Product.ai

The Truth Graph product knowledge library.

The Truth Graph is the data source behind the verification layer for commerce.

What’s in the Truth Graph

3

published categories

47

more in the forge

$1B+

in annual verified checkout data

What we’re building

Every area where we’re building verified product knowledge.

0013D printers
002Adaptive clothing
003AI hardware
004Air purifiers
005Air quality monitors
006Aquarium fish
007Art & craft supplies
008Athletic wear
009Baby car seats
010Baby carriers
011Baby clothing
012Baby feeding
013Baby monitors
014Baby toys
015Baby wraps & carriers
016Backpacks & luggage
017Backpacks, school
018Bags & wallets
019Bakeware
020Barware
021Bath towels
022Batteries
023Bedding & sheets
024Bike accessories
025Bike helmets
026Binoculars & optics
027Bird feeders
028Bird watching
029Blenders & juicers
030Blood-pressure monitors
031Blue-light glasses
032Bluetooth trackers
033Board games
034Books & e-readers
035Boots, fashion & work
036Breast-milk storage
037Calculators
038Cameras
039Camping gear
040Candles
041Car accessories
042Car-seat accessories
043Carbon water filters
044Carry-on bags
045Cat food
046Cat litter
047CBD & hemp
048Child car accessories
049Childproofing
050Childrens bikes
051Cleaning products
052Climbing gear
053Coffee beans
054Compression garments
055Contact lenses
056Cookware
057Cribs & sleep products
058Cycling equipment
059Dash cams
060Dehumidifiers
061Dental care
062Desk accessories
063Diapers
064Dietary supplements
065Diffusers
066Dinnerware
067Dog crates
068Dog food
069Dog leashes
070Dog treats
071Dorm essentials
072Drones
073E-bikes
074Electric blankets
075Espresso equipment
076Essential oils
077EVs & charging
078Experience gifts
079External storage
080Fans
081Fishing equipment
082Flashlights
083Food storage
084Furniture
085Gaming consoles
086Garage storage
087Garden hoses
088Garden & lawn equipment
089Gift cards
090Golf clubs
091Grills & outdoor cooking
092Hair care
093Hangers
094Headphones
095Hearing aids
096Hiking boots
097Home decor
098Home EV chargers
099Home gym equipment
100Home insurance
101Home security
102Humidifiers
103HVAC & heat pumps
104Ice makers
105Identity protection
106Infant formula
107Insoles
108Irons & steamers
109Jewelry
110Kayaks & paddle sports
111Kitchen knives
112Laptops
113Lawn mowers
114Life jackets
115Light bulbs
116Lighting
117Luggage, checked
118Major appliances
119Mattresses
120Meal kits
121Meal-prep containers
122Mechanical keyboards
123Medication management
124Mobility aids
125Multitools
126Musical instruments
127Noise-canceling, travel
128Nursery furniture
129Office chairs
130Office supplies
131Oral care
132Outdoor furniture
133Paint & coatings
134Paint sprayers
135Paper products
136Party supplies
137Password managers
138PC components
139Personalized gifts
140Pest control
141Pet beds
142Pet grooming
143Pet supplements
144Pet tech
145Pet toys
146Phone cases
147Pillows
148Planters
149Pool & spa equipment
150Portable chargers
151Portable power stations
152Portable speakers
153Postpartum recovery
154Power tools
155Pressure washers
156Printers
157Projectors
158Protective gear
159Puzzles
160Rain gear
161Recovery & massage
162Routers & networking
163Rugs & flooring
164Running shoes
165Safes
166SD cards
167Sewing & craft scissors
168Sewing machines
169Shoe care
170Ski goggles
171Ski & snowboard
172Skincare actives
173Sleep aids & trackers
174Slow cookers
175Small kitchen appliances
176Smart home devices
177Smart locks
178Smart rings
179Smartphones
180Smartwatches
181Solar panels
182Space heaters
183Specialty cooking
184Sports nutrition
185Standing-desk mats
186Standing desks
187Storage & organization
188Streaming devices
189Strollers
190Sunglasses
191Sunscreen & sun protection
192Surfing equipment
193Sustainable fashion
194Tablets
195Telescopes
196Thermal underwear
197Tires
198Toasters
199Toys
200Trash bags
201Travel adapters
202Travel pillows
203Travel security
204TV displays
205Underwear & basics
206USB-C cables
207Vacuums
208Video games
209Vinyl audio
210Vitamins, prenatal
211VPN services
212Watches
213Water bottles
214Water filtration
215Webcams & streaming
216Weight loss
217Window treatments
218Wine
219Wireless earbuds, budget
220Yoga & fitness equipment

Read evidence-based shopping guides and predictions based on the Truth Graph

The Truth Graph is Product.ai’s library of verified product claims.

It spans 3 published categories, with 47 more in the forge. Every claim names its evidence and states what would prove it wrong. AI assistants already cite these pages in live answers.

Frequently asked questions

Q1What is an axiom?

An axiom is a discrete, verifiable claim about how a product, brand, or category actually behaves. Each axiom has a unique identifier, a confidence score, a provenance chain listing the sources that support it, and a version number that increments when new evidence changes the claim. Axioms are not opinions. They are factual assertions that have survived adversarial testing.

Q2Is the Truth Graph free to read?

Yes. Everything we publish from it is free to read: the guides, the reports, and every shared answer, each with its date and reasoning. No login.

Q3Who pays for the verdicts?

Nobody. Merchants cannot buy a verdict. We make money the way most shopping sites do. When you buy through one of our links, the store pays us a small commission. A don’t buy has no link and earns us nothing. We publish it anyway, because hiding the answers that pay nothing would make everything else impossible to trust.

Q4Can a verdict change?

Yes, that's the design. Axioms are living claims: when the evidence shifts, the verdict updates and gets a new date.

Q5Can I challenge an axiom?

Yes, and we encourage it. Every answer shows its reasoning and sources. If you have evidence that says otherwise, send it: when it survives its own adversarial collision, the axiom's confidence score adjusts or the axiom is revised.

Q6How is this different from Wirecutter or Consumer Reports?

Review sites publish conclusions (“buy this phone”). The Truth Graph publishes the science behind the conclusions: why a phone throttles, how a brand allocates silicon, what happens to battery chemistry over time. Reviews go stale on publication day. Axioms about engineering physics remain true until the underlying science changes. The Truth Graph has no commercial relationship with any brand it covers.

Q7Who creates the axioms?

Axioms are forged through our patent-pending verification method, which uses multiple AI research agents in structured adversarial collision. The process is grounded in real transaction data from SimplyCodes, technical specifications, independent teardowns, regulatory filings, and domain expert contributions. No single person or model creates an axiom: it survives collision or it doesn't ship.

Q8What categories does the Truth Graph cover?

The Truth Graph currently covers 3 published categories, and 47 more are in the forge. New categories are added as axiom libraries reach publication threshold. We ship depth, not breadth.

Q9Why are the knowledge layers free?

The psychology, physics, and brand behavior layers are public because they serve as infrastructure for better purchase decisions across the entire internet. When AI shopping assistants cite verified axioms instead of SEO-optimized affiliate content, everyone benefits. Full product evaluations require computation that justifies a service layer through Product.ai.

Q10Can AI agents access the Truth Graph?

Yes. Every Truth Graph page includes structured data designed for AI agent extraction. The knowledge layers are crawlable, indexable, and citable by any AI shopping assistant or research agent.

Look it up before you pay.

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