Sazmining
You buy a serial-numbered BTC miner outright; Sazmining hosts it, bills power at cost and takes 15% only on Bitcoin actually mined.
Wattum is still operating with real inventory, but the combination of hidden hosting pricing, an all-sales-final policy and years of credible customer complaints of non-performance makes it a watch-list operator rather than a safe host.
site unreachable (timeout) · checked 11 h ago · daily check
by the bestcloudmining editorial desk · curated review · prose updated 2026-10-02 · facts as of 2026-10-02 · how we verify
Wattum sells ASIC hosting and hardware through a live Shopify store (wattum.io after wattum.com died) operated by Wattum Management Inc. of Florida [1][4]. Hosting rates are published for the first time ($0.075-0.079/kWh) [1] - real commerce, but with an unresolved "do not host" community warning [7] and no published payout mechanics. We keep it on watch.
Hosted ASIC space at three named US facilities (Texas 1 air-cooled live, Texas 2 immersion coming soon, South Carolina live) [1], plus hardware - 24 products in stock at check, from an S21 at $4,334 to a 1.3 MW container at $105,000 [3]. The "nine hosting facilities across USA" and "97-98% uptime" figures are self-published marketing with no proof mechanism [2]. You ship your machines into their care; what happens after that (management fees, payout schedules) is not published - hosting onboarding runs through a contact form [1].
The terms of sale are more complete than our previous data: Florida governing law, binding AAA arbitration with a class-action waiver, shipping limited to the 48 contiguous states [4]. "All sales are final" is the banner, but the terms carve out 7-day dead-on-arrival contact and 14-day defective-unit windows [5]. No KYC policy exists anywhere on the site; checkout is card-based [5]. Payout mechanics for hosted miners - when and how you get paid - are simply not published [1]. The entity is real but the addresses are thin: the footer shows a Miami suite whose map label says "PMB" (private mailbox), and the terms list a second Aventura address [4].
Published, verifiable: the live product catalog with prices [3], the per-kWh hosting rates [1], and the legal terms [4]. Not verifiable: uptime ("at least 97% of the time" - no monitoring, no SLA remedy, no status page) [2], the nine-facility count [2], payout mechanics and KYC posture [1]. ScamAdviser's low score is stale and contradicted by its own Maltiverse "safe" flag - we weight it lightly [9].
The complaint trail is real and unresolved: a 2023 "potential scam" thread [8], and the freshest major signal remains an August 2025 comment - "Do not do not do not host with wattum" - with another user describing "many ups and downs over the years" [5]. Nothing new surfaced after that in either direction [6]; Google News for 2025-2026 is name-collision noise [5]. The business is plainly alive (24 in-stock products, current catalog) [3], which is why it stays listed - but the payout opacity plus the warning trail is exactly the profile our watch status exists for [1].
Hosting: $0.075/kWh Texas 1 (air), $0.075/kWh Texas 2 (immersion, coming soon), $0.079/kWh South Carolina [1]. Hardware: 24 SKUs in stock at check (S21 at $4,334 was among them) [3]. Refunds: 7-day DOA and 14-day defective carve-outs inside an all-sales-final policy [4]. KYC: not published [1]. There is no published management-fee schedule, payout threshold or exit clause for hosted miners - get everything in writing before shipping hardware [1].
Wattum is a functioning hardware store with newly transparent hosting rates and a properly structured (if supplier-friendly) Florida contract [1][4] - shadowed by a community warning that has never been publicly answered, unpublished payout mechanics, and marketing-grade uptime claims [2][5]. If you host there, negotiate the payout and exit terms in writing first, and start with a handful of machines [2].
| Documented price | $15 |
|---|---|
| Notes | Hosting price is not published (contact only). Store prices observed 2026-09-24 via wattum.io/products.json: Antminer S21 200TH $4,334; S21 XP 270TH $7,125; Whatsminer M50 110-122T $1,034; Antminer L9 16G $15,380; 3000 kVA transformer $79,000; Antbox N5 V2 745 kW container $95,000; Wattum WC324 1.3 MW 40' container $105,000. |
Run the long math before paying: cloud mining calculator →
Built only from what is documented on this page as of 2026-10-02 - anything not documented stays a gap on purpose.
Everything happens on wattum.com - we count the click, nothing else changes for you.
- start with the minimum, not with the plan the checkout page pushes.
maintenance Not published (hosting is quote-based) · refund: All sales are final. No returns or exchanges unless otherwise specified in the terms and conditions. A term you did not read is money you cannot get back.
No independent proof is documented. Withdraw the first payout early and compare it with the pool worker or your own wallet.
Then run the math: mining calculator · contract vs. HODL · all ASIC hosting providers.
Short answer: Based on our checks as of 2026-10-02: Wattum scores 4.2/10 in our weighted review. We logged 4 red flags (listed above). Facts are reported, not fully verified - test with a small purchase and a withdrawal first. Current status: watch - Wattum is still operating with real inventory, but the combination of hidden hosting pricing, an all-sales-final policy and years of credible customer complaints of non-performance makes it a watch-list operator rather than a safe host. User reports and operator background are documented with dated sources in the meta-review below.
| Status | watch |
|---|---|
| Operator | Wattum · HQ United States (high) |
| Founded | 2017 |
| Proof | none published |
| KYC | not documented |
A real, operating provider can still lose you money: with a contract you own no hardware, revenue follows coin price and difficulty, and most published contracts are priced so the seller comes out ahead. "Legit" means the operator exists and pays what its terms promise - not that the deal is profitable. 16 dated sources back this page; they are listed under sources.
Same category, scored on the same criteria - so the comparison stays honest. Compare only in the same unit, and read the minimum, KYC and proof columns before switching.
You buy a serial-numbered BTC miner outright; Sazmining hosts it, bills power at cost and takes 15% only on Bitcoin actually mined.
Polish GPU mining OS (SMOS, $2/rig/month prepaid) plus SimplePod.ai GPU cloud; not an ASIC host despite the name.
US ASIC hosting from $0.0750/kWh (1 MW+) with a one-time $100 setup fee and a live ASIC marketplace; Indiana, founded 2022.
Flat $225/machine/month all-inclusive Bitcoin hosting in six self-owned Oregon sites; customer owns the ASIC and keeps 100% of BTC.
Ready to try Wattum? Start small, verify one payout, and only scale up once the hashrate or compute actually matches what you paid for.
Based on our checks as of 2026-10-02: Wattum scores 4.2/10 in our weighted review. We logged 4 red flags (listed above). Facts are reported, not fully verified - test with a small purchase and a withdrawal first. Current status: watch - Wattum is still operating with real inventory, but the combination of hidden hosting pricing, an all-sales-final policy and years of credible customer complaints of non-performance makes it a watch-list operator rather than a safe host. User reports and operator background are documented with dated sources in the meta-review below.
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