category.seed_backup.label

category.seed_backup.promise

Starting path

The products that failed the fire test are the ones quoting a temperature.

Seed phrase backups evaluated on whether someone neutral actually destroyed one, where the fire number comes from, whether you can still read it afterwards, and the price you can see before checkout.

category.seed_backup.promise Reviewed on whether someone neutral actually destroyed one, where the fire number comes from, whether you can still read it afterwards, and the price you can see before checkout.

Start with the smart category assistant or jump straight into quick questions. Both paths narrow to the same recommendation standard.

How we review

Recommendation first, comparison only if needed.

Reviewed and rechecked on the current cycle.

Commercial relationships disclosed before clickout.

Audit

Infrastructure

Methodology

2026.04.0

published 2026-04-27

Providers tracked

650+

across 72 categories

Last verified

2026-08-06

editorial freshness

Editorial board

4

audit-log live

Decision guide

What matters most before choosing in this category

Buy the tested one, not the rated one. This is a rare category where the marketing claim is physically testable, and an independent tester has been destroying these products for years — so a published temperature is worth far less than a grade from someone who put the thing in a furnace. The split is uncomfortable and consistent: the products that failed are the ones quoting a number, because that number is their alloy's melting point, which is a property of stainless steel rather than a result for the product. The two that publish no rating at all take straight A grades, and one of those is the cheapest thing here. After that, ask whether you could still read the phrase after the damage — surviving intact and staying legible are different tests — and only then compare price.

Key question

Has a neutral third party actually destroyed this product, and what grade did it get?

Key question

Is the quoted temperature a test result, or just the melting point of the metal?

Key question

If it survives a fire, can the phrase still be read out of it?

Current editor lead

BitBox Steelwallet

Two engraved stainless sheets, 12 words each, marked with an included automatic punch.

Data checked Aug 2026

Two engraved stainless sheets, 12 words each, marked with an included automatic punch. Strongest on whether the real landed price is on the page (10/10): The shop page states the unit price, the discount, the exact tax rate and free shipping in one view: "Steelwallet € 65.00 € 58.50", "including 19.00% VAT", "Kostenloser Versand direkt aus unserem deutschen Lager!", and confirms the box is complete - "In the box", "Engraved stainless steel sheets (2 pcs)", "Automatic… Weakest on what you can store, and whether you can read it back afterwards (6/10): "Steelwallet supports the BIP-39 standard which allows you to store 12,18 and 24 word seeds" and "That's why you only need (and only can) punch the first 4 letters of word of your seed onto your Steelwallet". The vendor's own parenthesis - 'and only can' - is the limit: the plate physically cannot record a full word… Published price: "Steelwallet € 65.00 € 58.50" with "including 19.00% VAT", under the site-wide banner "Kostenloser Versand direkt aus unserem deutschen Lager!" (fetched 2026-08-06). Normalised to one unit on 2026-08-06: € 58.50 delivered, tax included, with nothing further…

Best for

Whether the real landed price is on the page — 10/10Where the fire number comes from — 9/10Whether someone neutral actually destroyed one — 8/10

Main tradeoff

The A grade is from May 2019 - seven years old - and Shift Crypto quotes that review on the product page as current evidence. Nobody neutral has destroyed a Steelwallet bought from shop.bitbox.swiss. Note also that the free-shipping promise is written in German and describes dispatch from a German warehouse, so buyers outside that lane should not assume it applies to them; the page states no shipping figure for anyone it does not.

Verify before signup

"Steelwallet € 65.00 € 58.50" with "including 19.00% VAT", under the site-wide banner "Kostenloser Versand direkt aus unserem deutschen Lager!" (fetched 2026-08-06). Normalised to one unit on 2026-08-06: € 58.50 delivered, tax included, with nothing further to buy - the page's own "In the box" list includes the punch. The page's structured data carries schema.org/InStock.

Weighted criteria

Whether someone neutral actually destroyed one35%

Where the fire number comes from24%

What you can store, and whether you can read it back afterwards23%

Whether the real landed price is on the page18%

Leading options

Shared shortlist for this category

These providers are pulled from the same category comparison catalog used in validation, so the category page, comparison page, and provider reviews stay aligned.

SEEDPLATE 24 Words

Single 2mm etched steel plate, 12 words per side, marked with a separately sold centre punch.

