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ThumbnailMaker vs GridBulk

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

ThumbnailMaker compared with GridBulk
DetailThumbnailMaker logo ThumbnailMakerGridBulk logo GridBulk
What it doesAI thumbnail maker for YouTube that writes the brief, generates the image and checks it at feed size AI batch image generation with grid splitting: one prompt, up to 16 images, one credit
StageNot given Startup
FoundedNot given 2026
Based inMA Not given
Pricing modelPaid Freemium
PricingNot given 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
  • Paste YouTube video link to automatically write brief from title, description and transcript
  • Text is read back and corrected if letters are wrong
  • Checked at feed size with readability graded at 336 pixels
  • Brand kit to apply channel colors, lettering and visual style to every thumbnail
  • Export at 4K resolution (3840×2160) recommended by YouTube
  • Auto-Polish finds weakest point and fixes it automatically
  • 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
  • Text automatically checked and corrected before you see the image
  • Built specifically for YouTube's constraints like duration badge corner and feed size
  • Full commercial rights with no watermark on any 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)2 +2 (up) since last checkNot checked yet no change since last check
Trust Flow (Majestic)60
Citation Flow (Majestic)240
Referring domains (Majestic)120

4 details filled in for both companies.

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