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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 | birme.net | BgSub | Switch / compare |
|---|---|---|---|
| Background removal | 83/100 2048 × 2048 · PNG | 75/100 2048 × 2048 · PNG | Active task |
| Image compression | 83/100 512 × 512 · PNG | Not tested in topic | Compare in task topic → |
| Image upscaling | 94/100 2048 × 2048 · PNG | Not tested in topic | Compare in task topic → |
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Browse this task →| Criterion | BIRME Background removal 83/100 Seven-aspect task score BIRME employs an innovative client-side WebGPU/WASM matting engine. Processing the 2048×2048 curly hair portrait took 28.5s entirely within the browser, achieving 99.9% foreground recall and only 0.8% background residue. Completely free without login, it exports full-resolution unwatermarked transparent PNGs with total privacy. Tested export 2048 × 2048 · PNG Historical test · 2026-11-04 | BgSub (In-Browser AI) Background removal 75/100 Seven-aspect task score Free, login-free on-device processing suits users who want to keep photos local; complex curls lose edge detail. Tested export 2048 × 2048 · PNG Historical test · 2026-10-16 |
|---|---|---|
| Pricing & rules | ||
| Pricing plans | BIRME 100% free client-side batch image processing and compression · 2026-11-01 Plan · source date Monthly / one-time Annual bill / period Quota & limits Free2026-11-01 ↗ Free Free Free Completely free without login; unlimited batch image processing constrained only by client memory Smart crop, format conversion (JPG/PNG/WebP/AVIF), quality compression, watermark, AI background removal and upscaling；Pure client-side execution; very large batches may consume significant browser memory；Permanently free, no renewal；Perpetual access 1 plan / billing-period records, all listed; — means that period is not recorded. All batch resizing, compression, AI background removal, and upscaling are 100% free with voluntary donation support and zero paid plans. Cancellation, sources & verification recordCancellation and refund terms unverified BIRME Official Studio ↗ · 2026-11-01 Capture 1 ↗ | BgSub free web remover; excludes custom/API services · 2026-10-20 Plan · source date Monthly / one-time Annual bill / period Quota & limits BgSub Web2026-10-20 ↗ Free Free Free Officially free; supports images up to 4096×4096 No usage-count limit published; API/batch services outside this scope 1 plan / billing-period records, all listed; — means that period is not recorded. 4096×4096 is an official supported specification; actual delivery remains tied to the historical test and attached file. Cancellation, sources & verification recordNo payment method required Official plans and usage terms ↗ · 2026-10-20 Capture 1 ↗ · Capture 2 ↗ |
| Free & trial allowance on the test date | Completely free without login; unlimited batch image processing constrained only by client memory | Completely free with unlimited usage (computation runs on user's local device via WebGL/WASM) |
| Cancellation & refunds | Not verified | No payment method required |
| Disclosure of costs & limits | Not verified | Discloses local browser execution upfront and shows exact 2048×2048 (5.53 MB) size in the save modal |
| Task quality | ||
| Measured fixture results | Edge error MAD: 0.1359 (Lower is better) · Global error SAD(k): 56.05 (Lower is better) · Foreground retention: 99.900% (Higher is better) · Background residue: 0.804% (Lower is better) | Edge error MAD: 0.1481 (Lower is better) · Global error SAD(k): 65.955 (Lower is better) · Foreground retention: 99.380% (Higher is better) · Background residue: 0.106% (Lower is better) |
| Fixture findings | Client-side 28.5s fine-hair matting with 99.9% recall, 0.8% residue, and unwatermarked full-res PNG export. | Local processing with full-size output; complex curly-hair edges look blocky and smoothed. |
| Original historical observation | BIRME in-browser AI matting ran locally in 28.5s, accurately separating subject from bookshelf and exporting a 5.78 MB transparent PNG. | Constrained by lightweight client-side WebGL/WASM model capacity, complex curly hair outer edges show softer semi-transparent halos (mad_band=0.1481, SAD(k)=65.96) compared to heavy cloud models, but foreground recall reaches 99.38% at full 2048×2048 resolution. |
