Gumyum AI
One platform, three sides — connecting 5M homeowners, 10,000 tax consultants, and tax lenders through AI valuation intelligence.
Satish Mandalika | Founder & CEO | info@appealsbuddy.com
Problem
Homeowners overpay — silently
<1% of owners appeal each year, yet >50% are over-assessed. $4.2B in recoverable overpayments go unfiled annually in Texas alone.
Tax consultants have zero technology
10,000 licensed firms run leads in spreadsheets and file through archaic county portals. They spend $5K–$50K/year on direct mail just to find clients.
Lenders are stuck
$2B+/year in property tax loans are originated with no way to reduce the underlying bill — so borrowers stay over-taxed and at higher risk.
254 county appraisal districts
Each with different data, portals, and rules. No statewide standard — and no purpose-built software connecting any of the three sides.
Solution
Gumyum AI sits in the center of all three sides — and earns on every transaction.
Why Now?
Three forces converging:
🏠 Homeowner anger peaking
2026 TX assessments up 10–20%; appeals are surging.
🔓 County systems opening up
True Prodigy's first open APIs make integration possible — it wasn't 3 years ago.
🤖 AI inflection
LLM agents can now do hearing prep and case strategy at consultant quality.
⚡ Replicability proven
Illinois launched in 2 weeks via our automated LangGraph pipeline.
Market Size
$600B
Total Addressable Market
U.S. property tax economy collected every year.
$200B
Serviceable Addressable Market
Top 10 states addressable by purpose-built software.
$200M
Serviceable Obtainable Market
Realistic 5-year revenue capture across our verticals.
$4.2B
Recoverable in Texas
Recoverable overpayments every single year — unfiled.
Commercial: the same engine, 30× the ticket
One commercial building appeal earns more than 30 residential ones — on the same platform, ML pipeline, and data.
= 14–42× fewer cases for the same revenue.
Cook County proves the demand
$3.3B
business tax cut by commercial appeals (2021–23, Cook County Treasurer)
64%
of businesses appeal — vs only 27% of homeowners
$2B
of burden the appeal system shifted from commercial onto homeowners
How we win commercial
A different valuation method, a cheaper model, and one clear incumbent to beat.
vs O'Connor — the 50-year incumbent
Our edge: 40% lower fees + instant analysis + we surface over-assessed buildings proactively.
Commercial revenue ramp (on top of residential)
$375K
Y1 · 50 cases
$1.5M
Y2 · 200 cases
$3.75M
Y3 · 500 cases
Pilot: 5–10 buildings, Q3 2026.
Competition
Everyone else picks one side. Gumyum is the connective infrastructure for all three — the platform, not the app.
Ownwell ($21M raised)
Consumer protest service — app layer only. No data infrastructure, no PTC platform.
Mainstay ($35M, Khosla)
Institutional SFR only. Won't serve homeowners or small landlords — complementary, not competing.
Tax Ease / Propel
Property tax loans only — can't reduce the underlying bill. A distribution partner, not a competitor.
Spreadsheets (90% of PTCs)
The real competitor: inertia. Manual lead tracking with no workflow lock-in and no AI.
Product
One integrated workflow for tax consultants — live today with Vanguard Tax Appeals:
A closed-loop AI system that gets smarter with every case filed and every outcome recorded.
Development Roadmap
1
Q3 2026
PTC Portal MVP · 10 PTCs · IL live
2
Q4 2026
First lender API · Florida launch
3
Q1 2027
100 PTCs on platform
4
Q2 2027
$1–3M ARR
Business Model
Three revenue layers — we touch every dollar of savings that flows through the system.
Now
💰 Transaction Fees
- PTC contingency split $150–300/protest
- SaaS $100–500/mo
- Lead fee $5–20
- Lender audit $50–200/loan
Year 2+
📊 Data Products
- Valuation API for fintech & insurance
- Appeals intelligence for investors
- Homestead compliance SaaS
Year 2+
🏪 Marketplace
- Batch protests by ZIP
- Reverse auction drives fees 33% → 15%
- Platform fee on every match
Founding Team
Satish Mandalika
Founder & CEO
- MBA — UC Berkeley Haas
- Founded & exited Drishyam AI — acquired by Mediaocean in a 7-figure deal
- Led AI across enterprise adtech platform as VP of AI Technologies
Horacio Zambrano
Co-Founder
- BS Computer Engineering & MBA — Stanford
- Serial entrepreneur and former Wall Street executive
Raghu Vatsavayi
Co-Founder
- MS — IIT Bombay, specializing in distributed computing
- Serial entrepreneur; founding engineer at a startup acquired by Microsoft
Strategic Partners & Advisors
Vanguard Tax Appeals
First PTC partner — live on the portal today.
