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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 | seaart.ai | Let's Enhance | Switch / compare |
|---|---|---|---|
| Background removal | 84/100 2048 × 2048 · PNG | Not tested in topic | Compare in task topic → |
| Image upscaling | 79/100 1024 × 1024 · PNG | 76/100 2048×2048 (JPG · 4.0x Prime Upscale · Bottom-left watermark) · Historical description; output not attached | Active task |
| Object removal | 86/100 2048 × 2048 · PNG | Not tested in topic | Compare in task topic → |
| Image generation | 83/100 WEBP · Output attached | 80/100 2048×2048 (9.96 MB PNG · Bottom-left watermark on free credits) · Historical description; output not attached |
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Browse this task →| Criterion | SeaArt (AI Image Upscaler) Image upscaling 79/100 Seven-aspect task score SeaArt AI Upscaler offers Precise and Creative modes, delivering a clean 1024x1024 watermark-free image (PSNR 26.47 dB, SSIM 0.8810) at 2K. While inference and queue latency took ~80s, structural fidelity and text preservation remain solid, consuming 40 daily free credits. Tested export 1024 × 1024 · PNG Historical test · 2026-11-04 | Let's Enhance (Prime 4x Upscaler) Image upscaling 76/100 Seven-aspect task score 4× detail is good and the workspace is ad-free, but registration is required and trial-credit exports still carry a watermark not disclosed before signup. Tested export 2048×2048 (JPG · 4.0x Prime Upscale · Bottom-left watermark) · Historical description; output not attached Historical test · 2026-10-16 |
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| Pricing & rules | ||
| Pricing plans | 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 ↗ | Let’s Enhance personal subscription plans (Free Trial / Starter / Pro / Max); USD · 2026-10-21 Plan · source date Monthly / one-time Annual bill / period Quota & limits Signup free allowance2026-10-21 ↗ Free trial Trial Trial 10 free credits upon signup (1 credit per upscaled image, 2 credits per AI generation; free-credit exports include watermark). Starter Monthly (100 credits)2026-10-21 ↗ USD 12/month — Monthly 100 credits/month (unused credits roll over up to 600 credits); upscaling up to 256 MP, AI art generation, and watermark-free export. Starter Annual (100 credits/mo)2026-10-21 ↗ — Annual price not verified Annual 100 credits/month (accumulate up to 600 credits); card displays USD 9/month equivalent billed annually. Public card displays only the USD 9/month equivalent ("Billed annually") without showing the annual invoice total before login. Pro Monthly (300 credits)2026-10-21 ↗ USD 32/month — Monthly 300 credits/month (unused credits roll over up to 1,800 credits); upscaling up to 350 MP, AI art generation, and watermark-free export. Pro Annual (300 credits/mo)2026-10-21 ↗ — Annual price not verified Annual 300 credits/month (accumulate up to 1,800 credits); card displays USD 24/month equivalent billed annually. Public card displays only the USD 24/month equivalent ("Billed annually") without showing the annual invoice total before login. Max Monthly (500 credits)2026-10-21 ↗ USD 45/month — Monthly 500 credits/month (unused credits roll over up to 3,000 credits); upscaling up to 512 MP, AI art generation, and watermark-free export. Max Annual (500 credits/mo)2026-10-21 ↗ — Annual price not verified Annual 500 credits/month (accumulate up to 3,000 credits); card displays USD 34/month equivalent billed annually. Public card displays only the USD 34/month equivalent ("Billed annually") without showing the annual invoice total before login. 7 plan / billing-period records, all listed; — means that period is not recorded. The official pricing page and FAQ list personal monthly prices: Starter USD 12/month (100 credits/month), Pro USD 32/month (300 credits/month), and Max USD 45/month (500 credits/month), with unused credits rolling over up to 6x the monthly allowance. Annual cards display only monthly equivalents (USD 9 / 24 / 34 per month, "Billed annually") without printing the annual invoice total on the public page, so annual totals are marked unverified. Verification has gaps; unknown prices and quotas are not inferred. Cancellation, sources & verification recordCancel anytime via the Cancel Subscription button on the Pricing page; remaining unused credits expire at the end of the paid billing period. Purchasing any plan or bundle unlocks watermark-free downloads for previously processed images. Let’s Enhance official pricing and credit rules FAQ ↗ · 2026-10-21 Capture 1 ↗ |
