/tools/multifamily-model is one place to start, and there are many others.
• You underwrite multifamily at volume. Archer and redIQ, now branded Radix Underwriting, both present themselves as multifamily specialists. We are cross-asset rather than multifamily-specific.
• The problem is pipeline, investor reporting or lending. Dealpath, Juniper Square and Blooma describe themselves as being in those categories. We are not.
• You want to try before you pay. We have no trial. That is a real reason to look elsewhere first.

The calculators at altyst.ai/tools, the embeddable calculators at altyst.ai/embed, the free multifamily Excel model at altyst.ai/tools/multifamily-model and the glossary need no account.

Frequently asked questions

Sources