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Test scope & comparison notes
These are recorded facts, not a unified ranking. Tested tiers and scope are not consistently recorded. Read pricing with its date and timing with its conditions. Privacy observations reflect visible flows and statements, not a security audit.
Cross-task capability coverage across selected products
Each product is scored independently per task edge; switch tasks below while keeping shared products selected| Task edge | tools.hellokeyboard.com | seaart.ai | Switch / compare |
|---|---|---|---|
| Background removal | 89/100 2048 × 2048 · PNG | 84/100 2048 × 2048 · PNG | Active task |
| Image compression | 92/100 JPEG · Output attached | Not tested in topic | Compare in task topic → |
| Image upscaling | Not tested in topic | 79/100 1024 × 1024 · PNG | Compare in task topic → |
| Object removal | Not tested in topic | 86/100 2048 × 2048 · PNG | Compare in task topic → |
| Image generation | Not tested in topic | 83/100 WEBP · Output attached | Compare in task topic → |
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Browse this task →| Criterion | Hello Keyboard Tools Background removal 89/100 Seven-aspect task score Hello Keyboard Tools Background Remover is a completely free, login-free, ad-free online utility. In our standard 2048×2048 curly hair portrait benchmark, its single-call Cloudflare Images pipeline achieved 99.88% foreground recall with just 0.019% background leakage and an impressive 0.086 mad_band transition error. The service exports the full 2048×2048 transparent PNG without downscaling or watermarks, with a verified server processing time of 2.97 seconds. With transparent terms, zero login walls, and no persistent file retention, it stands out as an exceptional free option for quick background removal. Tested export 2048 × 2048 · PNG Historical test · 2026-11-06 | SeaArt Background removal 84/100 Seven-aspect task score SeaArt Background Remover achieves top-tier hair strand separation with 99.84% foreground recall on the 2048x2048 benchmark anchor, providing ~150 daily free Stamina and pristine 2048px watermark-free transparent PNGs with excellent commercial honesty despite requiring login and taking ~15.5s. Tested export 2048 × 2048 · PNG Historical test · 2026-11-04 |
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| Pricing & rules | ||
| Pricing plans | Hello Keyboard Tools site-wide free utilities · 2026-11-06 Plan · source date Monthly / one-time Annual bill / period Quota & limits Web Free2026-11-06 ↗ Free Free Free Free use across all utilities without registration; supports up to 20 MB per file depending on the tool 1 plan / billing-period records, all listed; — means that period is not recorded. The official site declares tools are free to use, require no login, no subscription, with files primarily processed locally in the browser. Cancellation, sources & verification recordCompletely free utility suite; no subscription or cancellation required. Hello Keyboard Tools homepage declaration and tool directory ↗ · 2026-11-06 Capture 1 ↗ Hello Keyboard Tools privacy and processing policy ↗ · 2026-11-06 Capture 1 ↗ | SeaArt.ai Stamina and VIP subscription model · 2026-11-01 Plan · source date Monthly / one-time Annual bill / period Quota & limits Free Tier (Daily Stamina)2026-11-01 ↗ Free Free Free ~150 daily Stamina refreshed every 24 hours Base image generation, upscaling, background removal, and community models；Unused stamina resets daily; standard queue; excludes custom LoRA training；Refreshes daily, no renewal；Perpetual access Standard VIP2026-11-01 ↗ Monthly price not verified — Monthly Higher daily Stamina allowance, bonus coins, and fast-track queues Fast-track generation, concurrent tasks, and commercial licensing；Pricing visible inside account store (typically approx $9.99/mo)；Auto-renews monthly；Active during billing month 2 plan / billing-period records, all listed; — means that period is not recorded. Uses daily regenerating Stamina (~150/day free) plus persistent Coins; paid plans include Standard VIP (~$9.99/mo), Pro (~$29.99/mo), and SVIP tiers detailed within account portals. Verification has gaps; unknown prices and quotas are not inferred. Cancellation, sources & verification recordCancellation and refund terms unverified SeaArt AI Official Homepage and Community ↗ · 2026-11-01 Capture 1 ↗ |
| Free & trial allowance on the test date | Not verified | ~150 daily Stamina refreshed every 24h (~3.6-4 Stamina per removal, allowing ~35-40 free removals daily) |
| Cancellation & refunds | Completely free utility suite; no subscription or cancellation required. | Not verified |
| Disclosure of costs & limits | Not verified | Estimated cost clearly shown before triggering removal (4 Stamina, discounted to 3.6) |
