Full identification
Country, year, denomination & catalog no.
Every scan returns the issuing country, year of issue, face value and the Stanley Gibbons (SG) catalog number — the details collectors actually look up.
Stamp identification & valuation
What's your stamp worth? Find out in seconds.
Point your camera at any postage stamp and Stampo identifies its country, year, denomination and catalog number — then gives you an estimated value and rarity, from a single photo.
Works from one photo · No expertise needed
Each scan returns
- Country
- Year
- Denomination
- SG catalog no.
- Estimated value
How it works
From photo to value in three steps
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Snap a photo
Point your camera at any stamp and crop to the one you want. No catalog, no typing, no expertise needed.
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See what it is — and what it's worth
One screen names the country, year, denomination and catalog number, then shows an estimated value range and how rare the stamp is.
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Build your collection
Every stamp you identify is saved with its estimated value, so your finds build into a personal catalog you can scroll back through any time.
What Stampo reveals
Everything a catalog tells you — from one photo
Each scan reads like a collector's catalog entry: what the stamp is, what it might be worth, and how rare it really is.
Estimated value
A value range, not a wild guess
See a realistic low–high estimate grounded in catalog listings and recorded sales. Stampo shows a range because that's how the market really prices a stamp.
Rarity
From common to extremely rare
Know whether a stamp was printed in the millions or survives in a handful of copies, so you can tell the everyday from the genuinely scarce.
Match confidence
How sure the identification is
Each result carries a match-confidence score, so you can see at a glance how closely your photo fits the identified stamp.
Quick facts
The catalog details, summarized
Denomination, catalog number, condition and theme are laid out as quick facts — the at-a-glance card you'd otherwise piece together by hand.
Scan history
Your collection, in one place
Every stamp you identify is saved with its estimated value, so your finds build into a personal catalog you can scroll back through any time.
Famous stamps
From the Penny Black to the one in your hand
The stamps that made philately legendary — and a sense of the range a single small square of paper can be worth.
Great Britain · 1840
Penny Black
The world's first adhesive postage stamp — printed in its millions, so used examples are affordable; the big money is in mint stamps, scarce plates and covers.
View Penny Black value guide
United States · 1918
Inverted Jenny
A 24-cent airmail stamp printed with the Curtiss JN-4 biplane upside down — a single sheet of 100 escaped, making it the most famous error in U.S. philately.
View Inverted Jenny value guide
Mauritius (British colony) · 1847
Blue Mauritius
The 1847 'Post Office' issues — among the first stamps outside Britain, with only ~26-27 known, and among the most coveted stamps in the world.
View Blue Mauritius value guideAn honest note
About those values — the honest version
Every value in Stampo is an estimated range, not a single price. It's built from catalog references and recorded sale data to show roughly what a stamp trades for.
Condition is everything in philately. Centering, perforations, gum, cancellation and damage can move a stamp's worth dramatically — two copies of the same issue can be worlds apart.
Stampo is a guide, not a professional appraisal. For insurance, sale or a high-value stamp, have it examined by a qualified philatelic expert.
Pricing
Start free, upgrade when it pays off
Best value
Annual Subscription
USD14.99/year
Good to know
Questions, answered honestly
How accurate is it?
Stampo matches your photo against a wide reference of postage stamps and returns its best identification with a confidence score. It's a fast, well-informed first read — strongest on well-documented issues — not the final word. For a high-value stamp, treat the result as a starting point and confirm with a specialist.
Does it work offline?
Identifying a stamp compares your photo against an up-to-date reference, so Stampo needs an internet connection to scan. Stamps you've already identified stay saved in your scan history to browse any time.
Can it tell me what my stamp is worth?
It gives an estimated value range, not a single price. Stamp values depend heavily on condition, centering, gum and demand, so Stampo shows a low–high range based on catalog references and comparable sales rather than pretending to know an exact figure.
Which stamps does it cover?
Stampo focuses on classic and collectible postage stamps — the issues collectors look up most, from the Penny Black onward, across many countries and eras. Coverage is broad and keeps growing; very obscure local issues may not be recognised yet.
Is it free to try?
Yes — you can download Stampo and try identifying a stamp for free. A subscription unlocks unlimited scans and the full collection features.
Identify your first stamp in seconds
Download Stampo, point your camera, and find out what that stamp really is — and what it might be worth.