
SpecialistA massive Japanese community platform specializing in AI illustration discovery, sharing, and prompt generation.
SpecialistA massive Japanese community platform specializing in AI illustration discovery, sharing, and prompt generation.
ChartDB records 49,523 monthly visits with -33.4% month-over-month growth and Freemium pricing. PromptHero records 1,044,654 monthly visits with -2.4% growth and Freemium pricing.

Open-source database diagram editor with AI-generated ER diagrams
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | chartdb.io | prompthero.com |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 49.52K (49,523) | 1.04M (1,044,654) |
| MoM Traffic Delta | -24.87K (-33.4%) | -25.86K (-2.4%) |
| Primary Market & Share | 🇺🇸 United States (12.1%) | 🇺🇸 United States (15.9%) |
| Direct Visits / mo | 19.95K | 294.24K |
| User Rating | 4.6 | 4.4 |
| Supported Platforms | Website | Website |

Open-source database diagram editor with AI-generated ER diagrams
Paste a single read-only query result and ChartDB renders the whole schema as an ER diagram, with no direct database access or local agent required.
Describe a database idea in plain language and get a fully editable, optimized ER diagram that you can refine and export straight to SQL.
Export clean DDL scripts in your preferred SQL dialect or download diagrams as images and embeddable previews for documentation.
On Cloud plans, diagrams stay in sync with the live database automatically, with change logs and version history to track every schema drift.
Search millions of AI prompts and generate images and videos with every major model
Search and filter a large library of community prompts by model, style or category, and see the exact text behind each result.
Create images and videos on-site with models including ChatGPT Image, Midjourney, FLUX, Nano Banana, Seedream, Veo and Sora.
Browse documented AI image, video and language models in one catalogue to decide which engine fits your task.
Paid plans keep your output unlisted, and unused generation credits accumulate instead of expiring each month.

SpecialistA massive Japanese community platform specializing in AI illustration discovery, sharing, and prompt generation.
SpecialistA massive Japanese community platform specializing in AI illustration discovery, sharing, and prompt generation.
Free / Open-sourceProvides deep community-driven model and prompt discovery for image generation, with built-in cloud execution capabilities.
Combines prompt discovery and model hosting with online generation for Stable Diffusion and LoRA checkpoints.
Combines prompt discovery and model hosting with online generation for Stable Diffusion and LoRA checkpoints.
Features a massive community prompt library with instant chat execution, though with less curated image-specific search filters.
Features a massive community prompt library with instant chat execution, though with less curated image-specific search filters.
Free / Open-sourceOffers trending prompt discovery paired with an integrated generation canvas for direct image remixing.
Free / Open-sourceOffers trending prompt discovery paired with an integrated generation canvas for direct image remixing.

An online marketplace for buying and selling verified prompt templates, whereas PromptHero focuses on free community discovery.
An online marketplace for buying and selling verified prompt templates, whereas PromptHero focuses on free community discovery.
SpecialistAI diagrams and technical design docs built from your code and systems
SpecialistAI diagrams and technical design docs built from your code and systems

SpecialistAI-powered visual collaboration for diagrams, mind maps, and charts
SpecialistAI-powered visual collaboration for diagrams, mind maps, and charts
Free / Open-sourceFree open course for prompt engineering and AI security
Free / Open-sourceFree open course for prompt engineering and AI security

SpecialistFocuses specifically on Midjourney artistic styles and SREF reference codes rather than general multi-model prompt search.
SpecialistFocuses specifically on Midjourney artistic styles and SREF reference codes rather than general multi-model prompt search.

SpecialistAI SQL assistant that writes, fixes and runs queries on your real schema
SpecialistAI SQL assistant that writes, fixes and runs queries on your real schema

Free / Open-sourceAI text-to-SQL client for database management and analysis
Free / Open-sourceAI text-to-SQL client for database management and analysis