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WThumb vs GridBulk

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

WThumb compared with GridBulk
DetailWThumb logo WThumbGridBulk logo GridBulk
What it doesAI thumbnail maker for YouTube that remakes references around your title and persona AI batch image generation with grid splitting: one prompt, up to 16 images, one credit
StageNot given Startup
FoundedNot given 2026
Based inNot given Not given
Pricing modelFreemium Freemium
PricingFree: 2 credits. Starter: $12/month (40 credits) or $9/month billed yearly. Creator: $28/month (160 credits) or $21/month billed yearly. Studio: $56/month (400 credits) or $42/month billed yearly. Free plan includes 20 credits on signup with the first generation free. Basic: $19/month for 2,000 credits/month (≈32,000 images with 4×4 grid). Pro: $49/month for 5,000 credits/month (≈80,000 images with 4×4 grid). Max: $99/month for 10,000 credits/month (≈160,000 images with 4×4 grid).
Key features
  • Reference-based thumbnail generation from YouTube links or uploaded images
  • Prompt-based thumbnail generation from video descriptions
  • Persona system with face generation or faceless options
  • Full HD+ output at 2048 × 1152 for 16:9 and 1152 × 2048 for 9:16
  • Edit thumbnails using plain text descriptions
  • Support for multiple languages in thumbnail text
  • Library of thousands of high-performing thumbnails from popular channels
  • No watermark on any plan including free credits
  • Automatic credit refund if thumbnail generation fails
  • Credit rollover option to carry unused credits to next month
  • Generate up to 16 images in a single 4×4 grid
  • Grid splitting into individual pixel-perfect assets
  • REST API with sync and async endpoints
  • MCP server for AI agent integration
  • Reference image support for style guidance
  • Runs on Google Gemini and OpenAI GPT Image models
  • Dashboard history with searchable generations
What makes it different
  • Reference-led approach gives a strong visual starting point without blank canvas
  • No design skills required, no layers or canvas tools
  • Same high quality generator on all plans including free tier
  • Personalized thumbnails with your face or faceless versions
  • Both landscape 16:9 and vertical 9:16 Shorts formats on every plan
  • One credit per grid instead of per image, reducing cost per image to 1/16 for 4×4 grids
  • Contact-sheet view for side-by-side comparison of all results
  • API and MCP server built for AI agents as first-class users
  • Independent and self-funded operation
  • First generation completely free with 20 signup credits
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)1 no change since last checkNot checked yet no change since last check
Trust Flow (Majestic)60
Citation Flow (Majestic)230
Referring domains (Majestic)80

5 details filled in for both companies.

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