Mainstay
AVA tool distribution talks underway (50–65% probability).
True Prodigy
County data API integration — the infrastructure backbone.
Tax Ease / Propel
Lender integration partners — distribution, not competition.
Financials & Cap Table
Raising
$1M – $2M on a Pre-Seed / Seed round.
Cap Table
Founder-owned and clean — pre-institutional, no prior dilution.
Runway & Path
~18 months to 100 PTCs and Series A readiness (Q3 2027).
Fundraising (The Deal)
Raising $1M – $2M on a Pre-Seed / Seed round
What this round funds
01
PTC Portal MVP live with 10 PTCs
Q3 2026
02
First lender API integration
Q4 2026
03
Florida expansion launched
Q4 2026
04
100 PTCs on the platform
Q1 2027
05
$1–3M ARR, Series A ready
Q2–Q3 2027
Satish Mandalika · info@appealsbuddy.com · +1-925-640-2124 · appealsbuddy.com
INVESTOR UPDATE · JUNE 2026
Progress since February 2026
4.3M
properties analyzed
56,733
Platinum appeal leads
$91M
annual savings identified
2 wks
to launch a new state
2,000+
homeowner signups
50,000+
video views
13
counties with data
10
channel partners ready
Texas $85B + Illinois $35B — now in 2 of the top 3 U.S. property-tax states
INVESTOR UPDATE · JUNE 2026
From a Texas prototype to a multi-state platform
Expansion is repeatable
Illinois went live in 2 weeks via our 9-chain LangGraph pipeline — and produced 6x more Platinum leads than Texas.
The ML generalizes
The same Signal A/B/C scoring hit 1.5x lift in Illinois despite a completely different tax system (10% vs 100% assessment, triennial vs annual).
A funded competitor validated us
Mainstay (Khosla, $35M) confirmed it won't compete in our segment and proposed distributing through our portal — partnership 50–65%.
Appendix
WHAT WE'VE BUILT
Two states, one engine
TEXAS
Live since February
- 3.2M properties analyzed · 7 counties
- 8,300+ Platinum (triple-signal) leads
- Vanguard Tax Appeals — PTC partner live
- 2,000+ homeowner signups · 50,000+ video views
- Valuation Engine V4 — 4 iterations in 6 weeks
ILLINOIS
New — launched May 2026
- 1.06M Cook County properties analyzed
- 48,433 Platinum leads — 6× more than Texas
- $81.2M in annual savings identified
- 1.50× backtest lift (17.8% vs 11.85% win rate)
- Zero → full pipeline in 2 weeks (automated)
WHAT CHANGED
Four things we proved
Expansion is repeatable
Illinois went live in 2 weeks — not 6 months — via our 12-chain LangGraph pipeline, and produced 6× more Platinum leads than Texas.
The ML generalizes
The same Signal A/B/C scoring hit 1.50× lift in Illinois despite an opposite tax system (10% vs 100% assessment, triennial vs annual, 2.87 equalization factor).
We found the funnel fix
50,000+ views and 2,000+ signups exposed one bottleneck: an address-first homepage (show savings before signup) should lift conversion 3–5×. A UX fix, not a product problem.
A B2B channel engine
Potential for a Market of 1,248 partner leads across 8 categories (property managers, HOAs, attorneys, condo boards) — 730 with emails. Cold outreach launching now.
THE OPPORTUNITY, UPDATED
Now in 2 of the top 3 property-tax states
$2.7M
annual revenue at just 10% capture of Platinum leads — from contingency fees alone, before SaaS, data products, or lender integrations.
The Platinum leads alone represent $91M in annual savings. Add commercial, Florida, and New Jersey and the addressable market reaches ~$200B.
WHAT'S NEXT
June → September 2026
June — immediate
- Launch IL cold email to 40 channel partners
- Ship address-first homepage (3–5× conversion)
- File first Cook County appeals via attorneys
- Begin commercial scoring (Class 5A/5B)
Q3 2026
- Onboard 10–20 PTCs / attorneys to the portal
- Reactivate Texas campaigns
- Pilot 5–10 commercial buildings ($50K+ each)
- Start Florida pipeline · batch-marketplace prototype
Q4 2026
- Florida + New Jersey (commercial from day one)
- Lender integration pilot (pre-loan audit API)
- Commercial channel outreach (BOMA, CRE brokers)
- Target: $1M ARR run rate
