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Show HN: OfferGridAI – side-by-side comparison of real estate offers from PDFs

https://offergridai.com
14•beechwood•2h ago

Comments

beechwood•2h ago
Hello HN, I’m a solo developer building tools for real estate workflows. I built OfferGridAI after watching listing agents repeatedly struggle with the same problem during hot markets.

When a property gets multiple offers, each offer usually comes in as a 10–20 page PDF. Under tight time pressure, agents have to manually dig through each document and rebuild a spreadsheet to compare things like price, net to seller, contingencies, financing, closing timeline, escalation clauses, etc. It’s not conceptually hard, but it’s stressful, time-consuming, and easy to miss details buried deep in the PDFs.

I wanted a way to make that moment less chaotic.

The idea: Upload multiple offer PDFs → extract the key terms → generate a clean, side-by-side comparison grid that’s easy to walk through with a seller.

Instead of just dumping text, the tool normalizes the information into comparable fields (price vs net, contingencies, financing strength, days to close) and adds a short summary highlighting tradeoffs (e.g. highest price vs highest certainty to close).

What it focuses on:

Structured extraction of common purchase-agreement terms

Normalizing offers so sellers can compare apples to apples

Surfacing risk factors (financing type, contingencies, timeline)

Producing a seller-ready grid rather than raw AI output

What it intentionally does not do:

Make decisions for agents or sellers

Replace professional judgment

Integrate with MLS or transaction management systems (at least for now)

The goal is to be a fast decision-support tool for a very specific, high-pressure moment.

I’m early and still refining the scope, especially around:

Which fields matter most in practice

How to communicate “risk” without over-claiming

How tolerant users are of “best effort” extraction vs perfection

I’d love feedback from anyone who’s worked with complex PDFs, document comparison, or decision-support tools under time pressure, or from anyone who’s built vertical SaaS in heavily regulated industries.

Happy to answer questions and learn from the community.

jgalt212•1h ago
> each offer usually comes in as a 10–20 page PDF.

When sold out vacation home, we had multiple offers, but I seem to recall the offer letters being 1 pagers. Does offer letter length vary by region?

beechwood•1h ago
Yes, I think it varies by state.
SkyPuncher•1h ago
Both houses we’ve bought have essentially been 1 pagers for the core details.

The rest of the document has been a semi-standard contract (used by the real estate agent associations).

simonw•1h ago
For covering the risk of mistakes I suggest considering ways of "visually quoting" the documents.

If the summary says "closing timeline: X" but there's an icon I can click that pops open an overlay with a visual cropped screenshot of that part of the original PDF - maybe even with a red circle around that detail - I can trust those summaries a whole lot more.

Gemini 2.5 has image bounding box and masking features that can help with this (sadly missing from Gemini 3.)

beechwood•1h ago
Ok, gotcha. I think this is doable. Show the excerpt from the original document so the user has confidence the data is correct.

Thank you for the feedback.

lysecret•1h ago
Oh I didn’t know about the visual bounding boxes this is super cool!

Quick question are you talking about this feature?

https://docs.cloud.google.com/vertex-ai/generative-ai/docs/b...

Because it’s just using structured response so it should be doable with Gemini 3 ? (We are using Gemini 3 for some docs processing and its visual understanding is just incredible)

simonw•23m ago
No I'm talking about the image segmentation feature: https://simonwillison.net/2025/Apr/18/gemini-image-segmentat...

But the bounding box stuff might work well enough in Gemini 3 to handle this case as well.

gavinray•50m ago
Tangential question:

I've never owned a home and would like to try to buy one in the next year or two. There doesn't seem to be much in the way of API's/software tools that let you analyze historical data and prices of listings in specific areas.

How can I get my hands on the right information to make sure I don't get ripped off?

beechwood•44m ago
Not sure, maybe check on reddit in one of the real estate subs.
867-5309•1h ago
title should indicate American market
beechwood•1h ago
My apologies, yes this is for the American market.
kassas•1h ago
how many paying customers do you have?
beechwood•1h ago
I just built this yesterday, so 0. Want to be my first?
TechTechTech•55m ago
I assume this means the reviews under "Trusted by Listing Agents" are AI generated as well?
beechwood•50m ago
No, I had a couple of agents give it a spin. I am letting them use it for free in exchange for feedback.
ImPostingOnHN•25m ago
> I assume this means the reviews under "Trusted by Listing Agents" are AI generated as well?

There's a question mark here, but this is not a question, it's an uncharitable statement. You know what happens when you assume.

Try something like "if you have no paying customers, how do you have reviews?" Even asking the question helps you think about the perceived conundrum, because your next thought might be "are paying customers necessary for reviews?" (no), which would probably lead you to solve your mystery yourself.

pietz•16m ago
2006: "This meeting could have been an e-mail"

2026: "This app could have been a prompt"

beechwood•9m ago
c'mon

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