Editor lead

Single 2mm etched steel plate, 12 words per side, marked with a separately sold centre punch. Strongest on where the fire number comes from (10/10): The SEEDPLATE site publishes no temperature figure and instead sends the buyer to the independent test: the page reads "Destruction test results", where the words 'test results' are an anchor whose href is jlopp.github.io/metal-bitcoin-storage-reviews/reviews/seedplate/. Its only material claims are "Tough 2mm thick… Weakest on whether the real landed price is on the page (7/10): "IN-STOCK $59.99 $49.97 SEEDPLATE® 24 Words" is on the page, but the tool needed to use it is a separate line item, "IN-STOCK $12.99 Center Punch", taking the real entry price to $62.96, and no shipping cost or tax basis appears on the product page. Published price: "IN-STOCK $59.99 $49.97 SEEDPLATE® 24 Words" with "Single 24 word plate, 12 words per side! Quality, thick steel, cut and etched in Canada." and "Center Punch sold separately.", the punch listed separately as "IN-STOCK $12.99 Center Punch" (fetched…

Best for: Where the fire number comes from — 10/10

BitBox Steelwallet

Two engraved stainless sheets, 12 words each, marked with an included automatic punch.

Best for: Whether the real landed price is on the page — 10/10

CRYPTOTAG Zeus

Two titanium plates recording BIP39 word index numbers, punched, 12 words per plate.

Two titanium plates recording BIP39 word index numbers, punched, 12 words per plate. Strongest on whether someone neutral actually destroyed one (9/10): Lopp graded the CryptoTag Zeus A overall with A on heat, A on corrosion and A on crush at $130 - read from the consolidated table at jlopp.github.io/metal-bitcoin-storage-reviews and confirmed by reading the Round VI grade image at blog.lopp.net/content/images/2022/09/ratings.png. Round VI, published 2022-08-27. He… Weakest on whether the real landed price is on the page (3/10): The served HTML contains no price - verified by looking rather than asserted: no og:price meta tag, one JSON-LD Product block with aggregateRating but no offers, and the only '149' digit strings in the file are part of an image filename hash. The template renders x-text="formatPrice(price)" and fetches the value at… Published price: No price appears anywhere in the served HTML of the product page - verified by looking: there is no Open Graph price tag, the single JSON-LD Product block carries name, description and aggregateRating but no offers object, and the only occurrences of the…

Best for: Whether someone neutral actually destroyed one — 9/10

Browse this network

Methodology

How this category is reviewed

Reviewed on whether someone neutral actually destroyed one, where the fire number comes from, whether you can still read it afterwards, and the price you can see before checkout.

Reviewed on: Whether someone neutral actually destroyed one, Where the fire number comes from, What you can store, and whether you can read it back afterwards, Whether the real landed price is on the page.

This page is a maintained category surface, not a static marketing block. Review freshness, provider positioning, and recommendation logic should stay consistent with quiz and provider pages.

Frequently asked

Questions people ask before choosing seed backup

Does a higher temperature rating mean a better backup?

No, and in this pool the correlation runs the other way. A stated rating is usually the melting point of the alloy — a property of stainless steel that any product made from it can claim — not a result of testing that product. One backup advertised a fireproof threshold of 1399 to 1455°C, which is very nearly the published melting range of grade 304 steel, and lost the seed roughly 300°C below it. Another prints the melting point and the fire rating as the same number, two paragraphs apart on the same page. Meanwhile the two most credible products in the pool publish no temperature at all. Treat the number as marketing and the independent grade as evidence.

Why weight independent testing so heavily?

Because it is the only claim in this category anyone can check, and because the failure mode is undetectable until it matters. You will not learn that your backup was inadequate until after a fire, by which point the phrase is gone. Jameson Lopp has published fire, crush and acid results across dozens of these devices, and one vendor in this pool links to those results directly from its own product page — which is a meaningful signal in itself, since the products with the most to hide point you at their own marketing instead.

Is surviving the fire the same as still being usable?

Not at all, and they are scored separately here for that reason. A plate can come out of a furnace structurally intact with the stamped letters deformed or the tiles fused, which is a device that survived and a backup that did not. The tester's own framing is useful: a capsule seizing shut is not a critical failure, because the phrase is still recoverable by someone willing to cut it open, whereas illegible characters are terminal. Ask what state the phrase is in afterwards, not whether the object still exists.

REVIEWEDApr 2026METHOD4 criteriaCATEGORYseed_backup

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