| Free & trial allowance on the test date | Daily login grants Stamina; 2K upscale consumes 40 computing points | New accounts receive 10 free credits (1 credit per upscale; 9 credits left after test); removing the watermark and unlocking 8x/16x require a paid subscription |
| Cancellation & refunds | Not verified | Cancel anytime via the Cancel Subscription button on the Pricing page; remaining unused credits expire at the end of the paid billing period. Purchasing any plan or bundle unlocks watermark-free downloads for previously processed images. |
| Disclosure of costs & limits | Credit consumption disclosed upfront before processing | Watermark appears only on the generated thumbnail and downloaded file after signup and processing |
| Task quality | ||
| Measured fixture results | Tested scale: 2× | Tested scale: 4× |
| Fixture findings | Achieves PSNR 26.47 dB and SSIM 0.8810 under 2K Precise mode, preserving intact REALTEST 2026 text with clean native 1024x1024 watermark-free export. | Text was clear in this 4× output; the free-credit image carried a brand watermark. |
| Original historical observation | Plaque spelling REALTEST 2026 is complete and orderly, brass robot torso and ceramic cup highlights are well-preserved, overall PSNR=26.47 dB, SSIM=0.8810. | PSNR=27.02dB · SSIM=0.8631 (4x 2048×2048 Prime model); outstanding edge_corr=0.7108, hf_ratio=0.7910, and plate_psnr=17.25dB with razor-sharp 'REALTEST 2026' and 'REALTEST 2048px GT' typography, though free-credit exports include a bottom-left Let's Enhance watermark. |
| Suitable uses · historical assessment | Users needing daily 2K super-resolution enhancement with available free Stamina | Print and design professionals who need ultra-crisp 4x–16x texture restoration and are willing to subscribe to remove the watermark |
| Result & output evidence | No native output obtained; the preview does not establish final export quality. | |
| Delivery capabilities | ||
| Recorded export specifications | 1024 × 1024 · PNG · No watermark in test | 2048×2048 (JPG · 4.0x Prime Upscale · Bottom-left watermark) · Historical description; output not attached · Check watermark record No native output is attached; check the evidence for specification and watermark claims. |
| Historical specification note · not an official maximum | 1024×1024 (PNG · 2.0x Free Tier) | 2048×2048 (4.0x · Free tier unlocks 1x/2x/4x; 8x/16x require paid plan) |
| Watermark observation | Completely watermark-free | Free-credit exports carry a semi-transparent 'Let's Enhance .io' logo in the bottom-left corner |
| Batch & API | Supports web interface and API batch calls | Supports multi-image batch queues (up to 50MB/file) and enterprise Claid.ai API |
| Recorded free-tier dimensions | 1024 × 1024 | Not verified |
| Attached file dimensions | 1024 × 1024 · PNG | Not verified |
| Speed & reliability | ||
| Timing observation | Network-observed server wait: 80.66s · End-to-end reference: 80.66s | Network-observed server wait: 20.1s · End-to-end reference: 22.2s |
| Date & fixture | 2026-11-04 · anchor_upscale_v1 · US-West (California, AS2914) | 2026-10-16 · anchor_upscale_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 | Account required in this test | Account required in this test |
| Sign-in methods | Google / Email Login | Mandatory Google or Email registration at /signup after selecting a file |
| Manual adjustment | Not verified | Not verified |