| Task quality | ||
| Measured fixture results | Edge error MAD: 0.0863 (Lower is better) · Global error SAD(k): 39.716 (Lower is better) · Foreground retention: 99.880% (Higher is better) · Background residue: 0.019% (Lower is better) | Edge error MAD: 0.0941 (Lower is better) · Global error SAD(k): 42.688 (Lower is better) · Foreground retention: 99.840% (Higher is better) · Background residue: 0.020% (Lower is better) |
| Fixture findings | On the standard curly hair portrait anchor (anchor_bgremove_v1), Hello Keyboard Tools delivered a full-resolution 2048×2048 watermark-free transparent PNG. It achieved 99.88% foreground recall with minimal 0.019% background leakage, clean hair boundary matting (mad_band=0.086, SAD(k)=39.7), and zero baked-in checkerboard artifacts. With a verified 2.97s server wait time, deliverable fidelity and performance are exemplary. | Delivers 99.84% foreground recall and 0.02% background leak at 2048x2048, with natural boundary transitions, authentic Alpha channel, and zero watermarks. |
| Original historical observation | Not verified | SeaArt demonstrated top-tier precision on anchor_bgremove_v1, preserving delicate curly hair strands (99.84% recall) with near-zero background residue (0.02% leak) at 2048x2048. |
| Suitable uses · historical assessment | Not verified | Designers and creators requiring ultra-high hair strand retention and full 2048px clean PNGs |
| Result & output evidence | ||
| Delivery capabilities | ||
| Recorded export specifications | 2048 × 2048 · PNG · Check watermark record | 2048 × 2048 · PNG · No watermark in test |
| Historical specification note · not an official maximum | 2048 × 2048 (preserving native dimensions, watermark-free transparent PNG) | 2048 × 2048 (100% original size transparent PNG, no watermarks) |
| Watermark observation | Not verified | No watermark |
| Batch & API | Not verified | Single-image processing and gallery history management |
| Recorded free-tier dimensions | 2048 × 2048 | 2048 × 2048 |
| Attached file dimensions | 2048 × 2048 · PNG | 2048 × 2048 · PNG |
| Speed & reliability | ||
| Timing observation | Network-observed server wait: 2.97s · End-to-end reference: 24.78s | Network-observed server wait: 15.49s · End-to-end reference: 15.49s |
| Date & fixture | 2026-11-06 · anchor_bgremove_v1 · US-West (California, AS2914) | 2026-11-04 · anchor_bgremove_v1 · US-West (California, AS2914) |
| Repeated tests & reliability | No standardized repetition count, success rate or variability range is recorded. | No standardized repetition count, success rate or variability range is recorded. |
| Interaction experience | ||
| Account requirements | Not verified | Account required in this test |
| Sign-in methods | Not verified | Account required (Google SSO and email registration supported) |
| Manual adjustment | Not verified | Not verified |
| Interaction observations | Not verified | Not verified |
| Background & reputation | ||
| Service lifecycle notice | Not verified | Not verified |
| Operator | Not verified | STAR CLOUD PTE. LTD. |
| Recorded origin | Not verified | Not verified |
| Domain history record | Not verified | Not verified |
| Background & reputation assessment | Not verified | Not verified |
| External reputation record | Not verified | Not verified |
| Engineering & privacy | ||
| Processing location | Processing location unconfirmed | Uploaded for cloud processing |
| Third-party tracking record | Google Analytics · Cloudflare Web Analytics | Google Tag Manager · Cloudflare · Stripe |
| Engineering & privacy assessment | Not verified | Not verified |
| Retention statement | Explicit retention period unconfirmed; inspect policy record | Explicit retention period unconfirmed; inspect policy record |
| Evaluation basis | ||
| Pricing transparency | ||
| Interaction restraint | ||
| Background & reputation | ||
| Engineering & privacy | ||
| Task quality | 54.2 / 65 Transition band error mad_band=0.0863 · Global SAD(k)=39.716 · Foreground recall 99.88% / Background leak 0.019% | 58 / 65 Transition band error mad_band=0.0941 · Global SAD(k)=42.688 · Foreground recall 99.84% / Background leak 0.020% |
| Deliverable specifications | 20 / 20 True Alpha channel (8/8); Max deliverable spec: 2048 × 2048 (preserving native dimensions, watermark-free transparent PNG) | 20 / 20 True Alpha channel (8/8); Max deliverable spec: 2048 × 2048 (100% original size transparent PNG, no watermarks) |
| Processing speed | 13 / 15 Network-observed server wait: 2.97s (API mode: sync; network upload 17.41s / end-to-end 24.78s shown for reference only, never penalized) | 8 / 15 Network-observed server wait: 15.49s (API mode: async_verified; network upload 0s / end-to-end 15.49s shown for reference only, never penalized) |