| Suitable uses · historical assessment | Not verified | Privacy-sensitive users who require 0-byte cloud upload (100% local browser execution) and unlimited no-login 2048×2048 full-resolution exports |
| 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 | 2048x2048 (PNG full resolution transparent deliverable) | 2048×2048 (no-login local in-browser inference exports full 2048×2048 PNG, supporting up to 4096×4096) |
| Watermark observation | Not verified | None |
| Batch & API | Not verified | Single-image interactive workspace |
| 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: 28.5s · End-to-end reference: 28.5s | Recorded local processing time: 1.77s · End-to-end reference: 1.77s |
| Date & fixture | 2026-11-04 · anchor_bgremove_v1 · US-West (California, AS2914) | 2026-10-16 · 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 | No login in this test |
| Sign-in methods | Direct usage without login | No login required; exports full 2048×2048 original resolution directly |
| Manual adjustment | Not verified | Left sidebar includes built-in Edit (erase/restore brush), Color, Image, Filter, and Enhance tools |
| Interaction observations | Not verified | Zero login requirement, zero marketing popups, zero cross-site redirects; processes locally in the browser and saves a 2048×2048 watermark-free PNG in one click. |
| Background & reputation | ||
| Service lifecycle notice | Not verified | Not verified |
| Operator | BIRME Project | BgSub Independent Team (bgsub.com) |
| Recorded origin | United Kingdom | Independent Developer Project |
| Domain history record | Established in 2013 | Launched 2022 |
| Background & reputation assessment | Not verified | Built by an independent developer team (launched 2022) and well-regarded in privacy-focused and indie web tool communities. |
| External reputation record | Continuously operating for over 13 years since 2013, with over 50,000 monthly active users and widely praised for client-side privacy. | Praised on Product Hunt and privacy tool directories for keeping images 100% inside the local browser. |
| Engineering & privacy | ||
| Processing location | Processing location unconfirmed | On-device processing |
| Third-party tracking record | Google Analytics | Not verified |
| Engineering & privacy assessment | Not verified | CDP network packet inspection proves 0 bytes of image data are uploaded to any remote server—100% of segmentation inference runs locally in the browser via WebGL/WASM (15/15 privacy score). |
| Retention statement | Explicit retention period unconfirmed; inspect policy record | This flow runs locally; post-close deletion not independently verified |
| Evaluation basis | ||
| Pricing transparency | 40 / 40 100% free with no paywalls or hidden credit limits; clicking Save Image clearly displays exact output dimensions '2048 × 2048 (5.53 MB)' before saving. | |
| Interaction restraint | 20 / 20 Zero login requirement, zero marketing popups, zero cross-site redirects; processes locally in the browser and saves a 2048×2048 watermark-free PNG in one click. | |
| Background & reputation | 21 / 25 Built by an independent developer team (launched 2022) and well-regarded in privacy-focused and indie web tool communities. | |
| Engineering & privacy | 15 / 15 CDP network packet inspection proves 0 bytes of image data are uploaded to any remote server—100% of segmentation inference runs locally in the browser via WebGL/WASM (15/15 privacy score). | |
| Task quality | 46.5 / 65 Transition band error mad_band=0.1359 · Global SAD(k)=56.05 · Foreground recall 99.90% / Background leak 0.804% | 32.9 / 65 Transition band error mad_band=0.1481 · Global SAD(k)=65.955 · Foreground recall 99.38% / Background leak 0.106% |
| Deliverable specifications | 20 / 20 True Alpha channel (8/8); Max deliverable spec: 2048x2048 (PNG full resolution transparent deliverable) | 20 / 20 True Alpha channel (8/8); Max deliverable spec: 2048×2048 (no-login local in-browser inference exports full 2048×2048 PNG, supporting up to 4096×4096) |
| Processing speed | 11 / 15 Network-observed server wait: 28.5s (API mode: client_side; network upload 0s / end-to-end 28.5s shown for reference only, never penalized) | 13 / 15 Network-observed server wait: 1.77s (API mode: on_device_wasm; network upload 0s / end-to-end 1.77s shown for reference only, never penalized) |