| Interaction observations | Clean dual-mode interface offering Precise and Creative modes across 2K/4K/6K/8K tiers with zero intrusive popups. | Uses an 'upload-first, signup-gate-second' funnel, though it preserves the uploaded image in the `/boost` queue after login; workspace is clean and ad-free. |
| Background & reputation | ||
| Service lifecycle notice | Not verified | Not verified |
| Operator | STAR CLOUD PTE. LTD. (SeaArt) | Let's Enhance Inc. (San Francisco, CA, USA) |
| Recorded origin | Singapore | San Francisco, USA (Ukrainian-founded team) |
| Domain history record | 2023–Present | 2017–Present |
| Background & reputation assessment | Operated by STAR CLOUD PTE. LTD. (Singapore), with an active community, extensive model ecosystem, and sound compliance policies. | Operated by Let's Enhance Inc. (founded 2017, San Francisco, CA, Techstars alum), one of the earliest commercial deep-learning super-resolution platforms. |
| External reputation record | Active global AIGC community with millions of creator-published styles and LoRA assets across mobile and web. | Not verified |
| Engineering & privacy | ||
| Processing location | Uploaded for cloud processing | Uploaded for cloud processing |
| Third-party tracking record | Google Tag Manager · Cloudflare · Stripe | Not verified |
| Engineering & privacy assessment | Full HTTPS encryption across all endpoints, providing task management and one-click data deletion. | Provides multi-model SR controls (Prime, Gentle, Old photo, Light AI) and 1x–16x scale factors over a stable cloud queue. |
| Retention statement | Explicit retention period unconfirmed; inspect policy record | Explicit retention period unconfirmed; inspect policy record |
| Evaluation basis | ||
| Pricing transparency | 25 / 35 Dual Stamina consumption system clearly labels the 40-credit cost for 2K upscaling (subscription tiers accessible upon login). Transparency is solid. | 18 / 35 The home page (Screenshot ①) presents a drag-and-drop uploader that immediately redirects to `/signup` promising 'Get started with 10 images free' (Screenshot ④); signing in via Google grants 10 credits and unlocks Prime 4x (2048×2048), but the exported 2048×2048 JPG embeds a semi-transparent 'Let's Enhance .io' watermark in the bottom-left corner (Screenshot ③) that was not disclosed on the signup page. |
| Interaction restraint | 24 / 30 Clean dual-mode interface offering Precise and Creative modes across 2K/4K/6K/8K tiers with zero intrusive popups. | 21 / 30 Uses an 'upload-first, signup-gate-second' funnel, though it preserves the uploaded image in the `/boost` queue after login; workspace is clean and ad-free. |
| Background & reputation | 16 / 20 Operated by STAR CLOUD PTE. LTD. (Singapore), with an active community, extensive model ecosystem, and sound compliance policies. | 18 / 20 Operated by Let's Enhance Inc. (founded 2017, San Francisco, CA, Techstars alum), one of the earliest commercial deep-learning super-resolution platforms. |
| Engineering & privacy | 13.5 / 15 Full HTTPS encryption across all endpoints, providing task management and one-click data deletion. | 13 / 15 Provides multi-model SR controls (Prime, Gentle, Old photo, Light AI) and 1x–16x scale factors over a stable cloud queue. |
| Task quality | 55 / 65 PSNR vs 2048px GT: 26.47 dB · SSIM: 0.881 · Edge Gradient Correlation: 0.6014 · High-Freq Sharpness Ratio: 0.4547 · Calibration Plate PSNR: 15.23 dB | 59 / 65 PSNR vs 2048px GT: 27.02 dB · SSIM: 0.8631 · Edge Gradient Correlation: 0.7108 · High-Freq Sharpness Ratio: 0.791 · Calibration Plate PSNR: 17.25 dB |
| Deliverable specifications | 18 / 20 No free unwatermarked export (0/8); Free scale factor: 2x (1024×1024 (PNG · 2.0x Free Tier)) | 12 / 20 No free unwatermarked export (0/8); Free scale factor: 4x (2048×2048 (4.0x · Free tier unlocks 1x/2x/4x; 8x/16x require paid plan)) |
| Processing speed | 6.5 / 15 Network-observed server wait: 80.66s (API mode: async_poll; end-to-end 80.66s shown for reference only, never penalized) | 8 / 15 Network-observed server wait: 20.1s (API mode: async_poll; end-to-end 22.2s shown for reference only, never penalized) |
